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- Title
Effect of replacing fish meal with soybean meal on growth, feed utilization and nitrogen and phosphorus excretion of juvenile Pseudobagrus ussuriensis.
- Authors
Wang, Yuyu; Yu, Shiliang; Wang, Yueyang; Che, Jianfang; Zhao, Liping; Bu, Xianyong; Yang, Yuhong
- Abstract
An 8-week feeding trial was conducted to evaluate the effects of replacing fish meal with soybean meal ( SBM) on growth, feed utilization, and nitrogen (N) and phosphorus (P) excretion of juvenile Pseudobagrus ussuriensis (initial average weight 0.50 ± 0.00 g). Seven isonitrogenous and isolipidic diets were formulated to contain SBM to replace fish meal protein at 0% (S0), 10% (S10), 20% (S20), 30% (S30), 40% (S40), 50% (S50) and 60% (S60) respectively. To investigate the effects of supplementation with crystalline amino acid to balance diet S60, one diet was formulated to add 0.30% methionine ( SM60). The results showed that there was no significant difference in weight gain among fish fed S0, S10, S20, S30 and S40 diets, however, a significant reduction in this variable occurred when 50% and 60% of fish meal protein was replaced by SBM ( P < 0.05). Apparent digestibility coefficients of dry matter, crude protein and phosphorus of diets were affected by dietary SBM levels. N and P excretion indicate that fish meal replacement by SBM led to an increase in N excretion, but led to a reduction in P excretion. No differences were detected in growth, feed utilization and N and P excretion between fish feed diets S60 and SM60. The results of this study show that 40% of fish meal protein could be replaced by SBM in diets of juvenile P. ussuriensis without having a significant negative effect on growth or feed efficiency, but that higher dietary SBM levels reduce fish performance.
- Subjects
FISH feeds; FEED utilization efficiency; PHOSPHORUS in animal nutrition; NITROGEN in animal nutrition; SOYBEAN meal as feed
- Publication
Aquaculture Research, 2016, Vol 47, Issue 10, p3145
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.12765