期刊
AMBIO
卷 45, 期 3, 页码 361-373出版社
SPRINGER
DOI: 10.1007/s13280-015-0722-0
关键词
Chinese mitten crab; Eriocheir sinensis; Farming practice; Feed type; Macrophyte; Yield; Hongze lake
资金
- National Science and Technology Supporting Program of China [2012BAD25B08]
- State Key Laboratory of Freshwater Ecology and Biotechnology [2014FBZ04]
- Chinese Academy of Sciences (CAS)
- CAS
Results of a survey of 156 Chinese mitten crab (Eriocheir sinensis) grow-out farms around Hongze Lake (118.48-118.72A degrees E; 33.36-33.38A degrees N) are reported. Area farmed has remained relatively unchanged but production (59 932 t in 2012) increased steadily over the last 7 years, indicative of the viability and sustainability of the farming system that has gradually replaced intensive Chinese major carp polyculture around Hongze Lake. Results showed that production range was 135-2400 kg ha(-1) cycle(-1) (mean 1144 +/- A 34). Crab yields correlated linearly to stocking density and conformed to a normal distribution curve, with 66.7 % of farms yielding 900 kg ha(-1) cycle(-1) or more. Yield was negatively correlated to pond size and capture size (p < 0.01), and farms with macrophyte coverage rate lower than 30 % of water surface were significantly (p < 0.05) lower than those exceeding 30 %.
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