Possible effects of global warming on fish recruitment: shifts in spawning season and latitudinal distribution can alter growth of fish early life stages through changes in daylength
Possible effects of global warming on fish recruitment: shifts in spawning season and latitudinal distribution can alter growth of fish early life stages through changes in daylength
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全球变暖对鱼类补充的可能影响：产卵季节和纬度分布的变化可以通过日照长度的变化改变鱼类生命早期阶段的生长
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发表时间：
2011
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通讯作者：
Koji Hirakawa
中科院分区：
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作者：
J. Shoji;Shun;Ken;Y. Kamimura;Masakazu Hori;Koji Hirakawa
书名：Shoji，J.，Toshito，S.，Mizuno，K.和Kamimura，Y.，Hori，M.，Hirakawa，K.全球变暖对鱼类补充的可能影响：产卵季节和纬度分布的变化可以通过改变日长来改变鱼类早期生命阶段的生长。-ICES海洋科学杂志，68：1165-1169。在全球变暖导致海洋温度上升后，预计增长率、产卵季节的变化以及产卵区域(纬度)的变化。鱼类可以通过产卵区域的极地移动和产卵时间的临时转移来避免更高的温度。然而，这些变化将包括它们在早期生命阶段经历的日长变化。为了全面了解全球变暖对鱼类补充的可能影响，在野外和实验室条件下，研究了温度和日长对西北太平洋西部沿海优势种黑岩鱼的生长、日摄食量和生长效率的影响。在11.1~21.3℃温度范围内，生长速率较高，在16℃时生长效率最高。光周期对生长的影响也很大，日照时间越长，生长越快。产卵季节和产卵面积变化的影响因鱼类种类和产卵季节不同而不同。比较了不同日长条件下陈氏对虾和高山对虾的早期生长，结果表明，产卵季节和产卵面积的变化对与日长变化有关的鱼类早期生命阶段(FELSS)的影响不同。产卵区向极地移动导致的日长变化将对夏季和冬季生长的FELS产生相反的影响，并且这种影响在高纬度地区更加明显。
Shoji, J., Toshito, S., Mizuno, K., and Kamimura, Y., Hori, M., Hirakawa, K. 2011. Possible effects of global warming on fish recruitment: shifts in spawning season and latitudinal distribution can alter growth of fish early life stages through changes in daylength. – ICES Journal of Marine Science, 68: 1165–1169.Changes in growth rates, shifts in the spawning season, and shifts in the spawning area (latitude) are expected after an increase in sea temperature resulting from global warming. Fish can avoid higher temperatures by a poleward shift in the spawning area and a temporal shift in spawning timing. However, these shifts will include changes in daylength experienced during their early life stages. To understand comprehensively the possible effects of global warming on fish recruitment, effects of temperature and daylength on growth, daily ration, and growth efficiency of black rockfish, Sebastes cheni, a dominant species in coastal waters of the western North Pacific, were examined under wild and laboratory conditions. The growth rate was elevated at higher temperatures between 11.1 and 21.3°C. Growth efficiency was highest at 16°C. The effect of photoperiod on growth was also significant, with enhanced growth resulting from the longer daylength. The effect of shifts in spawning season and spawning area would differ among fish species and spawning season. Comparison of early growth under different daylength conditions between S. cheni and ayu, Plecoglossus altivelis altivelis, indicated that the shifts in spawning season and spawning area would have different effects on fish early life stages (FELSs) related to changes in daylength. Changes in daylength resulting from a poleward shift in the spawning area will have opposite effects for summer- and winter-growing FELSs, and the effects are more prominent at higher latitudes.