Collaborative Research: BEST Synthesis: The variable transport of pollock eggs and larvae over the Bering shelf - A marriage of physics and biology

最近的白令海生态系统研究（BEST）计划及其合作伙伴白令海综合生态系统研究计划（BSIERP）已经导致了更好地了解温度和分层在调节狭鳕种群中的作用，但平流的作用仍然知之甚少。因此，提供资金，以阐明如何海洋？白令海东部陆架上狭鳕（Theragra chalcogramma）卵和幼体的分布受大气强迫的影响。所提出的方法建立在BEST-BSIERP计划下取得的进展的基础上，并将使用新的建模结果和最近的观察结果相结合，以检查狭鳕卵和幼虫的历史传播途径，并将模拟在各种情况下这些途径在未来可能发生的变化。在许多鱼类种群的生命周期中起着重要作用，因为早期的生命史阶段取决于从产卵区到合适的育苗场的准被动运输。卵和幼虫的漂移轨迹以及它们在产卵后最初几个月内遇到的物理和生物条件变化很大，并与区域和大规模气候条件有关。因此，大气和海洋的变化影响生存的早期生命阶段和由此产生的一年级强度的鱼类种群，如大眼鳕，在东部白令海峡架。 该项目的结果将提高我们对狭鳕物理和生物过程相互作用的理解，从而更好地管理这一重要渔业。

The recent Bering Sea Ecosystem Study (BEST) program and its partner the Bering Sea Integrated Ecosystem Research Program (BSIERP) have resulted in a better understanding of the roles of temperature and stratification in regulating the walleye pollock population, but the role of advection remains poorly understood. Therefore, funds are provided to elucidate how the ocean?s response to variable atmospheric forcing affects the distribution of walleye pollock (Theragra chalcogramma) eggs and larvae on the eastern Bering Sea shelf. The proposed approach builds on advances made under the BEST-BSIERP program and will use a combination of new modeling results and recent observations to examine historical dispersal pathways of pollock eggs and larvae and will simulate how these might change in the future under various scenarios.Advection, the transport of material or a property by the movement of a fluid, plays a major role in the life cycle of many fish populations because early life history stages depend on quasi-passive transport from spawning areas to suitable nursery grounds. Drift trajectories of eggs and larvae and the physical and biological conditions they encounter during the first few months after spawning are highly variable and are linked to regional and broad-scale climate conditions. Thus atmospheric and oceanographic variability affects the survival of early life stages and the resulting year class strength of fish populations, such as walleye Pollock, on the eastern Bering shelf. The results of this project will improve our understanding of the interactions of physical and biological processes on walleye Pollock and, consequently, lead to better management of this important fishery.