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aqua 17(4)_Schizothorax esocinus

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Volume 17, Issue 4 – 15 October 2011

Farooq A Ganai, A. R. Yousuf, N. K. Tripathi: First report on the karyological analysis of the Churru snow trout, Schizothorax esocinus (Teleostei: Cyprinidae), from the River Jhelum, Kashmir, pp. 193-198

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SINGLE PAPER

Volume 17, Issue 4 – 15 October 2011

Farooq A Ganai, A. R. Yousuf, N. K. Tripathi: First report on the karyological analysis of the Churru snow trout, Schizothorax esocinus (Teleostei: Cyprinidae), from the River Jhelum, Kashmir, pp. 193-198

Abstract

The karyotype and chromosomal characteristics of the Churru snow trout, Schizothorax esocinus (Heckel), from the Jhelum River, Kashmir, were investigated. The analysis of 80 metaphase plates revealed that the chromosome number of this fish was 2n = 98 and the fundamental arm number (FN) = 150. The diploid complement comprised 15 metacentric pairs, 11 submetacentric pairs, 5 subtelocentric pairs and 18 telocentric pairs (30 m + 22 Sm + 10St + 36t). Total length of the haploid complement equalled 228.8 µm with a range in the length of shortest and longest chromosome between 2.5-8.1 µm. The arm ratio and the centromeric index ranged between 1-? and 0-50 respectively. No heteromorphic sex chromosomes were found. The present study is the first to describe the chromosomal characteristics of Schizothorax esocinus from the Kashmir Valley.

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