Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 17, Issue 2, 2015; Page No.(431-436)

LENGTH-WEIGHT RELATIONSHIP OF BLOOD COCKLE (ANADARA GRANOSA) AS WATER QUALITY INDICATOR AT LADA BAY SUNDA STRAIT

RATNA KOMALA, FREDINAN YULIANDA, DJAMAR TF LUMBAN BATU AND ISDRADJAD SETYOBUDIANDI

Abstract

Bivalve is the most dominant group of molluscs and widespread in various habitats. One of the bivalves that has economical and ecological role is blood cockle (Anadara granosa). The purpose of this research was to determine the length-weight relationship as one growth aspect of Anadara granosa and to determine the environmental parameters that influence that cockle growth. The research method was descriptive, while the sample was taken by using fishing gear garok drawn by motor boat used Swept area method. The results showed that A. granosa has class size of 13 intervals, with the highest frequency is in the size 13.04-16.04 mm, while the low frequency is in the size 37.12-40.12 and 40.13-43.13 mm. The pattern of length-weight relationship of cockle in all five zones was negative allometrik growth, (b value <3) in range b value 1.207-2.726 with the model equations for six months, is W= 0.003H1.678, while model equations based on sex of male and female namely W= 0.043H1.578; and W= 0.029L1.734. It shows that the length of the shell changes more quickly than the tissue weight of shells. The main environmental parameters affecting the growth of A. granosa are the velocity of water flow, Total Suspended Solid (TSS), NO2-, NH3, dissolved oxygen (DO), water temperature, depth and Total Organic Matter (TOM).

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