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Khadem, Firuzeh, Ghodrarti Shojaei, Mehdi, Taghavi Motlagh, Seyyed Amin. (1399). The decline in the size of ribbonfish, Trichiurus lepturus (Linnaeus 1758), over the past decade in the Persian Gulf. سامانه مدیریت نشریات علمی, 20(2), 463-474. doi: 10.22092/ijfs.2021.123867
Firuzeh Khadem; Mehdi Ghodrarti Shojaei; Seyyed Amin Taghavi Motlagh. "The decline in the size of ribbonfish, Trichiurus lepturus (Linnaeus 1758), over the past decade in the Persian Gulf". سامانه مدیریت نشریات علمی, 20, 2, 1399, 463-474. doi: 10.22092/ijfs.2021.123867
Khadem, Firuzeh, Ghodrarti Shojaei, Mehdi, Taghavi Motlagh, Seyyed Amin. (1399). 'The decline in the size of ribbonfish, Trichiurus lepturus (Linnaeus 1758), over the past decade in the Persian Gulf', سامانه مدیریت نشریات علمی, 20(2), pp. 463-474. doi: 10.22092/ijfs.2021.123867
Khadem, Firuzeh, Ghodrarti Shojaei, Mehdi, Taghavi Motlagh, Seyyed Amin. The decline in the size of ribbonfish, Trichiurus lepturus (Linnaeus 1758), over the past decade in the Persian Gulf. سامانه مدیریت نشریات علمی, 1399; 20(2): 463-474. doi: 10.22092/ijfs.2021.123867

The decline in the size of ribbonfish, Trichiurus lepturus (Linnaeus 1758), over the past decade in the Persian Gulf

Iranian Journal of Fisheries Sciences
دوره 20، شماره 2، خرداد 2021، صفحه 463-474    اصل مقاله (1.1 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22092/ijfs.2021.123867
نویسندگان
Firuzeh Khadem1؛ Mehdi Ghodrarti Shojaei* 2؛ Seyyed Amin Taghavi Motlagh3
1Department of Marine Biology, Faculty of Marine Science, Tarbiat Modares University, 46414-356, Noor, Iran.
2Tarbiat Modares
3Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension, Organization, Tehran, Iran
چکیده
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.
کلیدواژه‌ها
Trichiurus lepturus؛ Size decline؛ Population dynamics؛ Persian Gulf
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تعداد مشاهده مقاله: 397
تعداد دریافت فایل اصل مقاله: 289


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