Abstract:
The purpose of this study was to obtain an overview of the biological aspects of food and obtain the data base on some parameters of the gastrointestinal tract of golden puffer fish (Tetraodon fluviatilis) from estuary waters of Bengkalis, Riau. Organisms which were found from the stomach of golden puffer fish were identified using Sachlan (1974) and Kottelat et al. (1993). The ratio of stomach weight /body weight, intestinal length/total body length, the ratio of intestinal length /total body length, the ratio of intestinal weight/body weight were statistically processed with linear regression (Annuddin, 2005). The result indicated that within the stomach of golden puffer fish were found natural foods that its a piece of fish, shrimp, and debris. Phytoplankton which found from stomach were the Bacillariophyceae, Chlorophyceae, Euglenophyceae, Phyrophyceae. Furthermore, the zooplankton which found were Nematoda, Rotifera, Ostracoda, Cladocera, Copepoda, Dapnia. Intestinal on male golden puffer fish was 0.5 to 1 times of its total body length and female fish is from 0.6 to 1 times of its total body length. The ratio of stomach weight, intestine length, the ratio of intestinal length and the ratio of ISI (intestinal Somatic Index) has a positive correlation with total body length of golden puffer fish. Golden puffer fish male and female was considered as a carnivorous fish based on the type of food and the length of gut.
