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首页> 外文期刊>ICES Journal of Marine Science >Relationship between phytoplankton production and cod production on the Faroe Shelf
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Relationship between phytoplankton production and cod production on the Faroe Shelf

机译：法罗架上浮游植物产量与鳕鱼产量之间的关系

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摘要

Phytoplankton production on the Faroe Shelf varied dramatically from 1990 to 2003 and a close empirical relationship between phytoplankton production and cod production is demonstrated in this study. The large fluctuations of the biomass of the Faroe Plateau cod stock in the 1990s seem to be explained by variations in primary production, i.e. by a fluctuating carrying capacity of the Faroe Shelf ecosystem. The causal mechanism seems to be a positive relationship between phytoplankton production, zooplankton production and production of food organisms for cod (e.g. benthic crustaceans and especially sandeels). The year-class strength of Faroe Plateau cod seems to be determined during their second winter, corresponding to the time when they leave the nearshore nursery areas and enter the feeding areas of adult cod. The regulating factor seems to be abundance of suitable food organisms for small cod, which seems to be a result of total food availability (determined by the phytoplankton production) and competition from older cod, i.e. density-dependent recruitment. The individual growth of cod older than 2 years seems to be a result of the total food availability and the stock size of cod, i.e. density-dependent growth. Implications for stock assessment and management are discussed.
机译：从1990年到2003年，法罗架上的浮游植物产量发生了巨大变化，这项研究证明了浮游植物产量与鳕鱼产量之间存在密切的经验关系。 1990年代法罗高原鳕鱼种群生物量的巨大波动似乎可以通过初级生产的变化来解释，即法罗群岛大陆架生态系统的承载能力波动。浮游植物的生产，浮游动物的生产与鳕鱼食用生物的生产（例如底栖甲壳类动物，尤其是sand鱼）之间的因果关系似乎是正相关的。法罗高原鳕鱼的年级强度似乎是在他们的第二个冬季确定的，这对应于他们离开近岸苗圃区并进入成年鳕鱼取食区的时间。调节因素似乎是适合小型鳕鱼的食物生物，这似乎是总食物供应量（由浮游植物的产量决定）和来自较老鳕鱼竞争的结果，即依赖密度的补充。超过2年的鳕鱼个体生长似乎是总食物供应量和鳕鱼种群规模的结果，即密度依赖性生长。讨论了对库存评估和管理的影响。

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