U.S.GLOBEC: Seasonal Development of Stratified Water on Georges Bank: Dynamics of Zooplankton and Larval Fish

WPC4 2 B V P Z快递10cpi？X，{x 6 X@8；X@HP LaserJet III-更改HPIIILAS.PRS x@，\，||X@Courier 10cpi 2@Z F P#|x@8；X@HP LaserJet IIID CHANGE HPLASIII.PRSx@，\，MX@#|x 2 2 9313671 Beardsley目前的证据表明，乔治斯浅滩地区具有商业重要性的鱼类幼体的补充和存活严重取决于春季和夏季层结的发展。预测的气候变化情景可能会显著影响层结的演变，从而影响乔治海岸的幼虫存活。作为美国GLOBEC乔治斯银行研究的一部分，比尔兹利博士和他的合作者将在1995年1月8月期间进行一项密集的实地项目，旨在更好地了解乔治斯银行的层结发展及其对鱼类幼体生存的影响。初步研究将於一九九四年展开。该项目将有一个系泊仪器部分，涉及在整个水柱中部署气象传感器和仪器，在表层和底层边界层有大量集中。所获得的数据将被用来解决层化场并检查控制其发展的因素。船上的测量部分将包括五次巡航，跟踪目标物种的集中(补丁)：鳕鱼和黑线鳕幼体及其桡足类猎物，Calanus和Pseudocalanus。使用各种采样系统，包括漂流仪、MOCNESS、浮游生物录像机(VPR)、浮游生物泵和多个高频声学采样器，将测量：(1)水文、MICR和湍流，(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粒子运动和三维游泳行为，(4)与水柱分层和猎物分布有关的鳕鱼和黑线鳕幼体的摄食和生长。这些数据将与来自合作领域和模型研究的信息一起使用，以深入了解层化和湍流混合对浮游动物和鱼类种群生长和生存的影响。

WPC4 2 B V P Z Courier 10cpi ? x x x , { x 6 X @ 8 ; X @ HP LaserJet III-Change HPIIILAS.PRS x @ , \ , ||X @Courier 10cpi 2 @ Z F P #| x x @ 8 ; X @ HP LaserJet IIID hange HPLASIII.PRS x @ , \ , MX @ #| x 2 2 9313671 Beardsley Present evidence indicates that the recruitment and survival of commerically 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, micr oturbulence, and currents, (2) the vertical and horizontal distributions of the target species in relation to water column stratification, (3) passive particle motions and the three 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 growth and survival of zooplankton and fish populations.