Title: Reproductive Biology of Schizothorax o'connori (Cyprinidae: Schizothoracinae) in the Yarlung Zangbo River, Tibet
Abstract:2test, p < 0.05). Using a logistic regression, it was determined that the standard lengths at 50% maturity were 304 mm for males and 389 mm for females; the ages at 50% maturity were 8 yr for males an...2test, p < 0.05). Using a logistic regression, it was determined that the standard lengths at 50% maturity were 304 mm for males and 389 mm for females; the ages at 50% maturity were 8 yr for males and 10 yr for females. Based on the monthly proportions of macroscopic gonadal maturity stages and monthly variations in the gonadosomatic index, S. o’connori spawned over a short period, from Feb. to Apr. with a peak in Mar. Females had heavier livers than males for a given eviscerated weight (ANCOVA, p < 0.05). According to the size distribution of oocytes, S. o’connori appeared to show a high degree of spawning synchronicity. The estimated values of fecundity ranged 8228-39,343 (21,190 ± 6990) eggs/fish. The relative fecundity ranged 6.2-22.2 (14.3 ± 3.3) eggs/g of fish. The fecundity of S. o’connori increased linearly with the standard length and total weight, but had no significant correlation with age. http://zoolstud.sinica.edu.tw/Journals/51.7/1066.pdfRead More
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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Cited By Count: 14
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