中华鲟幼鱼到达长江口时间新记录  

New timing record of juvenile Acipenser sinensis appearing in the Yangtze Estuary

作　　者：赵峰[1] 庄平[1] 张涛[1] 徐军民 刘鉴毅[1] 章龙珍[1] 王敏 石琼 

机构地区：[1]中国水产科学研究院东海水产研究所,长江口渔业生态重点实验室,上海200090 [2]深圳华大基因研究院广东省海洋经济动物分子育种重点实验室,广东深圳518083 [3]镇江华大水生生物研究所,江苏镇江212132

出　　处：《海洋渔业》2015年第3期288-292,共5页Marine Fisheries

基　　金：公益性行业(农业)科研专项经费(201203065);香港海洋公园保育基金(FH02-1415);农业部财政专项(2130135-探捕);广东省省部产学研专项(2013B090800017)

摘　　要：2015年4月16日,在长江口水域监测到1 ind中华鲟(Acipenser sinensis)幼鱼,全长8.10 cm,体长7.00 cm,体质量2.19 g,经形态和分子鉴定,确定为野生中华鲟幼鱼,这是2014年以来在长江口水域监测到的首例野生中华鲟幼鱼。与历史资料相比,该幼鱼到达长江口时间提早约1个月,是中华鲟幼鱼到达长江口的最早新记录。该小规格幼鱼的发现和较早的在长江口水域出现,原因有几种推测:一是长江葛洲坝下产卵场仍然存在中华鲟产卵活动,但产卵时间发生了较大变化;二是在葛洲坝下中华鲟产卵场下游形成了新产卵活动场所,且距离长江口更近。A fish specimen with total length 8. 10 cm,body length 7. 00 cm and body weight 2. 19 g,which was identified as wild Chinese sturgeon（ Acipenser sinensis） by morphological and molecular methods was collected in the Yangtze Estuary on April 16 th,2015. It was the first juvenile Chinese sturgeon appearing in the Yangtze Estuary since 2014. The appearing time of the juvenile is a new record in the Yangtze Estuary,which is about 1 month earlier than the historical records. On this finding,it was deduced that：（ i） there were spawning activities for Chinese sturgeon in the spawning grounds below Gezhouba Dam,but the spawning time changed greatly;（ ii） there was a new spawning site for Chinese sturgeon,which localized in the downstream of the original spawning grounds,and was more closer to the Yangtze Estuary.

关 键 词：中华鲟 幼鱼洄游 出现时间 体长 体质量 长江口 

分 类 号：Q959.463[生物学—动物学]