نتایج جستجو برای: valuable fishery resources
تعداد نتایج: 376737 فیلتر نتایج به سال:
With the promotion of reform in various fields and release vitality fishery development, Chinese has achieved sustained rapid development. Today, China become one largest fishing countries, with abundant offshore pelagic routes, a large number vessels. The result is more pollutants emitted by vessels, which seriously affects air quality surrounding environment. In this paper, survey resources E...
The Common Fisheries Policy was introduced as a 20-year program in 1982 to promote conservation and management of the European Community fishery resources. Since its inception, however, there has been increasing concern over the lack of integration of environmental issues into the policies underpinning the CFP, despite several treaty obligations, and several inadequacies highlighted in the mid-...
The blue crab, Callinectes sapidus, is a valuable resource in the Coastal Bays, supporting a steady commercial and recreational fishery. Surveys suggest that blue crab abundance fluctuates without an apparent trend, yet there is still a successful annual commercial fishery that even attracts crabbers from the Chesapeake Bay. Since 1990, commercial landings for crabs have averaged from 0.5 to 1....
Norway lobster (Nephrops norvegicus) is one of the most valuable shellfish resources in Mediterranean and northeast Atlantic. Sustainable management its fishery require long-term scientific monitoring stocks. Population dynamics, fishery, exploitation status were studied over a long time series (between 2008 2014) semi enclosed gulf Easter (Pagasitikos Gulf). Sampling was carried out using comm...
in this paper, the large amount of sedimentation and the resultant shoreline advancements at the breakwaters of beris fishery port are studied. a series of numerical modeling of waves, sediment transport, and shoreline changes were conducted to predict the complicated equilibrium shoreline. the outputs show that the nearshore directions of wave components are not perpendicular to the coast whic...
Although many studies have focused on marine resources, few studies have considered the resources of inland fisheries. Inland fishery resources are typically either monitored on the basis of catch data alone or are not assessed quantitatively at all, despite their social, economic, and ecological importance. Because freshwater ecosystems have been severely degraded by human activities, evaluati...
The Galapagos Islands are a prime example of a place where fishery management policies have been established without first understanding the behavior of fishermen. Since the creation of the Galapagos Marine Reserve in 1998, there has not been a single study in the archipelago that investigates fishing behavior and the factors affecting this behavior. This paper addresses this gap in the literat...
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