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Full-Text Articles in Life Sciences
Changes In Strandings Of Cetaceans In Puget Sound/Salish Sea, Jessica L. Huggins, Amanda Warlick, Stephanie Norman, Jennifer Olson, Dyanna M. Lambourn, Joseph K. Gaydos, John Calambokidis
Changes In Strandings Of Cetaceans In Puget Sound/Salish Sea, Jessica L. Huggins, Amanda Warlick, Stephanie Norman, Jennifer Olson, Dyanna M. Lambourn, Joseph K. Gaydos, John Calambokidis
Salish Sea Ecosystem Conference
No abstract provided.
Capturing Information On Vessels And Cetaceans: Developing A Passive Monitoring System For Boundary Pass, Lauren Mcwhinnie, Patrick O'Hara, Gregory O'Hagan, Molly Fraser, Sarah Berry, Leh Smallshaw, Norma Serra-Sogas, Rosaline Canessa
Capturing Information On Vessels And Cetaceans: Developing A Passive Monitoring System For Boundary Pass, Lauren Mcwhinnie, Patrick O'Hara, Gregory O'Hagan, Molly Fraser, Sarah Berry, Leh Smallshaw, Norma Serra-Sogas, Rosaline Canessa
Salish Sea Ecosystem Conference
As marine traffic intensifies in the Salish Sea, cetaceans, and in particular, Southern Resident Killer Whales (SRKWs), are continually facing increasing amounts of exposure to noise and other disturbances from movements of vessels. While the majority of large vessel activity can be captured and assessed through the use of Automatic Identification Systems (AIS), the contribution of smaller non-AIS vessels is difficult to quantify and currently largely under assessed. Increasingly, government and industry are required to take operational and strategic mitigation measures to minimise vessel disturbances on cetaceans without reliable, comprehensive data and analysis to inform those decisions. Therefore this work …
The Evolutionary History Of Cetacean Brain And Body Size, Stephen H. Montgomery, Jonathan H. Geisler, Michael R. Mcgowen, Charlotte Fox, Lori Marino, John Gatesy
The Evolutionary History Of Cetacean Brain And Body Size, Stephen H. Montgomery, Jonathan H. Geisler, Michael R. Mcgowen, Charlotte Fox, Lori Marino, John Gatesy
Lori Marino, PhD
Cetaceans rival primates in brain size relative to body size and include species with the largest brains and biggest bodies to have ever evolved. Cetaceans are remarkably diverse, varying in both phenotypes by several orders of magnitude, with notable differences between the two extant suborders, Mysticeti and Odontoceti.We analyzed the evolutionary history of brain and body mass, and relative brain size measured by the encephalization quotient (EQ), using a data set of extinct and extant taxa to capture temporal variation in the mode and direction of evolution. Our results suggest that cetacean brain and body mass evolved under strong directional …
The Fine-Scale Habitat Use Of Risso’S Dolphins Off Bardsey Island, Cardigan Bay (Uk), Marijke N. De Boer, Sonja Eisfeld, Mark P. Simmonds
The Fine-Scale Habitat Use Of Risso’S Dolphins Off Bardsey Island, Cardigan Bay (Uk), Marijke N. De Boer, Sonja Eisfeld, Mark P. Simmonds
Mark P. Simmonds, OBE
The main objectives of this study were (1) to estimate the population size of Risso’s dolphins off Bardsey Island using mark-recapture techniques (De Boer et al., 2013); and (2) to study habitat-use in relation to fine-scale oceanographic features. This work provides preliminary information on the habitat-use of Risso’s dolphins and will benefit future studies, along with the development of effective conservation measures for this species throughout the region.
Marine Noise Pollution - Increasing Recognition But Need For More Practical Action, Mark P. Simmonds, Sarah J. Dolman, Michael Jasny, E. C. M. Parsons, Lindy Weilgart, Andrew J. Wright, Russell Leaper
Marine Noise Pollution - Increasing Recognition But Need For More Practical Action, Mark P. Simmonds, Sarah J. Dolman, Michael Jasny, E. C. M. Parsons, Lindy Weilgart, Andrew J. Wright, Russell Leaper
Mark P. Simmonds, OBE
Over the last two decades, marine noise pollution has become increasingly recognized as an issue of major significance. The issue has become a primary focus of marine mammal research, but is also of concern to the public and policy makers. The result has been efforts involving a variety of disciplines, and relevant legislation and associated guidance are now in place in many parts of the world. Most current mitigation efforts are directed at reducing the risk of injury from exposure to intense noise, although the effectiveness of such mitigation measures in terms of risk reduction has rarely been quantified. Longer-term …
Cetaceans And Marine Debris: The Great Unknown, Mark Peter Simmonds
Cetaceans And Marine Debris: The Great Unknown, Mark Peter Simmonds
Mark P. Simmonds, OBE
Plastics and other marine debris have been found in the gastrointestinal tracts of cetaceans, including instances where large quantities of material have been found that are likely to cause impairment to digestive processes and other examples, where other morbidity and even death have resulted. In some instances, debris may have been ingested as a result of the stranding process and, in others, it may have been ingested when feeding. Those species that are suction or “ram” feeders may be most at risk. There is also evidence of entanglement of cetaceans in marine debris. However, it is usually difficult to distinguish …
Marine Noise Pollution - Increasing Recognition But Need For More Practical Action, Mark P. Simmonds, Sarah J. Dolman, Michael Jasny, E. C. M. Parsons, Lindy Weilgart, Andrew J. Wright, Russell Leaper
Marine Noise Pollution - Increasing Recognition But Need For More Practical Action, Mark P. Simmonds, Sarah J. Dolman, Michael Jasny, E. C. M. Parsons, Lindy Weilgart, Andrew J. Wright, Russell Leaper
Ecology Collection
Over the last two decades, marine noise pollution has become increasingly recognized as an issue of major significance. The issue has become a primary focus of marine mammal research, but is also of concern to the public and policy makers. The result has been efforts involving a variety of disciplines, and relevant legislation and associated guidance are now in place in many parts of the world. Most current mitigation efforts are directed at reducing the risk of injury from exposure to intense noise, although the effectiveness of such mitigation measures in terms of risk reduction has rarely been quantified. Longer-term …
Cetaceans And Marine Debris: The Great Unknown, Mark Peter Simmonds
Cetaceans And Marine Debris: The Great Unknown, Mark Peter Simmonds
Ecology Collection
Plastics and other marine debris have been found in the gastrointestinal tracts of cetaceans, including instances where large quantities of material have been found that are likely to cause impairment to digestive processes and other examples, where other morbidity and even death have resulted. In some instances, debris may have been ingested as a result of the stranding process and, in others, it may have been ingested when feeding. Those species that are suction or “ram” feeders may be most at risk. There is also evidence of entanglement of cetaceans in marine debris. However, it is usually difficult to distinguish …
The Fine-Scale Habitat Use Of Risso’S Dolphins Off Bardsey Island, Cardigan Bay (Uk), Marijke N. De Boer, Sonja Eisfeld, Mark P. Simmonds
The Fine-Scale Habitat Use Of Risso’S Dolphins Off Bardsey Island, Cardigan Bay (Uk), Marijke N. De Boer, Sonja Eisfeld, Mark P. Simmonds
Ecology Collection
The main objectives of this study were (1) to estimate the population size of Risso’s dolphins off Bardsey Island using mark-recapture techniques (De Boer et al., 2013); and (2) to study habitat-use in relation to fine-scale oceanographic features. This work provides preliminary information on the habitat-use of Risso’s dolphins and will benefit future studies, along with the development of effective conservation measures for this species throughout the region.
Cortical Complexity In Cetacean Brains, Patrick R. Hof, Rebecca Chanis, Lori Marino
Cortical Complexity In Cetacean Brains, Patrick R. Hof, Rebecca Chanis, Lori Marino
Veterinary Science and Medicine Collection
Cetaceans (dolphins, whales, and porpoises) have a long, dramatically divergent evolutionary history compared with terrestrial mammals. Throughout their 55–60 million years of evolution, cetaceans acquired a compelling set of characteristics that include echolocation ability (in odontocetes), complex auditory and communicative capacities, and complex social organization. Moreover, although cetaceans have not shared a common ancestor with primates for over 90 million years, they possess a set of cognitive attributes that are strikingly convergent with those of many primates, including great apes and humans. In contrast, cetaceans have evolved a highly unusual combination of neurobiological features different from that of primates. As …
A Comparison Of Encephalization Between Odontocete Cetaceans And Anthropoid Primates, L. Marino
A Comparison Of Encephalization Between Odontocete Cetaceans And Anthropoid Primates, L. Marino
Veterinary Science and Medicine Collection
There have been very few studies of brain size and encephalization in cetaceans and essentially none that have made direct quantitative comparisons of cetaceans and another mammalian group using large normative samples. In the present study two different measures of encephalization were calculated and used to rank and compare 21 odontocete species and 60 anthropoid primate species. Comparisons were made both within and between the two groups. Results show that the encephalization level of Homo sapiens is still extraordinary relative to that of nonhuman species. Nevertheless, a subset of delphinid odontocetes are significantly more highly encephalized than the most highly …