Morphological variation in Leaping mullet populations, Chelon saliens (Risso, 1810) in the southern part of the Caspian Sea basin using geometric morphometric method

Document Type : Research Paper

Authors

1 Assistant Professor, Inland Waters Aquaculture Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research, Education and Extension Organization, Bandar Anzali, Iran

2 Associate Professor, Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran

3 Associate Professor, Inland Waters Aquaculture Research Center. Iranian Fisheries Sciences Research Institute. Agricultural Research, Education and Extension Organization, Bandar Anzali, Iran

4 Ph.D. Student,, Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran

10.22059/jfisheries.2023.91487

Abstract

It is important to study and investigate exotic species to protect their stocks. This study was carried out to investigate the morphological change in Chelon saliens populations from southern basin of the Caspian Sea. For this purpose, during 2020-2021, by beach seine nets, 238 specimens were collected from seven costs including Astara (35 samples), Talash (45 samples), Bandar Anzali (50 samples), Kiashahr (33 samples), Langaroud (15 samples), Chaboksar (40 samples) and Sari (13 samples). After imaging the lateral view of the samples, some 14 landmark-points were defined and digitized on the two-dimensional images. The body shape data after generalized procraust analysis were exposed to statistical analysis including principal component analysis (PCA), canonical variate analysis (CVA) and cluster analysis (CA). Also, the deformation patterns of each population related to consensus shape of the populations in the deformation grids were illustrated. The results showed that there is a significant difference among the studied populations in terms of morphology. The highest Mahalanobis and Procraust distances were obtained in Langaroud and Sari, respectively. The main morphological differences were related to the position of the mouth, head size, body depth and caudal peduncle length, indicating the high morphological flexibility of this exotive species in adaptation with different habitats of the Caspian Sea basin.

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References

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Journal of Fisheries
Volume 76, Issue 1
March 2023
Pages 1-10

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