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首页> 外文期刊>ICES Journal of Marine Science >Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua)
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Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua)

机译：大西洋鳕鱼的捕获方法，条件和饮食模式之间的相关性

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With seal populations increasing significantly in the Baltic Sea, the conflict between seals and fisheries is growing. The most sustainable method for mitigating the seal-fishery conflict is to develop and use seal-safe fishing gear. Although pots have been shown to be a promising alternative to gillnets for catching cod (Gadus morhua), there are indications that cod caught in pots are in poorer condition than those caught in gillnets, potentially making the pots a less-economical alternative. This study investigates whether this difference in condition is consistent over larger spatial scales. Gear-specific cod condition was related to both short-term (determined from stomach contents) and long-term (determined by stable isotope analysis) diet composition. Results indicate that differences in fish condition between gear types are consistent over large areas, possibly due to temporal and spatial differences in feeding strategies. We argue that condition differences between pot- and gillnet-caught cod may be driven by differences in behavioural traits. Consequently, fishing with a certain gear type may have ecological consequences affecting population characteristics, with implications for fisheries management. From the perspective of the seal-fisheries conflict, pots may ultimately have consequences on the catch value of fish.
机译：随着波罗的海海豹种群的大量增加，海豹与渔业之间的冲突正在加剧。减轻海豹与渔业冲突的最可持续的方法是开发和使用海豹安全的渔具。尽管已显示出用锅代替捕捞鳕鱼的刺网是一种有前途的替代方法，但有迹象表明，用捕捞锅捕捞的鳕鱼的状况要比用刺网捕捞的鳕鱼要差，这有可能使该锅成为一种较不经济的选择。这项研究调查了这种条件差异是否在较大的空间尺度上是一致的。渔具特有的鳕鱼状况与短期（通过胃内容物确定）和长期（通过稳定同位素分析确定）的饮食组成有关。结果表明，大面积区域中渔具类型之间鱼类状况的差异是一致的，这可能是由于进食策略的时间和空间差异所致。我们认为，捕捞的鳕鱼和刺网鳕之间的条件差异可能是由行为特征的差异所驱动。因此，使用某种渔具进行捕鱼可能会对人口特征产生生态影响，从而影响渔业管理。从海豹渔业冲突的角度来看，盆最终可能对鱼的捕捞价值产生影响。

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