Restoration of the European sturgeon, Acipenser sturio L., 1758 in Germany: Effect of Different Feed Items on Specific Growth Rates of Large Juvenile Fish
✍ Scribed by Emanuel C. K. Hensel; Frank Kirschbaum; Patrick Williot; Manfred Wirth; Jörn Gessner
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 113 KB
- Volume
- 87
- Category
- Article
- ISSN
- 1434-2944
No coin nor oath required. For personal study only.
✦ Synopsis
23 Acipenser sturio juveniles (51 months old, median total length 80 cm, median weight 1950g) of a 1995 artificially reproduced F1 population from the Cemagref, Bordeaux were used for feeding experiments for 28 weeks. Fish were kept in two experimental tanks (5.5 m 3 ) at 20.5 °C and natural photoperiod in freshwater. During the first 16 weeks fish were fed three frozen components (3C), small marine fish (FSMF), small chironomids (FSC) and large chironomids (FLC) except for 3 two weeks periods when the 3 single components were tested: the highest median specific growth rates (MSGR) were obtained with the FLC feed (0.43% bw/d). From weeks 17 to 28 FLC feed was offered except for 2 two weeks periods: a feeding experiment was performed with FLC plus frozen pieces of smelt (MSGR -0.18% bw/d) and a starvation experiment (MSGR -0.32% bw/d). A. sturio showed a high variation in both the MSGR and the individual SGR values thus limiting the interpretation of these quantitative results.