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Their intestinal tract is highly adapted to absorb the most nutrients from food; the walls are folded and contain copious blood vessels, allowing for a greater surface area over which digested food and water can be absorbed. Baleen whales get the water they need from their food; however, the salt content of most of their prey (invertebrates) is ...
A study of the Southern Ocean found that whales not only recycled iron concentrations vital for phytoplankton, but also formed, along with krill, a major source of sequestered iron in the ocean, up to 24% of the iron held in the surface waters of Southern Ocean. Whales formed part of a positive feedback loop and if whale populations are allowed ...
The whale then pushes the water out, and animals such as krill are filtered by the baleen and remain as a food source for the whale. Baleen is similar to bristles and consists of keratin, the same substance found in human fingernails, skin and hair. Baleen is a skin derivative. Some whales, such as the bowhead whale, have
In the drone video, they observed that younger, smaller whales often swam sideways or facing forward, opening and closing their mouths to find and take in food. Older, bigger whales, meanwhile ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 January 2025. Large baleen whale species Humpback whale Temporal range: 7.2–0 Ma Pre๊ ๊ O S D C P T J K Pg N Late Miocene – Recent Size compared to an average human Conservation status Least Concern (IUCN 3.1) CITES Appendix I (CITES) Scientific classification Domain: Eukaryota Kingdom ...
Gray whales feed benthically, by diving to the ocean floor and rolling on to their side, (like blue whales, gray whales seem to favor rolling onto their right side) and suck up prey from the sea floor. [98] Gray whales seem to favor feeding planktonically in their feeding grounds, but benthically along their migration route in shallower water. [99]
Whales are vulnerable to entanglement in fishing gear and collisions with large ships, and scientists have said both threats are made more severe by warming waters because ocean changes cause ...
In the Southern Ocean, blue whales produce 18-second vocals which start with a 9-second-long, 27 Hz tone, and then a 1-second downsweep to 19 Hz, followed by a downsweep further to 18 Hz. [107] [108] Other vocalizations include 1–4 second long, frequency-modulated calls with a frequency of 80 and 38 Hz. [108] [109]