caa a22 4500 606228306 CHVBK 20210128101203.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10641-014-0293-0 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0293-0 Reproductive biology of Schizothorax waltoni (cyprinidae: schizothoracinae) in the yarlung zangbo river in Tibet, China [Elektronische Daten] [Xian-Jun Zhou, Cong-Xin Xie, Bin Huo, You-Jian Duan, Xin Yang, Bao-Shan Ma] The reproductive biology of Schizothorax waltoni (Cyprinidae: Schizothoracinae) was studied by examining 1,145 individuals collected between August 2008 and August 2009 in the Yarlung Zangbo River, Tibet. The population had a significantly higher proportion of females than males (χ2 test, p < 0.05). Using a logistic regression, it was determined that the standard lengths at 50% maturity were 369mm for males and 479mm for females; the ages at 50% maturity were 10.2years for males and 13.5years for females. Based on the monthly proportions of macroscopic gonadal maturity stages and monthly variations in the gonadosomatic index, S. waltoni spawned over a short period, from March to April with a peak in March According to the size distribution of oocytes, S. waltoni appeared to show a high degree of spawning synchronicity. The fecundity of S. waltoni increased linearly with the standard length, body weight and ovary weight, but had no significant correlation with age. The mean fecundity of 21693 and mean relative fecundity of 13.4 eggs per gram of fish body weight suggest that S. waltoni might be especially vulnerable to exploitation. Springer Science+Business Media Dordrecht, 2014 Reproductive biology nationallicence Fecundity nationallicence Histology nationallicence Spawning season nationallicence Schizothorax waltoni nationallicence Yarlung zangbo river nationallicence Tibet nationallicence Zhou Xian-Jun College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut Xie Cong-Xin College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut Huo Bin College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut Duan You-Jian College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut Yang Xin College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut Ma Bao-Shan Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, 430070, Wuhan, Hubei, China aut Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 597-609 0378-1909 98:2<597 2015 98 10641 https://doi.org/10.1007/s10641-014-0293-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0293-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhou Xian-Jun College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Xie Cong-Xin College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Huo Bin College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Duan You-Jian College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Yang Xin College of Fisheries, Huazhong Agricultural University, 430070, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Ma Bao-Shan Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, 430070, Wuhan, Hubei, China aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 597-609 0378-1909 98:2<597 2015 98 10641