Abstract
To assess the effect of dietary composition on growth performance and body composition of pike perch (Sander lucioperca), fingerlings with an initial body weight of 1.36 g (just trained to accept formulated feed) were fed three experimental diets in triplicate for 90 days. Two feeding groups were fed with formulated diets (CD, CD+7) containing varying levels of crude lipid (CL) of 14.65% and 21.94% dry matter (d.m.) with crude protein (CP) levels of 59.73% and 56.56%, and one feeding group was fed a natural diet (chironomids, CP = 65.93% d.m.; CL = 7.20% d.m.). Furthermore, pike perch of the same age caught in different natural habitats were analysed to determine their naturally fluctuations in body composition. Specific growth rate (SGR; CD = 3.36, CD+7 = 3.47) and feed conversion ratio (FCR; CD = 1.02, CD+7 = 0.93) of fish fed formulated diets did not differ significantly with rising dietary lipid content, due to high variability within the individuals of each feeding groups. In contrast, pike perch fed with chironomids showed a significantly lower SGR of 2.49 and higher FCR of 2.37 (on a dry matter basis). Body composition of pike perch fed formulated diets was affected by dietary composition and showed increased lipid contents [CD=6.25% original matter (o.m.), CD+7 = 9.00% o.m.] with rising dietary lipid levels. Pike perch of CD and CD+7 feeding groups showed significant increased hepatosomatic indices (HSIs) of 1.99 and 2.05 in contrast to fish fed chironomids with HSI of 1.11. Fish caught in the different natural habitats were characterised by low body lipid and dry matter contents of 0.64–1.88% o.m. and 21.08–23.75% o.m. Higher lipid incorporation of fish fed with formulated diets accompanied with poor benefit on growth performance at higher dietary lipid content indicated that pike perch ability to utilise lipids is low when dietary crude protein content is higher than 56.56%.
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Abbreviations
- CD:
-
Commercial diet
- cf :
-
Condition factor
- CL:
-
Crude lipid
- CP:
-
Crude protein
- d.m.:
-
Dry matter
- FCR:
-
Feed conversion ratio
- HSI:
-
Hepatosomatic index
- Lf :
-
Final body length
- o.m.:
-
Original matter
- PER:
-
Protein efficiency ratio
- P/E:
-
Protein/energy ratio
- SGR:
-
Specific growth rate
- SR:
-
Survival rate
- T:
-
Duration of the experiment
- Wi :
-
Initial body weight
- Wf :
-
Final body weight
- WG:
-
Weight gain
- Wl :
-
Liver weight
- Wprotf :
-
Weight of dietary crude protein supply
- WTFS :
-
Weight of total feed supplied
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Schulz, C., Günther, S., Wirth, M. et al. Growth performance and body composition of pike perch (Sander lucioperca) fed varying formulated and natural diets. Aquacult Int 14, 577–586 (2006). https://doi.org/10.1007/s10499-006-9056-z
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DOI: https://doi.org/10.1007/s10499-006-9056-z