Growth, under laboratory conditions, of turbot,Scophthalmus maximus, from the Ría de Vigo (north-west Spain)
✍ Scribed by J. Iglesias; M. Olmedo; J. J. Otero; J. B. Peleterio; M. R. Solórzano
- Publisher
- Springer-Verlag
- Year
- 1987
- Tongue
- English
- Weight
- 578 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0025-3162
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✦ Synopsis
In August 1983, 305 wild O-group turbot (Scophthalmus maximus L.) were captured at selected beaches of the Ria de Vigo, north-west Spain, for use in fattening trials. The fish were maintained in a flow-through system (0,015 m 3 kg -I h -1) at ambient seawater temperatures (13 ~ to 18 ~ and salinities (32 to 35%0) for a period of 17 too, and were fed a moist paste prepared in the laboratory. They were divided into two groups, the larger group having a mean individual weight at the start of experiments of 9.7 g, the smaller group having a mean individual weight of 5.7 g. Over the 17 mo period, the two groups grew to final mean wet weights of 1 905 and 1 123 g, respectively.
Monthly food conversion indices, on a wet weight basis, varied between 2.1 and 5.9%. Survival during the 17 mo period varied between 90.0 and 93.1%. In a second experiment from November 1983 to February 1985, we tested the relationship between monthly growth rate and stocking density for two different groups of fish at 4 to 25 kg m -3 and at 6 to 75 kg m -3. Growth was essentially the same for both groups.