期刊
AQUACULTURE RESEARCH
卷 50, 期 3, 页码 934-943出版社
WILEY
DOI: 10.1111/are.13968
关键词
growth performance; muscle composition analysis; principal component analysis; Procambarus clarkii; stable isotope analysis
类别
资金
- Technical Innovation Project of Science and Technology Department of Hubei Province [2016ABA123]
- Special Fund for Agro-scientific Research in the Public Interest [201203081]
- R & D Project of the Ministry of Science and Technology of China [2015BAD13B02]
- Science and Technology Service Network Initiative of Chinese Academy of Sciences [KFJ-EW-STS-062]
Overfeeding in aquaculture can lead to suboptimal growth and increased production costs. Red swamp crayfish, Procambarus clarkii, is one of the most noteworthy species cultured in China, but little information is available on the optimal feeding levels of this species, especially in ponds cultured with macrophytes. In this study, we tested the effects of five different feeding levels (20%, 40%, 60%, 80% and 100% satiation) of an artificial diet on growth performance and muscle composition of juvenile P. clarkii in 15 concrete ponds cultured with the macrophyte Hydrilla verticillata (three replicates for each treatment). The results showed that growth performance decreased only when feeding levels were below 60% satiation. Muscle composition analysis revealed that the moisture and ash contents of muscle did not vary significantly with feeding levels but that the lipid and protein contents of muscle significantly decreased when P. clarkii was fed to 40% satiation. Stable isotope analysis suggested a shift in crayfish diets to easily available H. verticillata when feeding levels decreased. With this study, we hope to encourage crayfish farmers to reduce feeding levels and increase natural food items such as macrophytes in cultured ponds to maximize crayfish yields and reduce production costs.
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