Observations on some morphometric characters of the webfoot octopus, Amphioctopus membranaceus (Quoy and Gaimard, 1832) from the Suez Gulf, Red Sea, Egypt

S. Ahmed, Ayman; A. El-Ganainy, Azza; F. Osman, Mohamed; T. Khalil, Magdy

doi:10.21608/ejabf.2021.158705

Observations on some morphometric characters of the webfoot octopus, Amphioctopus membranaceus (Quoy and Gaimard, 1832) from the Suez Gulf, Red Sea, Egypt

Document Type : Original Article

Authors

10.21608/ejabf.2021.158705

Abstract

Some morphometric characters of webfoot octopus, Amphioctopus membranaceus were subjected to study in the Suez Gulf in the Northern Red Sea. The present results showed that the length-weight relationship of mantle length (ML) and total weight (TW) of A. membranaceus is negative allometric. Findings were obtained using the equation of y= 0.7391x^2.4222 with the correlation coefficient of r²= 0.843 for males, and y= 0.85x^2.3348 with the correlation coefficient of r²= 0.9031 for females. The length-length relationships of ML and the different body measurements of A. membranaceus reported a negative allometric (b<1) relation. While, the relations of ML and total length (TL), long arm length (LAL), and short arm length (SAL) recorded positive allometric growth (b>1) for both males and females. Remarkedly, the correlation coefficient (r²) showed a good fitted data for all relationships.

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