Dietary calcium requirements of bighead carp (Aristichthys nobilis)

Author:

Cao Manxia1,Gao Pan2,Wang Fuchen3,Huang Feng1ORCID,Wang Yuanyuan1,Hu Xianqin1,Wang Wenbiao1

Affiliation:

1. Key Laboratory for Animal Nutrition and Feed Science of Hubei province, Wuhan Polytechnic University, Wuhan 430023, China

2. COFCO Feed (Jingzhou) Co., Ltd., Gongan, Jingzhou 434300, China

3. Tongwei Co., Ltd., Healthy Aquaculture Key Laboratory of Sichuan Province, No. 588 Tianfu Road, Gaoxin District, Chengdu 610093, China

Abstract

To investigate dietary calcium requirement of bighead carp (Aristichthys nobilis), six purified diets were formulated to contain different concentrations of calcium (0.09% (control), 0.43%, 0.76%, 1.12%, 1.44%, and 1.79% of dry diets). Each diet was hand-fed to triplicate 30 fish with an average initial body weight (3.31 ± 0.09 g) for 60 days. The results showed that weight gain (WG) and specific growth rate (SGR) significantly increased when dietary calcium level was from 0.09% to 0.76% (P < 0.05). The phosphorus and calcium contents of whole fish body were highest in the 0.76% and 1.12% group, respectively (P < 0.05). The serum phosphorus content in the 1.79% group was significantly lower than those in other groups (P < 0.05). As dietary calcium content was from 0.09% to 0.76%, the activities of lipase and proteinase in the intestine had a significant increase (P < 0.05), while the glutamic oxaloacetic transaminase (GOT) and glutamic pyruvic transaminase (GPT) activities were significantly decreased (P < 0.05). Based on quadratic curve model analysis with WG and WGR as the appraising criteria, the appropriate dietary requirement of calcium for the bighead carp larvae (3.31 ± 0.09 g) was 1.01% - 1.02%.

Publisher

AquacultureHub

Subject

Agronomy and Crop Science,Aquatic Science

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