Cytogenetic Analysis of Garra variabilis Heckel 1843 Pisces Cyprinidae from Savur Stream Mardin Turkey

In this study cytogenetic analysis were carried out on Garra variabilis (Heckel, 1843) individuals from Savur stream (Mardin). The karyIn this study cytogenetic analysis were carried out on Garra variabilis (Heckel, 1843) individuals from Savur stream (Mardin). The karyotype of G. variabilis was analyzed using G-banding, C-banding, Ag-NOR staining and Q-banding techniques. Diploid chromosomes number of specimens was determined as 2n=102. However, two karyotype formulae were identified in the G. variabdis specimens: female 42m+18sm+24st+18a (FN = 186) and males 41m+18sm+24t+19a (FN = 185). Nucleolar organizer regions (NORs) were identified by silver nitrate staining. NOR regions were observed on many chromosome pairs. The largest chromosome pair was defined as submetacentric. The detail karyotype of G. variabdis is reported for the first time.bdis is reported for the first time

Karyological Analysis and body proportion of Catfish Clariidae Clarias lazera Valeciennes 1840 in Göksu Delta Turkey

Chromosome analysis of Clarias lazera living in wet lands located in Göksu River (Göksu Delta) was accomplished by modified air-drying.Clarias lazera was found to have 18 metacentric, 26 submetacentric and 12 acrocentric chromosomes. Twentyfive systematically important meristic and morphometric characters of Clarias lazera in the Göksu Delta were examined for 49 specimens. In order to clarify the taxonomic status of Clarias lazera, which is not originally from this region, karyological analyses were carried out, and certain some morhometric characteristics were investigated