Segara Anakan, located next to the South of Java Island, is one of the estuary regions in Indonesia. Geographically, Segara Anakan is at 7^o37'–7^o45'S and 108^o47'–109^o03'E. It has unique characteristics because it is blocked by Nusakambangan Island, and holds two seawater entrances, from Pelawangan Barat and Pelawangan Timur. This region is an area of rich natural resources, one of which is Tiger Shrimp (P. monodon). The shrimp has high economic value for the surrounding community. The research was a survey with sampling cluster techniques along the waters of Segara Anakan Cilacap. Sampling was obtained from seven stations for three months with a one-month interval. The Tiger Shrimp diet observed from their intestines included Chrysophyta (Melosira sp., Achanthes sp., Navicula sp., Chaetoceros brefis, Synedra sp., and Coscinosdiscus sp.), Chlorophyta (Closterium sp.), Cyanophyta (Lyngbya sp., Oscillatoria sp.), and Euglenophyta (Phacus sp.). Food sources available in Segara Anakan for the shrimp were Nitzschia sp., Navicula sp., Chaetoceros sp., Synedra sp., and Melosira malayensis. Crustaceans (8889 individuals), fish (312 individuals), and gastropods (41 individuals) were also observed in Segara Anakan. The preference index of Tiger Shrimp was Chlorococcum sp. (1.71), Pleurosigma sp. (1.44), Cymbella sp. (1.43), Achanthes sp. (1.38), Synedra sp. (1.31), Chaetoceros brevis (1.11), and Calanus sp. (1.02).

Diah Etika Maharatih Setiarina

Romanus Edy Prabowo

Moh. Husein Sastranegara