Diapause, Population Dynamics, and the Large-Scale Dispersal of Zooplankton

本研究将探讨人口动态的两个占主导地位的放牧桡足类物种，脊哲水蚤和厚真哲水蚤，在一个耦合的生物？印度洋西北部的物理模型。模型人口将包括滞育的第五桡足类阶段（CV），据信已演变为一个可预测的间歇性食物供应与上升流造成的季节性季风迫使该地区内的结果。本研究的主要目的是：1）确定桡足类Calanoides carinatus和Eucalanus crassus的个体发育迁移和滞育对于这些种群在西北印度洋和赤道印度洋的成功的意义，关于迁移的时间和与季风上升流相关的浮游植物水华的发生和消退;（2）验证了关于CV期滞育发生和解除机制的假说。carinatus和E. crassus;（3）以索马里大旋风为分布中心，确定物理平流在向阿曼海岸、亚丁湾和阿曼湾以及可能更远的地区如莫桑比克和爪哇输送种群中的重要性。carinatus和E.克拉苏

This study will examine the population dynamics of two dominant grazing copepod species, Calanoides carinatus and Eucalanus crassus, in the context of a coupled biological?physical model in the northwestern Indian Ocean. The model populations will include a diapausing fifth copepodite stage (CV) believed to have evolved as the result of a predictably intermittent food supply associated with upwelling caused by seasonal monsoonal forcing within the region. The primary objectives of this study are: 1) to determine the significance of ontogenetic migration and diapause of the copepods Calanoides carinatus and Eucalanus crassus for the success of these populations in the northwestern and equatorial Indian Ocean, with respect to timing of migration and onset and collapse of phytoplankton blooms associated with monsoonal upwelling; 2) to test hypotheses of mechanisms underlying the initiation and cessation of diapause in CV stage of C. carinatus and E. crassus; and 3) to ascertain the importance of physical advection in transporting populations to the Oman coast, Gulf of Aden and Gulf of Oman, and potentially more distant areas such as Mozambique and Java, using the Great Whirl off Somalia as the epicenter of distribution of C. carinatus and E. crassus.