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).