The study provides new information on the reproductive biology of Hypselobarbus thomassi (Day, 1874) an endemic cyprinid fish in the Western Ghats–a biodiversity hotspot of India. A total of 384 specimens (males = 244 and females = 140) were collected monthly from April 2009 to March 2011 from Kallada River of Southern part of Western Ghats, India. Monthly sex ratio indicated that males predominated in the fishery, and an overall sex ratio was significantly different from the expected value of 1:1 (male:female = 1:0.57, x² = 28.17, p < .01). Based on the monthly analysis of gonadosomatic index (GSI) and the proportion of mature individuals, the spawning season of H. thomassi occurred between May to October with a peak in June to August. The length at first maturity (L₅₀) recorded was 290 mm TL in males and 330 mm TL in females. The absolute fecundity ranged between 305 (234 mm TL) to 1,089 (414 mm TL) and relative fecundity oscillated between 77.3–220.69 oocytes/g of fish. The fecundity established a linear relationship with total length, body weight and ovary weight. The findings of this study would be very effective to impose sustainable conservation plan for this threatened species in Kallada River and other Western Ghats river systems.

中文翻译：

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来自印度西高止山脉的卡拉达河的地方性塞浦路斯鲤鱼Hypselobarbus thomassi（Day，1874）的生殖生物学

这项研究提供了有关印度高加索地区（印度生物多样性热点）的地方性鲤科鱼类“ Hypselobarbus thomassi”（Day，1874年）的生殖生物学新信息。2009年4月至2011年3月，每月从印度西高止山脉南部的卡拉拉河采集384个标本（雄性= 244，雌性= 140）。月度性别比表明，男性在渔业中占主导地位，总体性别比与预期的1：1显着不同（男性与女性= 1：0.57，x ²  = 28.17，p  <.01）。基于生殖腺指数（GSI）的月度分析和成熟个体比例，产卵季节H. thomassi发生在5月到10月之间，并在6月到8月达到高峰。记录的第一次成熟时的长度（L ₅₀）在雄性中为290 mm TL，在雌性中为330 mm TL。绝对繁殖力在305（234 mm TL）至1,089（414 mm TL）之间，相对繁殖力在77.3–220.69卵母细胞/克鱼之间波动。生殖力与总长度，体重和卵巢重量建立线性关系。这项研究的结果对于在卡拉达河和其他西高止山脉河系中对该濒危物种实施可持续的保护计划将非常有效。