Dvoretsky Alexander G, Dvoretsky Vladimir G
Murmansk Marine Biological Institute of the Russian Academy of Sciences (MMBI RAS), 183038 Murmansk, Russia.
Animals (Basel). 2025 Jan 4;15(1):99. doi: 10.3390/ani15010099.
Stock-recruitment relationships depend on the total abundance of females, their fecundity, and patterns of their maturation. However, the effects of climatic conditions on the abundance, biomass, and mean weight of female red king crabs, , from the introduced population (Barents Sea) have not yet been studied. For this reason, we analyzed long-term fluctuations in stock indices and the average weight of an individual crab in a small bay of the Barents Sea and related these parameters to the dynamics of temperature conditions (temperature in January-December, mean yearly temperature, and temperature anomaly) in the sea. The average weight of a crab at age 6-9 had strong negative correlations with water temperature at lags 8 and 9, indicating faster female maturation in warm periods. Positive relationships were registered between temperature and stock indices for 15-19-year-old females at lag 4 and for 10-14-year-old females at lag 10, supporting the idea of higher survival rates of juveniles and their rapid development being a response to a pool of warm waters. Both redundancy and correlation analyses revealed seawater temperatures in June-August being the most important predictors of female abundance and biomass, indicating that favorable temperature conditions in the first 3 months of crab benthic life result in high survivorship rates for red king crabs.
种群补充关系取决于雌性个体的总丰度、繁殖力及其成熟模式。然而，气候条件对引进种群（巴伦支海）雌性红帝王蟹的丰度、生物量和平均体重的影响尚未得到研究。因此，我们分析了巴伦支海一个小海湾的种群指数长期波动情况以及单只螃蟹的平均体重，并将这些参数与该海域温度条件（1月至12月的温度、年平均温度和温度异常）的动态变化相关联。6至9龄螃蟹的平均体重与滞后8个月和9个月时的水温呈强烈负相关，这表明温暖时期雌性成熟速度更快。在滞后4个月时，15至19龄雌性的温度与种群指数之间呈正相关，在滞后10个月时，10至14龄雌性的温度与种群指数之间呈正相关，这支持了幼体较高的存活率及其快速发育是对一片温暖水域的反应这一观点。冗余分析和相关性分析均表明，6月至8月的海水温度是雌性丰度和生物量的最重要预测指标，这表明螃蟹底栖生活的前三个月适宜的温度条件会导致红帝王蟹的高存活率。
