【摘要】：利用2004~2009年長江宜昌江段三層流刺網(wǎng)的漁獲物數(shù)據(jù),分析三層流刺網(wǎng)的主要捕撈對象和個體大小,探討三層流刺網(wǎng)對長江魚類資源的影響。結(jié)果顯示,采集到5目8科40種魚類,主要捕撈對象為銅魚、圓口銅魚、瓦氏黃顙魚、長吻洜和圓筒吻泩等喜流水的種類。三層流刺網(wǎng)主要捕撈對象的體長明顯小于初次性成熟體長。本研究的分析結(jié)果說明三層流刺網(wǎng)的主要捕撈對象為喜流水、中下層魚類的幼魚,對魚類資源造成了過度捕撈。為了保護長江魚類資源,建議在長江水系開展全面禁漁。
[Abstract]:Based on the catch data of three laminar Gill nets in Yichang section of the Yangtze River from 2004 to 2009, the main fishing objects and individual sizes of the three layer Gill nets were analyzed, and the effects of the three laminar Gill nets on the fish resources of the Yangtze River were discussed. The results showed that 40 species of fishes belonging to 8 families of 5 orders were collected, and the main fishing objects were copper fish, cupreous fish, Pelteobagrus valvidraco, longicolor and Cylindrical fish. The body length of the main fishing object of the three laminar Gill net was obviously smaller than that of the primary sexual maturity. The results of this study show that the main fishing object of the three-layer Gill net is the love of flowing water, and the young fish of the middle and lower fishes cause overfishing to the fish resources. In order to protect the fish resources of the Yangtze River, it is suggested that a total fishing ban should be carried out in the Yangtze River system.
【作者單位】： 中國科學院水生生物研究所;中國科學院水生生物多樣性與保護重點實驗室;中國科學院大學;
【基金】：中國長江三峽集團科研項目(799522) 農(nóng)業(yè)部公益性行業(yè)科研專項(201203086-08) 中國長江三峽集團公司科研項目(CT-12-08-01)
【分類號】：S931

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