Author: Alaska Sea Grant College Program Publisher: Alaska Sea Grant College Program ISBN: Category : Technology & Engineering Languages : en Pages : 344
Book Description
Bycatch, the capture of unmarketable or restricted species during commercial fishing, is a world economic, environmental, and political problem. This proceedings book features international research on bycatch reduction methods and gear devices, presented at a 1995 workshop in Seattle, Selected by the Journal of Government Information as an outstanding publication.
Author: Sean Pascoe Publisher: Food & Agriculture Org. ISBN: 9789251040430 Category : Bycatches (Fisheries) Languages : en Pages : 156
Book Description
The increase in commercial fisheries production over the last 50 years has been accompanied by an increase in the level of incidental catch and discarding of a number of species. Approximately one quarter of the marine commercial catch destined for human consumption is discarded at sea. This has raised the concern of a number of groups in society, including environmentalists, humanitarians and fishers themselves. In this paper, the economic incentives to discard fish are examined. The effects of different managemenet policies on these incentives are also investigated. The concept of an optimal level of discarding is discussed taking into account the externalities that can be created by discarding. Finally, the effectiveness of various measures to reduce the level of discarding is reviewed. these including technical, administrative and economic measures.
Author: Dayton L. Alverson Publisher: Food & Agriculture Org. ISBN: 9789251035559 Category : Technology & Engineering Languages : en Pages : 266
Book Description
The authors estimate that between 17.9 and 39.5 million tons (average 27.0 million) of fish are discarded each year in commercial fisheries. These estimates are based on a review of over 800 papers. The highest quantities of discards are from the Northwest Pacific while tropical shrimp trawl fisheries generate a higher proportion of discards than any other fishery type, accounting for one third of the global total. Of four major gear groups, shrimp trawls stand alone at the top of the list; bottom trawls, long-lines and pot fisheries come next. The third group consists of Japanese high-seas drift net fisheries, Danish seines and purse seines for capelin. Relatively low levels result from pelagic trawls, small pelagic purse seines and some of high seas drift nets. The authors point to inadequate data to determine the biological, ecological, economic and cultural impacts of discards although economic losses run to billions of dollars. However, it appears most likely that socio-cultural attitudes towards marine resources will guide international discard policies. Techniques to reduce bycatch levels including traditional net selectivity, fishing gear development and time/area restrictions, are discussed. Effort reduction, incentive programmes and individual transferable quotas (that make the vessel responsible for bycatch reduction) are seen as promising avenues for the future. However, quick solutions to the problem are unlikely and much more information is required. The publication includes a diskette with the complete Bycatch Database, which was compiled for the study, and a summary of it.
Author: Gustavo Lovrich Publisher: Oxford University Press ISBN: 0190865636 Category : Science Languages : en Pages : 512
Book Description
This is the ninth volume of ten in the The Natural History of the Crustacea Series. The chapters in this volume synthesize the diverse topics in fisheries and aquaculture. In the first part of the book, chapters explore worldwide crustacean fisheries. This section comes to a conclusion with two chapters on harvested crustaceans that are usually not within the focus of the mainstream fisheries research, possibly because they are caught by local fishing communities in small-scale operations and sold locally as subsistence activity. In the second part of the book, the authors explore the variety of cultured crustacean species, like shrimps, prawns, lobsters, and crabs. Chapters in the third part of the volume focus on important challenges and opportunities, including diseases and parasitism, the use of crustacean as bioindicators, and their role in biotechnology.
Author: Paul G. Harris Publisher: Routledge ISBN: 1135090513 Category : Political Science Languages : en Pages : 561
Book Description
This handbook provides a comprehensive and authoritative survey of Global Environmental Politics. It brings together leading international academic experts and features 40 chapters that: Describe the history of global environmental politics as a discipline and explain the various theories and perspectives used by scholars and students to understand it. Examine the key actors and institutions in global environmental politics, explaining the role of states, international organizations, regimes, international law, foreign policy institutions, domestic politics, corporations and transnational actors. Address the ideas and themes shaping the practice and study of global environmental politics, including sustainability, consumption, expertise, uncertainty, security, diplomacy, North-South relations, globalisation, justice, ethics, participation and citizenship. Assess the key issues and policies within global environmental politics, including energy, climate change, ozone depletion, air pollution, acid rain, sustainable transport, persistent organic pollutants, hazardous wastes, water, rivers, wetlands, oceans, fisheries, marine mammals, biodiversity, migratory species, natural heritage, forests, desertification, food and agriculture. With an in-depth new preface by the Editor, this edition of the handbook is an invaluable resource for students, scholars, researchers and practitioners of environmental politics, environmental studies, environmental science, geography, international relations and political science.
Author: Petri Suuronen Publisher: Food & Agriculture Org. ISBN: 9789251053232 Category : Business & Economics Languages : en Pages : 88
Book Description
Progress has been made in reducing bycatch and discards through improving the selectivity of fishing gear. This publication examines the key factors affecting the stress, injury and mortality of fish arising from fishing processes, particularly when fish escape from trawl equipment. It seeks to identify improved methodological approaches and practices, and to consider the design of fishing gears and operations that reduce or eliminate such deaths, and to assess the problems associated with estimating the impact of unaccounted fish mortality.
Author: Alaska Sea Grant College Program
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Author: Sean Pascoe
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Author: Dayton L. Alverson
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Author: SOLVING BYCATCH WORKSHOP.
Author: Gustavo Lovrich
Author: Paul G. Harris
Author: Petri Suuronen