Growth parameters in European sea bass (Dicentrarchus labraxL.): effects of live weight and water temperature
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">The voluntary feed intake (VFI) and growth rate of sea bass were studied for 147 days, based on different starting live<span style="font: 12.0px Helvetica;"> </span></p> <p style=...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2010-01-01
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| Series: | Italian Journal of Animal Science |
| Subjects: | |
| Online Access: | http://www.aspajournal.it/index.php/ijas/article/view/274 |
| Summary: | <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">The voluntary feed intake (VFI) and growth rate of sea bass were studied for 147 days, based on different starting live<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">weights, under natural photoperiods and varied water temperatures. Sea bass (n = 720) were divided into five weight<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">classes (60-70, 90-110, 130-150, 160-180 and 230-250 g) and distributed among 20 tanks. Seven different water tem-<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">peratures were compared: 13, 16, 19, 22, 25, 28 and 31 °C. A commercial extruded diet (N x 6.25, 43.7% DM; crude<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">fat, 25.7% DM) was used. The trial was performed in a closed-circuit plant, with a daily water turnover rate of 10%. Each<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">tank was fitted with an apparatus for collecting the uneaten food. Automatic feeders distributed equal amounts of food<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">for ten meals per day. The daily food allowance was adjusted, based on fish biomass, to permit ad libitum feeding and<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">to leave approximately 20% uneaten. Fish were exposed to natural photoperiod (March-July). Non-linear regression<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">equations were used to calculate the best-fitting curves for the data.<span style="font: 12.0px Helvetica;"> </span></p><div><span style="font-family: Helvetica, Arial, Helvetica, sans-serif; font-size: small;"><span style="font-size: 12px;"><br /></span></span></div> |
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| ISSN: | 1594-4077 1828-051X |