نتایج جستجو برای: pelagic fisheries
تعداد نتایج: 21046 فیلتر نتایج به سال:
Washington. Since then the graduate student symposium has been providing a unique venue for fisheries students to meet and discuss their work, and to foster communication links between graduate students in different west coast universities and departments. This report is an attempt to disseminate the information on current research and ideas been developed by students in the different universit...
S Pelagic deep longline was widely used in targeting tunas of high economic values with other fish species caught incidentally as bycatch. Identifying characteristics of vertical distribution of fish species that interact with longline can provide critical information needed for the development of effective measures to mitigate bycatch species and is essential for ecosystem conservation. Much w...
In recent years, the analysis of environmental DNA (eDNA) has significantly improved, allowing for high-resolution species identification and possible biomass quantification from water samples. Fisheries management typically requires monitoring catches, including precise information about bycatch quantities to make sound assessments exploitation rates. Bycatch assessment is particularly challen...
Following a brief historical review of the emergence of fisheries for forage fish that are primarily destined for reduction, and their competition with fisheries for human consumption, an account is given of landing trends in various parts of the world, and catch maps are provided for the 1970s and 2000s which allow spatial and temporal comparisons. A brief account is also given of the changing...
Seamounts represent ocean features whose potential for biological resources has been largel) o\erlooked. The recent discover) of abundant fish resources in the southern Emperor Seamounts region, however, has led lo fisheries development and exploitation. We have little understanding of basic biological and population characteristics such as recruitment patterns, age distribution, the stock-recr...
The poleward flowing East Australian Current (EAC) is characterised by its separation from the coast, 100–200 nautical miles north of Sydney, to form the eastward flowing Tasman Front and a southward flowing eddy field. The separation zone greatly influences coastal ecosystems for the relatively narrow continental shelf (only 15–50 km wide), particularly between 32–341S. In this region the cont...
—This paper examines technological and economic interrelationships in Hawaii’s troll and handline fisheries. A multiproduct dual revenue function was specified separately for the two fisheries to estimate own-price, cross-price, and effort elasticities of supply for selected species or groups of species. Various aspects of multiproduct cost structure were also analyzed with the information cont...
In the Dutch Caribbean EEZ, at least 27 elasmobranch species have been documented. Of these, nine are listed as “critically endangered” and eight as “near threatened” by the IUCN. Elasmobranchs are not a target fishery in the Dutch Caribbean, but do occur as bycatch in artisanal fisheries. Sharks are considered nuisance species by fishermen. Most sharks caught are not discarded, but consumed lo...
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