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Analisis of oyster morphometry from two different locations
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| Author:
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RIYANTO , JAMILAH NASUTION
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| Abstract:
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Oyster is salt-water bivalve molluscs that live in marine or brackish habitats. Morphometry is the quantitative
analysis of size and shape. This observation was conducted during August 2017 to September 2017 at
Belawan, Medan (Site 1) and Tanjung Pura, Langkat (Site 2) . Total samples were 146 oyster or 73 oyster per
location. The oysters were collected by hand picking. The oyster samples were observed at Biology
Laboratory, Universitas Medan Area, North Sumatra, Indonesia. The objectives of this observation were (i) to
determine how close correlation berween edible meat weight (MW) with shell length (SL=X1), shell high
(SH=X2), shell wide(SD=X3), and shell weight (SW=X4), of oyster (Anadara antiquata) from two different sites,
(ii) if the correlation r>0.5 it will be determined their multiple linier regression models, (iii) to determined
whether or not the two multiple linier models were identik. Both locations were still in North Sumatra
province of Indonesia. The distance of the two sites were around 100 km. Both sites were selected due to
they were considered as central of oyster productions. The condition of both locations were relatively similar,
such as climate and the salt water. The results of these observations were (i) correlation berween edible meat
weight (MW ) with SL, SH, SD and SW at Belawan was r = 0.17 and at Tanjung Pura was r = 0.76 , (ii) sice
the correlation r > 0.5 so, it was made the multiple regression model, and the results were Y = 0.01 X1 + 1.14
X2 + 0.45 X3 - 0.01 X4 + 4.61 at Belawan and at Tanjung Pura, it was Y = 0.96 X1 -0.56 X2 + 0.61 X3 +
0.41 X4 - 3.33. The dependent variables Y was the oyster meat weght (MW) and the independent variables
were : X1 = shell length (SL), X2 = shell high (SH), X3 = shell wide (SD), and X4 = shell weight (SW). (iii) by
using t-test if was defined that the two multiple linier models were identik.
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| Keyword:
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Oyster (Anadara antiquata ), Morfometry, Belawan, Tanjung Pura, correlation, regression
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| EOI:
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| DOI:
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