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首页> 外文期刊>ICES Journal of Marine Science >Spatio-temporal overlap of hatching in Norwegian spring-spawning herring and the spring phytoplankton bloom at available spawning substrata
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Spatio-temporal overlap of hatching in Norwegian spring-spawning herring and the spring phytoplankton bloom at available spawning substrata

机译：挪威春季产卵鲱鱼的孵化时空重叠和可用产卵层春季浮游植物开花

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摘要

Analyses of bottom substrata demonstrated that a potential spawning area of 13 490 nautical miles~2 is available for Norwegian springspawning (NSS) herring on the Norwegian shelf between 59 and 71°N. However, the availability of suitable substrata differed significantly on a latitudinal scale; 60% of the available spawning area was north of 67°N. However, the spatial distribution of larvae indicated that the bulk of the adult population wintering off northern Norway in the period 1998 - 2007 migrated farther south and upstream to spawn. This suggests benefits attributable to extra costs accompanying the spawning migration. To test whether southern spawning is beneficial with regard to overlap between herring larvae and their prey, remotely sensed chlorophyll a data from SeaWiFS were used as a proxy for the onset of phytoplankton bloom (OSB) in discrete bins along the Norwegian coast and linked to interannual variation in the observed average timing of larval hatching during the years 1998-2007. There was a delay in OSB with increasing latitude of 37 d within the spawning habitat of NSS herring. Overlap between larval hatching and OSB was clearly highest in the south, suggesting that match with prey availability may be an important factor in the selection of spawning grounds by NSS herring.
机译：对底部底层的分析表明，在59至71°N之间的挪威陆架上，挪威春季产卵（NSS）鲱鱼的潜在产卵区为13490海里〜2。但是，在纬度范围内，合适的基质的可用性差异很大。 60％的可用产卵区域位于67°N以北。但是，幼虫的空间分布表明，在1998年至2007年期间，挪威北部越冬的成年种群大部分向更南和更上游迁移。这表明由于产卵迁移而产生的额外费用可带来好处。为了测试南方产卵对鲱鱼幼虫与其猎物之间的重叠是否有益，使用遥感WildFS的数据，将SeaWiFS的数据用作挪威沿海离散仓中浮游植物开花（OSB）的代表，并与年际关联1998-2007年间观察到的幼体孵化平均时间的变化。在NSS鲱鱼产卵栖息地中，随着南纬37 d的增加，OSB出现了延迟。在南部，幼体孵化和OSB之间的重叠明显最高，这表明与猎物的可用性匹配可能是NSS鲱鱼选择产卵场的重要因素。

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