Morphometric variations and genetic analysis of Lessepsian migrant Octopus aegina (Cephalopoda:Octopodidae)

Osman, Inas H.; Gabr, Howaida R.; El-Etreby, Salah G.; Mohammed, Saad

doi:10.4197/mar.25-2.2

Cited by 6 publications

(5 citation statements)

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“…The b values mostly were less than 1 in length-length relationships and totally less than 3 in length-weight relationships (all morphometric relationships of A. aegina showed a negative allometric except that of DML with LAL, TL and SAL were positive allometric growth for males and females). These results are more or less similar with (Osman et al, 2014), who studied the length weight relationship of Octopus aegina in the Suez Canal, Gulf of Suez and Mediterranean Sea. In the Suez Canal, octopuses grow isometrically as b values are equal to 3 for males, females and combined sexes.…”

Section: Dorsal Mantle Length -Head Length Relationshipsupporting

confidence: 90%

“…A number of morphometric studies have been carried out in other parts of the world on various octopus species, showing that both species and sexes can be separated on a morphological basis (Norman & Hochberg, 2005). Few studies have been done on the morphometric characters of Octopoda in the Egyptian waters (Riad & Gabr, 2007;Riad, 2008;El-Ganainy & Riad, 2008;Osman et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Some Morphometric Relationships of Sandbird Octopus, Amphioctopus Aegina (Gray, 1849) (Cephalopoda: Octopodidae) From the Suez Gulf, Red Sea

Ayman

Mohamed

Magdy

et al. 2020

Journal of Environmental Science

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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= 0.5198X 2.6696 with the correlation coefficient of r 2 = 0.8998 for males and Y= 0.8065X 2.4042 with the correlation coefficient of r 2 =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 (r 2 ) showed a good fitted data for all relationships.

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Section: Dorsal Mantle Length -Head Length Relationshipsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Some Morphometric Relationships of Sandbird Octopus, Amphioctopus Aegina (Gray, 1849) (Cephalopoda: Octopodidae) From the Suez Gulf, Red Sea

Ayman

Mohamed

Magdy

et al. 2020

Journal of Environmental Science

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“…Unfortunately,up to date, no population genetic study has been investigated for this specie in China and throughout the world. There is only limited information concerning the basic biology and ecology of this species (Ignatius et al, 2011;Promboon et al, 2011;Osman et al, 2015) that would provide clues for their population genetic structure. For example, matured females of A. Aegina reproduce small eggs and planktonic hatchlings (Villanueva and Norman, 2008;Promboon et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial COI sequences revealed shallow but significant divergences among Amphioctopus aegina (Octopoda, Octopodidae) populations in coastal waters of China

Sun

Yan

Hou

et al. 2022

Israeli Journal of Aquaculture - Bamidgeh

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Amphioctopus aegina is an important fishery resource in the coastal waters of China. In the present study, the genetic diversity and population genetic structure among four populations of A. aegina throughout its distributional range in China were assessed using the mitochondrial cytochrome oxidase 1 (COI) sequences. The results revealed a generally low genetic diversity (Hd: 0.2842–0.6670; Pi: 0.0007–0.0015) in A. aegina populations. The neighbor-joining (NJ) phylogenetic tree and the haplotype networks, as well as the results of the molecular variance (AMOVA) analyses, indicated a shallow phylogeographic structure among the four populations. However, pairwise ΦST statistics and genetic distance analyses revealed significant (p<0.01) genetic differentiation among Qinzhou and the rest three populations of Zhanjiang, Huizhou, and Dongshan. The demographic history analyses indicated a population expansion in A. aegina, and the role of Leizhou peninsula isolation in shaping the population differentiation. These results would largely enhance our understanding of the genetic structure and hence promote the scientific management of A. aegina fishery resources in coastal waters of China.

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“…Unfortunately, until now, there is no population genetic study that has been investigated concerning this specie in China and throughout the world. There is only limited information concerning the basic biology and ecology of this species (Ignatius et al, 2011;Promboon et al, 2011;Osman et al, 2015) that would help in predicting its population genetic structure. For example, matured females of A. Aegina reproduce small eggs and planktonic hatchlings (Villanueva and Norman, 2008;Promboon et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial COI sequences revealed shallow but significant divergences among Amphioctopus aegina (Octopoda, Octopodidae) populations in coastal waters of China

Sun

Hou

Zhao

et al. 2022

Preprint

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Background Amphioctopus aegina is an important fishery resource distributed in the coastal waters of China. However, the genetic variation and population genetic structure of it have never been investigated, to date. Methods In the present study, the genetic diversity and population genetic structure among the four A. aegina populations across its full distributional range in China were assessed based on the mitochondrial cytochrome oxidase1 (COI) sequences. Results The results revealed a remarkably low genetic diversity (Hd: 0.2842–0.6670; pi: 0.0007–0.0015) in A. aegina populations. The neighbour-joining (NJ) phylogenetic tree and the haplotype networks constructed, as well as the results of molecular variance (AMOVA) analyses, indicated a shallow phylogeographic structure among the four populations. However, pairwise genetic differentiation coefficient (ΦST) statistics and genetic distance analyses revealed significant (p < 0.01) genetic differentiation among Qinzhou and the rest three populations of Zhanjiang, Huizhou, and Dongshan. The demographic history analyses indicated a population expansion in A. aegina, and the role of Leizhou peninsula isolation in shaping the population differentiation. Conclusion These results would largely enhance our understanding of the genetic structure and promote the scientific management of A. aegina fishery resources in coastal waters of China.

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Morphometric variations and genetic analysis of Lessepsian migrant Octopus aegina (Cephalopoda:Octopodidae)

Cited by 6 publications

References 0 publications

Some Morphometric Relationships of Sandbird Octopus, Amphioctopus Aegina (Gray, 1849) (Cephalopoda: Octopodidae) From the Suez Gulf, Red Sea

Some Morphometric Relationships of Sandbird Octopus, Amphioctopus Aegina (Gray, 1849) (Cephalopoda: Octopodidae) From the Suez Gulf, Red Sea

Mitochondrial COI sequences revealed shallow but significant divergences among Amphioctopus aegina (Octopoda, Octopodidae) populations in coastal waters of China

Mitochondrial COI sequences revealed shallow but significant divergences among Amphioctopus aegina (Octopoda, Octopodidae) populations in coastal waters of China

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