Egg production rates of copepods from seven SEPT-1999 WP-2 closing net catches

Sampling volume was estimated by the net mouth surface and the towing distance. Egg production rates of the dominant calanoid copepods were determined by incubation of fertilised females (eggs female-1 d-1) collected in the 0-100m layer. Copepod egg production was measured for the copepods Temora stylifera, Clausocalanus furcatus, Nannocalanus minor, Paracalanus parvus and Centropages typicus. On board experiments for the estimation of copepod egg production were taken place. For the estimation of copepod production (mgC m-2 d-1), lengths (copepods and eggs) were converted to body carbon (Hopcroft et al., 1998) and production was estimated from biomass and weight-specific egg production rates, by assuming that those rates are representative for juvenile specific growth rates (Berggreen et al., 1988). […]

采样体积通过网口面积与拖曳距离进行估算。优势哲水蚤目桡足类（calanoid copepods）的产卵率通过对采自0-100米水层的受精雌体进行培养测定，单位为卵·雌体⁻¹·日⁻¹。本研究针对Temora stylifera、Clausocalanus furcatus、Nannocalanus minor、Paracalanus parvus及Centropages typicus这5种桡足类开展了产卵量测定。本次研究实施了桡足类产卵量估算的船基实验。为估算桡足类生产量（单位：mgC·m⁻²·日⁻¹），先将桡足类及其卵的体长转换为体碳含量（Hopcroft等，1998），再基于生物量与体重特异性产卵率估算生产量，且假设该产卵率可代表幼体的特异性生长率（Berggreen等，1988）。[…]