شكل و عمر و نمو أسماك البني Barbus sharpeyi Gunther, 1874 في هور السويب، جنوب العراق

Abstract EN

Morphology, age and growth of Bunni, Barbus sharpeyi Gunther, 1874 in Swab marsh, south Iraq, was studied from December 2004 to November 2005.

A total of 864 B.

sharpeyi (100-53mm TL) were colected using gil nets of different mesh sizes and electrical fishing.

Twenty one morphometric and seven meristic characters for the species were described in the study.

The morphometric characters were calculated as numerical ratio to standard and head lengths.

The indices characters asociated with standard length ranged from 0.0043 of eye diameter to 1.2 of total length, and with head length ranged from 0.178 of eye diameter to 0.752 of head width.

The slopes of the regresion lines ranged from 0.023 of eye diameter to 1.142 of total length.

Fishes of 200-360mm length groups of B.

sharpeyi were dominants in the samples.

Total ength–weight relationship of B.

sharpeyi was W = 3.839 × 10-6 L 3.2017.

The mean relation condition factor was 1.001.

The annuli on scales formed during December and the growth of the scales was high during the period from February to August and was asociated with water temperatures.

The relation betwen standard length (L) and scale radius (S) was : L = 17.737 + 5.0469 S.

The age composition ranged from 1 to 7.

The standard lengths for these ages were 138.0, 202.0, 248.0, 304.8, 353.8, 393.1 and 439.2mm respectively.

The growth of B.

sharpeyi in Swab marsh was beter than that of at Iraqi waters with the exception of B.

sharpeyi at Hammar marsh.

The mathematical model of growth as calculated by von Bertalanfy equation was Lt = 650 [1-e-0.138 (t + 0.642)].