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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
Address:College of Life Sciences, Sichuan University, No.29, Wangjiang Road, Chengdu, Sichuan Province, 610064, China
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Your Position :Home->Past Journals Catalog->2020 Vol.39 No.2

Technologies for Reproduction of the Third Generation of Acipenser dabryanus in Captive
Author of the article:DU Hao1#, LUO Jiang1#, ZHOU Liang2#, XIONG Wei1, WU Jinping1, QIAO Xinmei1, LENG Xiaoqian1, XIAO Xinping1, TONG Shuang1, LIU Zhigang1, WEI Qiwei1*
Author's Workplace:1. Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture and Rural Affairs of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China;
2. Rare Aquatic Animal Research Institute, Yibin, Sichuan Province 644000, China
Key Words:Acipenser dabryanus; gonad development; artificial propagation; the third generation
Abstract:Through more than 20 years efforts in saving the critically endangered Dabry's sturgeon (Acipenser dabryanus) in captive, the third generation of this sturgeon have been successfully reproduced in 2018 at the first time. Six male and female parents A. dabryanus of the second generation with an average body mass of (17.02±4.97) kg, and (20.57±3.23) kg, respectively, were selected by B-ultrasonic technique which can identify the development stage of gonad, from a propagation group with an age of 6-8 years old. The artificial spawning was conducted when the water temperature reached to 19-20 ℃, 5 male and 2 female fish were induced successfully. A total of 9×104 eggs with an average diameter of (2.65±0.19) mm were obtained. The fertilized rate was 87.53%, and the hatching rate was 76.14%, about 6×104 hatching-out larvae were finally produced with a body length of (0.91±0.06) cm and a body mass of (0.021±0.003) g, and 3×104 larvae were remained after initial-feeding. The body mass of the larvae increased exponentially shown as W=0.108 1e0.333 2t(R2=0.931 8, n=105, P<0.01), and the body length of the larvae increased linearly shown as L=1.087 8t-1.746 2 (R2=0.986 1, n=105, P<0.05), and the correlation between body mass and body length was shown as W=0.040 6L2.308 9 (R2=0.991 1, n=105, P<0.01). The success of breeding the third generation is a big breakthrough in the ex situ conservation of A. dabryanus, it indicates that the continuable artificial population of A. dabryanus was established and the preservation of A. dabryanus was succeesfully, and it will contribute to further restoration and utilization of nature resource.
2020,39(2): 197-203 收稿日期:2019-11-24
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