裸腹鲟人工繁殖技术研究初报
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户国(1984–),男,博士,副研究员,主要从事水产种质资源与遗传育种研究.E-mail:huguo@126.com

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S961

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农业财政专项“西北地区重点水域渔业资源与环境调查”; 伊犁哈萨克自治州科技计划项目“伊犁河珍稀濒危鱼类裸腹鲟人工繁育技术研究”.


Technical report for controlled propagation of the critically endangered ship sturgeon (Acipenser nudiventris) in the Ili River
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    摘要:

    裸腹鲟(Acipenser nudiventris)曾广泛分布于欧洲的黑海、亚速海和中亚的里海、咸海, 以及上述区域的一些河流中, 在中国仅自然分布于新疆伊犁河流域, 被世界自然保护联盟《濒危物种红色名录》列为极危物种, 是《濒危野生动植物种国际贸易公约》附录二保护物种, 也是我国的国家二级保护野生动物, 新疆维吾尔自治区一级保护野生动物。受多种因素影响, 伊犁河流域野生裸腹鲟已濒于绝迹。本研究对人工驯养条件下的伊犁河裸腹鲟成年个体开展了人工繁殖、胚胎发育和苗种培育等方面的研究。在共计 13 尾野生裸腹鲟中, 有 2 尾雌鱼和 3 尾雄鱼性腺发育达到了 IV 期, 采用 LHRH-A2 对性腺发育至 IV 期的 2 尾雌鱼和 3 尾雄鱼实施了人工催产和授精, 获卵 12 万粒, 受精率为 55%。在 15~17 ℃的孵化条件下, 裸腹鲟仔鱼经 5~7 d 孵出, 获得裸腹鲟鱼苗约 25200 尾, 孵化率 42.5%。

    Abstract:

    According to the Red List of Threatened Species by the International Union for Conservation of Nature (IUCN) (www.iucnredlist.org), almost all sturgeon species are at risk of extinction, being identified as the most endangered species in the world. The ship sturgeon (Acipenser nudiventris) is classified as critically endangered. However, unlike the rapid decline of wild populations, sturgeon farming is rapidly increasing in the China Mainland, being the country with the largest sturgeon aquaculture with a production amount of approximately 97,000 tons in 2018. This figure is greater than 80% of the total amount of aquaculture production globally. The ship sturgeon is a large sturgeon with good egg quality and high caviar price, and the controlled propagation of this species is of great significance to conservation biology and aquaculture. The ship sturgeon is the only native sturgeon species that lives in the Ili River Basin of Xinjiang in China. The wild sturgeon populations in the Ili River have sharply decreased in recent decades, similar to the decline seen in other areas. It is a national second-class protected wild animal in China and a first-class protected wild animal in the Xinjiang Uygur Autonomous Region. Collecting wild individuals to implement controlled propagation technology under domestic conditions is the best strategy to save this species. In this study, 13 juvenile fish were collected from the Ili River and farmed in flowing ponds for many years. Among them, two females and three males reached stage IV gonadal maturity, and the controlled reproduction, embryonic development, and fry breeding of these fish were studied. LHRH-A2 was used to successfully induce spawning and insemination, and 120,000 eggs were collected. The fertilization rate was about 50%. Under the incubation conditions of 15–17 ℃, the larvae hatched for approximately 5–7 d, and more than 25200 newly hatched larvae were obtained, with a survival rate of 42%. The successful controlled propagation of A. nudiventris in the Ili River has laid a solid foundation of technology and experimental materials for conservation and population retrieval.

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户国,纪锋,郑鹏,贾东升,吕伟华,王念民,张颖.裸腹鲟人工繁殖技术研究初报[J].中国水产科学,2021,28(4):403-410
Hu Guo, Ji Feng, Zheng Peng, Jia Dongsheng, Lv Weihua, Wang Nianmin, Zhang Ying. Technical report for controlled propagation of the critically endangered ship sturgeon (Acipenser nudiventris) in the Ili River[J]. Journal of Fishery Sciences of China,2021,28(4):403-410

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  • 在线发布日期: 2021-04-12
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