4329

4093

كارشناسي ارشد

شيلات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1387

دوازده، 92،[II] ص: مصور، جدول، نمودار

ص.ع. به: فارسي و انگليسي

يزدان كيواني

سالار درافشان

29/11/87

اميدوار فرهاديان، اصغر عبدلي

مهندسي منابع طبيعي

ID4093

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

Abstract The genus Cyprinion of the family Cyprinidae is distributed only in Asia There are ninespecies in this genus amongst which five are reported from Iran The species C kais C macrostomum and C tenuiradius were reported from Karkheh and Karun River basins Based onvarious reports their taxonomy is uncertain In this study 282 specimens of C macrostomum and24 specimens of C kais from Karkheh River basin Do Ab Gamasiab Saimare Kashkan Chardavol and Karkheh Rivers and Godarkhosh River in Ilam province were caught then fixed freezed or transported alive to Ichthyological Laboratory Department of Natural Resources Isfahan University of Technology To study the taxonomy of the specimens morphological osteological and karyological traits were used Parametric and non parametric methods forcomparison of means and Factor Analysis for separation of groups were used The last dorsal finspine in C kais was longer than in C macrostomum the SD average of dorsal fine height relativeto standard length were 0 19 0 02 and 0 18 0 01 respectively The posterior spinules of lastdorsal spine in C macrostomum were equal in size but different in C kais and its tip was softerand more flexible than in C macrostomum The mouth form in C kais was narrow and highlyarched but in C macrostomum it was wide and less arched the SD average of mouth radiusrelative to mouth width were 0 39 0 06 and 0 28 0 04 respectively The joint between the twodentaries in C kais were weaker than in C macrostomum and the maxillary and premaxillary in C kais were more arched than in C macrostomum The diploid number in both taxa was 2n 50 inC kais included eight metacentric 10 submetacentrics and seven acro and telocentric chromosomepairs and FN 86 and in C macrostomum included four metacentric 13 submetacentric and eighttelocentric chromosome pairs and FN 84 There were no significant differences between thebiometrical characteristics in the two taxa in other characters p 0 05 Based on the observeddifferences in chromosomal formulae mouth characteristics and the last dorsal fin spine the twotaxa C kais and C macrostomum are distinguished at least as subspecies Although the two taxacould also be distinguishable at species level they are not completely separated as good species possibly due to their recent speciation Keywords Cyprinidae Cypriniformes Iran Karyology Morphology Osteology Taxonomy Tigris Euphrates

يزدان كيواني

سالار درافشان

اميدوار فرهاديان، اصغر عبدلي