S. Ahmed, A., A. El-Ganainy, A., F. Osman, M., T. Khalil, M. (2021). Observations on some morphometric characters of the webfoot octopus, Amphioctopus membranaceus (Quoy and Gaimard, 1832) from the Suez Gulf, Red Sea, Egypt. test, 25(2), 103-115. doi: 10.21608/ejabf.2021.158705
Ayman S. Ahmed; Azza A. El-Ganainy; Mohamed F. Osman; Magdy T. Khalil. "Observations on some morphometric characters of the webfoot octopus, Amphioctopus membranaceus (Quoy and Gaimard, 1832) from the Suez Gulf, Red Sea, Egypt". test, 25, 2, 2021, 103-115. doi: 10.21608/ejabf.2021.158705
S. Ahmed, A., A. El-Ganainy, A., F. Osman, M., T. Khalil, M. (2021). 'Observations on some morphometric characters of the webfoot octopus, Amphioctopus membranaceus (Quoy and Gaimard, 1832) from the Suez Gulf, Red Sea, Egypt', test, 25(2), pp. 103-115. doi: 10.21608/ejabf.2021.158705
S. Ahmed, A., A. El-Ganainy, A., F. Osman, M., T. Khalil, M. Observations on some morphometric characters of the webfoot octopus, Amphioctopus membranaceus (Quoy and Gaimard, 1832) from the Suez Gulf, Red Sea, Egypt. test, 2021; 25(2): 103-115. 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

Egyptian Journal of Aquatic Biology and Fisheries
Article 8, Volume 25, Issue 2, March and April 2021, Pages 103-115    PDF (676.93 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2021.158705
Authors
Ayman S. Ahmed; Azza A. El-Ganainy; Mohamed F. Osman; Magdy T. Khalil
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= 0.7391x2.4222 with the correlation coefficient of r2= 0.843 for males, and y= 0.85x2.3348 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.
Keywords
Amphioctopus membranaceus; morphometric characters; length-weight relationship; Suez Gulf
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