Phylogeny of Oxudercines (Gobiidae: Oxudercinae) with emphasis on the position of Walton’s mudskipper (Periophthalmus waltoni Koumans, 1941) and inter population study of this mudskipper using geometricmorphometrics
- سال انتشار: 1393
- محل انتشار: دومین کنفرانس ماهی شناسی ایران
- کد COI اختصاصی: ICII02_208
- زبان مقاله: انگلیسی
- تعداد مشاهده: 306
نویسندگان
Department of Biology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
Research Ichthyology lab., Department of Biology, College of Sciences, Shiraz University, Shiraz
Department of Biology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
چکیده
The family Gobiidae with more than 1700 known species, includes five subfamilies and isconsidered to be one of the largest families of Pisces. This taxa is a cosmopolitan one; hence, thephylogenetic relationships among subfamilies of gobiids have been noteworthy. Amplification andsequencing of mtCytb of 13 specimens of walton’s mudskipper, Periophthalmus waltoni, made itpossible to determine the phylogenetic position of this species in relation to other species andgenera of the subfamily Oxudercinae, for the first time. Evaluation of Maximum likelihood treeand genetic distances has been proved that P. waltoni is closely related to Periophthalmus barbaruswhich is distributed in western coasts of Africa. It seems P. waltoni and P. barbarus are relictfauna of Tethys Sea. Based on morphological studies, the subfamily of Oxudercinae is composedof two tribes namely, Periophthalmini and Oxudercini; Amblyopinae is the closest sister taxon ofOxudercinae. Molecular dataset from Cytb and D-loop do not recognize two tribes withinoxudercines, moreover; it has been proved that Amblyopinae is nested within Oxudercinae andnone of them are monophyletic. It is notable that in several cases, the genetic distance between thetwo genera of two different tribes is lower than the genetic distance between two genera belongingto the same tribe. In our study, outgroup was selected from Amblyopinae, but genetic distancesshowed that Amblyopinae is nested within Oxudercinae and these two subfamilies are not sistertaxa. More molecular studies on species of Oxudercinae and Amblyopinae will clarify taxonomicposition of these two subfamilies and maybe result in their integration. P. waltoni was collectedfrom four stations, including Gowater (n=41), Jask (n=35), Hele (n=46), and Mahshahr (n=37).Specimens from different stations were compared by Geometric Morphometric method (17landmarks), using TPS series, MorphoJ, PAST and SPSS. Employing Geometric morphometrics,more than 90% of P. waltoni from different populations are classified correctly, however; nosignificant difference was found between sexes (P> 0.05). It is noteworthy that Gowater and Jaskare located in Gulf of Oman and two other stations are located in the Persian Gulf, therefore; themorphological differences between different populations are likely to be significantly correlatedwith salinity and temperature readings of stations. In the very near future, molecular studies basedon Cytb and D-loop genes will determine whether the morphological differences have genetic basisor physicochemical variables of the Persian Gulf and Gulf of Oman are responsible for thesedifferences.کلیدواژه ها
Periophthalmus waltoni, Cytb, Geometric Morphometrics, Persian Gulf, Gulf of Omanاطلاعات بیشتر در مورد COI
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