SOME MORPHOMETRIC RELATIONSHIPS OF SANDBIRD OCTOPUS, AMPHIOCTOPUS AEGINA (GRAY, 1849) (CEPHALOPODA: OCTOPODIDAE) FROM THE SUEZ GULF, RED SEA
Ayman, S., Mohamed, F., Magdy, T., Azza, A. (2020). SOME MORPHOMETRIC RELATIONSHIPS OF SANDBIRD OCTOPUS, AMPHIOCTOPUS AEGINA (GRAY, 1849) (CEPHALOPODA: OCTOPODIDAE) FROM THE SUEZ GULF, RED SEA. EKB Journal Management System, 49(9), 105-126. doi: 10.21608/jes.2020.206294
S. A. Ahmed Ayman; F. Osman Mohamed; T. Khalil Magdy; A. El-Ganainy Azza. "SOME MORPHOMETRIC RELATIONSHIPS OF SANDBIRD OCTOPUS, AMPHIOCTOPUS AEGINA (GRAY, 1849) (CEPHALOPODA: OCTOPODIDAE) FROM THE SUEZ GULF, RED SEA". EKB Journal Management System, 49, 9, 2020, 105-126. doi: 10.21608/jes.2020.206294
Ayman, S., Mohamed, F., Magdy, T., Azza, A. (2020). 'SOME MORPHOMETRIC RELATIONSHIPS OF SANDBIRD OCTOPUS, AMPHIOCTOPUS AEGINA (GRAY, 1849) (CEPHALOPODA: OCTOPODIDAE) FROM THE SUEZ GULF, RED SEA', EKB Journal Management System, 49(9), pp. 105-126. doi: 10.21608/jes.2020.206294
Ayman, S., Mohamed, F., Magdy, T., Azza, A. SOME MORPHOMETRIC RELATIONSHIPS OF SANDBIRD OCTOPUS, AMPHIOCTOPUS AEGINA (GRAY, 1849) (CEPHALOPODA: OCTOPODIDAE) FROM THE SUEZ GULF, RED SEA. EKB Journal Management System, 2020; 49(9): 105-126. doi: 10.21608/jes.2020.206294

SOME MORPHOMETRIC RELATIONSHIPS OF SANDBIRD OCTOPUS, AMPHIOCTOPUS AEGINA (GRAY, 1849) (CEPHALOPODA: OCTOPODIDAE) FROM THE SUEZ GULF, RED SEA

Journal of Environmental Science
Article 2, Volume 49, Issue 9, September 2020, Page 105-126  XML PDF (813.87 K)
Document Type: Review Article
DOI: 10.21608/jes.2020.206294
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Authors
S. A. Ahmed Ayman1; F. Osman Mohamed2; T. Khalil Magdy3; A. El-Ganainy Azza1
1National Institute of Oceanography and Fisheries
2Faculty of Agriculture , Ain Shams University.
3Faculty of Science, Ain Shams University
Abstract
Octopus is an important resource for the fisheries sector and has commercial value. For this reason, maintenance and conservation is requisite to preserve and keeping its survival. So, some morphometric relationships of Amphioctopus aegina was studied at the Gulf of Suez – Northern Red Sea. The results showed that the length-weight relationship of dorsal mantle length (DML) with total weight (TW) of A. aegina is negative allometric and obtained by the formula Y= 0.5198X2.6696 with the correlation coefficient of r2= 0.8998 for males and Y= 0.8065X2.4042 with the correlation coefficient of r2=0.9319 for females. The results indicated that 90% or more of weight gain occurs due to the old growth of the octopus body, while 10% or less of weight gain is affected by other factors such as environmental conditions and age factors. The length-length relationships of DML with the different body measurements of A. aegina showed a negative allometric (b<1). While, the relations of DML with long arm length (LAL), total length (TL) and short arm length (SAL) were positive allometric growth (b>1) for males and females and the correlation coefficient (r2) showed a good fitted data for all relationships.
 
Keywords
Keywords: Amphioctopus aegina; Morphometric measurements; length-weight relationship; length-length relationships; Suez Gulf
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