Depredation by marine mammals in fishing gear
Depredation by marine mammals in fishing gear

Author: Gonzalvo, J.

Publisher: Food & Agriculture Org.

Published: 2023-06-06

Total Pages: 56

ISBN-13: 9251379033

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Marine mammal depredation refers to the phenomenon of marine mammals partially or completely removing catch from fishing gear. Its results, which can affect the survival of wild dolphin populations, as well as damage gear or target fish, disturb fishing activities and generate economic losses for fishers, are a growing cause for concern in several Mediterranean and Black Sea fisheries. Depredation events often leave dolphins injured or snared in fishing nets and fishers with damaged nets and lower catch values. As a result, these interactions can create conflicts between dolphins and fishers, undermining efforts to improve the sustainability of fisheries and the conservation of vulnerable species. This review offers an overview of historical and current trends of depredation by marine mammals in the region, including information on the contiguous Atlantic area west of Gibraltar. The publication aims to assess and synthesize depredation records and describe ongoing projects on depredation in order to improve knowledge on key aspects of depredation, such as the fishing practices associated with depredation events, the economic fallout caused by marine mammal–fisheries interactions and the species and populations most involved in depredation. In the Mediterranean and the Black Sea, coastal fisheries often come into contact with cetaceans, especially bottlenose dolphins (Tursiops truncatus), common dolphins (Delphinus delphis) and harbour porpoises (Phocoena phocoena relicta). These species feature most prominently in the depredation records assessed and are the main research focuses of ongoing monitoring projects in the region. However, Mediterranean monk seals (Monachus monachus) are also responsible for depredation, especially in the eastern Mediterranean, and are the subject of their own short chapter in this review.

Overview of mitigation measures to reduce the incidental catch of vulnerable species in fisheries
Overview of mitigation measures to reduce the incidental catch of vulnerable species in fisheries

Author: Sacchi, J.

Publisher: Food & Agriculture Org.

Published: 2021-06-23

Total Pages: 136

ISBN-13: 9251345392

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Potentially harmful contact between fisheries and marine vulnerable species represents a global conservation issue and efforts to mitigate the negative repercussions of these interactions belong in strategies for ensuring the sustainability of fisheries. This literature review offers a survey of mitigation measures and techniques that have been developed and tested around the world, aiming to address both the incidental catch of highly mobile species – specifically, cetaceans, seabirds, sharks and rays, and sea turtles – and depredation caused by dolphins. Based on research detailed in over 300 documents, including peer-reviewed publications, reports from international organizations and papers available on the internet, most of the mitigation techniques illustrated are still under development, with only a few already adopted through legislation. The selected mitigation measures are grouped by main types of fishing gear – gillnets and trammel nets, longlines and lines, trawls, purse seines, traps and pots – and further subdivided according to which of the four main groups of vulnerable species – cetaceans, seabirds, sharks and rays, or sea turtles – they are designed to protect. Preventive and curative approaches covering both technical measures (gear modifications, strategies, as well as acoustic, visual, magnetic and chemosensory deterrents) and management measures are described.

Encyclopedia of Marine Mammals
Encyclopedia of Marine Mammals

Author: William F. Perrin

Publisher: Academic Press

Published: 2009-02-26

Total Pages: 1355

ISBN-13: 0080919936

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This thorough revision of the classic Encyclopedia of Marine Mammals brings this authoritative book right up-to-date. Articles describe every species in detail, based on the very latest taxonomy, and a host of biological, ecological and sociological aspects relating to marine mammals. The latest information on the biology, ecology, anatomy, behavior and interactions with man is provided by a cast of expert authors – all presented in such detail and clarity to support both marine mammal specialists and the serious naturalist. Fully referenced throughout and with a fresh selection of the best color photographs available, the long-awaited second edition remains at the forefront as the go-to reference on marine mammals. - More than 20% NEW MATERIAL includes articles on Climate Change, Pacific White-sided Dolphins, Sociobiology, Habitat Use, Feeding Morphology and more - Over 260 articles on the individual species with topics ranging from anatomy and behavior, to conservation, exploitation and the impact of global climate change on marine mammals - New color illustrations show every species and document topical articles FROM THE FIRST EDITION "This book is so good...a bargain, full of riches...packed with fascinating up to date information. I recommend it unreservedly it to individuals, students, and researchers, as well as libraries." --Richard M. Laws, MARINE MAMMALS SCIENCE "...establishes a solid and satisfying foundation for current study and future exploration" --Ronald J. Shusterman, SCIENCE

Ethology and Behavioral Ecology of Odontocetes
Ethology and Behavioral Ecology of Odontocetes

Author: Bernd Würsig

Publisher: Springer

Published: 2019-08-02

Total Pages: 508

ISBN-13: 3030166635

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This book concentrates on the marine mammalian group of Odontocetes, the toothed whales, dolphins, and porpoises. In 23 chapters, a total of 40 authors describe general patterns of ethological concepts of odontocetes in their natural environments, with a strong bent towards behavioral ecology. Examples are given of particularly well-studied species and species groups for which enough data exist, especially from the past 15 years. The aim is to give a modern flavor of present knowledge of ethology and behavior of generally large-brained behaviorally flexible mammals that have evolved quite separately from social mammals on land. As well, the plight of populations and species due to humans is described in multiple chapters, with the goal that an understanding of behavior can help to solve or alleviate at least some human-made problems.

Ecosystem Effects of Fishing in the Mediterranean
Ecosystem Effects of Fishing in the Mediterranean

Author: Sergi Tudela

Publisher: Food & Agriculture Org.

Published: 2004

Total Pages: 60

ISBN-13: 9789251051924

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Most of the major impacts of fishing on the ecosystems recorded around the world occur in the Mediterranean. This variety of interactions is due to four main interrelated factors: the wide range of fishing gear and practices; very intensive fishing; a high diversity of exploited habitats, ranging from shallow water to the deep-sea and oceanic domain; and high biological diversity.

The Marine Mammals of the Gulf of Mexico
The Marine Mammals of the Gulf of Mexico

Author: Bernd G. Würsig

Publisher: W. L. Moody JR. Natural Histor

Published: 2000

Total Pages: 312

ISBN-13:

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Given in honor of District Governor Hugh Summers and Mrs. Ahnise Summers by the Rotary Club of Aggieland with matching support from the Sara and John H. Lindsey '44 Fund, Texas A & M University Press, 2004.

Report of the Expert Workshop on means and methods for reducing marine mammal mortality in fishing and aquaculture operations
Report of the Expert Workshop on means and methods for reducing marine mammal mortality in fishing and aquaculture operations

Author: Food and Agriculture Organization of the United Nations

Publisher: Food & Agriculture Org.

Published: 2018-08-29

Total Pages: 124

ISBN-13: 9251306435

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The workshop discussed current knowledge on marine mammal bycatch questions, evaluated the efficacy of measures for mitigating bycatch, reviewed techniques across different gear types and recommended that FAO develop Technical Guidelines.

Marine Mammal Welfare
Marine Mammal Welfare

Author: Andy Butterworth

Publisher: Springer

Published: 2017-06-19

Total Pages: 625

ISBN-13: 3319469940

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Marine mammals attract human interest – sometimes this interest is benign or positive – whale watching, conservation programmes for whales, seals, otters, and efforts to clear beaches of marine debris are seen as proactive steps to support these animals. However, there are many forces operating to affect adversely the lives of whales, seals, manatees, otters and polar bears – and this book explores how the welfare of marine mammals has been affected and how they have adapted, moved, responded and sometimes suffered as a result of the changing marine and human world around them. Marine mammal welfare addresses the welfare effects of marine debris, of human traffic in the oceans, of noise, of hunting, of whale watching and tourism, and of some of the less obvious impacts on marine mammals – on their social structures, on their behaviours and migration, and also of the effects on captivity for animals kept in zoos and aquaria. There is much to think and talk about – how marine mammals respond in a world dramatically influenced by man, how are their social structures affected and how is their welfare impacted?

Marine Mammal Research
Marine Mammal Research

Author: John Elliott Reynolds

Publisher: JHU Press

Published: 2005-11-18

Total Pages: 254

ISBN-13: 9780801882555

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Marine mammal conservation presents a number of challenges for scientists. This work presents an argument about how science, if conducted properly, can provide insights needed to minimise crisis management and implement more anticipatory action.