Effekte einer L-Carnitin-Supplementation zur Diät auf Wachstum, Überlebensrate und Körperzusammensetzung juveniler Black Tiger Shrimps, Penaeus monodon (Fabricius 1798)

Publikations-Art

Diplomarbeit

Autoren

Schmekel, K.

Erscheinungsjahr

1995

Herausgeber

Becker, K.

Schlagworte

aquaculture, carnitine

The effects of L-carnitine supplementation to the diet on growth, survival, and body composition of juvenile tiger shrimps (Penaeus monodon FABRICIUS) were investigated. Shrimps of 2.1 - 15.7 g were reared in fibre glass tanks provided with flow-through seawater at 26 - 31 °C with a salinity of 30 - 36 g/l for 8 weeks. A series of diets was formulated including amounts of carnitine between 39 and 2360 ppm with control groups using formulations by ALMA (Germany) and SEAFDEC/AQD (Philippines). Feeding began with starter formulations containing 48.1% (SD 0.28) crude protein for the first 4 weeks followed by grower feeds containing 44.7% (SD 0.67) crude protein for the next 4 weeks (values on dry matter basis). At the end of the experiment, growth, survival, and body composition were determined. Best survival rate was found at 800 and more than 2000 ppm L-carnitine level in the feed. The best relative growth was observed in the feeding group with 1200 ppm L-carnitine content in the feed. Differences between feeding groups were significant at p < 0.05 only between ALMA and SEAFDEC formulations. For body composition (percentages reported on a fresh matter basis), no significant differences were found in N-free extracts, crude fat and gross energy contents at p < 0.05 for initial and all feeding groups, using one-way ANOVA with Duncan's multiple range test. Statistically significant differences at this level were found only between SEAFDEC feed supplemented with 400 mg and the re-pelletized ALMA feed with 600 mg L-carnitine per kg feed for crude protein, ash and water contents. However, there were no significant differences in any body composition component or in gross energy content in relation to L-carnitine level in the feeds. The water content of the ALMA feeding groups tended to be smaller and the crude fat content higher comp... [text cut due to i3v limitations] Thesis at the Humboldt University, Berlin.