Population dynamics of Barbus grypus (Heckel, 1843) and Barbus barbulus (Heckel, 1847) in Karoon River, south-west Iran

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Abstract

Barbus sp. fish samples were collected during November 2007 to October 2008 from five
landing stations in Karoon River: Gotvand, Shoshtar, Molasani, Ahwaz, and Darkhoin.
During one year of study, more than 2000 specimens of B. grypus and B. barbulus were
measured, mean±SD length values for this species were 37.94±8.18 and 43.62±10.27,
respectively and maximum and minimum total length were 20-76cm and 20-94cm,
respectively. Mean±SD of weight values for this species were 873.2±1092.45 grams and
778.59±725.97 grams, respectively and maximum and minimum weight were 52-11170
grams and 52-4675 grams, respectively. Growth and mortality parameters were calculated for
B. grypus and B. barbulus as L∞: 86.64, 132.9 and K: 0.27, 0.17 and t0: -0.46, -0.66, M: 0.50,
0.33, F: 1.22, 1.04, Z: 1.72, 2.72, 'Ф: 3.31, 3.48, E: 0.71, 0.76, respectively. According to the
exploitation coefficient, B. grypus and B. barbulus stocks are overfished hence we suggest a
decrease in exploitation coefficient. Based on results and their comparison with the American
Fisheries Society (AFS) indices, these species are classified in moderate to high vulnerable
group fishes.
*Corresponding author

Keywords

Iranian Scientific Fisheries Journal
Volume 20, Issue 3
May and June 2011
Pages 155-166

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