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首页> 外文期刊>Marine ecology progress series >Growth of juvenile American lobster Homarus americanus in a changing environment
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Growth of juvenile American lobster Homarus americanus in a changing environment

机译：在变化的环境中美洲龙虾美洲大螯虾的生长

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In recent years, the abundance of American lobster Homarus americanus stocks has increased exponentially in coastal Maine, which is likely due to increased recruitment, enhanced growth rates, and decreased predation. This study analyzed the effects of lobster size (12-19.9, 20-29.9, and 30-39.9 mm carapace length, CL) and temperature on growth rates using an 18 yr mark-recapture study in coastal Maine during a period of considerable warming in the Gulf of Maine. Our results showed that the smallest size class of lobsters grew significantly faster than the 2 larger size classes. Peak molt incidence occurred in June and September for all size classes. Greater percent growth measurements were significantly more frequent in warm years for the 12-19.9 mm CL size class, and were also found to be significantly more frequent in the spring season during warm years for all size classes combined. In addition, time at 50% molt probability for the 20-29.9 mm CL and 30-39.9 mm CL size classes was significantly shorter in warm years. This study represents one of the first documentations of growth of small juvenile American lobsters (<20 mm CL) in the wild, and provides evidence of how juvenile growth varies between warm and cold years. Collectively, our findings have implications for how warming sea water temperatures may affect lobster stock productivity, and are of value to lobster stock assessment models and resource management efforts.
机译：近年来，缅因州沿海地区的美国龙虾（美洲大螯虾）种群数量呈指数增长，这可能是由于增加了招募，增加了增长率以及减少了捕食。这项研究使用18年的标记捕获研究在缅因州沿海严重变暖期间对龙虾大小（12-19.9、20-29.9和30-39.9 mm甲壳长度CL）和温度对生长速率的影响进行了分析。缅因湾。我们的结果表明，最小尺寸的龙虾的生长速度明显快于两个较大尺寸的龙虾。所有规格等级的蜕皮高峰发生在六月和九月。对于12-19.9 mm CL尺寸等级，较高的生长百分比测量在温暖的年份明显更频繁，并且在所有尺寸等级组合的温暖年份，春季的测量频率也明显更高。此外，在温暖的年份中，尺寸为20-29.9 mm CL和30-39.9 mm CL尺寸等级的绒毛发生概率为50％时，时间显着缩短。这项研究代表了野生美洲小龙虾（<20 mm CL）生长的第一批文献之一，并提供了在寒冷和寒冷年间，青少年生长如何变化的证据。总的来说，我们的发现对海水温度升高如何影响龙虾种群生产力产生了影响，并且对龙虾种群评估模型和资源管理工作具有价值。

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