کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8875248 | 1623607 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stock assessment of the lizardfish Saurida tumbil (Bloch, 1795) in Jizan fisheries, Saudi Arabia
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم کشاورزی و بیولوژیک (عمومی)
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چکیده انگلیسی
To evaluate the current stock status of the lizardfish Saurida tumbil in Jizan fisheries, growth parameters, mortality coefficients and size at first capture were determined. Otoliths collected from 623 specimens were used for age determination and back calculations of lengths at ages. The growth parameters of von Bertalanffy were estimated and found to be Lâ = 52.98 cm, K = 0.27 yrâ1, and to = -0.84 yr. The mortality coefficients were estimated to be 1.365, 0.403 and 0.962 yrâ1 for the total 'Z', natural 'M', and fishing 'F' mortality coefficient, respectively. The current exploitation rate 'Ecur' was 0.705 yrâ1. The length at first capture 'Lc' was determined to be 25.1 cm. The relative yield and biomass per recruit were estimated, and the results showed that the exploitation rate is currently higher than Emax = 0.685 yrâ1 and E0.1 = 0.551 yrâ1 as biological reference points, which indicates that the stock of Saurida tumbil in Jizan fisheries is currently overexploited.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Egyptian Journal of Aquatic Research - Volume 43, Issue 2, June 2017, Pages 147-153
Journal: The Egyptian Journal of Aquatic Research - Volume 43, Issue 2, June 2017, Pages 147-153
نویسندگان
Mohamed Hosny Gabr, Ahmad Osman Mal,