Growth parameters in European sea bass (Dicentrarchus labraxL.): effects of live weight and water temperature
| Autor: | Edo D’Agaro, D. Lanari, Rodolfo Ballestrazzi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
biology
040301 veterinary sciences 0402 animal and dairy science Live weight Voluntary feed intake Growth rate Body weight Temperature Sea bass 04 agricultural and veterinary sciences biology.organism_classification Body weight 040201 dairy & animal science 0403 veterinary science Fishery Animal science Water temperature Fish Animal Science and Zoology Dicentrarchus Growth rate lcsh:Animal culture Sea bass lcsh:SF1-1100 |
| Zdroj: | Italian Journal of Animal Science, Vol 1, Iss 3, Pp 181-185 (2010) |
| ISSN: | 1594-4077 |
| Popis: | The voluntary feed intake (VFI) and growth rate of sea bass were studied for 147 days, based on different starting live weights, under natural photoperiods and varied water temperatures. Sea bass (n = 720) were divided into five weight classes (60-70, 90-110, 130-150, 160-180 and 230-250 g) and distributed among 20 tanks. Seven different water tem- peratures were compared: 13, 16, 19, 22, 25, 28 and 31 °C. A commercial extruded diet (N x 6.25, 43.7% DM; crude fat, 25.7% DM) was used. The trial was performed in a closed-circuit plant, with a daily water turnover rate of 10%. Each tank was fitted with an apparatus for collecting the uneaten food. Automatic feeders distributed equal amounts of food for ten meals per day. The daily food allowance was adjusted, based on fish biomass, to permit ad libitum feeding and to leave approximately 20% uneaten. Fish were exposed to natural photoperiod (March-July). Non-linear regression equations were used to calculate the best-fitting curves for the data. |
| Databáze: | OpenAIRE |
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