Recently added articles from Aquatic Mammals:
Activity Budgets and Prey Consumption of Sea Otters (Enhydra lutris kenyoni) in Washington
Oct 01, 2008; ... Abstract Northern sea otters (Enhydra lutris kenyoni) were extirpated from the Washington coast in the early 1900s. Reintroductions of sea otters from Amchitka Island, Alaska, occurred in 1969 and 1970. By 2005, 814 sea otters occupied a range from Destruction Island north to Makah Bay ....
Effects of Human Traffic on the Movement Patterns of Hawaiian Spinner Dolphins (Stenella longirostris) in Kealakekua Bay, Hawaii
Oct 01, 2008; ... Abstract Kealakekua Bay is an important resting site for Hawaiian spinner dolphins (Stenella longirostris) and is popular with both local residents and tourists. Human activities occurring here include swimming, snorkeling, kayaking, and motor-boating. The objectives of this study were ...
Immunosuppression Cascade in the Florida Manatee (Trichechus manatus latirostris)
Oct 01, 2008; ... Abstract The Florida manatee (Trichechus manatus latirostris) is a federally endangered marine mammal that resides on both coasts of the Florida peninsula. The species faces many anthropogenic and natural threats, including boat strikes, exposure to harmful algal blooms, and cold water ...
Effect of Two Levels of Masking Noise on the Hearing Threshold of a Harbor Porpoise (Phocoena phocoena) for a 4.0 kHz Signal
Oct 01, 2008; ... Abstract The 50% detection hearing thresholds of a harbor porpoise for a 4.0 kHz narrow-band FM signal, presented at the background noise level in a pool and with two masking noise levels, were measured using a go/no-go response paradigm and an updown staircase psychometric method. The ...
Field Notes on Risso's Dolphin (Grampus griseus) Distribution, Social Ecology, Behaviour, and Occurrence in the Azores
Oct 01, 2008; ... Abstract This study reports new information on Grampus griseus (G. Cuvier, 1812) distribution with depth and slope, group size, general and interspecific behaviour, and calving intervals for the Azorean archipelago. Observations are in agreement with scarce previous work and most other ...
A Long-Term Opportunistic Photo-Identification Study of Bottlenose Dolphins (Tursiops truncatus) off Aberdeen, United Kingdom: Conservation Value and Limitations
Oct 01, 2008; ... Abstract The waters of the Inner Moray Firth were designated a Special Area of Conservation (SAC) in 2005 for the conservation of the bottlenose dolphin (Tursiops truncatus) in northeast Scotland. However, the long-term conservation of this population requires monitoring throughout its ...
Acoustic Behavior of Antarctic Killer Whales (Orcinus orca) Recorded Near the Ice Edge of McMurdo Sound, Antarctica
Oct 01, 2008; ... Abstract Underwater acoustic recordings of a group of seven to nine killer whales (Orcinus orca) were made opportunistically along a lead within the fast-ice in McMurdo Sound, Ross Sea, Antarctica in early December 1979. At the time of the recordings, the killer whale group was chasing ...
The Song of the Southeast Pacific Humpback Whale (Megaptera novaeangliae) off Las Perlas Archipelago, Panama: Preliminary Characterization
Oct 01, 2008; ... Abstract Humpback whales (Megaptera novaeangliae) aggregate in winter breeding and calving grounds in tropical waters. Acoustic features of song produced by males in breeding wintering areas remain unknown for many breeding sites such as those located in Central America. In other areas, ...
Burst-Pulse Sounds Recorded from White-Beaked Dolphins (Lagenorhynchus albirostris)
Oct 01, 2008; ... Abstract Dolphin sounds are generally categorized as tonal whistles or pulsed clicks. Pulsed signals in dolphins are usually associated with echolocation; however, an increasing number of species have been found to produce burst-pulse signals, which may be used for communication. Groups ...
Historical Perspectives: Sam H. Ridgway (born 26 June 1936)
Oct 01, 2008; ... Dr. Sam Ridgway is one of the founders of mammal medicine. He completed a large share of the seminal work in marine mammal medicine, and he continues to promote both applied and basic research in the field of marine mammalogy. He has published over 260 papers, book chapters, and books, including ...
History of Veterinary Medicine and Marine Mammals: A Personal Perspective
Oct 01, 2008; ... "The best doctor in the world is the veterinarian. He can't ask his patients what is the matter-he's got to just know." Will Rogers "The greatness of a nation and its moral progress can be judged by the way its animals are treated." Mahatma Gandhi Treatment of animal injuries and ...
Dolphin Morbillivirus in the Mediterranean Sea
Oct 01, 2008; ... Between the end of 2006 and the beginning of 2007, a morbilliviral infection epidemic was reported in pilot whales (Globicephala melas) around Gibraltar (Fernández et al., 2008) and, in the following months, in pilot whales and striped dolphins (Stenella coeruleoalba) along the Spanish coast ...
Behaviour Patterns in Captive Manatees (Trichechus manatus manatus) at Itamaracá Island, Brazil
Jul 01, 2008; ... Abstract The Antillean manatee (Trichechus manatus manatus) is distributed along much of the northern and eastern coasts of Brazil, although relatively little is known of the ecology or behaviour of the members of this population. In the present study, the behaviour of seven juvenile ...
Causes and Extent of Natural Mortality Among Steller Sea Lion (Eumetopias jubatus) Pups
Jul 01, 2008; ... Abstract The authors studied the causes and extent of mortality in endangered Steller sea lion (Eumetopias jubatus) pups at a small rookery in the northern Gulf of Alaska over seven consecutive summers (2001 to 2007). Mortality among pups up to 2.5 mo post-partum (n = 69) averaged 15.4% ...
To Whistle or Not to Whistle? Geographic Variation in the Whistling Behavior of Small Odontocetes
Jul 01, 2008; ... Abstract Whistles are used by odontocetes to varying degrees. During a visual and acoustic survey of dolphin abundance in the eastern tropical Pacific Ocean (ETP), whistles were heard from 66% of single species schools and from 98% of mixed species schools. In contrast, whistles were ...
Resident Harbor Seals (Phoca vitulina) in Iliamna Lake, Alaska: Summer Diet and Partial Consumption of Adult Sockeye Salmon (Oncorhynchus nerka)
Jul 01, 2008; ... Abstract This study assessed the summer diet and consumption patterns of harbor seals (Phoca vitulina) resident in Iliamna Lake, Alaska. The authors predicted that adult sockeye salmon (Oncorhynchus nerka), a seasonally abundant and nutrient-rich prey source, would dominate diets when ...
Effects of Biopsy Sampling on Indo-Pacific Humpback Dolphins (Sousa chinensis) in a Polluted Coastal Environment
Jul 01, 2008; ... Abstract We conducted a biopsy sampling study of Indo-Pacific humpback dolphins (Sousa chinensis) in Hong Kong between October 2004 and January 2006. Humpback dolphins were sampled with a Barnett Ranger RX-150 crossbow. In total, 87 shots were taken at ranges of 8 to 28 m, and 36 tissue ...
South American Sea Lions (Otaria flavescens) Avoid Killer Whale (Orcinus orca) Predation
Jul 01, 2008; ... Abstract South American sea lions (Otaria flavescens) are predictably preyed on by killer whales (Orcinus orca) at their breeding colonies in Peninsula Valdés, Argentina. Captures occur in shallow waters along the coastline. Killer whales strand in the surf where sea lion pups practice ...
Group Movements of White-Beaked Dolphins (Lagenorhynchus albirostris) near Halifax, Canada
Jul 01, 2008; ... Abstract Movement patterns of animals are important in understanding their role in the environment (e.g., foraging, residency) and may provide insight into an animal's life history and social structure. Movement is particularly important for animals where resources are highly temporally ...
Assessment of Nonmetric Skull Characters of the Franciscana (Pontoporia blainvillei) in Determining Population Differences
Jul 01, 2008; ... Abstract The franciscana (Pontoporia blainvillei) is a small endemic dolphin of the Atlantic coast of Brazil, Uruguay, and Argentina that presents conservation problems because of its incidental mortality in nets of artisanal fisheries throughout its entire distribution. An important ...