Reproductive cycle and index of condition used for Melongena corona (Mollusca : Gastropoda)

Melongena corona bispinosa was studied in Yucatan, Mexico (21 degrees 16'N, 89 degrees 49'W) for a year. Males have reproductive peaks in February and December, and a post-copulation peak in June. Female peaks are in March an d May, plus oviposition peaks in April and January. Males and females diffe r in the mean gonadosom ic index (F=13.79, p<0.05) but not in the dry tissu e/shell weight (F=0.0902, p<0.05), dry tissue and total weight (F=0.2466, p <0.05) and dry tissue weight/internal shell volume (F=1.0565, p<0.05).