U.S. GLOBEC: Reproductive, Growth and Mortality Rates of Calanus and Pseudocalanus on Georges Bank

9613596研究了Finmarchicus和Pseudocalanus spp.的丰度和产量。据观察，乔治斯浅滩混合良好的浅水与东北峰顶和南翼较深的水域有很大的不同。该项目将调查这样一种假设，即控制冬季期间水和浮游动物从缅因湾流入海岸不同地区的不同物理过程，以及海岸不同地区目标桡足类物种生长和死亡模式的差异，调节它们在春季和初夏获得的种群规模。作为美国GLOBEC西北大西洋实地研究的一部分，该项目第二阶段计划将重点研究Calanus finmarchicus和Pseudocalanus spp.该项目将决定：(1)从大范围调查期间收集的无节幼体和早期桡足类的分布推断，在冬季/春季乔治斯浅滩招募Calanus和Pseudocalanus；(2)主要桡足类物种产卵和出生率的空间、季节和年际变化；(3)卵存活率、卵和无节幼体死亡率以及无节幼体发育率的空间、季节和内部变化；以及(4)卵和幼体死亡率是否与潜在捕食者的丰度有关。***

9613596 Ohman The abundance and production rates of Calanus finmarchicus and Pseudocalanus spp. have been observed to differ greatly between the shallow well-mixed crest waters of Georges Bank and the deeper waters of the northeast peak and the southern flank. This project will investigate the hypothesis that differing physical processes which control the advection of water and zooplankton from the Gulf of Maine onto different regions of the bank during the winter, and differences in growth and mortality patterns of the target copepod species within the different regions of the bank, regulate the population sizes they attain during the spring and early summer. As part of the U.S. GLOBEC Northwest Atlantic Field Studies, Phase 2 program this project will focus on egg production, growth, and mortality of Calanus finmarchicus and Pseudocalanus spp.. This project will determine: (1) the recruitment of Calanus and Pseudocalanus on Georges Bank during the winter/spring period, as inferred from the distribution of nauplii and early copepodites collected with pump samples during the broad scale surveys; (2) the spatial, seasonal and interannual variation in egg production and birth rates for the dominant copepod species; (3) the spatial, seasonal and internal variations in egg viability, egg and naupliar mortality rates, and naupliar development rates; and (4) whether egg and naupliar mortality rates are correlated with abundances of potential predators. ***