Marine Mammals - Woods Hole Oceanographic Institution
2020年12月1日 · 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.
Manatees, aquatic mammals inhabiting Florida’s rivers and
2009年8月5日 · Manatees, aquatic mammals inhabiting Florida’s rivers and coastal waters, swim close to the surface and are frequently killed in collisions with boats. To address the problem, boat traffic in manatee-populated waters is being required to maintain very low speeds.
An Ancient Biosonar Sheds New Light on the Evolution of …
2013年4月3日 · Some thirty million years ago, Ganges river dolphins diverged from other toothed whales, making them one of the oldest species of aquatic mammals that use echolocation, or biosonar, to navigate and find food. This also makes them ideal subjects for scientists working to understand the evolution of echolocation among toothed…
Seal Facts - Woods Hole Oceanographic Institution
2024年4月11日 · Seals are pinnipeds, a group of animals with three separate families—phocidae (eared seals), otaridae (non-eared seals), and odobenidae (walruses)—that are the only mammals that feed in the water and breed on land.
The Spiral Secret to Mammal Hearing - Woods Hole …
2008年9月17日 · The research, published April 22, 2008, in the Proceedings of the National Academy of Sciences as the featured news item, could be extrapolated to improve understanding of hearing (and the impact of human-made noises) in animals whose auditory abilities remain unknown, such as tigers and polar bears, and even extinct mammals, such as land and ...
How marine mammal ears are different from ours
Marine mammals also need a streamlined head for fast and easy movement through water that external ears would impede. Instead, they have ear holes located right behind the eye. In bottlenosed dolphins, the ear hole is only 2-3 millimeters in diameter.
Marine Mammal Acoustics - Woods Hole Oceanographic Institution
Marine mammals "vocalize" in a variety of ways, each of them suited to a particular behavior or situation. Dolphins, for instance, exhibit two main types of vocalization: clicks (~80K) and whistles (~120K). The "clicks" are used in echolocation to find food. Each individual dolphin also has a series of whistles (like a Morse code) distinct from ...
How Do Marine Mammals Avoid the Bends? – Woods Hole …
2018年4月25日 · Deep-diving whales and other marine mammals can get the bends - the same painful and potentially life-threatening decompression sickness that strikes scuba divers who surface too quickly. A new study offers a hypothesis of how marine mammals generally avoid getting the bends and how they can succumb under stressful conditions.
web dynamics, and harm aquatic health. Both toxic and non-toxic blooms can cause a wide range of detrimental effects at the ecosystem level. Toxic HAB species can cause fish kills and illnesses in mammals and birds as toxins move up the food chain.20 Toxins can be harmful or lethal at many levels in aquatic food webs and can remain viable for
Aquaculture - Woods Hole Oceanographic Institution
2020年6月25日 · Aquaculture is the farming of aquatic animals or plants principally for food. It includes the breeding, rearing, and harvesting of fish, mollusks, crustaceans, and plants in fresh and saltwater environments.