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Iranian Journal of Fisheries Sciences، جلد ۲۰، شماره ۲، صفحات ۴۶۳-۴۷۴
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عنوان انگلیسی Research Article: The decline in the size of ribbonfish, Trichiurus lepturus (Linnaeus 1758), over the past decade in the Persian Gulf
چکیده انگلیسی مقاله Size-dependent variation in growth, mortality, and recruitment over time are potentially controlled by changes in length -frequency distribution that is dependent to capture probability. The changes in the length-frequency distribution of ribbonfish, Trichiurus lepturus were studied along northern coasts of the Persian Gulf during the period 2008-2017. The length-frequency distribution of ribbonfish indicated the exploitation of larger sizes over the past decade. The mean total length was significantly smaller than the mean length recorded a decade earlier in 2008 (p< 0.05). The length-weight relationship (WT=0.00004LT3.44) was found to be significant at 1% level of significance and indicated positive allometric growth.  The Von Bertalanffy growth parameters of all fish were =119.35 cm, K=0.3 year-1, and t0 = -0.38 year. Total, natural, and fishing mortality were estimated as 1.16 year-1, 0.53 year-1, and 0.63 year-1. The annual instantaneous rate of fishing mortality was higher than the target (Fopt= 0.26 year−1) and limit (Flim=0.35 year−1) reference points, indicating that the ribbonfish stock is at the risk of unsustainable exploitation.
کلیدواژه‌های انگلیسی مقاله Trichiurus lepturus, Size decline, Population dynamics, Persian Gulf
نویسندگان مقاله | F. Khadem Khervi
Department of Marine Biology, Faculty of Marine Science, Tarbiat Modares University, 46414-356, Noor, Iran.


| M. Ghodrarti Shojaei
Department of Marine Biology, Faculty of Marine Science, Tarbiat Modares University, 46414-356, Noor, Iran.


| S.A. Taghavimotlagh
Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension, Organization, Tehran, Iran
نشانی اینترنتی http://jifro.ir/browse.php?a_code=A-10-3412-2&slc_lang=en&sid=1
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Stock assessment
نوع مقاله منتشر شده پژوهشی
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