U.S. GLOBEC: Laboratory and Field Studies of Impacts of Invertebrate Predators on Fish Eggs and Larvae on Georges Bank

作为美国GLOBEC西北大西洋野外研究的一部分，该项目第二阶段将进行实验室和野外研究，研究无脊椎捕食者对乔治海岸鱼卵和幼虫的影响。与捕食有关的死亡率是影响乔治海岸鱼类和桡足类目标物种种群的一个损失项。该项目将利用中生态实验来确定浮游水生生物的猎物选择和取食率，有时是该地区最丰富的捕食者，而栉水母，Pleurobrachia pileus，是唯一被证实以鳕鱼卵和幼虫为食的无脊椎动物。这个项目的野外部分将提供关于水螅类和其他无脊椎捕食者及其猎物的丰富数据。这些实验室和野外的结果将结合起来，在聚集或分散浮游生物的物理机制的背景下，估计与捕食有关的死亡率。＊＊＊

9632395 SULLIVAN As part of the U.S. GLOBEC Northwest Atlantic Field Studies, Phase 2 program this project will conduct laboratory and field studies of impacts of invertebrate predators on fish eggs and larvae on Georges Bank. Predation-related mortality is one loss term affecting populations of the target species of fishes and copepods on Georges Bank. This project will utilize mesocosm experiments to determine prey selection and feeding rates of the planktonic hydroid, Clytia gracilis, at times the most abundant predator in this region, and the ctenophore, Pleurobrachia pileus, the only invertebrate confirmed to be feeding on eggs and larvae of cod. The field component of this project will provide abundance data on hydroids and other invertebrate predators and their prey. These laboratory and field results will be combined to estimate predation- related mortality in the context of physical mechanisms that act to concentrate or disperse plankton. ***