KARAKTER MORFOMETRIK PENSI (Corbicula moltkiana Prime) PADA DUA EKOSISTEM YANG BERBEDA

Abstract

Lake Maninjau and Batang Antokan is a place that used as recreation and tourism spots in Agam District. Both human activities around the lake or on river affect the water quality, both in physics and chemistry, and biology, and greatly affect the lives of shellfish. Given the high activity of catching “Pensi“ Corbicula moltkiana on Lake Maninjau, it is necessary to attempt to preserve shellfish populations and to seek ways of cultivation so that utilization can be continuously and can improve the community economy. This study aims to determine the morphometric characters Pensi (Corbicula moltkiana Prime) in two different ecosystems and Physical-chemical factors that influence it. This study had been done in February 2015 at Lake Maninjau and in Sungai Batang Antokan. Based on research at Lake Maninjau and in Sungai Batang Antokan size of shell such as length, height, width, length hinge, the amount of lines and heavy wet growth in Batang Antokan pensi meat more variable when compared to Lake Maninjau. However, the size of the shell length performs in Batang Antokan different with in Lake Maninjau while the size of the width and weight of wet meat Pensi is no different in the two habitats. The relationship between the length of the wet weight of the meat at Lake Maninjau and in Batang Antokan correlate very closely with their clam shell length. Chemical physics factors of water in Lake Maninjau and in Batang Antokan still within the normal range and tolerant in Pensi (Corbicula moltkiana Prime) life support except levels of organic substrate.