Download or read book Humpback Whale Megaptera Novaeangliae Entanglement in Fishing Gear in Northern Southeastern Alaska written by Janet L. Neilson and published by . This book was released on 2006 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The prevalence of non-lethal entanglements of humpback whales (Megaptera novaeangliae) in fishing gear in northern southeastern Alaska (SEAK) was quantified using a scar-based method. The percentage of whales assessed to have been entangled ranged from 52% (minimal estimate) to 71% (conditional estimate) to 78% (maximal estimate). The conditional estimate is recommended because it is based solely on unambiguous scars. Eight percent of the whales in Glacier Bay/Icy Strait acquired new entanglement scars between years, although the sample size was small. Calves were less likely to have entanglement scars than older whales and males may be at higher risk than females. The temporal and spatial distribution of commercial fisheries is complex and difficult to correlate with these results. The percentage of whales with entanglement scarring is comparable to the Gulf of Maine where entanglement is a substantial management concern. Consequently, SEAK humpback whale-fisheries interactions may warrant a similar level of scrutiny"--Leaf iii.

Download or read book Humpback Whale Megaptera Novaeangliae Entanglements in Commercial Fishing Gear on the U S West Coast written by Rachel Assink and published by . This book was released on 2019 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2015, humpback whales (Megaptera novaeangliae) on the U.S. West Coast were separated into three Distinct Population Segments (DPSs) under the Endangered Species Act, but have remained one stock under the Marine Mammal Protection Act. The mismatch between stock structure and DPS structure under these two different laws has created several management challenges, particularly in terms of assessing allowable levels of human-caused mortalities. Entanglement in commercial fishing gear presents a significant source of mortality and injury for humpback whales, and entanglement reports on the West Coast have significantly increased since 2014. I address some of the implications of a future change in stock structure to match the DPS structure by assessing 1) which DPSs are most likely to be affected by entanglements, examining differential levels of mortality and serious injury, and 2) examining reductions in mortality needed to achieve management goals. I find that under a revised stock structure consistent with DPS designations, current entanglement rates exceed allowable mortality levels for the endangered Central America population.

Download or read book Meeting to Review Ongoing and Planned Research Concerning Humpback Whales in Glacier Bay and Surrounding Waters in Southeast Alaska written by and published by . This book was released on 1981 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Humpback Whales in Glacier Bay National Monument Alaska written by United States. Marine Mammal Commission and published by Good Press. This book was released on 2023-09-17 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 'Humpback Whales in Glacier Bay National Monument, Alaska,' the United States Marine Mammal Commission provides a comprehensive study on the migration patterns, behavior, and conservation status of the iconic humpback whales in this particular region. The book is written in a scientific and analytical style, with detailed observations and data analysis that contribute to our understanding of the marine ecosystem within Glacier Bay National Monument. The authors utilize a multidisciplinary approach, combining biology, ecology, and environmental science to paint a holistic picture of the humpback whale population in Alaska. This book is a valuable resource for researchers, conservationists, and anyone interested in marine mammal studies. It sheds light on the importance of preserving the delicate balance of marine life in this unique and biodiverse region. The authors, affiliated with the Marine Mammal Commission, bring a wealth of expertise and experience to the subject matter, making this book a relevant and authoritative source for marine conservation efforts. Readers will gain insight into the complex interactions between humpback whales and their environment, which will deepen their appreciation for these majestic creatures and the continued need for conservation initiatives.

Download or read book Alaska Marine Mammal Stock Assessments 1996 written by P. S. Hill and published by . This book was released on 1997 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: "On April 30, 1994, Public Law 103-238 was enacted allowing significant changes to provisions within the Marine Mammal Protection Act (MMPA). Interactions between marine mammals and commercial fisheries are addressed under three new sections. This new regime replaced the interim exemption that has regulated fisheries-related incidental takes since 1988. Section 117, Stock Assessments, required the establishment of three regional scientific review groups to advise and report on the status of marine mammal stocks within Alaska waters, along the Pacific Coast (including Hawaii), and the Atlantic Coast (including the Gulf of Mexico). This report provides information on the marine mammal stocks of Alaska under the jurisdiction of the National Marine Fisheries Service"--Preface. [doi:10.7289/V5/TM-AFSC-78 (https://doi.org/10.7289/V5/TM-AFSC-78)]

Download or read book Marine Debris in Alaska written by and published by University of Alaska Fairbanks. This book was released on 2009 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CRC Handbook of Marine Mammal Medicine written by Frances M.D. Gulland and published by CRC Press. This book was released on 2018-03-20 with total page 2192 pages. Available in PDF, EPUB and Kindle. Book excerpt: AAP Prose Award Finalist 2018/19 For three decades, this book has been acknowledged as the most respected scientific reference specifically devoted to marine mammal medicine and health. Written by approximately 100 contributors who are recognized globally as leaders in their respective fields, the CRC Handbook of Marine Mammal Medicine, Third Edition continues to serve as the essential guide for all practitioners involved with marine mammals including veterinarians, technicians, biological researchers, students, managers, keepers, curators, and trainers. The 45 chapters provide essential information for the practitioner on pathology, infectious diseases, medical treatment, anesthesia, surgery, husbandry, health assessment, species-specific medicine, medically pertinent anatomy and physiology, and global health concerns such as strandings, oil spills, and entanglements of marine mammals. Covers all aspects of marine mammal veterinary practice Written by internationally acknowledged experts Adds new chapters on Ophthalmology, Dentistry, Ethics, Oil Spill Response, Health Assessments, Whale Entanglement Response, Dive Response, and Biotoxins Richly illustrated in color throughout the new edition including updated anatomical drawings and extensive photographs of ocular lesions Provides guidance to websites that regularly present updated information and images pertinent to current marine mammal medicine such as imaging and stranding network contacts Discusses ethics and animal welfare. The book guides the reader through the veterinary care of cetaceans, pinnipeds, manatees, sea otters, and polar bears. In addition to summaries of current knowledge, chapters provide information on those digital resources and websites which present the latest information as it emerges in the field. The CRC Handbook of Marine Mammal Medicine, Third Edition gives a call to action for scientists to experiment with new endeavors to engage and inspire current and future generations to care for marine mammals and the marine environment, and work together to find solutions. As the most trusted reference for marine mammal conservation medicine and for marine mammal medical facilities around the world, this book needs to be in your library.

Download or read book Marine Mammal Welfare written by Andy Butterworth and published by Springer. This book was released on 2017-06-19 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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?

Download or read book Aspects of the Foraging Ecology of Humpback Whales Megaptera Novaeangliae in Frederick Sound and Stephens Passage Southeast Alaska written by Andrew Szabo and published by . This book was released on 2012 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The North Pacific humpback whale (Megaptera novaeangliae) population has been increasing at an average annual rate of ~6% since the early 1990s. In northern Southeast Alaska alone, there are now more whales than estimated for the entire North Pacific several decades ago. An understanding of how this growing population is repopulating traditional foraging grounds will benefit from detailed investigations of their prey preferences and trends in whale abundance and distribution relative to those prey. This dissertation examines these issues from late May until early September 2008 in Frederick Sound and Stephens Passage, a Southeast Alaskan feeding area historically used by humpback whales. The foundation for the study is an analysis of the life histories and abundance patterns of euphausiids, the principal prey of humpbacks in the area, during late spring and summer. Four species, Thysanoessa raschii, T. longipes, T. spinifera, and Euphausia pacifica, were identified in plankton net samples collected at random locations throughout the study site (n = 49) and in locations where a strong scattering layer was observed on a 120 kHz echosounder (n = 48). Both sample types varied in euphausiid species composition. Abundance patterns of immature euphausiids coupled with observations of females carrying spermatophores indicated differences between species in spawning schedules. Thysanoessa spp. began spawning in early April with the spring phytoplankton bloom and continued until late June, whereas E. pacifica began spawning in early June and continued until late August. This protracted recruitment of immature euphausiids was geographically widespread throughout the summer in contrast to adults, which, although present all summer, were found primarily in slope and shallow (

Download or read book Arctic Marine Sustainability written by Eva Pongrácz and published by Springer Nature. This book was released on 2020-03-06 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest scientific views on resource use conflicts in the Arctic seas. The main areas of focus are the biological resources of Arctic seas vs. exploitation of oil and gas resources, and the conflicts in between. In addition, climate change is presented as a stressor, which both limits and facilitates the economic availability of resources in the Arctic. The book is divided into five parts. Part 1 examines Arctic ecosystems, resilience of the marine environment and possible conflicts between industrial sector and biological world. The focus of Part 2 is on transport infrastructure along the northern routes. Issues such as Arctic maritime operations, black carbon and unmanned aerial vehicles are considered. Part 3 focuses on resource use conflicts in Arctic seas and on the most recent threats in terms of Arctic oil and gas exploration, offshore logistics operations as well as transportation of oil and oil products. Discussions in Part 4 of the book are concentrated around social aspects and involvement of local communities. Tourism development, preservation of indigenous culture, engagement of communities on relevant Arctic issues, search and rescue in the cold marine environment are examples of questions raised. The book reviews Arctic-specific petroleum regulations, the state of preparedness to oil spill accidents in the region as well as the latest developments in oil spill response technologies and their limitations. Search and rescue operations are reviewed and how working in this harsh Arctic environment affects the ability of rescue technicians to perform the required technical skills. Part 5 considers the sustainability challenges arising from the marine resource exploitation. The focus is on the vulnerability of Arctic ecosystems to disturbance – both natural and anthropogenic.

Download or read book Entanglements written by Tora Johnson and published by University Press of Florida. This book was released on 2007-09-23 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Entanglements explores the clash of cultures and personalities among fishermen, scientists, and whale advocates struggling to save both the endangered North Atlantic right whale and the livelihoods of thousands of Atlantic coastal families. By most counts, about 300 of these whales remain in the North Atlantic, and scientists warn that collisions with fishing gear are contributing to their decline. The political climate that surrounds the world's most endangered large whale is contentious, complex, and heartrending. Without pointing fingers or laying blame, Tora Johnson explores every side of the issue. She takes us to sea with fishermen who struggle to stay in business, setting traps and gillnets in the whale's habitat, and with members of the rescue teams who attempt to cut away deadly rope and net from whales in the wild. Weaving their stories and her personal observations into a discussion of the science and history of the conflict, she offers an admirable balance of perceptions, backgrounds, and agendas. Her thoughtful discussion of the plight of fishermen and whales and of the frustrations between fishing communities and conservationists presents an authentic microcosm of the global conflict between human demands on the environment and nature's finite capacity for supporting those demands.

Download or read book Effects of the Exxon Valdez Oil Spill on the Abundance and Distribution of Humpback Whales Megaptera Novaeangliae in Prince William Sound written by Marilyn E. Dahlheim and published by . This book was released on 1993 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Frederick Sound Humpback Whales written by and published by . This book was released on 1999 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toward the Social and Acoustic Ecology of Social Foraging Humpback Whales Megaptera Novaeangliae in Southeast Alaska written by Sean Frederick Thurman Hanser and published by . This book was released on 2009 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Social Foraging of the Southeast Alaskan Humpback Whale Megaptera Novaengliae written by Fred Sharpe and published by . This book was released on 2001 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Relative to other baleen whale populations, the humpback whales Megaptera novaeangliae inhabiting Southeast Alaska are noteworthy in that they form large, enduring groups when foraging on schools of Pacific herring Clupea harengus pallasi. These groups use a variety of unusual feeding tactics when attacking prey, including the production of loud feeding calls, the release of bubbles, and the waving of their large pectoral flippers. Past observations of these groups have been largely anecdotal so little is known about their social behavior or the function of their feeding tactics. In particular, it is unclear if these pods are based on cooperative interactions or if they represent groups of individuals who are competing for prey that occurs in dense aggregations. In addition, little is known about the underlying social structure of these pods and whether they are composed of kin. The objective of this study was to employ field and laboratory techniques to gain insight into the function of the unusual feeding tactics, and to describe the basic social structure of these pods. In order to test the prediction that bubbles, feeding calls, and flipper movements represent prey manipulation tactics, herring schools were brought into the laboratory and subjected to various simulated humpback whale feeding behaviors. I found that these simulated behaviors produced strong avoidance responses from the herring schools, suggesting that humpback whales use these tactics to manipulate the behavior of their prey. Seven years of field observations revealed that humpbacks with enduring social bonds (i.e., high coefficients of association) specialized on herring and represented a small proportion of the entire whale population. Calves born to these "core members" were never observed to return and feed with their mothers in subsequent years, suggesting that these groups are not composed of close kin. This was verified by analysis of haplotype variation in the mitochondrial genome and microsatellite variation in the nuclear genome. Individuals within these pods appear to invest in by-product benefits, with the enduring bonds between whales in Chatham Strait (cf. krill feeders in Frederick Sound) possibly representing combinations of individuals performing compatible tasks (Le., bubble blower, herder, vocalizer).

Download or read book Annual Report of the Marine Mammal Commission written by United States. Marine Mammal Commission and published by . This book was released on 1992 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seasonal Characteristics of Humpback Whales Megaptera Novaeangliae in Southeastern Alaska written by Janice M. Straley and published by . This book was released on 1994 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: