نتایج جستجو برای: fisheries

تعداد نتایج: 15801  

2008
GEORGE W. BOEHLERT

The fisheries of Hawaii and other u.S.-associated islands in the Pacific Ocean are characterized by high diversity, both in the species exploited and the human cultures that exploit them. The commercial sector has undergone rapid growth in recent years, but recreational and subsistence sectors remain important. Information on these fisheries is generally not available in published form. This pa...

2008
Bryan P. Wallace Selina S. Heppell Rebecca L. Lewison Shaleyla Kelez Larry B. Crowder

1. Fisheries bycatch has been implicated in declines of many long-lived marine vertebrate populations, but bycatch impacts on these populations vary according to spatio-temporal overlap in fisheries operations and critical ontogenetic habitat, as well as to characteristics of fishing gear. 2. To provide a framework for comparing the relative impacts of different fisheries on populations of logg...

Journal: :Science 2007
J R Beddington D J Agnew C W Clark

The public perception of fisheries is that they are in crisis and have been for some time. Numerous scientific and popular articles have pointed to the failures of fisheries management that have caused this crisis. These are widely accepted to be overcapacity in fishing fleets, a failure to take the ecosystem effects of fishing into account, and a failure to enforce unpalatable but necessary re...

2004
Richard Ogutu-Ohwayo John S. Balirwa

Many African countries are among the poorest in the world and as a result, the development objective of most African countries is to reduce or even eradicate poverty through modernising agricultural production including fisheries. In countries around Lake Victoria, fisheries contribute 3-5% of GDP. Fisheries also contribute significantly to export earnings of a number of African countries. On a...

2006
Ralf Doering

Two main problems can be identified in fisheries currently: overfishing and negative effects on ecosystems (including bycatch). Both result in a reduction in natural capital. In recent years a concept for a theory of sustainability was developed at our institute. Part of the work has been to develop a strategy in fisheries for creating sustainable use systems, which can be considered as "invest...

Journal: :Biology letters 2013
Mafalda Viana Luke McNally Norman Graham David G Reid Andrew L Jackson

Understanding the pressures of fisheries on the ecosystem is crucial for effective management. Fishery removals, or catch, are composed of both landings and discards. However, the use of discards data in studies investigating the effect of the fishing pressures is sparse. Here, we explore the individual contribution of both these catch components to the overall pressure of fisheries on the ecos...

2017

Reef fisheries provide a vital source of income and food to millions of people worldwide. Reef fishes are important to many countries in the Caribbean not only for their value to the fisheries, but also their value to the tourism industry, where they are an important part of the snorkeling and diving experience. Many Caribbean reef fisheries have been overexploited for decades and often their d...

2011
Michael C Melnychuk Timothy E Essington Trevor A Branch Selina S Heppell Olaf P Jensen Jason S Link Steven J D Martell Ana M Parma John G Pope Anthony D M Smith

School of Aquatic and Fishery Sciences, University of Washington, Box 355020, Seattle, WA 98195, USA; Dept. Fisheries and Wildlife, Oregon State University, 104 Nash Hall, Corvallis, OR 97331, USA; Institute of Marine & Coastal Sciences, Rutgers University, 71 Dudley Rd., New Brunswick, NJ 08901, USA; National Marine Fisheries Service, Northeast Fisheries Science Center, 166 Water Street, Woods...

2017
Margherita Pieraccini Emma Cardwell

In seeking to answer the question ‘who should be included in fisheries co-management?’, a constructive critique of the existing co-management literature is provided by filling the gaps of Habermas’s deliberative theory of democracy with Dewey’s pragmatism. Three conditions for ensuring democratic co-management are extrapolated from the theories: actors’ authority over decision making (empowerme...

2011
TABITHA CHENG YEE HUI Andrew W. Trites

.................................................................................................................................. ii PREFACE ..................................................................................................................................... iii TABLE OF CONTENTS ......................................................................................................

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