A Study on the Contribution of Different Food Sources to Shrimp Growth in an Intensive Fenneropenaeus chinensis Pond

Stable isotope methods can be used to determine the food sources and prey items of aquatic organisms accurately andreliably.This study examined the relative contribution of artificial foods (the formulated feed and Artemia) and natural foods toshrimp growth in an intensive Fenneropenaeus chinensis pond by using carbon and nitrogen stable isotopes.The results showed that the nutrition utilization efficiency of the harvested shrimp was low,only 33.18% of feed nitrogen and 21.73% of feed carbon beingconverted to shrimp flesh.Our stable isotope results showed that the shrimp obtained nutrition for maximum growth from artificialfoods,whose contribution was 93.5%,with the remaining attributed to the natural foods.However,there was 0.94 t harvested shrimpderived from natural foods (the rest of 13.56t harvested shrimp derived from artificial foods) in lha intensive pond with a shrimpproduction of 14.50 tha-1.Therefore,unit area shrimp production can be increased by increasing the contribution proportion of natu-ral foods in intensive shrimp farming.