NEP GLOBEC: Mesoscale Euphausiid and Hake Distribution in the CCS and Their Relationship to Environmental Conditioning

该项目涉及美国GLOBEC机会公告的回顾方面。 研究人员将分析国家海洋渔业局1995年和1998年夏季收集的声学和支持水文和地形数据，着眼于研究磷虾斑块和鱼群的空间分布，因为它们与底部地形，上升流，流速，分层和浮游植物生物量有关。 此外，研究人员还将参与并分析2001年在同一地区（加利福尼亚州蒙特雷到不列颠哥伦比亚省夏洛特女王群岛，加拿大）。 研究人员将研究一系列假设，这些假设涉及俄勒冈州布兰科角以北陆架断裂附近的大型磷虾斑块与最小沿岸和近岸-离岸海流、大型浮游植物生物量和指向陆架断裂的上升驱动海流之间的可能联系。 科学家们还将测试有关磷虾类与主要捕食鱼类太平洋鳕鱼的接近程度的假设，以及它如何从布兰科角的南部向北部变化，沿着海底峡谷边缘的磷虾密度可能增加，以及厄尔尼诺现象对磷虾和鳕鱼分布和丰度的影响。 分析的数据将形成基线数据集，供正在进行的和拟议的GLOBEC监测和工艺研究使用。

This project addresses the Retrospective aspect of the U.S. GLOBEC Announcement of Opportunity. The researchers will analyze acoustic and supporting hydrological and topographic data collected in summer 1995 and 1998 by the National Marine Fisheries Service with an eye to examining the spatial distribution of euphausiid patches and fish shoals as they relate to bottom topography, upwelling, current velocity, stratification and phytoplankton biomass. Additionally, the researchers will participate in and analyze data collected in 2001 in the same area (Monterey, CA, to Queen Charlotte Islands, B.C., Canada). The researchers will examine a series of hypotheses concerning the possible association of large euphausiid patches near the shelf break north of Cape Blanco, Oregon, with minimum alongshore and onshore-offshore currents, large phytoplankton biomass and upwelling-driven currents directed towards the shelf break. The scientists will also test hypotheses about the proximity of euphausiids with a major predator fish, Pacific whiting, and how it changes south to north of Cape Blanco, the possible enhancement of euphausiid density along the edges of submarine canyons, and the effect of El Nino on both euphausiid and whiting distribution and abundance. The analyzed data will form a baseline data set for use by ongoing and proposed GLOBEC monitoring and process studies.