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  2. 1 day ago · Therefore, neural-crest evolution might pre-date 1R V. This observation serves as a guiding theory for the field, to be tested further with other species and functional validations.

  3. 1 day ago · Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans ( whales, dolphins and porpoises ), pinnipeds ( seals, sea lions and walruses ), sirenians ( manatees and dugongs ), sea otters and polar bears. They are an informal group, unified only by their reliance on marine ...

  4. 3 days ago · Marine mammalogist who leads the nonprofit group Pacific Mammal Research. Academia Biology. Effects of emigration on home range and behavior of Atlantic spotted dolphins (Stenella frontalis) Animal Behaviour. When personality matters: personality and social structure in wild bottlenose dolphins, Tursiops truncatus. Marine biology.

  5. 20 hours ago · Background Marine mammals, which have evolved independently into three distinct lineages, share common physiological features that contribute to their adaptation to the marine environment. Objective To identify positively selected genes (PSGs) for adaptation to the marine environment using available genomic data from three taxonomic orders: cetaceans, pinnipeds, and sirenians. Methods Based on ...

  6. 2 days ago · Evolution. The evolutionary record of the genus Orcinus is scanty. The earliest fossil identified as a killer whale is O. citonensis from the Pliocene Epoch (5.3 million to 2.6 million years ago) in Italy. This small mammal was about 4 metres long (13.1 feet) and had 14 teeth—more like a typical dolphin.

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  7. 5 days ago · The Marine Mammal Commission is an independent, science-based oversight agency charged by the MMPA to address human impacts on marine mammals and their environments.

  8. 3 days ago · 1 INTRODUCTION. The Mediterranean Sea is one of the most highly impacted enclosed seas on Earth, being bounded by heavily populated coastlines. Local marine mammal populations are subject to a suite of threats that include, most notably, anthropogenic noise and other pollution, and poor fisheries management (Ramírez et al., 2018).

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