A comparison of sampling methods for larvae of medium and large epipelagic fish species during spring SEAMAP ichthyoplankton surveys in the Gulf of Mexico
Open accessAbstract
Annual ichthyoplankton surveys have been conducted in the Gulf of Mexico during spring since 1982 by the National Oceanic and Atmospheric Administration (NOAA) National Marine Fisheries Service (NMFS) Southeast Area Monitoring and Assessment Program (SEAMAP). Historically, ichthyoplankton has been assessed using bongo and surface neuston nets. A new sampling gear, the S‐10 net, was tested between 2009 and 2011. This is a 1 × 2 m frame fitted with a 0.505 mm mesh net, towed in a yo‐yo fashion between the surface and 10 m. Sampling effectiveness of the three gears was compared by examining the abundance and length of larvae of bluefin tuna (Thunnus thynnus) and seven co‐occurring pelagic taxa (Auxis spp., Euthynnus alleteratus, Coryphaena spp., Katsuwonus pelamis, other Thunnus spp., family Istiophoridae, and Xiphias gladius) and vertical distributions of scombrid taxa were examined using MOCNESS samples. Permutational multivariate analysis of variance (PERMANOVA) of net type and time of sampling (day/night) indicated that net type was a significant factor in assessing abundance and length for all taxa. Highest abundances for seven of eight taxa were in S‐10 samples, and MOCNESS samples confirm highest scombrid abundance between the surface and 20 m. Our results show sampling effectiveness strongly depends on the depth fished by the net and that the S‐10 net was more effective than standard SEAMAP bongo and neuston nets. Thus, future sampling with the S‐10 net may improve the annual index of larval abundance for the western population of Atlantic bluefin tuna, traditionally based on abundance from bongo samples.
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Claims the paper makes
17 of 40 cited sources checked · 5 supported · 1 flagged · accuracy not yet measured
- Interpretationcitation
The authors find it unlikely that the vertical distributions of scombrids would simply be a result of passive dispersal due to differences in larval density and movement from physical processes.
“We find it unlikely that the vertical distributions of scombrids would simply be a result of passive dispersal due to differences in larval density and movement from physical processes (Sclafani et al. 1993;Boehlert and Mundy 1994;Hare et al. 2001).”
Quote in the paperNot a substantial claim1 of 3 sources checked- cites Sclafani et al. 1993 source
- cites Boehlert and Mundy 1994 source
The Discussion says the study found no strong contribution of larval behavior to vertical distribution and instead suggests that larval buoyancy may play an important role. It also describes a change in larval depth distribution as probably related to advective water-mass movement. These passages point toward, rather than rule out, passive and physical processes as explanations. (LLM, conf=0.86)
Checked by a reasoning model — may be wrong.
Experimental — accuracy not yet measured - cites Hare et al. 2001
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Findingcitation
Scombrid larvae exhibited different vertical distributions by species.
“Scombrid larvae exhibited different vertical distributions by species as has been described in previous studies (Davis et al. 1990;Boehlert and Mundy 1994;Hare et al. 2001).”
Quote in the paperNot a substantial claim2 of 3 sources checked - Interpretationown data
Istiophoridae larvae are likely concentrated at or near the surface.
“In addition, the similarity in mean abundance for neuston and S-10 abundances of Istiophoridae indicate that larvae of this family are likely concentrated at or near the surface, confirming previous observations (Prince et al. 2005;Richardson et al. 2009;Rooker et al. 2012).”
Quote in the paperSubstantial claim2 of 3 sources checked- cites Prince et al. 2005
The Movements section (page unavailable) explicitly notes the capture of larvae in surface waters, and the Results report larval billfishes collected in neuston tows. This supports the cited paper as a previous observation of surface occurrence, but it does not establish that Istiophoridae larvae are concentrated there relative to deeper water. (LLM, conf=0.83)
Experimental — accuracy not yet measured - cites Richardson et al. 2009 source
- cites Rooker et al. 2012 source
The Methods (page not provided) report collecting sailfish and marlin larvae with neuston nets sampling approximately the upper 0.6–1.0 m, supporting their presence near the surface. The paper does not compare catches across depths, so it does not establish that Istiophoridae larvae are concentrated there. (LLM, conf=0.82)
Experimental — accuracy not yet measured
- Interpretationcitation
The differences in vertical distribution may be a result of a shallower thermocline, halocline, or pycnocline as would be seen in divergences associated with boundaries of anti-cyclonic eddies and the Loop Current frontal zone.
“These differences may be a result of a shallower thermocline, halocline, or pycnocline (Davis et al. 1990;Hare et al. 2001) as would be seen in divergences associated with boundaries of anti-cyclonic eddies and the loop current frontal zone.”
Quote in the paperNot a substantial claim1 of 2 sources checked- cites Davis et al. 1990 source
The Depth distribution section says a well-defined pycnocline appears to restrict tuna larvae to the mixed layer, supporting the proposed link between a shallow water-column boundary and vertical distribution. The paper does not establish a separate effect of a halocline, and its East Indian Ocean findings do not address the Loop Current or anticyclonic-eddy boundaries mentioned in the citing sentence. (LLM, conf=0.82)
Experimental — accuracy not yet measured - cites Hare et al. 2001
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
Many of the targeted pelagic taxa have shown vertical and horizontal distributions that would suggest direct or indirect competition with bluefin tuna larvae.
“Many of these taxa have shown vertical and horizontal distributions (Davis et al. 1990;Boehlert and Mundy 1994;Hare et al. 2001;Prince et al. 2005;Richardson et al. 2009;Muhling et al. 2010;Lindo-Atichati et al. 2012;Rooker et al. 2012) that would suggest direct or indirect competition with bluefin tuna larvae.”
Quote in the paperSubstantial claim2 of 3 sources checked- cites Davis et al. 1990 source
The Abstract and Diel vertical distribution section report the depth distributions of southern bluefin and other tuna larvae, including similar vertical dispersal at night. The cited paper does not establish horizontal overlap or suggest direct or indirect competition with bluefin tuna larvae; it notes differences in daytime depth and diet. Page numbers are not available in our copy. (LLM, conf=0.84)
Experimental — accuracy not yet measured - cites Boehlert and Mundy 1994 source
- cites Hare et al. 2001
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
The annual index of larval abundance for the western population of Atlantic bluefin tuna is the only fishery-independent data used in the international management of western Atlantic bluefin tuna by ICCAT.
“This index is the only fishery-independent data used in the international management of western Atlantic bluefin tuna, by the International Commission for the Conservation of Atlantic Tunas (ICCAT; Ingram et al. 2010).”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites Ingram et al. 2010 source
The Introduction (page not available in our copy) identifies the larval-abundance index as fishery-independent and says most indices used in western Atlantic bluefin tuna assessments were fishery-dependent. The Discussion (page not available) says a larval index was used in the 2008 stock assessment model. Neither passage establishes that it was the only fishery-independent data used in ICCAT management. (LLM, conf=0.86)
Experimental — accuracy not yet measured
- Premisecitation
T. thynnus larvae in the Gulf are most often found at the Loop Current Frontal Zone and the boundaries of anticyclonic eddies.
“T. thynnus larvae in the Gulf are most often found at the Loop Current Frontal Zone and the boundaries of anticyclonic eddies.”
Quote in the paperNot a substantial claim1 of 2 sources checked- cites Muhling et al. 2010 source
- cites Lindo-Atichati et al. 2012 source
The Discussion reports that T. thynnus larvae were most often present at anticyclonic-feature boundaries and in Gulf common waters. It only suggests that densities within the Loop Current frontal zone may have exceeded those in the current’s main body; it does not establish the frontal zone as a location where the larvae were most often found. The Discussion also places much of their spawning habitat outside the Loop Current region of interest. (LLM, conf=0.87)
Experimental — accuracy not yet measured
- Findingown data
For seven of the eight taxa examined, the highest abundances were in S-10 samples.
“Highest abundances for seven of eight taxa were in S-10 samples”
Quote in the paperSubstantial claim - Findingown data
Net type was a significant factor in assessing abundance and length for all taxa in PERMANOVA of net type and time of sampling (day/night).
“Permutational multivariate analysis of variance (PERMANOVA) of net type and time of sampling (day/night) indicated that net type was a significant factor in assessing abundance and length for all taxa.”
Quote in the paperSubstantial claim - Findingreasoning
T. thynnus did not show a consistent presence within the upper 50 m as seen in K. pelamis and other Thunnus.
“In particular, T. thynnus did not show a consistent presence within the upper 50 m as seen in K. pelamis and other Thunnus.”
Quote in the paperNot a substantial claim - Findingown data
The largest annual abundances for Istiophoridae and E. alleteratus were from bongo samples (~ 1-2 fold higher).
“The largest annual abundances for Istiophoridae and E. alleteratus were from bongo samples (~ 1-2 fold higher)”
Quote in the paperNot a substantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
Only K. pelamis and other Thunnus spp. larvae were consistently present in all depth bins to 50 m.
“Only K. pelamis and other Thunnus spp.larvae were consistently present in all depths bins to 50 m.”
Quote in the paperNot a substantial claim - Findingown data
For T. thynnus specifically, the largest annual abundance was at least 1.5 times greater for S-10 samples than for any other net-type.
“For T. thynnus specifically, the largest annual abundance was at least 1.5 times greater for S-10 samples than for any other net-type (Fig. 3).”
Quote in the paperNot a substantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
Only a difference of 0.0014 larvae m -3 was found for neuston samples.
“Only a difference of 0.0014 larvae m -3 was found for neuston samples (Fig. 5).”
Quote in the paperNot a substantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingnone given
T. thynnus, K. pelamis, and the other Thunnus taxa all displayed higher mean abundances between 10 and 20 m.
“T. thynnus, K. pelamis, and the other Thunnus taxa all displayed higher mean abundances between 10 and 20 m.”
Quote in the paperNot a substantial claim - Findingown data
The greatest abundances for T. thynnus, K. pelamis, and other Thunnus spp. were found shallower than for Auxis spp. and E. alleteratus.
“The greatest abundances for T. thynnus, K. pelamis, and other Thunnus spp.were found shallower than for Auxis spp.and E. alleteratus.”
Quote in the paperNot a substantial claim - Findingown data
Annual combined taxa abundances for S-10 samples between 2010 and 2011 were higher than that from bongo or neuston samples between 1990 and 2011.
“Annual combined taxa abundances for S-10 samples between 2010 and 2011 were higher than that from bongo or neuston samples between 1990 and 2011.”
Quote in the paperSubstantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
MOCNESS samples showed the highest scombrid abundance between the surface and 20 m.
“MOCNESS samples confirm highest scombrid abundance between the surface and 20 m.”
Quote in the paperNot a substantial claim - Findingown data
Mean combined taxa abundance for any of the eight taxa from the combined 2010 and 2011 survey data was higher in S-10 samples.
“Mean combined taxa abundance and the percentage of positive stations for any of the eight taxa from the combined 2010 and 2011 survey data were higher in S-10 samples (Figs.4a and 4b).”
Quote in the paperSubstantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
S-10 samples yielded higher numbers of positive stations for any of the eight taxa: 87% of positive stations versus 56% and 52% with bongo and neuston nets, respectively.
“S-10 samples also yielded higher numbers of positive stations for any of the eight taxa: 87% of positive stations versus 56% and 52% with bongo and neuston nets, respectively.”
Quote in the paperSubstantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingnone given
T. thynnus was found in higher numbers within shallower depths at night.
“T. thynnus was found in higher numbers within shallower depths at night.”
Quote in the paperNot a substantial claim - Findingcitation
Our results for K. pelamis coincide with those of Hare et al. (2001).
“Our results for this species coincide with those of Hare et al. (2001).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites Hare et al. (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Findingreasoning
T. thynnus exhibited more compressed vertical and horizontal distributions in the Gulf of Mexico than K. pelamis and other Thunnus taxa.
“In contrast to K. pelamis and other Thunnus taxa, T. thynnus exhibited more compressed vertical and horizontal distributions in the Gulf of Mexico.”
Quote in the paperNot a substantial claim - Findingown data
The largest annual combined taxa abundance from S-10 samples (0.133 ± 0.043 larvae m -3 ) was at least 2.1 times greater than any combined taxa abundance of bongo or neuston samples.
“The largest annual combined taxa abundance from S-10 samples (0.133 ± 0.043 larvae m -3 ) was at least 2.1 times greater than any combined taxa abundance of bongo or neuston samples.”
Quote in the paperSubstantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
The mean combined taxa abundance (0.156 ± 0.05 larvae m -3 ) obtained from S-10 samples was ~3-to 10fold higher than maximum values from the other two nets.
“The mean combined taxa abundance (0.156 ± 0.05 larvae m -3 ) obtained from S-10 samples was ~3-to 10fold higher than maximum values from the other two nets (Fig. 3).”
Quote in the paperSubstantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingnone given
Most instances of larvae greater than 15 mm were found among the Xiphiidae, Istiophoridae, and Coryphaenidae.
“Most instances of larvae greater than 15 mm were found among the Xiphiidae, Istiophoridae, and Coryphaenidae.”
Quote in the paperNot a substantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
Individually, five of the eight taxa had largest annual abundances in S-10 samples, compared with annual abundances for each taxon in either bongo or neuston samples.
“Individually, five of the eight taxa had largest annual abundances in S-10 samples, compared with annual abundances for each taxon in either bongo or neuston samples.”
Quote in the paperSubstantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
The percentage of positive stations for any of the eight taxa from the combined 2010 and 2011 survey data was higher in S-10 samples.
“Mean combined taxa abundance and the percentage of positive stations for any of the eight taxa from the combined 2010 and 2011 survey data were higher in S-10 samples (Figs.4a and 4b).”
Quote in the paperSubstantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
Mean combined taxa abundance was greater during nighttime samples for all net types.
“Mean combined taxa abundance was greater during nighttime samples for all net types (Fig. 5).”
Quote in the paperNot a substantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingown data
A two-factor PERMANOVA test on composition of the eight taxa at stations indicated net type (p = 0.001), as the only significant explanatory variable.
“A two-factor PERMANOVA test on composition of the eight taxa at stations indicated net type (p = 0.001), as the only significant explanatory variable (Table 2).”
Quote in the paperSubstantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
- Findingnone given
MOCNESS samples showed the largest abundances of some scombrid taxa below the 10 m maximum sampling depth of the S-10 net.
“MOCNESS samples showed the largest abundances of some scombrid taxa below the 10 m maximum sampling depth of the S-10 net.”
Quote in the paperSubstantial claim - Premisecitation
Larger fish would exceed the average length expected for larvae between 1 and 7 days in age typically collected by bongo nets with 0.335 mm mesh.
“Larger fish would exceed the average length expected for larvae between 1 and 7 days in age typically collected by bongo nets with 0.335 mm mesh (Brothers et al. 1983;Oxenford and Hunte 1983;Scott et al. 1993;Govoni et al. 2003;Ingram et al. 2010;Rooker et al. 2012).”
Quote in the paperSubstantial claim0 of 3 sources checked- cites Brothers et al. 1983
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites Oxenford and Hunte 1983
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites Scott et al. 1993
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
A significant but under-studied potential bias in quantitative estimates of abundance of planktonic organisms is the patchy spatial and temporal distributions of their populations.
“A significant but under-studied potential bias in quantitative estimates of abundance of planktonic organisms is the patchy spatial and temporal distributions of their populations (Barnes and Marshall 1951;Cushing 1962;Wiebe and Holland 1968;Johnson and Morse 1994).”
Quote in the paperSubstantial claim0 of 3 sources checked- cites Barnes and Marshall 1951 source
- cites Cushing 1962
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites Wiebe and Holland 1968
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Interpretationown data
The S-10 net was more effective than standard SEAMAP bongo and neuston nets for sampling larvae of the targeted taxa.
“and that the S-10 net was more effective than standard SEAMAP bongo and neuston nets.”
Quote in the paperSubstantial claim - Interpretationreasoning
Obtaining accurate data on the distributions of the targeted taxa depends highly on the sampling effectiveness of the particular gear used in surveys.
“Thus, it is necessary to obtain accurate data regarding their distributions, which will depend highly on the sampling effectiveness of the particular gear used in surveys.”
Quote in the paperSubstantial claim - Interpretationown data
Sampling effectiveness strongly depends on the depth fished by the net.
“Our results show sampling effectiveness strongly depends on the depth fished by the net”
Quote in the paperSubstantial claim - Interpretationreasoning
The vertical differences in epipelagic larvae distributions is likely not due to a single mechanism, but several processes acting over complex hydrographic conditions in the Gulf of Mexico.
“The vertical differences in epipelagic larvae distributions is likely not due to a single mechanism, but several processes acting over complex hydrographic conditions in the Gulf of Mexico.”
Quote in the paperNot a substantial claim
- Classified as probably not a substantial claim. 17
- May combine two claims. 14
- The quote only partly states this claim. 1
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationSome scombrid species have shown significantly different vertical distributions in response to highly selective predation.
“Some scombrid species have shown significantly different vertical distributions in response to highly selective predation (Davis et al. 1990;Llopiz et al. 2010), and similar processes could be affecting the vertical distributions in the Gulf of Mexico.”
Quote in the paperNot a substantial claim1 of 2 sources checked- cites Davis et al. 1990 source
The Abstract and Diel vertical distribution section report different daytime depth patterns among the three tuna species. The paper does not establish that these differences are a response to highly selective predation; it discusses feeding as a possible explanation and mentions predator avoidance only as a general hypothesis in the Introduction. No page numbers are available in our copy. (LLM, conf=0.87)
Experimental — accuracy not yet measured - cites Llopiz et al. 2010 source
May combine two claims.
PremisecitationThe Loop Current Frontal Zone and anticyclonic eddy boundaries are associated with off-shelf waters and lower surface chlorophyll concentrations.
“These regions are associated with off-shelf waters and lower surface chlorophyll concentrations (Muhling et al. 2010;2012;Lindo-Atichati et al. 2012).”
Quote in the paperNot a substantial claim1 of 3 sources checked- cites Muhling et al. 2010 source
- cites Muhling et al. 2012
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites Lindo-Atichati et al. 2012 source
The spatial-variability section defines the Loop Current front using sea-surface height, and the Discussion describes larval densities near anticyclonic boundaries. Neither passage links those regions to off-shelf waters or lower surface chlorophyll concentrations; searches for those terms found no such finding in our copy. The indexed passages provide no page numbers. (LLM, conf=0.73)
Experimental — accuracy not yet measured
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationPrevious studies have associated increased larval pelagic abundance with specific mesoscale features.
“Previous studies have associated increased larval pelagic abundance with some of these specific mesoscale features (Richardson et al. 2009;Muhling et al. 2010;Rooker et al. 2012;Lindo-Atichati et al. 2012).”
Quote in the paperNot a substantial claim1 of 3 sources checkedProbably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationOnly samples conducted during May within the standard grid are used in the bluefin tuna larval index, which tunes estimates of spawning stock biomass for the western Atlantic population.
“Only samples conducted during May, within the standard grid, are used in the bluefin tuna larval index, which tunes estimates of spawning stock biomass for the western Atlantic population (Ingram et al. 2010).”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites Ingram et al. 2010 source
The Methodology (p. not available) says samples from April 20 through May 31 were used to index larval abundance, contrary to the claim that only May samples were used. It describes a usual sampling grid and a defined survey area, but does not establish a restriction to samples within a “standard grid.” The Discussion (p. not available) confirms that the larval index was used in a stock assessment model as an indicator of spawning stock biomass. (LLM, conf=0.90)
Experimental — accuracy not yet measured
Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).
PremisecitationSome sampling gear may become obsolete as issues with capture efficiencies are discovered and improvements are made.
“However, some gear may become obsolete as issues with capture efficiencies are discovered and improvements are made (Johnson and van Densen 2007).”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites Johnson and van Densen 2007 source
The Industry-based surveys section says standardized sampling gear may be outdated compared with gear used by commercial vessels. It does not say this happens because capture-efficiency problems are discovered or improvements are made. (LLM, conf=0.84)
Experimental — accuracy not yet measured
May combine two claims.
InterpretationcitationEarlier studies (Davis et al. 1990; Boehlert and Mundy 1994) examined vertical distributions over sampling intervals larger than 10 m and may have missed discrete differences in abundance between the surface and 50 m.
“The earlier studies (Davis et al. 1990;Boehlert and Mundy 1994), however, examined vertical distributions over sampling intervals larger than 10 m, and may have missed discrete differences in abundance between the surface and 50 m.”
Quote in the paperNot a substantial claim2 of 2 sources checkedMay combine two claims. The quote only partly states this claim.
FindingreasoningThe other scombrid taxa showed similar behavior to T. thynnus, with the exception of K. pelamis.
“The other scombrid taxa showed similar behavior, with the exception of K. pelamis.”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown dataThe largest annual abundances from S-10 samples for T. thynnus, Auxis spp., K. pelamis, Coryphaena spp., and other Thunnus spp., on average were 180% that of bongo samples, and 316% that of neuston samples.
“The largest annual abundances from S-10 samples for these taxa, T. thynnus, Auxis spp., K. pelamis, Coryphaena spp., and other Thunnus spp., on average were 180% that of bongo samples, and 316% that of neuston samples.”
Quote in the paperSubstantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
May combine two claims.
Findingown dataThe largest annual abundances for X. gladius were from neuston samples, and were on average 140% that of the S-10 net.
“while that of X. gladius were from neuston samples, and were on average 140% that of the S-10 net.”
Quote in the paperNot a substantial claim- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
May combine two claims.
Findingown dataAuxis spp. and E. alleteratus larvae both showed highest mean abundances between 20 and 40 m, deeper than the other taxa, but like T. thynnus, were not consistent in all depth bins.
“Auxis spp.and E. alleteratus larvae both showed highest mean abundances between 20 and 40 m, deeper than the other taxa, but like T. thynnus, were not consistent in all depth bins.”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown dataThe largest difference between day and night combined taxa abundance for each gear was found for bongo samples (0.041 larvae m -3 ), followed by S-10 samples (0.028 larvae m -3 ).
“The largest difference between day and night combined taxa abundance for each gear was found for bongo samples (0.041 larvae m -3 ), followed by S-10 samples (0.028 larvae m -3 ).”
Quote in the paperNot a substantial claim- The authors state this as an assumption: Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
- Rests on an assumption: The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
Probably not a substantial claim: may not pass S4 (based). May combine two claims.
Findingnone givenThe S-10 net was the most effective net for collecting individual taxa and the assemblage of ichthyoplankton studied.
“The S-10 net was the most effective net for collecting individual taxa and the assemblage of ichthyoplankton studied.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.
Findingnone givenSeveral mesopelagic species are also caught with the S-10 net, but for most of these, the bongo net may be more effective.
“Several of these mesopelagic species are also caught with the S-10 net, but for most of these, the bongo net may be more effective.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.
InterpretationreasoningThe decreased abundance of Auxis spp. and E. alleteratus at the surface may also be due to competition with the other larger scombrid taxa, or larval cannibalism within their own species when large patches are present.
“The decreased abundance of Auxis spp.and E. alleteratus at the surface may also be due to competition with the other larger scombrid taxa, or larval cannibalism within their own species when large patches are present.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.
InterpretationreasoningTheir increased abundances at deeper layers of the upper 50 m may be adaptations in response to, or simply a result of, competition from a higher concentration of predators at the surface in the more productive waters.
“Their increased abundances at deeper layers of the upper 50 m in the water column may be adaptations in response to, or simply a result of, competition from a higher concentration of predators at the surface in the more productive waters.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationThe S-10 net methodology was developed and successfully tested by Spanish researchers as an improved sampling tool for collecting larval bluefin tuna in the Mediterranean Sea.
“The S-10 net methodology was developed and successfully tested by Spanish researchers as an improved sampling tool for collecting larval bluefin tuna in the Mediterranean Sea (F.Alemany, pers.comm.2009).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites F.Alemany, pers.comm.2009
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Study design and conductown dataS-10 net abundance data were not available for one of the 165 stations because the volume filtered was not recorded; therefore the abundance data from S-10 samples includes 164 of the 165 stations.
“S-10 net abundance data were not available for one of the 165 stations because the volume filtered was not recorded; therefore the abundance data from S-10 samples includes 164 of the 165 stations.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationcitationSimilar processes (selective predation) could be affecting the vertical distributions in the Gulf of Mexico.
“Some scombrid species have shown significantly different vertical distributions in response to highly selective predation (Davis et al. 1990;Llopiz et al. 2010), and similar processes could be affecting the vertical distributions in the Gulf of Mexico.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).
InterpretationreasoningThese two scombrid taxa appear to have evolved broader spawning habitat preferences to increase reproductive success.
“These two scombrid taxa appear to have evolved broader spawning habitat preferences to increase reproductive success.”
Quote in the paperNot a substantial claimClassified as probably not a substantial claim.
PremisecitationFishery-independent surveys are used to avoid biases associated with data from commercial or recreational fisheries.
“Fishery-independent surveys are used to avoid biases associated with data from commercial or recreational fisheries (Sissenwine et al. 1983;Gunderson 1993).”
Quote in the paperSubstantial claim0 of 2 sources checked- cites Sissenwine et al. 1983
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites Gunderson 1993
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).
Premisenone givenThe historical spring SEAMAP bongo ichthyoplankton database contains data on over 500 taxa.
“The historical spring SEAMAP bongo ichthyoplankton database contains data on over 500 taxa.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationcitationOntogenetic differences resulting from a prolonged spawning season in the more tropical scombrids could lead to increased mobility resulting in the ability to better exploit the water column.
“It is also possible that ontogenetic differences resulting from a prolonged spawning season in the more tropical scombrids could lead to increased mobility resulting in the ability to better exploit the water column (Hare et al. 2001).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites Hare et al. 2001
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Rests on an assumption: The other more tropical and smaller scombrid species display a wider range of hydrographic conditions and a longer spawning season than T. thynnus.
Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.
Interpretationnone givenLarvae may also be moved vertically in the water column as a result of advection due to physical processes, sinking due to gravity, or the stability given the relation of body density to that of the surrounding water.
“Larvae may also be moved vertically in the water column as a result of advection due to physical processes, sinking due to gravity, or the stability given the relation of body density to that of the surrounding water.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S4 (based).
Premisenone givenThe bongo net continues a consistent time series that spans over 30 years.
“The bongo net also continues a consistent time series that spans over 30 years.”
Quote in the paperNot a substantial claim
The paper relies on this without support.
For medium to large epipelagic fish, larvae are often restricted to the upper water column, and high mobility can lead to important differences in abundance estimations due to different sampling methodologies.
“For medium to large epipelagic fish specifically, larvae are often restricted to the upper water column, and high mobility can lead to important differences in abundance estimations of the population due to different sampling methodologies.”
The paper relies on this without support.
Historical projections of adult Atlantic bluefin tuna spawning stock biomass in the Gulf of Mexico are informed using fisheries-independent data from SEAMAP.
“Historical projections of adult Atlantic bluefin tuna (Thunnus thynnus) spawning stock biomass in the Gulf of Mexico are informed using fisheries-independent data from the Southeast Area Mapping and Assessment Program (SEAMAP).”
The paper relies on this without support.
A primary objective of SEAMAP surveys is to collect the fisheries-independent data used to develop an annual index of larval abundance for the western population of Atlantic bluefin tuna.
“A primary objective of these surveys is to collect the fisheriesindependent data used to develop an annual index of larval abundance for the western population of Atlantic bluefin tuna.”
The authors state this as an assumption.
Samples from 2010 and 2011 can be treated as independent observations of the same statistical population.
“To create a more robust dataset, we combined results from 2010 and 2011, and treated samples as independent observations of the same statistical population (Table 1).”
The paper relies on this without support.
Larger fish are not often caught due to avoidance of the net.
“The larger fish are not often caught due to avoidance of the net.”
The authors state this as an assumption.
Larvae of all taxa presented in this study are concentrated in the upper layers of the water column.
“Larvae of all taxa presented in this study are expected to be concentrated in the upper layers of the water column, and we use the vertical distribution of the five scombrid taxa as a general example of larval fish displaying this behavior.”
The paper relies on this without support.
The eight selected taxa have stable identification at the taxonomic level throughout the SEAMAP time series.
“due to stable identification at the taxonomic level throughout the SEAMAP time series”
The paper relies on this without support.
The eight selected taxa may interact with larval bluefin tuna in their spawning habitat.
“because they may interact with larval bluefin tuna in their spawning habitat”
The paper relies on this without support.
The other more tropical and smaller scombrid species display a wider range of hydrographic conditions and a longer spawning season than T. thynnus.
“In contrast, the other more tropical and smaller scombrid species display a wider range of hydrographic conditions and a longer spawning season, than T. thynnus.”
The paper relies on this without support.
Auxis spp. and E. alleteratus are smaller more coastal species found mostly in relatively cooler continental shelf waters, with higher chlorophyll concentrations.
“These are both smaller more coastal species found mostly in relatively cooler continental shelf waters, with higher chlorophyll concentrations.”
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
More other Thunnus larvae measured than collected in bongo samples
MinorTable 1 lists 95 other Thunnus specimens in bongo samples but says 98 were measured. The number measured cannot exceed the number collected.
“| | Number of specimens | 1964 | 95 | 181 | 221 |”
“| | Number measured | 941 | 98 | 178 | - |”
Neuston cannot have the lowest swordfish abundance
MinorThe paper says neuston had the lowest abundance for every taxon except Istiophoridae, but it also says swordfish (X. gladius) were absent from bongo samples. A positive neuston catch cannot be lower than a zero bongo catch.
“The neuston net offered the lowest abundances for all taxa but Istiophoridae.”
“X.gladius was absent from bongo samples”
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Flagged first, then by citations
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Cited by
Sorted by citations
Reproduction and larval biology in tunas, and the importance of restricted area spawning grounds
Muhling, B. A., Lamkin, J. T., Alemany, F., García, A., Farley, J., Ingram, G. W., Berastegui, D. A., Reglero, P., & Carrion, R. L. (2017) · Reviews in Fish Biology and Fisheries · doi:10.1007/s11160-017-9471-4 · Cited by 82 · see citing works
“Although larval tunas can show slightly different vertical distributions in the upper water column (Davis et al. 1990a; Habtes et al. 2014; Llopiz et al. 2010), this does not seem to be the driver of dietary differences among species.”
BackgroundInfluentialSelf-citationDomingues, R. M., Goni, G. J., Bringas, F. G., Muhling, B. A., Lindo‐Atichati, D., & Walter, J. F. (2016) · Fisheries Oceanography · doi:10.1111/fog.12152 · Cited by 48 · see citing works
“This new net targets the upper mixed layer, where bluefin tuna larvae are believed to be more abundant (Muhling et al., 2012; Habtes et al., 2014).”
BackgroundSelf-citationLaiz-Carrión, R., Gerard, T., Uriarte, A., Malca, E., Quintanilla, J., Muhling, B., Alemany, F., Privoznik, S., Shiroza, A., Lamkin, J., et al. (2015) · PLoS ONE · doi:10.1371/journal.pone.0133406 · Cited by 44 · see citing works
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“1994; Kitchens and Rooker 2014), coinciding with further records by other authors (Wells and Rooker 2009; Habtes et al. 2014).”
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“…fishes at night, identifying these zooplanktivorous fishes as an important resource competitor for the neustonic dwelling species such as beloniforms or other pelagic species that spent their juvenile stages at this layer, e.g. gempylids (Nakamura and Parin 2001) or scombrids (Habtes et al. 2014).”
BackgroundAbundance and habitat associations of tuna larvae in the surface water of the Gulf of Mexico
Cornic, M., Smith, B. L., Kitchens, L. L., Bremer, J. R. A., & Rooker, J. R. (2017) · Hydrobiologia · doi:10.1007/s10750-017-3330-0 · Cited by 39 · see citing works
“This result is consistent with previous study that indicated no significant difference in density between neuston net and bongo net for T. thynnus and other Thunnus (Habtes et al., 2014).”
BackgroundResultInfluentialA drop in the ocean: Monitoring fish communities in spawning areas using environmental DNA
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Self-citationIdentifying pelagic fish eggs in the southeast Yucatan Peninsula using DNA barcodes
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“Two types of nets were used to collect the zooplankton: Neuston with a 0.947 mm mesh cloth size fitted on a 1 × 2 m rectangular aluminum frame, and a new sampling implement, Spanish Neuston S-10 with a 0.505 mm mesh size fitted on a 1 x 2 m rectangular aluminum frame (Habtes et al. 2014).”
MethodInfluentialCornic, M., & Rooker, J. R. (2018) · Fisheries Research · doi:10.1016/j.fishres.2017.12.015 · Cited by 35 · see citing works
“It has been observed that tuna catch can fluctuate between day/night and size of the larvae (Fortier and Harris, 1989; Davis et al., 1990; Boehlert and Mundy, 1994; Satoh et al., 2013; Habtes et al., 2014), which could have led to greater numbers of larvae caught at the end of the day.”
BackgroundMethodEvidence and patterns of tuna spawning inside a large no-take Marine Protected Area
Hernández, C., Witting, J. H., Willis, C., Thorrold, S., Llopiz, J., & Rotjan, R. (2019) · Scientific Reports · doi:10.1038/s41598-019-47161-0 · Cited by 32 · see citing works
Gerard, T., Lamkin, J., Kelly, T., Knapp, A., Laiz-Carrión, R., Malca, E., Selph, K., Shiroza, A., Shropshire, T. A., Stukel, M., et al. (2022) · Journal of Plankton Research · doi:10.1093/plankt/fbac038 · Cited by 28 · see citing works
Self-citationShiroza, A., Malca, E., Lamkin, J., Gerard, T., Landry, M., Stukel, M., Laiz-Carrión, R., & Swalethorp, R. (2021) · Journal of Plankton Research · doi:10.1093/plankt/fbab020 · Cited by 31 · see citing works
“Samples were taken with a dual 90-cm diameter bongo frame (bongo-90) equipped with 500-μ m synthetic nylon mesh nets by oblique hauls in the upper 25 m of the water column and towed at an average over-ground speed of 2.22 knots for 10 minutes (Laiz-Carrion et al ., 2013, 2015; Habtes et al. , 2014).”
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Hernández, C. M., Richardson, D. E., Rypina, I. I., Chen, K., Marancik, K. E., Shulzitski, K., & Llopiz, J. K. (2021) · Canadian Journal of Fisheries and Aquatic Sciences · doi:10.1139/cjfas-2020-0444 · Cited by 25 · see citing works
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Impacts of Climate Change on Pelagic Fish and Fisheries
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“They are restricted by daylight feeding and light penetration to the upper 10–20 m of surface waters (Davis et al., 1990a; Habtes et al., 2014), and will thereby directly experience the major projected consequences of climate forcing—warmer surface temperature, stratification-diminished productivity, and increased aci…”
BackgroundSelf-citationFine-scale horizontal distributions of multiple species of larval tuna off the Nansei Islands, Japan
Tawa, A., Kodama, T., Sakuma, K., Ishihara, T., & Ohshimo, S. (2019) · Marine Ecology Progress Series · doi:10.3354/meps13216 · Cited by 24 · see citing works
A database of marine larval fish assemblages in Australian temperate and subtropical waters
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“The use of similar nets, sampling methodologies and environmental variables can help to compare spawning areas while avoiding significant methodological issues [56,61].”
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FEEDING DYNAMICS OF ATLANTIC BLUEFIN TUNA (THUNNUS THYNNUS) LARVAE IN THE GULF OF MEXICO
Llopiz, J. K., Muhling, B. A., & Lamkin, J. T. (2015) · Cited by 16 · see citing works
Self-citationPelagic Habitat Partitioning of Late-Larval and Juvenile Tunas in the Oceanic Gulf of Mexico
Pruzinsky, N. M., Milligan, R., & Sutton, T. (2020) · Frontiers in Marine Science · doi:10.3389/fmars.2020.00257 · Cited by 12 · see citing works
Gatto, J. V., & Trexler, J. C. (2019) · Environmental Biology of Fishes · doi:10.1007/s10641-019-00856-9 · Cited by 13 · see citing works
Vertical distribution of larval Pacific bluefin tuna, Thunnus orientalis, in the Japan Sea
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Moore, J. A., Fenolio, D. B., Cook, A. B., et al. (2020) · Frontiers in Marine Science · doi:10.3389/fmars.2020.00169 · Cited by 12 · see citing works
Malca, E., Quintanilla, J., Gerard, T., Alemany, F., Sutton, T. T., García, A., Lamkin, J., & Laiz-Carrión, R. (2023) · Frontiers in Marine Science · doi:10.3389/fmars.2023.1233249 · Cited by 12 · see citing works
Self-citationChristiansen, H. M., Solomon, J. J., Switzer, T. S., et al. (2022) · Fisheries Research · doi:10.1016/j.fishres.2022.106234 · Cited by 10 · see citing works
Kodama, T., Tawa, A., Ishihara, T., & Tanaka, Y. (2022) · Progress in Oceanography · doi:10.1016/j.pocean.2022.102758 · Cited by 9 · see citing works
Bradley, D. L., Morey, K. C., Bourque, D. A., et al. (2022) · Environmental DNA · doi:10.1002/edn3.286 · Cited by 10 · see citing works
Cornic, M., & Rooker, J. (2021) · Journal of Marine Systems · doi:10.1016/j.jmarsys.2021.103524 · Cited by 8 · see citing works
“05 larvae 1000 m 3 (10–20 m, MOCNESS net) in this region (Habtes et al., 2014).”
BackgroundRypina, I., Dotzel, M. M., Pratt, L., Hernández, C., & Llopiz, J. (2021) · Progress in Oceanography · doi:10.1016/j.pocean.2021.102514 · Cited by 5 · see citing works
“This depth was chosen because field surveys suggest that bluefin larvae do not exhibit vertical migrations, and that 10 m corresponds to the mean depth of larval distributions observed in the field (Habtes et al., 2014; Reglero et al., 2018a).”
Fey, D. P., & Szkudlarek-Pawelczyk, A. (2021) · Fisheries Research · doi:10.1016/j.fishres.2021.106165 · Cited by 5 · see citing works
Characterizing larval swordfish habitat in the western tropical North Atlantic
Suca, J. J., Rasmuson, L. K., Malca, E., Gerard, T., & Lamkin, J. T. (2018) · Fisheries Oceanography · doi:10.1111/fog.12249 · Cited by 4 · see citing works
“80 Plankton tows were conducted at each station undulating a 1 x 2m 0.505 mm mesh net fitted with 81 a flowmeter (2030R, General Oceanics, Inc) between the surface and 10 m depth for 10 minutes 82 (hereafter referred to as S-10; Habtes et al., 2014).”
MethodInfluentialSelf-citationCzaja, R. E., Lestrade, O., Zapfe, G. A., Malca, E., & Muhling, B. A. (2025) · Ecography · doi:10.1002/ecog.07965 · Cited by 3 · see citing works
Self-citationThe score test for independence of two marginal Poisson variables
Bower, R., Hussey, J. R., Zhang, J., et al. (2018) · Communications in Statistics Case Studies Data Analysis and Applications · doi:10.1080/23737484.2018.1536864 · Cited by 2 · see citing works
Self-citationOttmann, D., Reglero, P., Alemany, F., Álvarez‐Berastegui, D., Martín, M., & Fiksen, Ø. (2022) · Limnology and Oceanography Letters · doi:10.1002/lol2.10241 · Cited by 2 · see citing works
“2c), and real predation may exceed the values reported here because piscivorous BFT are likely underestimated due to net avoidance (Habtes et al. 2014).”
BackgroundDistribution, growth, and transport of larval fishes and implications for population dynamics
Hernández, C. M. (2020) · doi:10.1575/1912/26374 · Cited by 1 · see citing works
Multiple nets better explain the diversity of marine fish larvae in equatorial environments
Costa, A. C. P., Júnior, J. P. V. A., Garcia, T. M., et al. (2024) · Marine Biodiversity · doi:10.1007/s12526-023-01402-8 · Cited by 1 · see citing works
“These problems depend on both the type of gear and size of the mesh chosen for sample collection (Habtes et al. 2014).”
Quintanilla-Hervás, J. M., Tanaka, S., Borrego‐Santos, R., Malca, E., Laiz‐Carrión, R., Robert, D., & Takasuka, A. (2025) · Fisheries Oceanography · doi:10.1111/fog.70018 · Cited by 1 · see citing works
Age and Growth of Larval Atlantic Bluefin Tuna, Thunnus Thynnus from The Gulf of Mexico.
Malca, E. (2014) · Cited by 1 · see citing works
Evolving from Fry Fisheries to Early Life Research on Pelagic Fish Resources
Garcı́a, A., Laiz‐Carrión, R., Cortés, D., Quintanilla-Hervás, J. M., Uriarte, A., Ramı́rez, T., Yebra, L., Mercado, J. M., García‐Gómez, C., Sammartino, S., et al. (2021) · Springer eBooks · doi:10.1007/978-3-030-65516-7_13 · Cited by 1 · see citing works
Volosnikov, G. I., & Ерофеева, А. А. (2024) · Природное и историко-культурное наследие Сибири. · doi:10.25713/hs.2024.2.3.002
Basilone, G., Ferreri, R., Bonanno, A., et al. (2025) · Oceans · doi:10.3390/oceans6020031
Malca, E., Johnstone, C., Laiz-Carrión, R., Quintanilla, J., Borrego-Santos, R., Swalethorp, R., Carr, M., Pérez-Sánchez, T., Bremer, J. A. A., Geddes, K., et al. (2026) · Deep-sea research. Part II, Topical studies in oceanography · doi:10.1016/j.dsr2.2026.105643
Self-citation
- Authors
- Habtes, S., Muller‐Karger, F. E., Roffer, M. A., Lamkin, J. T., & Muhling, B. A.
- Affiliations
- University of South Florida (US)
- Roffer’s Ocean Fishing Forecasting Service (US)
- National Oceanic and Atmospheric Administration (US)
- Corresponding author
- Habtes, Sennai
- Venue
- Limnology and Oceanography: Methods
- Publisher
- Wiley
- Published
- 2014-02
- Volume
- 12
- Issue
- 2
- Pages
- 86-101
- ISSN
- 1541-5856 (ISSN-L)
- OpenAlex
- W2093233373
- Semantic Scholar
- 2c0058262b7f8fb547f5d2fa2c37582f5c9b813c
- Cited by
- 50
- References
- 50
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 2 · 2023: 1 · 2022: 7 · 2021: 8 · 2020: 7 · 2019: 4 · 2018: 7 · 2017: 4 · 2016: 2 · 2015: 3 · 2014: 1
- FWCI
- 2.71
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Limnology and Oceanography Methods (publishedVersion)
- Digital Commons - University of South Florida (University of South Florida) (submittedVersion)
- Funders
- National Aeronautics and Space Administration (NNX08AL06G, NNX11AP76G)
- National Oceanic and Atmospheric Administration
- National Marine Fisheries Service
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
- Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
- Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ichthyology and Marine Biology
- Keywords
- ichthyoplankton, bongo net, sampling gear comparison, Thunnus thynnus, scombrids, vertical distribution, larval abundance, larval length, Gulf of Mexico, SEAMAP, MOCNESS
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-16.
Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-16.
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