Comparative study of spatial distribution patterns of the early stages of anchovy and pilchard in the NW Mediterranean Sea
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Anchovy and pilchard are the most abundant pelagic species in the NW Mediterranean Sea.They spawn in different seasons, subject to different environmental conditions: anchovy in summer, when the water column is stratified; pilchard in winter, when the water column is vertically homogeneous.The spatial distribution patterns of eggs and larvae of these 2 species are compared in relation to the main productive features in the region during their respective spawning seasons.The study was performed on the continental shelf off the Ebro River (NW Mediterranean) during June (for anchovy) and February (for pilchard).Sampling comprised a horizontal survey, designed to locate patches of eggs or larvae, followed by a Lagrangian experiment using stratified hauls to study the vertical distributions at different times of day in the water parcel tracked.While pelagic eggs and larvae of both species were present in the upper 70 m of the water column, we recorded differences in the preferential vertical distribution and migration patterns.Maximum concentrations of anchovy eggs and larvae were located in the upper 20 m; pilchard concentrations extended down to 10-40 m.Vertical displacements by the larger larvae at night occurred in both species, but with opposite patterns: anchovy larvae tended to aggregate in the upper 10 m, pilchard larvae exhibited greater dispersal at night, with a preference for levels below 30 m.
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Previous studies suggest that the vertical distribution of anchovy and sardine eggs is variable but in most cases a fraction of the eggs is always present in the first 5 meters.
“Previous studies (Coombs et al., 1985, Olivar et al., 2001, Boyra 20 et al., 2003, Coombs et al., 2003) suggest that the vertical distribution of anchovy and sardine eggs is variable but in most cases a fraction of the eggs is always present in the first 5 meters”
From Modelling potential spawning habitat of sardine ( <i>Sardina pilchardus</i> ) and anchovy ( <i>Engraulis encrasicolus</i> ) in the Bay of Biscay (2007) · cites this paper as Olivar et al., 2001
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Davis, T., Jenkins, G., & Young, J. (1990) · Marine Ecology Progress Series · doi:10.3354/meps059063 · Cited by 69 · see citing works
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Research works printed but not linked: 1
- Salat J, García M, Cruzado A, Palanques A, Arin L, Gomis D, Guillén J, de León A, Puigdefábregas J, Sospedra J, Velas- quez Z (in press) Seasonal changes of water mass struc- ture and shelf-slope exchanges at the Ebro Shelf. Cont Shelf Res
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PLANQUE, B., BELLIER, E., & LAZURE, P. (2007) · Fisheries Oceanography · doi:10.1111/j.1365-2419.2006.00411.x · Cited by 184 · see citing works
- Authors
- Olivar, M., Salat, J., & Palomera, I.
- Affiliations
- Institut de Ciències del Mar (ES)
- ORCID
- Venue
- Marine Ecology Progress Series
- Publisher
- Inter-Research Science Center
- Published
- 2001
- Volume
- 217
- Pages
- 111-120
- ISSN
- 0171-8630 (ISSN-L)
- 1616-1599
- OpenAlex
- W2158883187
- Cited by
- 144
- References
- 1
- Citations by year
- 2026: 3 · 2025: 4 · 2024: 3 · 2023: 2 · 2022: 5 · 2021: 5 · 2020: 7 · 2019: 1 · 2018: 7 · 2017: 3 · 2016: 6 · 2015: 10 · 2014: 5 · 2013: 9 · 2012: 8
- FWCI
- 4.44
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Marine Ecology Progress Series (publishedVersion)
- DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Cephalopods and Marine Biology
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Keywords
- anchovy, pilchard, spatial distribution, vertical distribution, diel vertical migration, spawning season, water column stratification, NW Mediterranean
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