Time of first feeding of Atlantic halibut, Hippoglossus hippoglossus L., larvae |
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| Authors: | T Harboe A Mangor-Jensen |
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| Institution: | Institute of Marine Research, Austevoll Aquaculture Research Station, N-5392 Storebø, Norway |
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| Abstract: | Atlantic halibut, Hippoglossus hippoglossus (L.), eggs originating from one female were evenly distributed between four silos (4.8 m3) shortly prior to hatching. At days 30, 35, 40 and 44 after hatching i.e. 200, 230, 260 and 290 day-degrees (dayso)], the larvae were successively collected and transferred to indoor start feeding tanks, and larvae were offered a diet of instar II Artemia nauplii which had been enriched short time (24 h). A significant correlation was found between the age of the larvae and onset of first feeding. The larvae transferred to start-feeding incubators at 290 dayso were able to capture Artemia only a few hours after transfer, whereas it took 6 days for the larvae transferred at 200 dayso to reach a corresponding ingestion level. Larval growth was also positively correlated to both larval age and prey consumption. However, there were no differences in survival between the larval groups. |
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