The effects of dietary crude protein on growth of the Eurasian perch Perca fluviatilis

Fiogbé, Emile Didier; Kestemont, Patrick; Mélard, Charles; Micha, J. C.

doi:10.1016/s0044-8486(96)01293-8

Cited by 38 publications

(35 citation statements)

References 19 publications

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“…Nevertheless, the P/E ratio of formulated diets of 26.53 CP/MJ GE and 23.54 CP/MJ GE are in the range of the P/E ratio (25.92 g CP/MJ GE) recommended as the most efficient diet in the experiments of Nyina-Wamwiza et al (2005). Lower optimum dietary P/E ratios reported for other percids (Eurasian perch 18.4-22.0 g CP/MJ GE, Fiogbé et al 1996;Mathis et al 2003; yellow perch 20-22 g CP/MJ ME, Ramseyer and Garling 1998) indicate that pike perch could have the ability for increased dietary protein utilisation. In comparison with reports for other percids, feed conversion obtained in the presented study was excellent.…”

Section: Growth Performancementioning

confidence: 83%

“…Studies carried out on juvenile Eurasian perch (2.9 g initial body weight) or yellow perch (51 g initial body weight) indicate that low dietary fat (10%) and high protein content (>40%) seem to be beneficial for growth performance of percids (Fiogbé et al 1996;Brown et al 1996;Kestemont et al 2001;Xu and Kestemont 2002). Furthermore, increasing lipid tissue incorporation and peritoneal deposition observed in percids indicate low utilisation of dietary lipid supply.…”

Section: Introductionmentioning

confidence: 99%

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Growth performance and body composition of pike perch (Sander lucioperca) fed varying formulated and natural diets

et al. 2006

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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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Section: Growth Performancementioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Growth performance and body composition of pike perch (Sander lucioperca) fed varying formulated and natural diets

et al. 2006

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“…3). The relationship between SGR and food protein content indicated that the optimum crude protein content was consistent throughout the 3-20 g weight range, averaging 4243% (Fiogbé et al 1996;Fig.4).…”

Section: Effect Offood Ration Protein Level and Feeding Frequencymentioning

confidence: 90%

Intensive culture of juvenile and adult Eurasian perch (P. fluviatilis): effect of major biotic and abiotic factors on growth

1996

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SummaryRecent developments in Eurasian perch (Percafluuiatilis) larval rearing and weaning techniques allow large-scale intensive rearing tests, both with juveniles and adults. This review presents the results of experiments conducted in a commercial scale production environment (0.5-1.6m3 flow-through tanks) and focuses on the most relevant factors influencing growth and production in intensive rearing systems. Combined effects of food ration and temperature showed that the maximum growth rates (0.06-1.80 g fish-t day-l for 1-300 g fish) were observed at 23"C. The thermal range for intensive rearing of perch extends at least down to ll'C (growth rate equivalent to 29oÂ of that observed at 23"C). The maximum daily food ration (94.5% lipid;5744o/o crude protein) at23"C resulted in feed conversion rates from 1.1 to 2.0 in fish ranging from I to 1509 and was modelled as follows (R' :0.89): R-u* (7o duy-') : 7.60 w (weight, g)'". Juvenile (1-l5g) perch reared at 10000 fish m-3 showed a growth rate of 0.2 g fish I day ', thus 670Â higher than at 400 fish m-3. In the most intensive rearing trials (I24kgm 3), the maximum production rate observed was 2.6 kg -' day '.Growth heterogeneity constitutes a major constraint in perch culture. Size grading experiments resulted in the emergence of fast-growing fish in each sorted group. In addition, the sorting process caused the productivity to be slightly lower (5-6%) than in non-sorted populations of the same origin and body weight. Mass mortality may take place at any stage of perch rearing within the 1-200 g body weight range. In general, an overall 500% survival rate was recorded after 14 months. Parasites, bacteria and fungi were the most frequently encountered causes of mortality. The occurrence and impact of diseases were largely reduced in recirculating systems where the survival rate is 70o/o higher than the values observed in flow-through rearing systems. In intensive rearing systems at 23"C and at maximum stocking biomass of 50 kg --', 44-day-old weaned perch juveniles (ranging from 0.5 to 1g initial body weight) reached an average body weight of 130-150 g after 1 year of rearing. Still, this marketable size was reached about 3 months earlier by fast growing individuals within the population.The intensive culture of perch at a constant23"C water temperature allowed much higher growth rates than usually observed in conventional, extensive systems under natural thermal regimes. Constant temperatures also inhibited the sexual maturation in females. Further improvements in growth and productivity in intensive perch rearing will closely rely on techniques such as the selection of fast-growing strains, monosex female or sterile triploïd fish production.

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“…After that, 240 fish were divided randomly into eight 120-L rectangular tanks (30 fish per tank) to provide duplicates of the four dietary treatments. The diets were formulated to meet the protein and lipid requirements of Eurasian perch (36)(37)(38) and contained 45% protein and 16% lipid (a cod liver oil diet served as the control treatment) with all ingredients identical except for the different lipid sources (Table 1). Fish were subjected to a natural photoperiod, and the water temperature during the experimental period was kept constant at 23°C.…”

Section: Methodsmentioning

confidence: 99%

Lipid metabolism and FA composition in tissues of Eurasian perch Perca fluviatilis as influenced by dietary fats

Xueliang

Kestemont

2002

Lipids

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Eurasian perch, Perca fluviatilis, were fed a semipurified fat-free diet for 4 wk, followed by a 16% feeding supplementation of either olive oil (OO), safflower oil (SO), linseed oil (LO), or cod liver oil (CLO) as the only lipid source in each diet for 10 wk. Significant reductions in total lipid of tissues were observed (31.4% in viscera, 66.7% in muscle, and 74.1% in liver) after feeding the fat-free diet. The SO-, LO-, and CLO-fed fish significantly increased lipid deposition in liver and viscera compared to fish fed the OO diet; however, muscle lipid levels were not significantly affected. Large amounts of dietary 18:1 n-9 were incorporated directly into tissue lipids when fish were fed the OO diet. The LO diet significantly elevated 18:4n-3, 20:5n-3, 22:5n-3, and 22:6n-3 in the liver compared to fish fed OO or SO diets, and the n-3/n-6 ratio was 16 times that of the SO group, with significantly high desaturation and elongation products of 18:3n-3. These results suggest that delta6 and delta5 desaturases are highly active in Eurasian perch, and that the enzymes at this dietary n-3/n-6 ratio favor 18:3n-3 over 18:2n-6 as substrate. The SO diet significantly increased 18:3n-6, 20:3n-6, and 22:5n-6 in the liver and significantly decreased EPA and DHA. This indicates that desaturation enzymes were not specifically favoring n-3 over n-6 acids in perch lipid metabolism, and that these elongation and desaturation enzymes were influenced by n-3 and n-6 FA content in the diet. The present study indicates that high tissue content of DHA in the muscle of Eurasian perch was attributable to the greater ability for n-3 acid bioconversion.

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The effects of dietary crude protein on growth of the Eurasian perch Perca fluviatilis

Cited by 38 publications

References 19 publications

Growth performance and body composition of pike perch (Sander lucioperca) fed varying formulated and natural diets

Growth performance and body composition of pike perch (Sander lucioperca) fed varying formulated and natural diets

Intensive culture of juvenile and adult Eurasian perch (P. fluviatilis): effect of major biotic and abiotic factors on growth

Lipid metabolism and FA composition in tissues of Eurasian perch Perca fluviatilis as influenced by dietary fats

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