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Effects of photoperiod, stocking density and diet on growth in young spotted wolffish (Anarhichas minor Olafsen)
Jonassen, T.M. (2002). Effects of photoperiod, stocking density and diet on growth in young spotted wolffish (Anarhichas minor Olafsen). Aquacult. Int. 10(5): 411-420. https://dx.doi.org/10.1023/A:1023374921581
In: Aquaculture International. Springer: London. ISSN 0967-6120; e-ISSN 1573-143X, more
Peer reviewed article  

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Keywords
    Diets
    Photoperiods
    Population functions > Growth
    Stocking density
    Anarhichas minor Olafsen, 1772 [WoRMS]
    Norway [Marine Regions]
    Marine/Coastal

Author  Top 
  • Jonassen, T.M.

Abstract
    Full scale experiments in tanks were conducted to elucidate the effect of photoperiod regime, dietary fat level and stocking density on growth in spotted wolffish. The study showed that continuous light (LD24:0) did not give a higher final mean weight or faster overall growth rate in spotted wolffish compared to constant 8 h light and 16 h darkness (LD8:16). However, there were indications that the fish needed time to adapt to a new photoperiod regime. The feeding experiment indicated a negative relation between dietary fat level and growth, where fish given 15% fat in the diet had a 13% higher final mean weight compared to fish on a diet with 20% fat. However, no conclusions could be made. The final mean weight was 10% higher at 25 kg/m2 compared to 40 kg/m2, indicating a negative impact of high stocking density on spotted wolffish.

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