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

小行星9613596 对芬兰哲水蚤和伪哲水蚤的丰度和生产率进行了研究。已经观察到，在乔治浅滩的浅混合良好的波峰沃茨与东北峰和南翼的较深沃茨之间存在很大差异。该项目将调查的假设，不同的物理过程，控制平流的水和浮游动物从缅因州的海湾到不同地区的银行在冬季，和不同的生长和死亡模式的目标桡足类物种在银行的不同地区，调节人口规模，他们在春季和初夏达到。作为美国GLOBEC西北大西洋实地研究的一部分，该项目的第2阶段计划将重点关注Calanus finmarchicus和Pseudocalanus spp.的产卵、生长和死亡率。本项目将确定：（1）冬/春季节乔治浅滩的哲水蚤和拟哲水蚤的补充情况，并根据大规模调查中采集的无节幼体和早期桡足类样品的分布情况进行推断;（2）优势桡足类产卵量和出生率的空间、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;（4）卵和无节幼体死亡率是否与潜在捕食者的丰度相关。 ***

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. ***