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引用本文:杨一帆,姜涛,高小平,轩中亚,陈修报,李乐康,刘洪波,杨健.赣江发现溯河洄游型刀鲚(Coilia nasus).湖泊科学,2021,33(5):1595-1606. DOI:10.18307/2021.0526
Yang Yifan,Jiang Tao,Gao Xiaoping,Xuan Zhongya,Chen Xiubao,Li Lekang,Liu Hongbo,Yang Jian.Discovery of anadromous Coilia nasus in the Ganjiang River, Lake Poyang Basin, China*. J. Lake Sci.2021,33(5):1595-1606. DOI:10.18307/2021.0526
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赣江发现溯河洄游型刀鲚(Coilia nasus)
杨一帆1, 姜涛2, 高小平3, 轩中亚1, 陈修报2, 李乐康3, 刘洪波2, 杨健1,2
1.南京农业大学无锡渔业学院, 无锡 214081;2.中国水产科学研究院长江中下游渔业生态环境评价与资源养护重点实验室, 中国水产科学研究院淡水渔业研究中心, 无锡 214081;3.江西省九江市水产科学研究所, 九江 332000
摘要:
基于鱼类江海洄游与否的电子探针耳石锶和钙微化学判别手段,对2020年5月采于赣江炉子窑江段的21尾刀鲚的生态表型进行了生活史重建的探索.研究发现,16尾为典型的溯河洄游型刀鲚,其占总刀鲚标本数量的比例达76%,远高于迄今鄱阳湖及其通湖水系所报道的相关比率.赣江中应该存在洄游型刀鲚的产卵场.这些首次确证了赣江中溯河洄游型刀鲚的存在,并体现出了在长江生态大保护及2019年2月1日业已开始的相关禁渔等国策下,赣江水域洄游型刀鲚资源量和栖息地有恢复向好的趋势.宜尽快开展赣江下游相关类群分布区和产卵场等及水利工程、河道挖沙等潜在威胁因素影响的全面调查,以便有效保护该水域的刀鲚资源及其关键栖息地.
关键词:  赣江  刀鲚  耳石微化学  溯河洄游  鄱阳湖  保护
DOI:10.18307/2021.0526
分类号:
基金项目:农业农村部农业财政专项项目(CJDC-2017-22)和无锡市留学人员科技活动择优重点资助项目(CZ2019231400)联合资助.
Discovery of anadromous Coilia nasus in the Ganjiang River, Lake Poyang Basin, China*
Yang Yifan1, Jiang Tao2, Gao Xiaoping3, Xuan Zhongya1, Chen Xiubao2, Li Lekang3, Liu Hongbo2, Yang Jian1,2
1.Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, P. R. China;2.Key Laboratory of Fishery Eco-environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery, Wuxi 214081, P. R. China;3.Jiujiang Fisheries Research Institute, Jiujiang 332000, P. R. China
Abstract:
A confirmatory study on the distribution of anadromous Coilia nasus was conducted using otolith strontium and calcium microchemistry, based on 21 fishes sampled at the Luziyao section of the Ganjiang River in Lake Poyang Basin on May 27th, 2020. The results indicated that 16 individuals were anadromous-long supermaxilla ecomorphotype and constituted as high as 76% of the total sampled fish. The proportion is far higher than those reported in literature till now for C. nasus around the Lake Poyang and its tributaries. The spawning site of the fish possibly exists in the Gangjiang River. The present study firstly confirmed the existence of anadromous C. nasus in the Ganjiang River and provided objective evidence on the recovery tendency of resource and habitat for this fish under the national policies of ecological protection and the corresponding ban on fishing (started on February 1st, 2019) in the Yangtze River. To rescue protection of resources and key habitats for C. nasus in the Gangjiang River, further studies are urgently needed to more accurately locate the distributing areas and spawning sites, and assess the potential impacts from human activities (e.g., hydraulic engineering, sand mining of river bed) to C. nasus.
Key words:  Ganjiang River   Coilia nasus  otolith microchemistry  anadromy  Lake Poyang  protection
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