中国水产科学研究院机构知识库

Gender and gonadal maturity stage identification of captive Chinese sturgeon, Acipenser sinensis, using ultrasound imagery and sex steroids

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文献类型：外文期刊

作者： Du, Hao ¹ ; Zhang, Xiaoyan; Leng, Xiaoqian ¹ ; Zhang, Shuhuan ¹ ; Luo, Jiang ¹ ; Liu, Zhigang ¹ ; Qiao, Xingmei ¹ ; Ky ¹ ;

作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Minist Agr China, Key Lab Freshwater Biodivers Conservat, Wuhan 430223, Peoples R China

2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Minist Agr China, Key Lab Freshwater Biodivers Conservat, Wuhan 430223

关键词： Ultrasound;Sex steroid;Testosterone;Estradiol-17 beta;Chinese sturgeon;Sturgeon maturity stage

期刊名称：GENERAL AND COMPARATIVE ENDOCRINOLOGY （影响因子：2.822；五年影响因子：2.772 ）

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年卷期：

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收录情况： SCI

摘要： Long lifespan and late maturation make it difficult to establish gamete maturity and breeding age of captive endangered Chinese sturgeon, Acipenser sinensis. This greatly handicaps timely breeding and future conservation stocking efforts. We used ultrasound imagery and sex steroids to determine the gender and gonadal maturity stage of captive Chinese sturgeon (age, 10-17 years old). The echogenicity of the reproductive organs and the respective morphology of the gonads were described and two quantitative parameters p(o) (proportion of the ovary to the entire reproductive organs) and d (thickness of the reproductive organs) were measured to characterize sex and maturity stage of Chinese sturgeon. Females were accordingly placed fish into several categories: F-II (F-II(-), F-II, F-II(+)), F-III (F-III, F-III(+)) and F-IV (F-IV, F-IV(+)) and F-VI, and males as M-II, M-III, M-IV, M-V and M-VI,. The accuracy of gender and maturity stage determination provided by ultrasonographic methods was 72.7% for F-II(-) ovary (n = 11) and 76.2% for MII testis (n = 42). Accuracy of sex and maturity determination using only serum sex steroid of testosterone (T) and estradiol-17 beta (E-2) was low (58-73%, depending on maturity stage). However, when the two methods were used together, accuracy increased sharply, especially for immature (II stage) females. In summary, of 151 Chinese sturgeon, whose sex and maturity stage were independently confirmed, 88.1% (n = 133), 62.9% (n = 95), and 96.7% (n = 146) were successfully sexed and staged using ultrasound, sex steroids, or both methods, respectively. The results provide reliable non-invasive techniques for determining sex and gonadal maturation of captive Chinese sturgeon. These methods can track individual gonad characteristics over multi-year reproductive cycles, which will assist captive broodstock management, artificial reproduction, and future conservation stocking. (C) 2016 Elsevier Inc. All rights reserved.

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