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

本项目解决了美国GLOBEC机会公告的回顾问题。研究人员将分析1995年和1998年夏季由国家海洋渔业局收集的声学和辅助水文和地形数据，着眼于检查黄鳍鱼斑块和鱼群的空间分布，因为它们与海底地形、上升流、流速、分层和浮游植物生物量有关。此外，研究人员将参与并分析2001年在同一地区（加利福尼亚州蒙特雷至加拿大不列颠哥伦比亚省夏洛特女王群岛）收集的数据。研究人员将研究一系列关于俄勒冈州布兰科角北部大陆架断裂附近的大型暖水藻斑块可能存在关联的假设，这些斑块具有最小的沿岸和陆上-近海洋流，大型浮游植物生物量和指向大陆架断裂的上升流驱动的洋流。科学家们还将测试一些假设，包括关于黄鳍金枪鱼与一种主要捕食鱼——太平洋白鲑的接近程度，以及它是如何在布兰科角从南到北变化的，沿着海底峡谷边缘可能增强的黄鳍金枪鱼密度，以及厄尔尼诺现象对黄鳍金枪鱼和白鳍金枪鱼分布和丰度的影响。分析后的数据将构成基线数据集，供正在进行的和拟议的全球环境监测系统监测和进程研究使用。

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.