Abstract
Rearing experiments on the halibut Hippoglossus hippoglossus (L.) were carried out using gametes from parents caught at a depth of 600 to 700 m off the Norwegian coast in February 1980. After fertilization, the average egg diameter was 3.08 mm, average dry weight 1 038 μg and neutral buoyancy was at 36.5‰ S. The eggs hatched after 20 d at 4.7°C, 18 d at 5°C and 13 d at 7°C. Survival to hatching was better when antibiotics were used. At hatching the larvae were 6.4 mm long, there were no functional eyes or mouth, but prominent neuromast organs were present. Resorption of yolk lasted 50 d at 5.3°C; the eyes and mouth were then functioning and the larva was about 11.5 mm long. The larvae were offered zooplankton as food, but with little success in initial feeding. A few larvae fed and grew in 2 500-litre plastic bags, one reaching a length of 24 mm after 90 d.
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Communicated by J. Mauchline, Oban
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Blaxter, J.H.S., Danielssen, D., Moksness, E. et al. Description of the early development of the halibut Hippoglossus hippoglossus and attempts to rear the larvae past first feeding. Mar. Biol. 73, 99–107 (1983). https://doi.org/10.1007/BF00396290
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DOI: https://doi.org/10.1007/BF00396290