Kebiasaan Makan Ikan Garing (Tor Tambra) di Sungai Batang Gadis Kabupaten Mandailing Natal Sumatera Utara

Abstract

Food is an important component of the water is an important factor for the growth and development of fish. This study aims to determine the food habits of Garing fish (Tor tambra), the availability of natural forage Garing fish (Tor tambra), and the efforts of the management of Garing fish resources (Tor tambra) in river Batang Gadis river. This study was conducted in July-August 2014 Batang Gadis river, Mandailing Natal Regency, North Sumatra. Fishing gear used nets ¾ and 1 inch. Analysis of data using plankton abundance calculation, plankton diversity index and the index of preponderance (IP).The results showed the contents of the digestive tract of Garing fish (Tor tambra) consists of 12 genus Bacillariophyceae, 10 genus Chlorophyceae, 2 genus Conjugatophyceae, 2 genus Coscinodiscophyceae, 5 genus Cyanophyceae, 1 genus Euglenophyceae, 1 genus Mesotaeniaceae, 1 genus Oligochaeta, 1 genus Plecoptera, 1 genus Rhizopoda , insects and leaf litter. Chlorophyceae was the main food, insect is a food supplement and Bacillariophyceae, Conjugatophyceae, Coscinodiscophyceae, Cyanophyceae, Euglenophyceae, Mesotaeniaceae, Oligocaheta, Rhizopoda and leaf litter is the extra food.Garing fish include fish types tend omnivores to herbivores and classified euryphagus. Recommended management of fish resources in Batang Gadis river done in two ways, namely water quality management to ensure the availability of natural food and management to maintain sustainability of Garing fish with domestication efforts.