IIARD International Institute of Academic Research and Development

International Journal of Agriculture and Earth Science (IJAES )

E- ISSN 2489-0081
P- ISSN 2695-1894
VOL. 10 NO. 5 2024
DOI: 10.56201/ijaes.v10.no5.2024.pg314.317

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Length-Weight Relationship of the Red Mangrove Root Crab (Goniopsis cruentata) fromIsi-Okwaan Estuary, Oyorokoto Rivers State, Nigeria

CHUKWU. K. O. and AMADI, J

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Abstract

A growth study on the ecologically important Red Mangrove Root Crab (Goniopsis cruentata) from Isi-Okwaan Estuary, Oyorokoto Rivers State,revealed that the crab had a negatively allometric growth which was recorded as follows; Male 2.344±0.192, Female 2.007±0.154, and combined sex 2.026±0.127. Regression analysis of the width –weight relationship showed that the males had a value of 2.24±0.179, females 1.71±0.145 and combined sex value was 1.84±0.126. The condition factor values for July was 2.373, August 2.112, and September 2.776 with a mean value of 2.42 for both sex. The monthly condition factor showed a steady increase from July to September for the males, while the best condition for females was recorded in September and the least in August. The sex ratio for the species was 1:1.7 (Male: Female), while a test for departure from 1:1 ratio using Chi square test indicated that there was a significant difference in the sex ratio. The Red Mangrove Root Crab (Goniopsis cruentata) was female dominated and in good condition in Isi-Okwaan Estuary.

keywords:

Crab, Crustacean, Growth, Condition, Sex Ratio

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