Pola Distribusi Dan Kepadatan Kijing Air Tawar (Pilsbryoconcha Exilis) Di Per…

ABSTRACT Indragiri River has high biological resources as necton, gastropods, plankton and the others. There are activities antropogenic can affect the distribution of Pilsbryochonca exillis. P. exillis has good ecological and economic potential. This study aimedto determine the distribution and density of P. exillis in the Indragiri river, Lubuk Terentang village, Kuantan Singingi Regency,…