粗唇高原鳅生物学研究

摘要

This article reports the biology of Triplophysa crassilabris collected at Xiaman village , Ruoergai County ,and Muke Township ,Hongyuan district in Western Sichuan Plateau from June to July in 2011 and August in 2013 .The sampled fish had body length (L) from 39 .0 mm to 71 .3 mm and body weight (m) from 0 .68 g to 4 .57 g ,and was divided into five age classes ,with the majority of 3 years old class . T . crassilabris feeds mainly on algae , plant debris and insect larvae , and showed homometric growth .The condition factor was found to be increased in the female individuals from 1 year old to 3 years old ,and to be decreased gradually with age 3 years old towards . The male individuals had elevated condition factor within 1 year old and 2 years old and afterwards gradual decrease with age .The fish spawn in batch from early June to mid -August in the aquatic plants and gravels .The fish had adhesive eggs , with absolute fecundity ranging from 922 to 4436 ,increasing as increase in age .%对2011年6—7月和2013年8月，采自川西高原若尔盖县辖曼乡和红原县木柯乡的粗唇高原鳅（164尾）生物学进行了研究。所获标本体长39．0～71．3 mm ，体质量0．68～4．57 g。分为5个年龄组，其中3龄占多数。以藻类、植物碎屑和昆虫幼虫为食。属均匀生长型鱼类。雌鱼个体的 Fulton肥满度在1～3龄阶段随年龄的增加而增加，3龄以后随年龄增长而逐渐减小。雄鱼个体的Fulton肥满度在1～2龄阶段随年龄的增加而增加，2龄以后随年龄增长而逐渐减小。产卵期为6月初到8月中旬，分批产卵，卵产于水草和石块上，卵为黏性卵。绝对怀卵量为922～4436粒，随着年龄的增加，绝对怀卵量逐渐增多。