唐家河自然保护区鱼类区系变化及资源现状

发布时间：2018-11-13 08:26

【摘要】：于2013年8月和12月分别对四川省唐家河自然保护区的鱼类资源现状进行了调查,共采集鱼类标本622尾,隶属2目3科9种。渔获物分析表明:该保护区鱼类以鲤形目鲤科鱼类为主(占鱼类种数55.56%),主要由老第三纪原始类群和青藏高原类群两个区系组成,兼有少数东亚类群及北方冷水性鱼类分布;同历史文献资料相比,鱼类区系无明显变化;洛氏(Phoxinus lagowskii)和齐口裂腹鱼(Schizothorax prenanti)为优势种群,分别占渔获物总数的60.13%、36.50%;鱼类小型化现象严重,部分种群数量急剧下降甚至处于濒危状况;从适温性、栖息水层、食性等角度可将该保护区的鱼类划分为不同的生态类型。综合分析认为:保护措施不完善、小水电站的无序开发和鱼类资源的过度利用是该保护区鱼类资源量下降的主要原因。
[Abstract]:The present situation of fish resources in Tangjiahe Nature Reserve of Sichuan Province was investigated in August and December 2013. A total of 622 fish samples were collected, belonging to 2 orders, 3 families and 9 species. The catch analysis shows that the fish in this reserve are mainly Cyprinidae (55.56% of the fish species), which are mainly composed of the primitive group of the Old Tertiary and the Group of the Qinghai-Tibet Plateau. There are a few East Asian groups and cold water fishes in the north. Compared with the historical literature, there was no obvious change in the fish fauna, (Phoxinus lagowskii) and (Schizothorax prenanti) were the dominant species, which accounted for 60.13% of the total catch and 36.50% of the total catch, respectively. The phenomenon of fish miniaturization is serious, some populations decrease sharply and even are endangered, the fish in this reserve can be divided into different ecological types from the point of view of suitable temperature, perched water layer and feeding character. Comprehensive analysis shows that the main reasons for the decrease of fish resources in the reserve are the imperfect protection measures, the disorderly exploitation of small hydropower stations and the over-utilization of fish resources.
【作者单位】：西华师范大学生命科学学院西南野生动植物资源保护教育部重点实验室;
【基金】：国家自然科学基金项目(51309196) 四川省教育厅科研基金(13ZB0014)
【分类号】：S932.4

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