Is the hybridization phenomenon traceable in the otolith and scale of extantAphaniusspecies? - A case study on hybrid offsprings ofAphanius farsicusXA. sophiae(Teleostei: Aphaniidae)

Masoudi, Mojtaba; Esmaeili, Hamid Reza; Teimori, Azad; Ebrahimi, Mehregan und Seifali, Mahvash (2020): Is the hybridization phenomenon traceable in the otolith and scale of extantAphaniusspecies? - A case study on hybrid offsprings ofAphanius farsicusXA. sophiae(Teleostei: Aphaniidae). In: Acta Zoologica, Bd. 102, Nr. 2: S. 182-191

Abstract

The otolith and scale were analysed in the hybrid offsprings between twoAphaniusspecies, that is,A. farsicusandA. sophiaeto evaluate if they are suitable to trace hybridization. An artificial reciprocal hybridization was performed between two species. The hybrids ofA. farsicus male xA. sophiae female had otoliths with long and pointed rostrum with a narrow depression in the middle of the ventral rim. The otoliths of hybrids betweenA. farsicus female xA. sophiae male were more close toA. sophiae male. As a result, the otolith contour of the hybrids was intermediate to those of the parents. Therefore, we suggest that some variations observed in the otoliths ofAphaniusspecies may be resulted by hybridization particularly when they are sympatric or has geographic overlap. Also, no remarkable differences were found between the scales of hybrids and parents. This indicated that scale morphology and surface microstructures are not suitable for tracing the hybridization. If these species are sympatric due to possible translocation, it causes the genetic introgression of a native species through hybridization. This must be particularly considered in the conservation programme of endangeredA. farsicusbecause artificial transplantation and consequent hybridization can lead to the extinction of this critically endangered species.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• ISSN: 0001-7272
• Sprache: Englisch