New evidence may support the persistence and adaptability of the near-extinct Chinese sturgeon
New evidence may support the persistence and adaptability of the near-extinct Chinese sturgeon
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DOI：
10.1016/j.biocon.2015.11.006
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发表时间：
2016
影响因子：
5.9
通讯作者：
P. Zhuang;F. Zhao;Tao Zhang;Yong Chen;Jianyi Liu;Long-zhen Zhang;B. Kynard
中科院分区：
文献类型：
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作者：
P. Zhuang;F. Zhao;Tao Zhang;Yong Chen;Jianyi Liu;Long-zhen Zhang;B. Kynard
长江截流缩短了中华鲟的产卵迁徙距离和时间，改变了产卵地点，减少了产卵种群规模，缩小了产卵温度范围。2013年和2014年没有发现产卵活动的迹象，这引发了人们对该物种可能灭绝的担忧。然而，最近于2015年在长江口发现的四条野生中华鲟幼鱼表明，在短暂的产卵暂停之后，一些中华鲟鱼已经在长江中一个未知的地点恢复了产卵。这表明中华鲟鱼具有非凡的适应环境变化的能力。然而，在适应急剧变化的河流环境方面，它们似乎已经达到了极限。需要创新的保护努力，以提高这种极度濒危物种的生存机会。
Damming the Yangtze River has resulted in a shortened spawning migration distance and time period, created altered and fewer spawning locations, reduced spawning population size, and narrowed the spawning temperature range for the Chinese sturgeon,Acipenser sinensis. No sign of spawning activity was detected in 2013 and 2014, raising concern about the possible extinction of the species. However, the recent discovery of four wild juvenile Chinese sturgeon in the Yangtze Estuary in 2015 suggests that following a short time period when spawning was suspended, a few Chinese sturgeon have resumed spawning at an unknown location in the Yangtze River. This demonstrates that Chinese sturgeon have an extraordinary ability to adapt to environmental changes. However, they appear to have reached their limit in adapting to the drastically changed riverine environment. Innovative conservation efforts are needed to improve the chances for survival of this critically endangered species.