Sperm whales family

Ecological Modelling, , 71— Stock Status. The females cooperate to protect and nurse their young. Plastic pollution when ingested will block the digestive tract and many animals killed in this way appear emaciated with poor body condition. Schrey, A. Japan has taken up to 10 sperm whales per year since as part of their scientific research program, while two villages in Indonesia continue to engage in subsistence whaling and take a similar number for consumption Taylor et al. Male sperm whale Physeter macrocephalus acoustics in a high-latitude habitat: Implications for echolocation and communication.

Odontoceti are generally capable of echolocation. Allometric analysis indicates that mammalian brain size scales at approximately two-thirds or three-quarter exponent of the body mass. While knowledge of sleep in wild cetaceans is limited, toothed cetaceans in captivity have been recorded to exhibit unihemispheric slow-wave sleep USWS , which means they sleep with one side of their brain at a time, so that they may swim, breathe consciously and avoid both predators and social contact during their period of rest. Though a widely practised art in the 19th century, scrimshaw using genuine sperm whale ivory declined substantially after the retirement of the whaling fleets in the s. Despite the controversy thousands of dolphins are caught in drive hunts each year. The total number of sperm whales in the world is unknown, but is thought to be in the hundreds of thousands. This is filled with air sacs and fat that aid in buoyancy and biosonar.

Encyclopedia of Marine Mammals. It is a member of the unranked clade Cetacea , with all the whales, dolphins, and porpoises, and further classified into Odontoceti , containing all the toothed whales and dolphins. A coda is a short pattern of 3 to 20 clicks that is used in social situations. They are members of the Odontoceti , the suborder containing all the toothed whales and dolphins.