Distribution and Length-weight Relationships of Glyptosternoid Fishes in the Drung River Basin, Yunnan  

独龙江流域鰋鮡鱼类分布特征及其体长与体重的关系(英文)

作　　者：孔德平[1] 潘晓赋[1] 杨君兴[1] 陈自明[1] 

机构地区：[1]中国科学院昆明动物研究所系统动物学研究室

出　　处：《Zoological Research》2005年第6期632-637,共6页动物学研究（英文）

基　　金：国家973项目(2003CB415103);中国科学院创新工程项目(KSCX2-1-09和KSCX2-SW-101B);国家自然科学基金重大行动计划项目(90411002)

摘　　要：Glyptosternoid fishes are a group of sisorid catfishes living in torrents of rivers mainly originating from the Qinghai-Tibet Plateau. Based on our survey in the Drung River Basin, seven collecting sites were investigated and 271 glyptosternoid fishes caught belong to three species （Pareuchiloglanis kamengensis, Exostoma labiatum and Oreoglanis mocropterus）. Features of the distribution of the three catfishes were assessed. More individuals of E. labiatum were caught in the lower reaches of the Drung River with fast water velocity and it might be more adapted to a torrent habitat. The relationships between standard length （L） and weight （W） for P. kamengensis, E. labiatum and O. macropterus were also studied, and the parameter b of the L-W relationship （W = aL^b） ranged between 2. 8201 and 3. 0131. From the present study, all the three catfish species grow allometrically and the growth type of E. labiatum is the closest to a symmetrical one.鰋鮡鱼类主要分布于青藏高原周边,是一群适合于急流生活的科鱼类。在独龙江流域7个点共采集271号鰋鮡鱼类标本(隶属鮡属、鰋属和异齿鰋属),结合各采集点数据绘制大鳍异齿鰋鮡藏鰋和扁头的分布直方图,结果显示,藏鰋(E.labiatum)在流速较快的独龙江下游各采集点的种群数量较上游高,更适应急流生境。同时研究了这3种鰋鮡鱼类的体长与体重的关系,参数b(W=aLb)的范围在2.8201和3.0131之间,均为异速生长;藏鰋的生长类型最接近等速生长。

关 键 词：CATFISH Drung River Basin Distribution feature LENGTH WEIGHT 

分 类 号：Q958[生物学—动物学] Q954