上犹江水库鲢鳙生态增殖区与禁捕区鱼类群落营养结构差异的研究

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中文摘要：为探明鲢鳙增殖对上犹江水库食物网结构的调控,2022年5月-2023年2月对上犹江水库生态增殖区(崇义段)和禁捕区(上犹段)开展渔业资源调查,依据主要消费者及饵料生物样品的碳、氮稳定同位素值(813C、δ15N),利用SIBER和MixSIAR模型分析两个区域渔获物群落营养结构差异,并初步构建食物网.结果显示:生态增殖区和禁捕区的主要渔获物δ13C值范围分别为-28.40‰～-22.13‰和-32.03‰～-17.36‰;δ15N值范围分别为7.83‰～14.68‰和6.34‰～16.41‰;营养级范围分别为1.28～4.25和1.97～3.74,其中,生态增殖区和禁捕区营养级最高的鱼类均为肉食性鱼类鳡,营养级最低的鱼类分别为细鳞斜颌鲴和黄尾鲴;与禁捕区相比,生态增殖区鱼类摄食的食物资源更丰富、所占的生态位更宽,但群落营养结构各项指标,包括NR、CR、TA、CD、NND和SDNND均低于禁捕区.湿地植物为生态增殖区的主要碳源,而浮游植物为禁捕区的主要碳源.本研究揭示了禁捕区和生态增殖区鱼类群落营养结构的差异,为后续湖泊水库等大水面生态放养与生态修复提供理论依据.

外文标题：Difference in the trophic structure of fish communities in the ecological-stocking area of Hypophthalwvichthys molitrix and H.nobilis and the closed-fishing area in Shangyoujiang Reservoir

外文摘要：Shangyoujiang Reservoir is located between Chongyi County and Shangyou County in Jiangxi Prov-ince of China.It is one of several large reservoirs in Jiangxi Province.The Shangyou Section of Shangyoujiang Reservoir is a national aquatic germplasm conservation zone,and the Chongyi section is an essential large sur-face fishing base for breeding,stocking and adult fish reproduction of silver carp and bighead carp.Comparing the differences in aquatic food networks in the two regions is significant for their subsequent ecological stocking and the management of no-take lakes and reservoirs.The fishery resources in the ecological-stocking area(Chongyi section)and closed-fishing area(Shangyou section)of Shangyoujiang Reservoir were investigated from May 2022 to February 2023 to investigate the regulation of the growth of Hypophthalwvichthys molitrix and H.nobilis on the food web structure of Shangyoujiang Reservoir.SIBER and SIAR models were used to analyze the trophic structure differences of the two fish communities and initially construct the aquatic food web.The re-sults showed that the δ13C values of fish in the ecological-stocking area and the closed-fishing area ranged from-28.40‰ to 22.13‰ and-32.03‰ to-17.36‰,respectively.The δ15N values ranged from 7.83‰ to 14.68‰ and 6.34‰ to 16.41‰,respectively.The trophic levels ranged from 1.28～4.25 and 1.97～3.74,respectively.In both water areas,the trophic level of carnivorous Elopichthys bambusa was highest.Plagiognathops microlepis and Xenocypris davidi trophic levels were the lowest in the ecological-stocking and closed-fishing areas,respectively.Compared with the closed-fishing area,the fish in the ecological-stocking area had more abun-dant food resources and occupied a broader ecological niche.However,the indices of community nutrition structure,including NR,CR,TA,CD,NND,and SDNND,were lower than those in the closed-fishing area.Wetland plants are the main carbon sources in the ecological stocking area,and phytoplankton are the main carbon sources in the closed-fishing area.This study revealed the difference of the trophic structure of fish communities between the closed-fishing areas and the ecological-stocking area,which provide a theoretical ba-sis for ecological-stocking and ecological restoration in large water surfaces such as lakes and reservoirs.

外文关键词：

Hypophthalwvichthys molitrix and H.nobilistrophic structureenhancementfishing banShangyou-jiang Reservoirstable isotope technology

作者：

巫曦雅、龚海波、易霈霈、傅雪军、余进祥、余智杰、孟子豪、黄滨、王淑兵

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作者单位：

江西省水生生物保护救助中心,南昌 330029

中国水产科学研究院长江水产研究所农业农村部淡水生物多样性保护重点实验室,武汉 430223

南昌市新建区动物疫控中心,南昌 330100

关键词：

鲢鳙营养结构增殖放流禁捕上犹江水库稳定同位素技术

基金：

国家大宗淡水鱼产业技术体系江西省重点研发计划"揭榜挂帅"项目江西省农牧渔业科研指导性课题

项目编号：

CARS-45-4120223BBF61010JXNMY202245

出版年：

2024

淡水渔业

中国水产学会中国水产科学研究院长江水产研究所中国水产科学研究院淡水渔业研究中心

淡水渔业

CSTPCD北大核心

影响因子：0.776

ISSN：1000-6907

年,卷(期)：2024.54(5)