Growth and survival of first-feeding spotted wolffish (Anarhichas minor Olafsen) at various temperature regimes: Effect of temperature on spotted wolffish growth
Open accessAbstract
In order to define temperature regimes that could benefit successful production of spotted wolffish (Anarhichas minor) juveniles, experiments with offspring from two different females were carried out. The larvae were fed a new formulated feed or a commercial start-feed for marine fish, both of which have given high survival rates. In the first experiment newly hatched larvae were fed at constant 6 °C, 8 °C, 10 °C and 12 °C as well as at ambient seawater temperature (2.9–4.5 °C) during 63 days. High survival, 90% to 96%, was registered at ambient and most constant temperature regimes, whereas in the 12 °C groups survival was reduced to 80%. Growth rate (SGR) was very low, 1.8% day−1, at the low ambient temperatures. Growth rate was positively correlated with temperature and varied between 3.1% day−1 to 4.7% day−1, from 6 °C to 12 °C. In the second experiment, set up to include potential detrimental temperatures and study beneficial effects of a more restricted, elevated first-feeding temperature regime, the larvae were fed at constant 8 °C, 10 °C, 12 °C, 14 °C and 16 °C until 30 days post hatch, followed by constant 8 °C for the next 33 days. In this experiment, low survival, 25% and 2.0%, was registered at 63 days post hatch when larvae were reared initially at 14 °C and 16 °C respectively. The survival of the larvae at the other temperature regimes varied from 47% to 64%, highest survival rate (64%) was found at 8 °C. The lowest specific growth rate, 2.6% day−1, was noted in the 16 °C group. At constant 8 °C to 14 °C (regulated to 8 °C), the SGR varied from 4.45% day−1 to 5.13% day−1. The larvae grew faster in the experiment when initially comparable temperatures (8 °C, 10 °C and 12 °C) were regulated to constant 8 °C after 30 days compared with the first experiment where feeding was carried out at the same constant temperatures (8 °C, 10 °C and 12 °C) during the whole experimental period.
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Serious reduction in growth and health of Atlantic wolffish occurs at 15°C.
“data indicate that serious reduction in growth and health of Atlantic wolffish occurs at 15°C (Árnason et al., 2019; Falk‐Petersen et al., 1999; Hansen & Falk‐Petersen, 2002).”
From Insights into thermal sensitivity: Effects of elevated temperature on growth, metabolic rate, and stress responses in Atlantic wolffish (<i>Anarhichas lupus</i>) (2025) · cites this paper as Hansen & Falk‐Petersen, 2002
The Results report sharply lower survival at 14°C and 16°C, and the Discussion reports inhibited growth at 16°C—but these findings concern first-feeding spotted wolffish larvae, not Atlantic wolffish. The paper did not test 15°C, and growth remained high through 14°C, so it does not establish a serious reduction in both growth and health of Atlantic wolffish at 15°C. (LLM, conf=0.88)
Experimental — accuracy not yet measuredElevated temperature has detrimental effects on both wolffish species.
“Elevated temperature has detrimental effects on both wolffish species (Árnason et al., 2019; Falk‐Petersen et al., 1999; Hansen & Falk‐Petersen, 2002; McCarthy et al., 1998; Moksness, 1994; Pavlov & Moksness, 1997; Rindorf et al., 2020).”
From Insights into thermal sensitivity: Effects of elevated temperature on growth, metabolic rate, and stress responses in Atlantic wolffish (<i>Anarhichas lupus</i>) (2025) · cites this paper as Hansen & Falk‐Petersen, 2002
The Results and Discussion report that high temperatures reduced survival of first-feeding spotted wolffish larvae, and that growth was inhibited at 16°C. This paper studies spotted wolffish, not both wolffish species, so it does not establish the claim for the other species. (LLM, conf=0.88)
Experimental — accuracy not yet measuredGrowth of juvenile Atlantic wolffish was reduced at 15°C.
“Consistent with earlier research (Árnason et al., 2019; Falk‐Petersen et al., 1999; Hansen & Falk‐Petersen, 2002), we demonstrated a reduction in growth at 15°C.”
From Insights into thermal sensitivity: Effects of elevated temperature on growth, metabolic rate, and stress responses in Atlantic wolffish (<i>Anarhichas lupus</i>) (2025) · cites this paper as Hansen & Falk‐Petersen, 2002
The Results and Discussion report inhibited growth at 16°C in first-feeding spotted wolffish larvae. They do not report a 15°C treatment or a finding for juvenile Atlantic wolffish, so the cited paper supports only the broader point that growth can decline at high temperatures. (LLM, conf=0.87)
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Cited by
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A review of the culture potential of spotted wolffish Anarhichas minor Olafsen
Foss, A., K. Imsland, A., Falk-Petersen, I.-B., & Øiestad, V. (2004) · Reviews in Fish Biology and Fisheries · doi:10.1007/s11160-004-8360-9 · Cited by 58 · see citing works
Self-citationHinchcliffe, J., Roques, J. A. C., Ekström, A., Hedén, I., Sundell, K., Sundh, H., Sandblom, E., Björnsson, B. T., & Jönsson, E. (2025) · Journal of Fish Biology · doi:10.1111/jfb.16017 · Cited by 11 · see citing works
- Authors
- Hansen, T. K., & Falk-Petersen, I.-B.
- Affiliations
- UiT The Arctic University of Norway (NO)
- Venue
- Aquaculture Research
- Publisher
- Hindawi Limited
- Published
- 2002-10-23
- Volume
- 33
- Issue
- 14
- Pages
- 1119-1127
- ISSN
- 1355-557X (ISSN-L)
- OpenAlex
- W1963603626
- Cited by
- 37
- References
- 0
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 2 · 2021: 2 · 2019: 1 · 2018: 2 · 2017: 1 · 2014: 2 · 2013: 1 · 2012: 2
- FWCI
- 4.52
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Aquaculture Research (publishedVersion)
- Funders
- Norges Forskningsråd
- Topics
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Aquaculture Nutrition and Growth
- Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Fish Biology and Ecology Studies
- Keywords
- spotted wolffish, Anarhichas minor, larval rearing, thermal regime, larval survival, larval growth, specific growth rate, formulated feed, aquaculture production, temperature regulation, marine fish culture, larval feeding
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