کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4542916 1626801 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The dynamic simulation of the pelagic longline deployment
ترجمه فارسی عنوان
شبیه سازی پویا از راه انداز خطوط دریایی پلاژیک
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی
It is important to understand the deployment of pelagic longline gear for reducing non-target species interactions, and increasing fishing efficiency. In the present study hook depth data, simultaneous settlement data, and three-dimensional (3D) ocean current data were collected aboard the fishing vessel “Huananyu 716” while operating near the Cook Islands (10°50'S-15°05'S, 156°14'W-168°01'W) from September 2012 to November 2012. Taking into account the hydrodynamic force of longline fishing gear floats, dynamic equations of pelagic longline gear deployment were built using the lumped mass method and solved by the Euler-Trapezoidal method. The space shape and tension distribution of the longline gear were analyzed, a model was derived, and then verified. Results indicate that: (1) there were no significant differences (P > 0.05) between the hook depth measured by Temperature Depth Recorders (TDRs) during settlement and the simulated hook depth, except for the first hook (P < 0.001); (2) during the settlement, the tension of the nodes of the main line increased greatly; and (3) the fluctuations of gear space shape, tensile, and hydrodynamic forces of the main line nodes were closely associated with current velocities of the water column where the gear was located. The stronger the current, the larger the fluctuation in spatial location of the fishing gear. These results suggest that the dynamic model of longline fishing gear developed in the present study could be used: (1) to calculate the tension of nodes and floats in a variety of ocean current conditions; (2) to present the dynamic process of the deployment and settlement of each node and the 3D shape of the longline in a variety of ocean currents
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 167, July 2015, Pages 280-292
نویسندگان
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