Diversity and Abundance of Fish in The Bone Canal

Abstract

This study aims to describe the species diversity and abundance of fish in the Gorontalo Bone Canal. This research was conducted in the Bone Canal, Bone Bolango district, Gorontalo province with a survey method. Fish identification was carried out at the Zoology Laboratory of the Biology Department, State University of Gorontalo. The sampling technique was random sampling using nets installed at four observation stations for 24 hours. Station I is the northern part of the canal (upstream), station II is in the middle of the canal, station III is in the southern part of the canal (downstream) and station IV is located at the mouth of the Bone canal. Measurements of the physical and chemical parameters of water were carried out at each station. The fish caught were identified by referring to the book: “Identification of Freshwater Fish in Western Indonesia and Sulawesi” by: Kottelat at al, (1993). Research results and conclusions: 185 individual fish were found consisting of 3 orders, 5 families and 7 species, including: Cyprinus carpio and Barbonimus goionotus (Cypriniformes: Cyprinidae), Hypostamus sp. (Siluriformes: Loriicaridae), Oreocrhomis mosambicus and Oreochromis niloticus (Perciformes: Cichlidae), Oxyeleotris marmorata (Perciformes: Eleotrididae), and Anabas testudineus (Perciformes:Anabantidae). The highest diversity index is at station IV with H’= 1.96 and the lowest is at station I with H’= 1.50. This shows that the level of diversity of fish species in the Bone canal is moderate, the productivity is sufficient, the ecosystem condition is quite balanced and the ecological pressure is moderate. Hypostamus sp. has the highest level of abundance in all stations with an average of K = 30.9%. The lowest abundance was Cyprinus carpio with an average of all stations K= 3.3%, indicating that the abundance in Bone canal was relatively moderate.