U.S.-GLOBEC: Vertical Distribution of Small Zooplankton During Turbulance Profiling on Georges Bank

小行星9313671 目前的证据表明，在乔治银行地区的商业上重要的鱼苗的招聘和生存严重依赖于在春季和夏季期间的分层的发展。 预测的气候变化情景可能会显着影响分层的演变，从而影响幼虫的生存乔治银行。 作为美国GLOBEC乔治银行研究的一部分，比尔兹利博士和合作者将在1995年1月至8月期间进行一项密集的实地项目，旨在更好地了解乔治银行分层的发展及其对仔鱼生存的影响。 初步研究将于1994年开始。 该项目将有一个系泊仪器部分，将涉及在整个水柱中部署气象传感器和仪器，并在表面和底部边界层中高度集中。 所获得的数据将用于解决分层场和检查控制其发展的因素。 船上测量部分将包括五次巡航，跟踪目标物种的集中（斑块）：鳕鱼和黑线鳕幼虫及其桡足类猎物、哲水蚤和伪哲水蚤。 使用各种采样系统，包括漂流器、MOCNESS、视频浮游生物记录仪（VPR）、浮游生物泵和多高频声学采样器，将对以下内容进行测量：（1）水文学、微湍流和海流，（2）与水柱分层有关的目标物种的垂直和水平分布，（3）浮游动物个体的被动运动和三维游动行为;（4）鳕鱼和黑线鳕幼鱼的摄食和生长与水体分层和猎物分布的关系。 这些数据将与来自合作领域和建模研究的信息一起使用，以深入了解分层和湍流混合对浮游动物和鱼类种群生长和生存的影响。

9313671 Beardsley Present evidence indicates that the recruitment and survival of commercially important fish larvae within the Georges Bank region depends critically on the development of stratification during the spring and summer period. Predicted climate change scenarios are likely to significantly influence the evolution of stratification and thus impact larval survival over Georges Bank. As part of U.S. GLOBEC Georges Bank Study, Dr. Beardsley and collaborators will conduct an intensive field project during January-August, 1995 aimed at better understanding the development of stratification over Georges Bank and its influence of larval fish survival. Preliminary studies will be initiated in 1994. The project will have a moored instrument component will involve deploying meteorological sensors and instruments throughout the water column, with a heavy concentration in the surface and bottom boundary layers. The data acquired will be used to resolve the stratification field and examine factors controlling its development. The shipboard measurement component will consist of five cruises following a concentration (patch) of the target species: cod and haddock larvae and their copepod prey, Calanus and Pseudocalanus. Using a variety of sampling systems,including drifters, MOCNESS, the Video Plankton Recorder (VPR), plankton pump, and multiple- high-frequency acoustical samplers, measurements will be made of: (1) hydrography, microturbulence, and currents, (2) the vertical and horizontal distributions of the target species in relation to water column stratification, (3) passive particle motions and the tree-dimensional swimming behaviors of individual zooplankton, and (4) the feeding and growth of larval cod and haddock in relation to water column stratification and prey distribution. The data will be used together with information from collaborative field and modeling studies to gain insights into the impact of stratification and turbulent mixing on gro wth and survival of zooplankton and fish populations.