Download or read book Grey Seals Halichoerus Grypus in the Dutch North Sea Population Ecology and Effects of Wind Farms written by Sophie M.J.M. Brasseur and published by . This book was released on 2010 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Routledge Handbook of Ecotourism written by David A. Fennell and published by Routledge. This book was released on 2021-09-21 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook presents a timely, broad-ranging, and provocative overview of the essential nature of ecotourism. The chapters will both advance the existing central themes of ecotourism and provide challenging and divergent observations that will thrust ecotourism into new areas of research, policy, and practice. The volume is arranged around four key themes: sustainability, ethics and identity, change, conflict, and consumption, and environment and learning, with a total of 28 chapters. The first section focuses on sustainability as a core ecotourism criterion, with a primary focus on some of the macro sustainability issues that have an impact on ecotourism. Foremost among these topics is the linkage to the UN’s Sustainable Development Goals, which have relevance to ecotourism as one of the greenest or most responsible forms of tourism. The chapters in the second section provide a range of different topics that pull ecotourism research into new directions, including a chapter on enriching indigenous ecotourism through culturally sensitive universalism. The third section includes chapters on topics ranging from persons with disabilities as a neglected body of research in ecotourism, to ecotourism as a form of luxury consumption. The final section emphasises the link between ecotourism and learning about the natural world, including a deeply theoretical chapter on rewilding Europe. With contributions from authors around the world, this handbook gives a global platform to local voices, in both developed and emerging country contexts. The multidisciplinary and international Routledge Handbook of Ecotourism will be of great interest to researchers, students, and practitioners working in tourism and sustainability.
Download or read book Wildlife and Wind Farms Conflicts and Solutions written by Martin Perrow and published by Pelagic Publishing Ltd. This book was released on 2019-01-17 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind farms are an essential component of global renewable energy policy and the action to limit the effects of climate change. There is, however, considerable concern over the impacts of wind farms on wildlife, leading to a wide range of research and monitoring studies, a growing body of literature and several international conferences on the topic. This unique multi-volume work provides a comprehensive overview of the interactions between wind farms and wildlife. Volume 3 documents the current knowledge of the potential effects upon wildlife during both construction and operation of offshore wind farms. An introductory chapter on the nature of wind farms and the legislation surrounding them is followed by a series of in-depth chapters documenting effects on physical processes, atmosphere and ocean dynamics, seabed communities, fish, marine mammals, migratory birds and bats and seabirds. A synopsis of the known and potential effects of wind farms upon wildlife concludes the volume. The authors have been carefully selected from across the globe from the large number of academics, consultants and practitioners now engaged in wind farm studies, for their influential contribution to the science. Edited by Martin Perrow and with contributions by 30 leading researchers including: Göran Broström, Steven Degraer, Mike Elliot, Andrew Gill, Ommo Hüppop, Georg Nehls and Nicolas Vanermen. The authors represent a wide range of organisations and institutions including the Universities of Gothenburg, Hamburg and Hull, Alfred Wegener Institute, Cefas (UK), Research Institute for Nature and Forest (INBO), Royal Belgian Institute of Natural Sciences, Vattenfall and several leading consultancies. Each chapter includes informative figures, tables, colour photographs and detailed case studies, including some from invited authors to showcase exciting new research. Other volumes: Volume 1: Onshore: Potential Effects (978-1-78427-119-0) Volume 2: Onshore: Monitoring and Mitigation (978-1-78427-123-7) Volume 4: Offshore: Monitoring and Mitigation (978-1-78427-131-2)
Download or read book The Effects of Noise on Aquatic Life II written by Arthur N. Popper and published by Springer. This book was released on 2015-11-26 with total page 1243 pages. Available in PDF, EPUB and Kindle. Book excerpt: The meeting of Aquatic Noise 2013 will introduce participants to the most recent research data, regulatory issues and thinking about effects of man-made noise and will foster critical cross-disciplinary discussion between the participants. Emphasis will be on the cross-fertilization of ideas and findings across species and noise sources. As with its predecessor, The Effects of Noise on Aquatic Life: 3rd International Conference will encourage discussion of the impact of underwater sound, its regulation and mitigation of its effects. With over 100 contributions from leading researchers, a wide range of sources of underwater sound will be considered.
Download or read book Offshore Energy and Marine Spatial Planning written by Katherine L. Yates and published by Routledge. This book was released on 2018-03-29 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: The generation of offshore energy is a rapidly growing sector, competing for space in an already busy seascape. This book brings together the ecological, economic, and social implications of the spatial conflict this growth entails. Covering all energy-generation types (wind, wave, tidal, oil, and gas), it explores the direct and indirect impacts the growth of offshore energy generation has on both the marine environment and the existing uses of marine space. Chapters explore main issues associated with offshore energy, such as the displacement of existing activities and the negative impacts it can have on marine species and ecosystems. Chapters also discuss how the growth of offshore energy generation presents new opportunities for collaboration and co-location with other sectors, for example, the co-location of wild-capture fisheries and wind farms. The book integrates these issues and opportunities, and demonstrates the importance of holistic marine spatial planning for optimising the location of offshore energy-generation sites. It highlights the importance of stakeholder engagement in these planning processes and the role of integrated governance, with illustrative case studies from the United States, United Kingdom, northern Europe, and the Mediterranean. It also discusses trade-off analysis and decision theory and provides a range of tools and best practices to inform future planning processes.
Download or read book Seals in Motion written by and published by . This book was released on 2017 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predation of Marine Mammals by Grey Seals Halichoerus Grypus written by Abbo van Neer and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies in recent years have shown that grey seals use other marine mammals such as harbour seals, harbour porpoises and other grey seals in the North Sea as food resource. The first report introducing the hypothesis of grey seals predating marine mammals was published by Belgian scientists in 2012. In 2013 predation of harbour seals was observed for the first time and reported from German waters. The present thesis contains a comprehensive overview of the current state of knowledge on the predation of marine mammals by grey seals in German waters. With the help of two case reports and a detailed evaluation of the existing stranding database encompassing a time series from 1990 until 2017, occurring wound patterns are described and summarised in the form of several assessment criteria. Suggested parameters reflect the most common lesions detected and include besides others, lacerations, a smooth, cut-like wound margin, large parts of skin and underlying tissue that are detached from the body, as well as the loss of blubber tissue. Further, punctate wounds are often found in the blubber tissue and for porpoises also in the skin. Moreover punctuate fractures are repeatedly found, for example on the scapula or the lower jaw. Besides the lesions induced by grey seals, an overview on assessment criteria for an interaction with a fox is also given. Here especially a ragged wound margin is seen as relevant. Presented findings resulting from the macroscopic assessment are interpreted and discussed in light of former publications. In addition and complementary to the macroscopic evaluation methods, molecular methods are presented which allow a further characterisation of the predator. The documented behaviour can be regarded as largely consistent over time and between individuals. Whether this is related to a general specialised feeding behaviour or is even related to an individuals' personality remains unclear. Since the first recognition of this behaviour, work has been under way at national and international level to gain a better understanding of its scale and ecological relevance. In view of the presented findings, it must be assumed that this behaviour is at least partially widespread. However, our understanding is not yet sufficient to make a comprehensive assessment of the ecological relevance and should therefore be a major focus of future research. Likewise, through the use of standardised methods, future cross-national comparisons of the recorded data should be supported.
Download or read book The Effects of Habitat on Population Dynamics in an Expanding Population of Grey Seals Halichoerus Grypus on Muskeget Island MA written by Meagan Sims and published by . This book was released on 2013 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Breeding grey seals (Halichoerus grypus) utilize a variety of terrestrial substrates for parturition, nursing, and mating that vary in topographical characteristics and therefore, the availability of suitable habitat is crucial for the persistence of grey seal populations worldwide. This study compared the effects of habitat type over the course of four breeding seasons on Muskeget Island, Massachusetts within and between years on a suite of population parameters including densities, sex ratios, male harem likelihood and mean harem sizes, pups with and without mothers, nursing events, copulation events, pup mortality, and pup developmental stages. The analysis included the 2007, 2008, 2010, and 2012 breeding seasons and compared two beach and three interior habitat types. I predicted that the predominant pupping habitat type used during the breeding season would be exterior beach types because they were composed of expansive, primarily flat substrate representing the first access points when hauling-out. It was expected that these sites would be the locations used by early arriving females and contain higher densities of all age/sex classes. Areas with higher densities were thought to facilitate a greater number of harems with smaller mean harem sizes, fewer pups with mothers, fewer nursing events, more copulation events, higher pup mortality, and more pups in later developmental stages. Overall, densities for all age/sex classes were significantly higher for exterior open beach and thin beach types compared to interior marsh, back beach grass, and inland types, and the use of interior habitats was higher overall in 2012 than in 2007. Sex ratios became more female biased over the course of the study, and were more heavily femaled biased in interior habitat types. Males were more likely to have harems in open beach types while mean harem sizes were significantly larger in interior habitat types, higher in 2012 than 2007, and significantly positively correlated with adult sex ratios in three out of five habitat types. Densely populated exterior sites had more observed copulation events and pup mortality while no differences in nursing events were found. Additionally, a clear shift in habitat use was evident for the 2010 breeding season for all population parameters. Results suggest the primary use of exterior beach habitats during the initial portion of the breeding season, particularly on the north and west sides of Muskeget, with a progression towards interior habitats throughout the season and the use of interior habitat becoming more prevalent over time. As expected, distinct differences in all population parameters were observed for beach vs. interior habitat use, suggesting habitat type plays a considerable role in the population dynamics of breeding grey seals. To date, little is known regarding this breeding population and this study was the first analysis conducted on Muskeget Island to investigate grey seal pupping habitat choice and its potential effects on population dynamics.
Download or read book The Stocks of Grey Seals Halichoerus Grypus and Common Seals Phoca Vitulina in Great Britain written by W. Nigel Bonner and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the American Veterinary Medical Association written by American Veterinary Medical Association and published by . This book was released on 2016 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gray Seals in Nantucket Sound Massachusetts Winter and Spring 1994 written by Valerie Rough and published by . This book was released on 1995 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanic Abstracts written by and published by . This book was released on 1997-04 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recolonization of the Dutch Wadden Sea by the Grey Seal Halichoerus Grypus written by P. J. H. Reijnders and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Harbour Seal Monitoring and Evaluation for the Luchterduinen Offshore Windfarm written by Sophie Brasseur and published by . This book was released on 2018 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Though it seems unlikely that marine mammals, including seals suffer at a large scale from direct mortality caused by the construction or operation of windfarms at sea, they are likely to be affected by disturbance and habitat alterations.In 2014, Luchterduinen windfarm was constructed in the Dutch coastal zone south west of IJmuiden and the permit (WV/2009-1229) requested monitoring with respect to both harbour and grey seals. Two main questions were formulated:1. How do seals use the coastal zone? The aim was to gain insight in harbour and grey seal movement routes along the Dutch North Sea coastal zone (between the Wadden Sea and the Delta region).2. What is the impact of Luchterduinen on seals? (with a focus on the impact of piling).This rapport discusses the results of the harbour seal studies. The initial monitoring (T0-T1; 2013-2015) based on a series of studies on the movements and habitat use of harbour seals deployed in spring (March), was timed in relation to the construction (2014) and operation of the windfarm. These studies were evaluated after T1 (in 2016). It was concluded that by limiting the study to spring deployments, the harbour seals’ habitat use during a large part of the year was missing. Since harbour seals moult in summer, the trackers attached to the fur typically fell off in June –July. In this study (T2-T3) therefore, a deliberate choice was made to study the behaviour of the seals in the post moult, from September onwards. A total of 18 seals were tracked from September onwards: in 2016 (T2) 6 from the Wadden Sea area and 6 from the Delta and again 6 from the Wadden Sea area in 2017(T3).With longer track durations of 20 to 187 days (mean 106 ± 46 days) in this last study information has been collected covering seven calendar months, six of which had not been studied before in this region. However there was large variation in behaviour, possibly but not solely as a result of the male bias in the sample (11 males, 7 females). Though the maximum and mean distance travelled by the seals was slightly less in autumn, the waters in the study area (i.e. the area off the west coast of the Netherlands enclosed by 51.95°N to 52.94°N, and from the coast offshore to 3.73°E) were used much more extensively by the seals tracked in autumn. In total the seals tracked during T2-T3 spent 27.3% of their time in the defined study area, while during spring deployments for T0-T1, this was only 1.5%. Out of the 18 seals tracked in autumn, 11 were observed in the study area. Interestingly these were animals tagged in the Wadden Sea region. During this time of the year animals are mostly feeding, which probably explains their higher presence in the study area. In contrast, during spring, mostly seals from the Delta crossed the study area en route to their breeding sites in the Wadden Sea. This probably explains the limited amount of time spent in the coastal zone. During the complete Luchterduinen study (T0-T3) comprising of 44 animals in spring and 18 in autumn, only one animal entered the Luchterduinen wind farm area. Its visits were short; which suggests it only crossed the area. Animals tracked during T2-T3 were observed more often in the vicinity of the wind farm, compared to the animals tagged during T0-T1.Based on these studies we concluded that harbour seals use the coastal zone west of North and South Holland to migrate to breeding areas in spring/summer, and use it to feed in autumn and winter. Recently, the recovery of the harbour seals in the Wadden Sea has come to a halt. However, pup production in the Wadden Sea is still increasing, and over two thousand pups are born in the Dutch Wadden Sea each year. Since the population size no longer grows, this suggest that an equal number of individuals die each year. Possibly the population has reached a ‘natural’ carrying capacity. However, human use at sea could also play a role in influencing the survival of individuals and the size of the population. Like other North Sea countries, the Dutch government has shown a clear intention to intensify the use of the marine areas in the near future, for windfarms but also sand mining, traffic and aquaculture. Quite likely this will affect the way the seals use the marine area. Further studies are needed to better understand how habitat changes play a role in the survival of individual animals.
Download or read book Pupping Habitat of Grey Seals in the Dutch Wadden Sea written by Sophie Brasseur and published by . This book was released on 2015 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Marine Mammals written by Bernd Würsig and published by Academic Press. This book was released on 2017-11-27 with total page 1195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Marine Mammals, Third Edition covers the ecology, behavior, conservation, evolution, form and function of whales, dolphins, seals, sea lions, manatees, dugongs, otters and polar bears. This edition provides new content on anthropogenic concerns, latest information on emerging threats such as ocean noise, and impacts of climate change. With authors and editors who are world experts, this new edition is a critical resource for all who are interested in marine mammals, especially upper level undergraduate and graduate students, researchers, and managers, and is a top reference for those in related fields, from oceanographers to environmental scientists. - Significant content and topic updates, as well as the addition of new topics in such areas as anthropogenic disturbance - Visual maps of the oceans and seas mentioned in contributions, helping to place the geographical features described in the text with clear, consistent species illustrations - Written to help users learn new information or brush up on a topic quickly, with the references at the end of each entry to help guide readers into more specialist literature
Download or read book Feeding Ecology of the Northwest Atlantic Grey Seal Halichoerus Grypus microform written by Donald Benoit and published by National Library of Canada. This book was released on 1989 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
