Fecundity of adult shrimp captured from earthen ponds was observed. The fecundity of male shrimp was observed by checking the number of spermatozoa contained in a pair of spermatophores and a pair of vas deferens respectively for each male. There was significant difference of spermatozoa count either in spermatophores or vas deferens between the samples from Lin-Yen and Chi-Ku area. Fecundity of adult female shrimp was observed through unilateral eyestalk ablation, and female with lager size (body weight, 42 g) showed higher spawning rate and number of eggs.