The volume of fecal pellets produced by the calanoid copepods Temora turbinata and Eucalanus pileatus increases with increasing weight of the copepod. Pellets produced by nauplii of E. pileatus are eaten by adult females of the same species at about the same rates as phytoplankton which has a volume simil ar to that of the pellets (105 µm3). Pellet production rates of juveniles, being generally in the range of 80 to 120 pellets produced • copepod-1 • 24 h-1, change little with increasing body weight....