Scientia Agriculturae The Effects of Different Diets on Ovary Maturation and Spawning of Pond-reared White Indian Shrimp (Fenneropenaeusindicus)

Current investigation is conducted to determineeffect of four different diets on ovary maturation and spawning of the pond-rearedWhite IndianShrimps for a time span of 60 days. One group of shrimps (control group) was fed with concentrate food of broodstocks. The second, third, and forth groups were fed by squid meat, Solen vagina meat, and Polychaete worms from Nereididae family, collected along the intertidal zone in BandarAbbas, respectively. For each experimental group, three iterations were considered. Results of experiments indicate that the maximum amount of growth and maturation of ovary and spawning was for the fourth group (fed by Polychaete worms); the mentioned group had a significant difference with other groups (P<0.05). The second and the third groups (fed by squid and solen vagina) showed lower significant difference. The first group did not have a significant difference. Based on results and data, it can be concluded that three major factors of environmental conditions, endocrine hormones, and the diet type are important factors that have an impact on maturation of ovary and spawning of reared White IndianShrimps. Introduction White IndianShrimp (Fenneropenaeusindicus) is a species that have the highest amount of application among penaeidae family in aquiculture industry of Hormozgan Province. According to development of shrimp reproduction and breeding industry in south of the country, demands for post larvae are increasing year after year and providing broodstocks with high quality is major problem for producing high quality ovule and sperm. Most of shrimp hatcheriesare dependent to wild reserves of shrimp, which have variable quality and supply. On the other hand, providing wild broodstocks has attracted most of the shrimp reproduction workshops, due to its low price. However, providing broodstocks by this method is only possible in a seasonal and limited manner. In addition, providing broodstocks by wild hunting causes many costs of a reproduction workshop, due to variation price of broodstock in each year. If the broodstocks can be reared in ponds, this would avoid hunting of wild reserves and reduces costs of egg production; broodstock is provided to the reproduction section with the same quality during the season, and since there are various diseases in this industry, if all the sanitary concerns on broodstocks maintenance are considered, diseases would not be transferred to reproduction and breeding section. Stimulating sexual maturation and spawning in closed conditions is dependent to maintenance conditions. If the maintained shrimps are fed well with the live food, they would have better conditions. In current study, it was tried to feed the reared shrimps with 4 types of diet and the ovary maturation and spawning amount of these groups were compared