Population dynamics of largemouth bass (Scomberoides commersonnianus) in the northwestern Persian Gulf

Peyrovi, Maryam; Roomiani, Laleh; Maboudi, Hadideh

Volume 16, Issue 3 (Autumn 2024) 3 2024, 16(3): 1-15 | Back to browse issues page

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Peyrovi M, Roomiani L, Maboudi H. Population dynamics of largemouth bass (Scomberoides commersonnianus) in the northwestern Persian Gulf. 3 2024; 16 (3) :1-15
URL: http://jmb.ahvaz.iau.ir/article-1-1046-en.html

Population dynamics of largemouth bass (Scomberoides commersonnianus) in the northwestern Persian Gulf

Maryam Peyrovi

, Laleh Roomiani

, Hadideh Maboudi

Department of Fisheries, Ahv. C., Islamic Azad University, Ahvaz, Iran.

Abstract: (24 Views)

Largemouth bass (Scomberoides commersonnianus) is an important commercial species of the Carangidae family that has great nutritional value. The economic importance of this species has led to intense fishing pressure to exploit the stock more, so that the valuable stocks of this species have undergone frequent fluctuations during recent measures, which has been accompanied by a decrease in the catch of this species. In this study, monthly sampling was conducted from May 2020 to January 2020 from the commercial catch unloaded at fishing stations in Khuzestan province (Sajafi and Choebdeh unloading stations), and a total of 1070 largemouth bass samples were bioassayed. Based on this, the infinite length (∞L) and growth coefficient (K) were estimated to be 105.5 cm and 0.14 per year, respectively, and the growth performance index (Ǿ) was estimated to be 2.3. The total mortality (Z), natural (M), and fishing mortality (Fcur) coefficients were estimated to be 1.25, 0.209, and 1.04 per year, respectively, and the current exploitation coefficient (Ecur) was estimated to be 0.833. The biological reference intersection was estimated based on the YPR equation in terms of fishing mortality equal to (F0.1=0.204, Fmax=0.408, F0.5=0.163) and in terms of exploitation equal to (E0.1=0.494, Fmax=0.661, F0.5=0.439). Based on the estimates of (Fmax) and (Emax), the fishing pressure rate (F) and the exploitation coefficient (E) should be reduced by about 61% and more than 20%.

Keywords: Largemouth bass, population parameters, growth pattern, biological reference points, Persian Gulf

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Type of Study: Research | Subject: Fisheries
Received: 2024/03/6 | Accepted: 2024/05/17 | Published: 2024/05/17