KEPADATAN DAN POLA PERTUMBUHAN KERANG LOKAN (Geloina erosa, Solander 1786) DI EKOSISTEM MANGROVE BELAWAN

Abstract

Density and growth pattern mangrove clam Geloina erosa (Solander 1786) in
mangrove ecosystem Belawan, has been investigated in December 2013 - February
2014. G erosa samples taken from three observation stations and each station observa-
tions were made 3 replicates (months) sampling. The method used in determining the
sampling point is the "purposive sampling". G. erosa samples were collected directly
by capturing by hand at the lowest tide. Result of the analysis data was the highest
density of G. erosa at station 1 Nypah fruticants vegetation average of 3.207 individ-
uals/m 2 , the lowest Heterogeneous vegetation at station 2 average of 1.362 individuals/
m 2 . Allometric growth patterns show a pattern of negative (b <3).