منابع مشابه
A simplified model for bottom trawl fishing gears
Computational modeling is a valuable complementary tool to assess behavior of bottom trawl fishing gears. A simplified model of the gear that mainly affects to the net is proposed. The model is constrained to steady towing conditions, flat seabed and gear symmetry. Simulations proportionate a number of relevant outcomes like distribution of tensions at the warp, balance of forces at the otterbo...
متن کاملPlate motions, Gondwana dinosaurs, Noah's arks, beached Viking funeral ships, ghost ships, and landspans.
Gondwana landmasses have served as large-scale biogeographic Noah's Arks and Beached Viking Funeral Ships, as defined by McKenna. The latitudinal trajectories of selected Gondwana dinosaur localities were traced through time in order to evaluate their movement through climate zones relative to those in which they originally formed. The dispersal of fauna during the breakup of Gondwana may have ...
متن کاملFishing lantern trawl; Environmental, social and economic aspects of the Oman Sea
Lanternfish is one of the most important and aquatic reserves in the Oman Sea. After the cessation of the fish lantern fishing project provided by foreign vessels owned by Iranian companies by the Iranian Fisheries Organization, the impact of the activity of foreign vessels on aquatic resources should be considered for reasons other than those envisaged in the contracts and research plans. Ligh...
متن کاملspecies composition of bycatch trawl commercial trawler from fishing grounds in hormozgan province
this study was conducted for estimation of bycatch shrimp trawl from fishing grounds of hormozganprovince.sampling operation was carried by commercial trawler around hormoz and qeshm islandduring fishing season in october and november 2012. towing duration was between 1 to 3.5h(2±0.08h). contribution of bycatch and target species was 86.26% (18918.80 kg) and 13.74%(3014.22kg) respectively. by-c...
متن کاملComparing Trawl and Creel Fishing for Norway Lobster (Nephrops norvegicus): Biological and Economic Considerations
This study compares the fishing activity and landings of the trawl and creel fisheries for Norway lobster (Nephrops norvegicus (L.)) off the Portuguese coast, and evaluates the financial viability of two vessels typical of each fleet. Crustacean trawlers are part of an industrial fleet that, besides Nephrops, targets deep water shrimps. Creels are used by a multi-gear, multi-target artisanal fl...
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ژورنال
عنوان ژورنال: The Journal of Japan Institute of Navigation
سال: 1980
ISSN: 0388-7405,2187-3275
DOI: 10.9749/jin.63.117