US-GLOBEC: Recruitment and Production Rates of Calanus Finmarchicus and Pseudocalanus spp. on Georges Bank

小行星9313677 乔治银行的优势桡足类物种，哲水蚤finmarchicus，Pseudocalanus moultoni和P. newmani，显示出很强的年际变化的丰度，可能会显着改变能量流和仔鱼补充在不同的年份。 我们假设：（1）优势桡足类的补充变化反映了亲代种群的丰度和来源的年际差异，以及食物对成年雌性产卵率的影响：（2）区域气候的微妙变化强烈影响着控制缅因州湾哲水蚤亲代种群丰度和生产的过程;（3）在乔治浅滩，哲水蚤的生产率除春季盛花期外均为食物限制型，而冬/春季则为食物限制型。 因此，这两个物种将对乔治银行食物水平的季节性变化作出不同的反应。 我们建议调查两个主要方面的哲水蚤finmarchicus和伪哲水蚤种种群动态和生产的乔治银行，与上述假设： (1)冬季/春季期间，从大规模调查期间对无节幼体和早期桡足类进行定量采样的泵取样品推断，乔治银行的哲水蚤和伪哲水蚤的补充;（2）乔治银行的哲水蚤和伪哲水蚤的生长和产卵率，与过程巡航期间食物环境的小规模时空变化有关。

9313677 Durbin The dominant copepod species on Georges Bank, Calanus finmarchicus, Pseudocalanus moultoni and P. newmani, show strong interannual variation in abundance that may significantly alter energy flow and larval fish recruitment in different years. We hypothesize that: (1) Recruitment variability in the dominant copepods reflects interannual differences in the abundance and source of the parental stock, and to the effect of food upon the egg laying rates of adult females; (2) Subtle changes in regional climate strongly influence processes controlling the abundance and production of the parental stock of Calanus in the Gulf of Maine (GOM); and (3) Production rates of Calanus will be food limited on Georges Bank except during the peak of the spring bloom, whereas winter/spring period. These two species will therefore respond differently to seasonal changes in food levels on Georges Bank. We propose to investigate two major aspects of Calanus finmarchicus and Pseudocalanus spp population dynamics and production on Georges Bank, in relation to the above hypotheses: (1) The recruitment of Calanus and Pseudocalanus on Georges Bank during the winter/spring period, as inferred from pump samples to quantitatively sample nauplii and early copepodites during the broad scale surveys; and (2) The rates of growth and egg production of Calanus and Pseudocalanus on Georges Bank, in relation to small scale spatial and temporal variability in the food environment during the process cruises.