U.S. GLOBEC Phytoplankton and Protozoa in the Diets of Copepods and Larval Cod on Georges Bank

9313679 Sieracki该项目是美国-GLOBEC西北大西洋计划支持下的多学科、多研究者计划的一个组成部分。在这项提案的序言中描述的整个计划，建议研究导致在乔治斯海岸招募鳕鱼、黑线鳕及其食物资源的生活史和生命生理率。具体地说，该项目力求定量和定性地描述乔治斯浅滩的纳米和微型浮游生物捕食场，并测量大西洋鳕鱼早期生活史阶段Gadus morhua及其主要捕食物种之一Calanys finmarchicus在不同水柱混合和层积条件下对纳米和微型浮游生物(即2-200微米大小的植物和动物猎物)的消耗。消费者的摄取率将在船上使用天然猎物组装的实验中直接测量。杂食性摄食对消费者的直接影响将在就地捕食场和物理状态(混合与分层)的背景下进行解释。最终，将在其他研究人员对消费者分布、状况、生活史参数和生产的测量的背景下，合作解决消费者饮食中植物与动物猎物的影响。***

9313679 Sieracki This project represents one component of a multidisciplinary, multi-investigator program under the aegis of the U.S.-GLOBEC Northwest Atlantic initiative. The overall program, described in the Prologue to this proposal, proposes to study the life histories and vital physiological rates leading to recruitment of cod, haddock, and their food resources on Georges Bank. Specifically, this project seeks to describe quantitatively and qualitatively the nano- and micro- plankton prey fields on Georges Bank and to measure consumption of nano- and microplankton organisms (i.e. plant and animal prey 2-200 um in size) by early life history stages of Atlantic cod, Gadus morhua, and by all copepodid life history stages of one of its major prey species, the calanoid copepod, Calanus finmarchicus, under various conditions of water column mixing and stratification on Georges Bank. Ingestion rates of consumers will be measured directly in shipboard experiments using natural prey assemblages. The proximate influence of omnivorous feeding on the consumers will be interpreted in the context of the in situ prey field and physical regime (mixing versus stratification). Ultimately, the influence of plant versus animal prey in consumer diet will be addressed collaboratively in the context of measurements made by other investigators of consumer distribution, condition, life history parameters and production. ***