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DISTRIBUTION AND STATUS OF SPINED LOACH POPULATIONS (Actinopetrigii: Cobitidae) ALONG THE SOUTHERN CASPIAN SEA BASIN
Abouzar Habibi
; Department of Fisheries Sciences, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, P.O. Box: 1144, Guilan, Iran
Hamed Mousavi-Sabet
; Department of Fisheries Sciences, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, P.O. Box: 1144, Guilan, Iran
Majidreza Khoshkholgh
; Department of Fisheries Sciences, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, P.O. Box: 1144, Guilan, Iran
Hamid Reza Esmaeili
; Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
Sažetak
In order to clarify the distribution pattern of Cobitis populations along the southern Caspian Sea basin, 97 specimens collected from five localities were morphologically examined. Univariate analysis of variance showed significant differences (P<0.05) among the means of the five groups for 28 of 33 standardized morphometric measurements and 7 of 10 meristic counts. In the linear discriminant function analysis (DFA) for morphometric characteristics, the overall assignment of individuals into their original groups was high (84.9%), indicating that these populations are highly divergent. The proportion of individuals correctly classified into their original groups were 77.4%, 77.3%, 100%, 100% and 89.5% for Cobitis sp. (Gisum River), Cobitis keyvani (Sefidroud River), C. keyvani (Tonekabon River), Cobitis faridpaki (Siahroud River) and C. keyvani (Talar River), respectively. Clustering based on Euclidean distances among these groups of centroids using UPGMA and principal components analysis (PCA) indicated that the southeastern Caspian spined loach populations are C. faridpaki and the south central ones are C. keyvani and an unknown population, Cobitis sp. is distinguished from the southwestern populations of the basin. Also the Tonekabon and Sefidroud Rivers were determined to be the two new habitats for C. keyvani in the region.
Ključne riječi
Cobitis; morphometric differentiation; meristic; distribution pattern; Caspian Sea
Hrčak ID:
112697
URI
Datum izdavanja:
30.12.2013.
Posjeta: 1.330 *