中国水产科学2025，Vol.32Issue(9)：1300-1311,12.DOI:10.12264/JFSC2025-0074
稻虾共作模式下系统营养结构及克氏原螯虾食源分析
Trophic structure of rice-crayfish co-culture system and food source of Procambarus clarkii
摘要
Abstract
The trophic structure and food sources of Procambarus clarkii(red swamp crayfish)during distinct aquaculture stages(juvenile and adult)were examined within the rice-crayfish co-culture system in Qianjiang City,Hubei Province.Stable isotope analysis was employed to quantify the carbon and nitrogen isotope ratios(δ13C,δ15N)was conducted on basic food sources and consumer within the rice-crayfish co-culture system.Trophic structure and dietary contributions were assessed using Bayesian standard ellipse models(SIBER)and mixing models(SIAR).The results indicated that δ13C values of the basic food sources ranged from-30.77‰(Alternanthera philoxeroides)to-24.19‰(feed)in juvenile,and from-30.74‰(Oryza sativa)to-24.19‰(feed)in adult.Corresponding δ15N values ranged from-3.51‰(particulate organic matter,POM)to 3.01‰(Alternanthera philoxeroides)in juvenile,and the δ15N values ranged from-3.74‰(POM)to 2.27‰(Alternanthera philoxeroides)in adult.The range of δ13C values was similar between the juvenile stage(6.58)and the adult stage(6.55).However,the range of δ15N values was greater in the juvenile stage(6.52)than in the adult stage(6.01).Significant differences in δ13C values were observed between the two stages(P<0.05),while δ15N values did not differ significantly.The food chain length was shorter in the juvenile stage(2.35)than in the adult stage(4.10),indicating lower energy transfer loss from basic food sources to P.clarkii.The average trophic level of P.clarkii was lower in the juvenile stage(2.35)than in the adult stage(3.11).SIBER analysis revealed that the adult stage of the rice-crayfish co-culture system exhibited a broader range of basic food sources(CR),a longer food chain(NR),higher trophic structure diversity(TA and CD),and lower community redundancy(MNND and SDNND).However,the results showed lower ecological space utilization(TA,SEA,SEAc)for P.clarkii compared with the juvenile stage.SIAR source tracing indicated that during the juvenile stage,zoobenthos(mainly Limnodrilus and Chironomidae)contributed the most to the diet of P.clarkii(77.7%),followed by feed(9.2%),Elodea nuttallii(5.4%),zooplankton(3.5%),Alternanthera philoxeroides(3.1%),with the lowest contribution from particulate organic matter(POM)(1.1%).In the adult stage,feed contributed the most to the diet of P.clarkii(85.1%),followed by Alternanthera philoxeroides(3.0%),Elodea nuttallii(2.9%),zoobenthos(2.6%),zooplankton(2.3%),Oryza sativa(2.2%),with the lowest contribution from POM(1.9%).This study indicates that P.clarkii has a higher utilization rate of natural food sources(e.g.,zoobenthos)during the juvenile stage.Therefore,the findings suggest that juvenile P.clarkii relies more heavily on zoobenthos.It is therefore recommended to moderately reduce artificial feed inputs,thereby enabling juveniles to fully utilize zoobenthos such as Limnodrilus and Chironomidae within the rice-crayfish co-culture system.关键词
克氏原螯虾/稻虾共作/营养结构/稳定同位素/食物贡献Key words
Procambarus clarkii/rice-crayfish co-culture/trophic structure/stable isotope/food contribution分类
农业科技引用本文复制引用
CHEN Xiaolong,LI Wen,XIONG Fei,YU Jixin,ZHAI Dongdong,CHEN Yuanyuan,LIU Hongyan..稻虾共作模式下系统营养结构及克氏原螯虾食源分析[J].中国水产科学,2025,32(9):1300-1311,12.基金项目
国家自然科学基金项目(32102820) （32102820）
江汉大学一流学科建设重大专项(2023XKZ025) （2023XKZ025）
湖北省高等学校优秀中青年科技创新团队计划项目(T2020034). （T2020034）
