Growth pattern and reproductive biology of Acanthopagrus latus from the Persian Gulf

Abstract

The growth pattern and reproductive biology of Acanthopagrus latus were studied to derive information required for their management in the south part of Iran, Persian Gulf. Samples collected monthly from October 2014 to September 2015. Parameter values of the Von Bertalanffy growth function fit to length frequency data (males and females combined) were estimated as k = 0.23 per year, L∞ =50.4 cm (LF), t o = −0.7 years. Total, natural and fishing mortality (males and females combined) calculated as Z=0.87 per year, M=0.57 per year and F=0.3 per year, the exploitation rate were estimated for this species as E=0.45 per year. According to collected length data, A. latus exploited below the mean size at which females achieved first sexual maturity (24.4 cm LF). The length-weight relationships of males and females together estimated as, W=0.0939*LF 2.57 and exhibited negative allometric growth. Gonado-somatic index estimation indicated February as a spawning time for this species, with the main spawning period enduring to Jun. In general, parameters values obtained, characterized this species of relatively slow growing and long lived, which should be taken into consideration for sustainable management and exploitation for preventing overexploitation.

Population dynamics of Arabian yellowfin seabream, Acanthopagrus arabicus Iwatsuki, 2013 from Iraqi marine waters, Arabian Gulf

“…The values for 'b' less than 3.0 indicates that the fish become heavier for a particular length as it increases in size [36] . Similar growth coefficient values for the species were reported by Mathews and Samuel [13] in Kuwait waters, Arabian Gulf (b = 2.780), Riaz et al [32] in the Karachi coast, Pakistan (b = 2.733) and Vahabnezhad et al [15] in Iranian waters, Arabian Gulf (b = 2.570). The growth coefficient of fish differs not only in different species but also the same within species depending on sex, maturity stage, feeding intensity, health condition, season, stress and sampling methodology [35,37] .…”

“…In the present study, the asymptotic length (L∞) of A. arabicus was 44.6 cm, which was higher than those stated by Morgan [11] in Kuwait waters, Arabian Gulf (L∞ = 43.0 cm), Mathews and Samuel [13] in Kuwait waters, Arabian Gulf (L∞ = 44.5 cm) and Mustafa et al [16] in the Sundarbans Ecosystem, Bangladesh (L∞ = 33.6 cm), nevertheless, it was lower than those stated by Resen et al [14] in north-west Arabian Gulf (L∞ = 48.7 cm) and Vahabnezhad et al [15] in Iranian waters, Arabian Gulf (L∞ = 50.4 cm as fork length). By the way, Mustafa et al [16] stated that the Sundarbans ecosystem is the nursery ground for A. arabicus in Bangladesh.…”

“…The species constituted 1.7% of fish assemblage in Garmat Ali River [7] , 0.6% of fish assemblage in the East Hammar marsh [8] , 4.2% of fish assemblage in the Shatt Al-Arab River [9] and 2.2% of fish structure in the south part of Main Outfall Drain, Basrah, Iraq [10] . There are a few studies have been done on the population dynamics of A. arabicus in some waters using ELEFAN or FiSAT II software such as Morgan [11] Lee and Al-Baz [12] and Mathews and Samuel [13] in Kuwait waters, Arabian Gulf; Resen et al [14] in Iraqi waters, Arabian Gulf; Vahabnezhad et al [15] in Iranian waters, Arabian Gulf, and Mustafa et al [16] in the Sundarbans Ecosystem of Bangladesh. In this study, we explore the use of the FiSAT II software [17] to estimate growth parameters, mortality rates, probability of capture, recruitment pattern, yield per recruit and virtual population analysis of A. arabicus in Iraqi marine waters to provide management advice for their sustainable exploitation in the fishery.…”

Stock status and some biological aspects of Lethrinus lentjan (Lacapede, 1802) from the south coast of Kenya

“…Several fish species have been reported to exhibit prolonged spawning periods lasting for between 7-9 months in the Western Indian Ocean region (Qasim, 1973). This scenario has also been confirmed to occur in other sparid species such as Acanthopagrus latus in the Persian Gulf, where spawning took place from February to June (Vahabnezhad et al, 2017).…”

“…The Kenya by Aura et al (2013), and in Nigeria by Omogoriola et al (2011), while b varied slightly from the same sparid species studied in Kuwait (Vahabnezhad et al, 2017). Biological parameters in fishes, including length-weight relationships, are affected by factors such as prevailing environmental conditions, health condition, season, and population differences (Morey et al, 2003;Faroese, 2006).…”