Effect of dietary phosphorus levels on growth and body composition of crucian carp, Carassius auratus under indoor and outdoor experiments

Indoor and outdoor experiments were carried out simultaneously to evaluate the effects of dietary phosphorus levels on growth performance and body composition of crucian carp. Monocalcium was used to formulate extruded feed containing available phosphorus (AP) of 1.5 (D1), 4.7 (D2), 6.3 (D3) and 9.0...

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Bibliographic Details
Published inAquaculture nutrition Vol. 23; no. 4; pp. 702 - 709
Main Authors Chen, M.H., Sun, Y.Y., Kong, C.M., Tang, H.J., Gan, L.
Format Journal Article
LanguageEnglish
Published Oxford Hindawi Limited 01.08.2017
Subjects
Body composition
crucian carp
Diet
diet phosphorus levels
Enclosures
Experiments
Feed conversion efficiency
Feeds
Fish
Fish culture
Food conversion
Freshwater fishes
growth performance
Growth rate
indoor experiment
Juveniles
Lipids
outdoor experiments
Phosphorus
Proteins
Tanks
Vertebrae
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Summary:Indoor and outdoor experiments were carried out simultaneously to evaluate the effects of dietary phosphorus levels on growth performance and body composition of crucian carp. Monocalcium was used to formulate extruded feed containing available phosphorus (AP) of 1.5 (D1), 4.7 (D2), 6.3 (D3) and 9.0 (D4) g kg−1. Twelve 500‐L recirculating tanks were assigned to four triplicate groups with each tank stocked with 15 juveniles (39.88 ± 0.14 g) for indoor experiment. Twelve polyethylene enclosures were assigned to four groups with each one stocked with 120 juveniles (44.08 ± 1.36 g). After 8 weeks of feeding, survival ranged from 96% to 100%. Weight gain, special growth rate, protein efficiency ratio and feed conversion rate did not show significant differences among dietary treatments in both experiments. Fish cultured in the enclosures grew better, although D1 and D2 treatments did not reach significant level. Crude protein and phosphorus content of the fish were not significantly affected by dietary phosphorus level. Moisture, crude lipid, crude ash and vertebrae phosphorus were significantly affected by different phosphorus levels. Based on vertebrae phosphorus, crucian carp cultured in the tanks and in the enclosures showed phosphorus deficiency under 4.7 g kg−1 and 6.3 g kg−1 AP, respectively.
ISSN:1353-5773
1365-2095
DOI:10.1111/anu.12437