A Preliminary Evaluation Of The Status Of Shark Species
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A Preliminary Evaluation Of The Status Of Shark Species
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Author : José Ignacio Castro
language : en
Publisher: Food & Agriculture Org.
Release Date : 1999
A Preliminary Evaluation Of The Status Of Shark Species written by José Ignacio Castro and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Fishes categories.
The status of shark species is reviewed based on the available data. A review of the history of shark fisheries demonstrates that intensive shark fisheries are not sustainable. Numerous problems are encountered in assessing shark populations: a general lack of biological and fishery data, lack of suitable models, and lack of validated age estimates. Sharks have an unusual combination of biological characteristics: slow growth and delayed maturation, long reproductive cycles, low fecundity and long life spans. These characteristics make them vulnerable to overfishing. A preliminary evaluation of the status of shark species is made on the basis of historical data, the reproductive potential of each species, and the level of exploitation of the species. In this document, exploited shark species are classified numerically according to their vulnerability. The majority of these species are listed as Category 1, indicating that there are not sufficient data to assess the species. Available data indicate that sharks are very vulnerable and are threatened by overexploitation in many parts of the world.
Amendment 1 To The Consolidated Atlantic Highly Migratory Species Fishery Management Plan Essential Fish Habitat
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Author :
language : en
Publisher:
Release Date : 2009
Amendment 1 To The Consolidated Atlantic Highly Migratory Species Fishery Management Plan Essential Fish Habitat written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
The State Of World Highly Migratory Straddling And Other High Seas Fishery Resources And Associated Species
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Author : Jean-Jacques Maguire
language : en
Publisher: Food & Agriculture Org.
Release Date : 2006
The State Of World Highly Migratory Straddling And Other High Seas Fishery Resources And Associated Species written by Jean-Jacques Maguire and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Business & Economics categories.
Fisheries for highly migratory species are important in all oceans and semi-enclosed seas, except for polar regions. Fisheries for straddling fish stocks are much more localised, primarily occurring in a few regions where continental shelves extend beyond the 200 miles Exclusive Economic Zone (EEZ), while most fisheries for other high seas fishery resources are deep-water fisheries. This publication examines issues relating to the stocks of these resources, including information on their state of exploitation. Findings include that about 30 percent of the stocks of highly migratory tuna and tuna-like species, more than half of highly migratory oceanic sharks and nearly two-thirds of the straddling stocks and the stocks of other high seas fishery resources are overexploited or depleted. Although the stocks concerned represent only a small fraction of the world fishery resources, they are key indicators of the state of an overwhelming part of the ocean ecosystem which appears to be more overexploited than EEZs.
Sharks Of The Open Ocean
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Author : Merry D. Camhi
language : en
Publisher: John Wiley & Sons
Release Date : 2009-01-21
Sharks Of The Open Ocean written by Merry D. Camhi and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-01-21 with Technology & Engineering categories.
This important and exciting title represents the first authoritative volume focussed on pelagic (open ocean) sharks as a group. Virtually every pelagic shark expert in the world has contributed to this landmark publication which includes the latest data and knowledge on pelagic shark biology, fisheries, management, and conservation. Pelagic sharks face unprecedented levels of exploitation in all the world's oceans through both direct fisheries and by-catch, and effective management for these species is contingent upon solid science and data, which this book brings together for the first time. All those involved in shark biology will need to have a copy of this book.
World Ocean Assessment
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Author : Alan Simcock
language : en
Publisher: Cambridge University Press
Release Date : 2017-04-17
World Ocean Assessment written by Alan Simcock and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-04-17 with Law categories.
This United Nations report examines the current state of knowledge of the world's oceans, for policymakers, and provides a reference for marine science courses.
Incidental Catch Of Vulnerable Species In Mediterranean And Black Sea Fisheries A Review
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Author : Carpentieri, P., Nastasi, A., Sessa, M., Srour, A. (eds.)
language : en
Publisher: Food & Agriculture Org.
Release Date : 2021-06-28
Incidental Catch Of Vulnerable Species In Mediterranean And Black Sea Fisheries A Review written by Carpentieri, P., Nastasi, A., Sessa, M., Srour, A. (eds.) and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-06-28 with Technology & Engineering categories.
Bycatch – a term widely used to refer to part of the catch unintentionally caught during a fishing operation, in addition to target species, and consisting of the discards and incidental catch of vulnerable species – is considered one of the most important threats to the profitability and sustainability of fisheries, as well as to the conservation of the marine environment and ecosystems. Understanding the bycatch issue and adopting effective measures in order to reduce bycatch rates are essential steps towards minimizing the impacts on vulnerable species and ensuring both a sustainable fisheries sector and healthy seas. In the Mediterranean and the Black Sea, the incidental catch of vulnerable species – namely seabirds, sea turtles, elasmobranchs, marine mammals and macrobenthic invertebrates – represents one of several challenges for the industrial, semi-industrial and small-scale fisheries that coexist in the region, as well as for the diverse and sensitive ecosystems impacted. Typically, data on this issue have been collected in an opportunistic manner and in ways that make comparisons difficult. The annual absolute values of incidental catch of vulnerable species are not available: studies cover only a small portion of the total fishing activity and often present important knowledge gaps for many types of fishing gear, countries and/or subregions, as well as on temporal scales, for example, to establish reliable baselines. The result is that little is known of the scope of the problem, despite incidental catch being a significant pressure on the populations of vulnerable species, as well as a concern for fishers.This regional review is an attempt to compile, in one single document, all available data and historical records on the incidental catch of vulnerable species in the Mediterranean and Black Sea fisheries, obtained from existing literature, databases and other grey sources, and collated in a standardized and comparable way. The main objective is to provide comprehensive baseline information, earmark the main data gaps, as well as identify the most impacting types of fishing gear by taxonomic group. This work is a reminder of the importance of standardized data collection and the need to have baseline information in order to support decision-making in the identification of appropriate bycatch mitigation techniques, thus enabling analysis of their effectiveness and comparison over time and space, as well as facilitating the implementation of relevant conservation and/or management measures at the national, subregional and regional levels.
Consolidated Atlantic Highly Migratory Species Fishery Management Plan
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Author :
language : en
Publisher:
Release Date : 2006
Consolidated Atlantic Highly Migratory Species Fishery Management Plan written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Advances In Fisheries Science
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Author : Andrew I. L. Payne
language : en
Publisher: John Wiley & Sons
Release Date : 2009-01-22
Advances In Fisheries Science written by Andrew I. L. Payne and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-01-22 with Technology & Engineering categories.
This timely book brings readers up to date on the wide range of advances made in fisheries science since the publication in 1957 of On the Dynamics of Exploited Fish Populations (Beverton and Holt), regarded by many fisheries scientists as one of the most important books on fisheries yet published. Traditional fishery subjects covered include historic declines and changes in fishing fleets, fisheries management and stock assessments, data-poor situations, simulation and modelling of fished stocks, fisheries economics, assessing reproductive potential and dispersal of larvae, fisheries for sharks and rays, and use of marine technology. Additionally, related subjects of increasing importance now that ecological approaches to management are coming to the fore are presented. They include benthic ecology, ecosystem changes linked to fishing, life history theory, the effects of chemicals on fish reproduction, and use of sounds in the sea by marine life. Several chapters offer stimulating philosophical discussion of the many controversial areas still existing. This significant book, edited by Andy Payne, John Cotter and Ted Potter and containing contributions by world-renowned fisheries scientists, including many based at Cefas (where Beverton and Holt's original work was carried out) is an essential purchase for fisheries managers and scientists, fish biologists, marine scientists and ecologists. Libraries in all universities and research establishments where fisheries and biological sciences are studied and taught are likely to need copies of this landmark publication.
Electronic Tagging And Tracking In Marine Fisheries
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Author : John R. Sibert
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Electronic Tagging And Tracking In Marine Fisheries written by John R. Sibert and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Business & Economics categories.
Reviews: Methods and Technology in Fish Biology and Fisheries published by Kluwer Academic Publishers is a book series dedicated to the publication of information on advanced, forward-looking methodologies, technologies, or perspectives in fish and is especially dedicated to relevant topics addressing global, fisheries. This series international concern in fish and fisheries. Humans continue to challenge our environments with new technologies and technological applications. The dynamic creativity of our own species often tends to place the greatest burden on our supporting ecosystems. This is especially true for aquatic networks of creeks, lakes, rivers and ocean environments. We also frequently use our conceptual powers to balance conflicting requirements and demands on nature and continue to develop new approaches and tools to provide sustainable resources as well as conserve what we hold most dear on local and global scales. This book series will provide a window into the developing dynamic among humans, aquatic ecosystems (both freshwater and marine), and the organisms that inhabit aquatic environments. There are many reasons to doubt the increasing social and economic value technology has gained over the last two centuries. Science and technology represent stages in human development. I agree with Ernst Mayer when he said in Toward a New Philosophy of Biology (1988) that "endeavors to solve all scientific problems by pure logic and refined measurements are unproductive, if not totally irrelevant.
Marine Conservation Knowledge Experience And Tools For Change
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Author : Shaili Johri
language : en
Publisher: Frontiers Media SA
Release Date : 2022-03-08
Marine Conservation Knowledge Experience And Tools For Change written by Shaili Johri and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-08 with Science categories.