三峡集团:首批子三代中华鲟诞生|无码午夜精品一区二区三区视频

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  中新社宜昌11月26日电 三峡集团26日发布消息,首批全人工繁殖的子三代中华鲟近日在三峡集团长江珍稀鱼类保育中心诞生。这是业内首次实现子三代中华鲟全人工繁殖,标志着今后可不依靠野生亲鱼实现中华鲟持续保种和规模化繁育。

  三峡集团所属长江生物多样性研究中心高级工程师郭柏福介绍,此次参与繁殖的亲鱼为该中心自主培育的子二代中华鲟,其中雌鱼13龄、雄鱼14龄。为确保繁育质量,科研团队早在年初便对亲鱼进行了严格筛选,经过长达数月的营养强化与环境模拟调控,于11月6日、7日实施人工催产。该批鱼卵人工授精结果理想,受精率高达95%以上,经过5天孵化,获得子三代幼苗11.2万尾。

  “子三代的诞生,证实了子二代中华鲟完全具备在人工环境下成熟并繁育后代的能力。”长江生物多样性研究中心副主任、中华鲟研究所总工程师姜伟表示,未来,保有量更大的子二代中华鲟将接替子一代,成为繁育主力。人工种群建设将进一步打破“产能”瓶颈,进入“可持续、规模化繁育”的新阶段。

  针对外界关切的“中华鲟在人工环境里是否长得好,能成熟”这一问题,三峡集团国家工程中心首席专家兼长江生物多样性研究中心主任、武汉大学教授常剑波表示,中华鲟在自然界完成生活史需要经历“河海洄游”的复杂过程,科研团队参考中华鲟海淡水洄游环境下的核心要素,精准调控营养、光照、水流、水温等关键条件,并采取措施减少应激反应,建立中华鲟群体繁育技术体系并不断完善,在实现“40年育三代”的进程中取得丰硕成果。(完)

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