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Amphibia

Karyological comparison of water frog (Rana cf. ridibunda) populations from Bahrain, eastern Saudi Arabia and Egypt

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Pages 41-49 | Published online: 28 Feb 2013
 

Abstract

Karyological analysis was carried out on three separate populations of the Water Frog Rana cf. ridibunda from Bahrain, Saudi Arabia, and Egypt. Chromosome preparations made from bone marrow cells showed that the three populations possess a karyotype of 26 chromosomes. Variation in the relative arm lengths of the chromosomes 3, 5 and 11 among the three populations was recorded. No cytological evidence of sex dimorphism was recorded in the three populations. The present study failed to recognise any secondary constriction in the karyotypes of the three populations. The karyological studies do not indicate that the three populations belong to different species.

Kurzfassung

Drei Wasserfrosch-Populationen (Rana cf. ridibunda) in Bahrain, Saudi-Arabien und Ägypten wurden in karyologischer Hinsicht verglichen. Chromosomenpräparate aus Knochenmarkzellen ergaben bei allen drei Populationen 26 Chromosomen. Variabilität der relativen Länge der Arme wurde bei den Chromosomen 3, 5 and 11 festgestellt. Es ergab sich kein Hinweis auf Sexualdimorphismus der Chromosomen. Eine sekundäre Einschnürung wurde in keiner der drei Populationen gefunden. Die karyologischen Ergebnisse geben keinen Hinweis darauf, daß die drei Populationen unterschiedlichen Arten zuzordnen Sind.

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