Length-weight relationships and condition factor of five marine fish species from Bushehr Province, Persian Gulf, Iran
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Length-weight relationships and condition factor of five marine fish species from Bushehr Province, Persian Gulf, Iran Mojtaba Pouladi 1 & Seyed Yousef Paighambari 1 & Russell Brian Millar 2 & Manoochehr Babanezhad 3 Received: 14 August 2019 / Revised: 18 February 2020 / # Springer Nature Switzerland AG 2020
Abstract Length-weight relationships (LWRs) and condition factor were estimated for five economical marine fish species collected monthly using a hand line (hook sizes: 3, 5, 7, 9, and 11) and gillnet (stretched mesh sizes: 13, 14 and 15 cm) in the artisanal vessels from the fishing grounds of Bushehr province located in the Persian Gulf, Iran during October 2018 to June 2019. The LWRs for the fish species were W = 0.0144L3.071 (R2 = 0.99) for S. persicus, W = 0.0329L2.962 (R2 = 0.985) for P. maculosus, W = 0.0275L2.873 (R2 = 0.976) for U. helvola, W = 0.0296L2.867 (R2 = 0.968) for C. chrysophrys and W = 0.0387L2.859 (R2 = 0.982) for P. orbicularis. The estimated range for a was between 0.0144 and 0.0389, and for b was between 2.859 and 3.071. Length and weight ranges for S. persicus (L = 16.2–36.3 cm, W = 84.8-838.5 g), P. maculosus (L = 12.2–48.3 cm, W = 63.7– 2648 g), U. helvola (L = 18.9–44.6 cm, W = 124.5-1558.8 g), C. chrysophrys (L = 11.4–67.5 cm, W = 28.5-4935.2 g), and P. orbicularis (L = 17.6–56.2 cm, W = 121.7-3352.4 g) are wider than reported in previous studies. Also, K values were 1.82 ± 0.12 for S. persicus, 2.35 ± 0.11 for P. maculosus, 1.87 ± 0.16 for U. helvola, 1.94 ± 0.23 for C. chrysophrys and 2.29 ± 0.31 for P. orbicularis. The information about LWRs of Scarus persicus and Uraspis helvola are reported for the first time in the Persian Gulf. The results obtained can be beneficial as basic information for fisheries management and improvement of the technical performance of biologists in future studies. Keywords Marine fish . Artisanal fishing . Fishing gears . Hook . Gillnet
Introduction The Persian Gulf is located between Iran and the Arabian Peninsula in the subtropical region which is disjointed from the Oman Sea by the Strait of Hormuz (Paighambari and Daliri 2012). Owing to environmental and habitat diversity, Persian Gulf harbors high species diversity, including fish, reptiles, mammals, and birds. More than 900 fish species have been recorded at its water, including 93 Cartilaginous fish species and 814 bony fish species (Owfi et al. 2016). However, the data on the basic life-history traits including * Mojtaba Pouladi [email protected]; [email protected] 1
Department of Fisheries, Faculty of Fisheries and Environment Sciences, Gorgan University of Agricultural Sciences and Natural Resources, PO Box 4918943464Golestan Gorgan, Iran
2
Department of Statistics, University of Auckland, Private Bag 92019, Auckland, New Zealand
3
Department of Statistics, College of Sciences, Golestan University, Gorgan, Golestan, Iran
LWR is not available for many species (Owfi et al. 2016; Saberi et al. 2017). Bushehr Province has more than 707 km of the sea border with the Persian Gul
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