本文關(guān)鍵詞：長江上游宜賓江段漁業(yè)資源現(xiàn)狀研究　出處：《西南大學學報(自然科學版)》2015年11期 　論文類型：期刊論文

  更多相關(guān)文章： 漁業(yè) 漁獲物 相對重要性指數(shù) 特有魚類 長江上游

【摘要】：為了解長江上游宜賓江段魚類群落結(jié)構(gòu)和漁業(yè)捕撈現(xiàn)狀及變化趨勢,為物種和資源保護提供依據(jù),該文對宜賓江段的流刺網(wǎng)和小鉤等主要作業(yè)漁具的漁獲物進行了調(diào)查,對漁獲物種類組成、捕撈規(guī)格和單位捕撈努力量漁獲量等進行了統(tǒng)計分析.結(jié)果表明:在宜賓江段共采集到魚類49種,隸屬于3目10科29屬,以鯉形目和鲇形目魚類為主.圓口銅魚、瓦氏黃顙魚、異鰾鰍泙、宜昌鰍泙和蛇泩為該江段的優(yōu)勢種.采集到長江上游特有魚類11種,占魚類總種數(shù)的22.4%,其中一半以上的特有魚類為偶見種.宜賓江段漁業(yè)捕撈規(guī)格普遍偏小,大部分捕撈個體體質(zhì)量在100g以下,體長在150mm以下.該江段流刺網(wǎng)和小鉤的單位捕撈努力量漁獲量僅為每船1~2kg/d.宜賓江段漁業(yè)資源已嚴重衰退,許多特有魚類變?yōu)榕家姺N,漁業(yè)捕撈漁獲量偏低,捕撈規(guī)格偏小,建議采取休魚等措施,促進物種和資源的保護.
[Abstract]:In order to understand the structure of fish community and the current situation and trend of fishery fishing in Yibin section of the upper reaches of the Yangtze River, it provides the basis for species and resource protection. In this paper, the catch of main fishing gear such as drift-gill net and small hook in Yibin River was investigated, and the species composition of catch was analyzed. The results showed that 49 species of fish were collected in Yibin River, belonging to 3 orders, 10 families and 29 genera. The dominant species were Cyprinidae and catfish. The dominant species were copper fish, Pelteobagrus vacobagrus varicobagrus varicobagrus varicobagneo, Loach seat and serpentine. 11 species of fish endemic to the upper reaches of the Yangtze River were collected. Accounted for 22.4 of the total number of fish species, among which more than half of the endemic fish species. Yibin River fishery fishing specifications are generally small, the majority of individual fishing weight is less than 100g. The body length is below 150mm. The catch per unit effort of Gill nets and small hooks in this section is only 1 kg / d per vessel. The fishery resources in Yibin reach have been seriously declined, and many endemic fish have become occasional species. In order to promote the protection of species and resources, the fishery catch is low and the fishing specification is too small.
【作者單位】： 江漢大學生命科學學院;中國水產(chǎn)科學研究院長江水產(chǎn)研究所;
【基金】：國家自然科學基金(51109091,51310105036) 湖北省教育廳科學技術(shù)研究項目(B2013150)
【分類號】：S932.4
【正文快照】： 長江上游是我國淡水魚類多樣性最為豐富的地區(qū)之一,該江段分布有魚類261種,其中特有魚類112種[1].隨著人類活動的加劇,長江上游魚類資源面臨著巨大威脅,過度捕撈、水利工程建設(shè)等對該江段魚類帶來了顯著影響[2].為保護長江上游寶貴的珍稀特有魚類資源及棲息生境,國家有關(guān)部門

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本文編號：1376109