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Distribution and Abundance of Maui's Dolphins (Cephalorhynchus Hectori Maui) Along the North Island West Coast, New Zealand

2003 Nature
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Release : 2003
Genre : Nature
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Book Synopsis Distribution and Abundance of Maui's Dolphins (Cephalorhynchus Hectori Maui) Along the North Island West Coast, New Zealand by : S. M. Ferreira

Download or read book Distribution and Abundance of Maui's Dolphins (Cephalorhynchus Hectori Maui) Along the North Island West Coast, New Zealand written by S. M. Ferreira. This book was released on 2003. Available in PDF, EPUB and Kindle. Book excerpt:

All in a DNA's Work

2014 Animal population genetics
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Release : 2014
Genre : Animal population genetics
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Book Synopsis All in a DNA's Work by : Rebecca Marie Hamner

Download or read book All in a DNA's Work written by Rebecca Marie Hamner. This book was released on 2014. Available in PDF, EPUB and Kindle. Book excerpt: The critically endangered Maui's dolphin (Cephalorhynchus hectori maui) and the endangered Hector's dolphin (C. h. hectori) are endemic to the coastal waters of New Zealand, where their primary threat is fisheries-related mortality. The Maui's dolphin is among the most critically endangered cetaceans in the world, with its remnant population primarily concentrated in approximately 140 km along the central west coast of New Zealand's North Island. Its closely related sister subspecies, the Hector's dolphin, is more abundant and offers a useful comparison for studying the Maui's dolphin. My work used genetic tools to examine demographic and genetic parameters relevant for conservation considerations regarding Maui's and Hector's dolphins, as well as to build upon past genetic baselines for the purpose of long-term genetic monitoring of these subspecies. Three genetic datasets formed the basis for most analyses: (1) Maui's 01-07, including 54 Maui's dolphin individuals sampled between 2001 and 2007 (n = 70 biopsies, 12 beachcast); (2) Maui's 10-11, including 40 Maui's dolphin individuals sampled in 2010 and 2011 (n = 69 biopsies, 1 beachcast); and (3) Hector's CB11-12, including 148 Hector's dolphin individuals sampled in Cloudy Bay in 2011 and 2012 (n = 263 biopsies). Microsatellite genotypes were used to identify individuals for a genotype recapture abundance estimate of individuals age 1 (N1+) and for the estimation of effective population size (N[subscript e]). Both populations exhibited a high N[subscript e] relative to N1+, consistent with expectations given their life history characteristics and the limited data available for other dolphin species. The abundance of Maui's dolphins was confirmed to be very low, Maui's 10-11 N1+ = 55 (95% CL = 48 - 69), and as expected, it had much lower linkage disequilibrium N[subscript e] (61, 95% CL = 29 - 338) than Hector's CB11-12 (N[subscript e] = 207, 95% CL = 127 - 447; N1+ = 272, 95% CL = 236 - 323). The slightly higher Ne/N1+ ratio of the Maui's dolphin compared to the Hector's dolphin is consistent with a recent decline in the Maui's dolphin. Although the point estimates of both N[subscript e] and N1+ decreased between the two Maui's dolphin datasets (Maui's 01-07: N[subscript e] = 74, 95% CL = 37 - 318; N1+ = 69, 95% CL = 38 - 125), the confidence intervals widely overlapped. Maui's 10-11 had significantly fewer alleles (average 4 alleles/locus) and lower heterozygosity (H0 = 0.316, H[subscript e] = 0.319) than Hector's CB11-12 (average 7 alleles/locus, H0 = 0.500, H[subscript e] = 0.495; all P

Encyclopedia of Marine Mammals

2009-02-26 Science
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Release : 2009-02-26
Genre : Science
Kind : eBook
Book Rating : 936/5 ( reviews)

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Book Synopsis Encyclopedia of Marine Mammals by : William F. Perrin

Download or read book Encyclopedia of Marine Mammals written by William F. Perrin. This book was released on 2009-02-26. Available in PDF, EPUB and Kindle. Book excerpt: 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

Marine Mammal Observer and Passive Acoustic Monitoring Handbook

2015-03-02 Science
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Release : 2015-03-02
Genre : Science
Kind : eBook
Book Rating : 683/5 ( reviews)

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Book Synopsis Marine Mammal Observer and Passive Acoustic Monitoring Handbook by : Victoria Todd

Download or read book Marine Mammal Observer and Passive Acoustic Monitoring Handbook written by Victoria Todd. This book was released on 2015-03-02. Available in PDF, EPUB and Kindle. Book excerpt: Marine Mammal Observer and Passive Acoustic Monitoring Handbook is the ultimate instruction manual for mitigation measures to minimise man-made acoustical and physical disturbances to marine mammals from industrial and defence activities. Based on more than two decades of offshore experience, and a decade of supplying MMO and PAM services (commercial and scientific), the Handbook is a long-overdue reference guide that seeks to improve standards worldwide for marine operations such as seismic and drilling exploration, wind farm and civil engineering piling, dredging, trenching, rock-dumping, hydrographical surveys, and military/defence exercises. By popular request, this manual will also form an accompaniment to MMO and PAM courses. The Handbook consolidates all aspects of this discipline into one easily accessible resource, to educate all stakeholders (e.g. MMOs, PAM operators, suppliers, recruitment agencies, clients, contractors, regulators, NGOs, consultants, scientists, academia and media), regardless of experience. Topics include worldwide legislation, compliance, anthropogenic noise sources and potential effects, training, offshore life, visual and acoustic monitoring (theory and practice), marine mammal distribution, hearing and vocalisations, and report writing. Advice is provided on implementing sensible and practical mitigation techniques, appropriate technologies, data collection, client and regulator liaison, and project kick-off meetings. "The Handbook is an indispensable How To guide to the growing and increasingly important occupation of marine mammal monitoring, written with clarity and humor by scientists who have extensive experience in this field." —Dr Phillip J. Clapham, world-renowned cetologist and Director of the Cetacean Assessment and Ecology Program at the National Marine Mammal Laboratory in Seattle.

Distribution of Maui's Dolphin (Cephalorhynchus Hectori Maui)

2010 Aerial surveys in wildlife management
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Release : 2010
Genre : Aerial surveys in wildlife management
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Book Rating : 305/5 ( reviews)

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Book Synopsis Distribution of Maui's Dolphin (Cephalorhynchus Hectori Maui) by :

Download or read book Distribution of Maui's Dolphin (Cephalorhynchus Hectori Maui) written by . This book was released on 2010. Available in PDF, EPUB and Kindle. Book excerpt: Maui's dolphin (Cephalorhynchus hectori maui) is a highly endangered subspecies that is only found off the coast of New Zealand. Reliable distribution data are highly important for the protection and management of this cetacean. Several Maui's dolphin surveys have been carried out in recent years. This report aims to synthesise these distribution data into one accessible document, which should assist managers in determining boundaries for the protection areas needed to halt population decline. Recent systematic offshore surveys of Maui's dolphin distribution indicate that the subspecies is regularly found between Kaipara Harbour to the north, and Kawhia Harbour to the south, while opportunistic and alongshore survey sightings indicate that Maui's dolphins are occasionally seen further south. The surveys also indicate that while many sightings of Maui's dolphins occur within the current 4 nautical mile (7.4 km) gillnet-fishing restricted area boundary, there have been reliable sightings of Maui's dolphins outside this area. These offshore sightings happen particularly, but not exclusively, during winter months. Verified sightings by members of the public can also provide useful information on distribution. Several sightings reported by members of the public have also occurred near New Plymouth, which is south of the current protected area. Maui's dolphins have been reported by members of the public in several of the North Island harbours, including Kaipara, Raglan, and especially Manukau. Passive acoustic monitoring of Manukau Harbour suggests that Maui's dolphins regularly use the areas near or beyond the current protected area of outer Manukau Harbour. Given the highly endangered status of this subspecies, proposals for protected areas need to consider not only the core home range area, but also those areas occasionally visited by the animals. These considerations should apply to both offshore and alongshore boundaries.

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