SCALING OF FECUNDITY, GROWTH AND DEVELOPMENT IN MARINE PLANKTONIC COPEPODS

We compiled information from the literature on female and egg sizes an d maximum egg production, growth and developmental rates in marine pla nktonic copepods. While specific growth and developmental rates are in variant with body mass, weight-specific fecundity scales with female b ody mass(-0.26) in both broadcast-spawning and egg-carrying copepods. Egg sizes increase with female size and, consequently, egg production rates (no. of eggs female(-1) d(-1)) are constant with size. Developme ntal rates were similar among egg-carrying and broadcast-spawning cope pods, but the latter grow faster by 30 to 50% and have weight-specific fecundities that are 2.5 times and egg production rates that are 7.5 times those of the former, Nauplii develop faster (by a factor of 2) b ut grow slower (by 20 to 40%) than copepodites in both spawning types. The main demographic implications of these findings are (1) that mort ality is independent of body mass per se, (2) that sec spawners suffer higher overall mortality rates than broadcast spawners and (3) naupli i suffer higher mortality than copepodids.