摘要
为研究藕虾共作模式和精养模式中克氏原螯虾(Procambarus clarkii)食物组成和食性差异,在养殖期间通过测定克氏原螯虾、饲料和池塘常见天然饵料的碳、氮稳定同位素值,并利用SIAR混合模型计算了不同饵料对克氏原螯虾食物的贡献率。结果表明:藕虾共作模式中饲料和天然饵料的δ^(13)C值和δ^(15)N值范围分别为-30.81‰~-20.54‰,0.46‰~4.04‰,精养模式饲料和天然饵料的δ^(13)C值和δ^(15)N值范围分别为-31.91‰~-20.73‰,2.33‰~8.05‰;藕虾共作模式克氏原螯虾食物来源主要为水花生(34.31%)和莲(20.32%),精养模式食物来源主要为饲料(30.08%)和伊乐藻(18.69%)。研究表明,克氏原螯虾在藕虾共作模式中偏向于摄食水生植物,在精养模式中主要摄食饲料,藕虾共作模式的食物来源分布较精养模式更均匀,且植物性饵料贡献率较精养模式高。
In order to study the difference in food composition and feeding habits of red swamp crayfish(Procambarus clarkii)in co-culture mode of lotus root and crayfish and in intensive culture mode in Jiangsu Province,the carbon and nitrogen stable isotope values of red swamp crayfish,feed and common natural food were measured in the ponds of co-culture mode stocking with red swamp crayfish with body weight of 10.0 g at stocking density of 37.5 g/m^(2)and lotus root at planting density of 600 g/m^(2)and intensive culture mode stocking with red swamp crayfish at stocking density of 60g/m^(2)during the breeding period,and the SIAR mixture model was used to calculate the contribution rate of different foods to the food of red swamp crayfish.The results showed that the isotope values were ranged from-30.81‰to-20.54‰forδ^(13)C and 0.46‰to 4.04‰forδ^(15)N in feed and natural food in the co--culture mode of lotus root and crayfish,and that-31.91‰to-20.73‰forδ^(13)C and 2.33‰to 8.05‰forδ^(15)N in feed and natural food in the intensive culture mode.The food sources were mainly Alternanthera philoxeroides(34.31%)and Nelumbo nucifera(20.32%)in the co-culture mode of lotus root and crayfish,while the food sources were primarily formulated feed(30.08%)and Elodea nuttallii(18.69%)in the intensive culture mode.Red swamp crayfish prefers to feed aquatic plants in the co-culture mode of lotus root and crayfish,but mainly feeds feed in the intensive culture mode.The food source distribution of the co-culture mode of lotus root and crayfish was shown to be more even than that in the intensive culture mode,with higher contribution rate of plant food than that in the intensive culture mode.
作者
廖河庭
郑尧
刘祝萍
陈家长
LIAO Heting;ZHENG Yao;LIU Zhuping;CHEN Jiazhang(Wuxi Fisheries College,Nanjing Agricultural University,Wuxi 214128,China;Key Laboratory of Integrated Rice-Fish Farming Ecology,Ministry of Agriculture and Rural Affairs,Freshwater Fisheries Research Center(FFRC),Chinese Academy of Fishery Sciences(CAFS),Wuxi 214081,China)
出处
《大连海洋大学学报》
CAS
CSCD
北大核心
2024年第5期804-810,共7页
Journal of Dalian Ocean University
基金
国家重点研发计划项目(2020YFD0900305)。
关键词
克氏原螯虾
食性
稳定同位素
藕虾共作
精养模式
Procambarus clarkii
food composition
stable isotope
lotus root and crayfish co-culture
intensive culture mode
