Nutritional Characteristics and Feeding of Rabbitfish ( Siganus guttatus ) in Tam Giang-Cau Hai Lagoon Systems

The research aimed to investigate for lagoon foodweb and dietary composition for rabbitfish in different stages (larvae, fingerlings and grower). Data were collected from two experiments using basic methods in field and laboratory. Experiments were structured on 2,000 larval head, 500 each tanks for nursery and 90 heads of three groups were collected in different seasons to laboratories for analysis of feeding intake and food compositions. Results showed that the number of omnivorous species, including animals, plants and organics, have been identified and grouped in 39 genera, 30 families, 23 sets, 8 classes and 6 branches. Animal groups have been identified as 18 breeds, 18 families, 13 lines, 3 classes and 3 animal species of industry animal. Plant foodweb, mainly Bacillariophyta, have accounted for 27 genera and 67.5% of total expenditure vegetation eaten by the rabbitfish. For the animal feed industry joint foot, Arthropoda have the highest number of 15 varieties, accounting for 83.3% of the animal’s nutritional ratio. Organic residues as food for species have the highest prevalence in digestive tract (94.4%). The dominant food groups were determined as 15 genera and 5 animal breeds, particularly those large groups of algae.