PRELIMINARY STUDY OF EEL FISH IN LAKE POSO, SULAWESI ISLAND, INDONESIA

概要

論文の詳細を見る
Lake Poso in the Island Sulawesi, contains eel fish (Anguilla marmorata) that has a catadromic migration pattern. The 364 km2 lake is connected to the sea by a single river that drain the water from an elevation of 512 m down to the sea along a 40 km stretch. Conservation of the eel is endangered by the active catching by local people using bamboo traps along the river mouth from Lake Poso during migration to the sea as well as by environmental change of the Poso River estuary that exhibit landward migration of the elver. These are the reasons for which this research was conducted. Reproduction aspects of the eels during the period of May to August spawning migration cycle was studied by investigating the gonads and liver. Preliminary results show that some of the eels gonad are immature containing cysts of gonias while other have early vitellogenic oocytes. Liver of the eels rich with glycogen shows active metabolism during vitellogenesis. Gonadosomatic index (GSI) values range between 0.33 to 3.83% and Hepatosomatic Index (HSI) from 0.29 to 1.35%.
信州大学理学部の論文
2000-03-15