پیوندهای مفید
آمار
| تعداد نشریات | 31 |
| تعداد شماره‌ها | 802 |
| تعداد مقالات | 7,694 |
| تعداد مشاهده مقاله | 35,288,059 |
| تعداد دریافت فایل اصل مقاله | 7,807,891 |
Stock status and future perspectives for pikeperch, Sander lucioperca in Aras Dam Reservoir, Northwest Iran | ||
| Caspian Journal of Environmental Sciences | ||
| مقالات آماده انتشار، اصلاح شده برای چاپ، انتشار آنلاین از تاریخ 19 مرداد 1404 اصل مقاله (699.26 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22124/cjes.2025.8958 | ||
| نویسندگان | ||
| Ali Haghi Vayghan* 1؛ Mehrnaz Ghanbarzadeh2 | ||
| 1Department of Ecology and Aquatic Stocks Management, Artemia and Aquaculture Research Institute, Urmia University, P.O. Box: 57179-44514, Urmia, Iran | ||
| 2Department of Natural Resources and Environmental Engineering, School of Agriculture, Shiraz University, P.O. Box: 71441-65186, Shiraz, Fars, Iran | ||
| چکیده | ||
| Pikeperch, Sander lucioperca is a commercially valuable species with a high market acceptance. Its stocks are declining due to environmental disturbances, pollution, and especially overfishing. One of the main feeders of the Caspian Sea is the Aras River, and the Aras Dam reservoir is one of the main inland fisheries sources in Northwest Iran. The most recent catch maximum sustainable yield (CMSY++) model was applied to estimate fisheries reference points of pikeperch in Aras Dam reservoir using catch data from October 2013 to March 2022 for applying fast management strategies, in addition to biometric data during the fishing season in 2023 for calculating the length-weight relationship. The values of both B/BMSY and F/FMSY were estimated to be smaller than 1.0. The MSY was estimated as 20.3. In 2013 and 2014, the amount of catch was more than the MSY, and the species has been under fishing pressure. Due to the high fishing pressure, the amount of catch has always been lower than the MSY in the following years. In this situation, the biomass is less than the BMSY, which has created a critical condition for pikeperch stock in the Aras Dam reservoir. In general, the continuation of this trend and the failure to adjust the exploitation of this stock will lead to stock reduction and depletion. Therefore, the estimations obtained from the modeling of this study recommend that the policy makers and fisheries managers to adjust illegal fishing and pay attention to the annual harvest limit for pikeperch stock, as well as protection of the nursery grounds for sustainable fisheries in the Aras Dam reservoir. | ||
|
آمار تعداد مشاهده مقاله: 3 تعداد دریافت فایل اصل مقاله: 1 |
||