| Growth, mortality, production and biomass were evaluated in a Chilean population of the sand crab Emerita analoga. From May 1973 to June 1974, it was attempted to representatively sample on a monthly basis, the densities and size frequency distributions in the population ; proportion of soft individuals and proportion of females in berry in each size class were also assessed. Mean size and relative importance of each component age group in each sample were estimated by graphic analysis on probability paper. Age classes 0-IV represented most of the captures ; the males reached about 17 mm carapace length at end of age IV, while the females reached about 25 mm at end of age III. A linear growth equation was fitted by regression of the mean sizes on age, for... |
