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Gray seals are gregarious animals—they gather in large groups on shore to breed, give birth, and molt. Female gray seals live up to 35 years and males about 25 years. Gray seals primarily hunt squid, fish, and sandeels; their main predators are humans, sharks, and orcas. Gray seal pups are born in autumn (September to November) in the eastern ...
Six years since it began, WHOI’s Ocean Twilight Zone project brings new and exciting insights to bear. The once-romanticized notion of an ice-free Arctic comes full circle. The abyssal zone, or the abyss, is the seafloor and water column from 3,000 to 6,500 meters (9,842 to 21,325 feet) depth, where sunlight doesn’t penetrate.
21 de ago. de 2008 · Sea Life Is Accumulating Pathogens. A wide range of marine animals also contains microbes that are resistant to antibiotics. An unprecedented survey of seabirds, marine mammals, and sharks on the U.S. East Coast has revealed that marine wildlife contains a wide variety of disease-causing microbes—including many that have developed resistance ...
20 de dic. de 2007 · A seal, sick or injured, is found stranded on a beach. What should be done? That depends on whom you ask. An animal welfare advocate would urge efforts to help the disabled animal. A scientist might want to rehabilitate it with another reason also in mind: to release and track it, and learn about wildlife populations.
3 de jul. de 2007 · The tags, invented in 1999 by Woods Hole Oceanographic Institution engineer Mark Johnson, are instruments that record the movements and sounds made by marine mammals, and the sounds around them in their inaccessible underwater environment. Johnson developed the tags to get a better sense of what whales were doing in the depths.
1 de may. de 2019 · A 3D model of gray seals, shown here, enables scientists to take body mass measurements of each animal (example outlined in green). (Photo by Michelle Shero, Woods Hole Oceanographic Institution) “The seals act as environmental sentinels – or a canary in the coal mine for our oceans,” said Shero, “Everything from nutrients to fish ...
female northern elephant seal. This animal was equipped with an ARGOS-only transmitter (SMRU SRDL). Although no GPS data were available for comparison, this track was chosen because the animal ventured into coastal waters of British Colombia (Canada), into a meander of fjords and islands. Elephant seals do not cross islands and do not haul-
1 de dic. de 2020 · Marine mammals are warm-blooded vertebrates (animals with a backbone) that bear live young and nourish them with milk as land mammals do, but that spend most or all of their lives in the ocean. They are broken into three groups that share similar adaptations to their aquatic life, but that have very different origins and life patterns.
Mollusks have an outermost layer of tissue on their bodies. Called the mantle, this layer connects the animal to its shell. The mantle also creates that shell. Specialized cells in the mantle build the shell using proteins and minerals. These are secreted—released into the space outside the cells.
animal’s behavior. The observation equation relates satellite observed locations to an animal’s true unob-served location. This is linked with a stochastic behavioral model, the transition equation, which pre-dicts where the animal will move next. We fit a two-state switching CRW model described in Jonsen et al. (2005) to the grey seal ...
