Small, smaller, smallest -- The plight of the vaquita
...marine mammals. It is somewhat surprising that the porpoises are limited to such a small area when there are no...his sad prospect be prevented" The small number of porpoises in the current population cannot be expected to withstand continuing incidental mortality. This need...How ancient whales lost their legs, got sleek and conquered the oceans
...hanges that could have caused whales, dolphins and porpoises to lose their hind limbs. More than 50 million years ago the ancestors of whales and dolphins were four-footed land animals, not unlike large dogs. They became the sleek swimmers we recognize today during the next 15 million years, losing their hind ...Whale bubble nets, saxophone sounds, ultrasonic laser
... does not occur in humans or other mammals besides porpoises and whales. Now, Sam Ridgway and colleagues at the School of Medicine, University of California and SPAWAR Systems Center in San Diego have imaged this traditionally inaccessible part of the brain using positron emission tomography (PET), a noninvasi...Leading scientists rank endangered dolphins, porpoises most in need of immediate action
...h without intervention. The list of dolphins and porpoises that could recover if changes to fishing methods a...ther conservation efforts are made includes harbor porpoises in the Black Sea, where thousands of porpoises are killed each year; Atlantic humpback dolphins off ...Royal Society study on adaptability of fish to warming oceans
... the Royal Society B: Biological Sciences Swimming porpoises acoustically inspect areas that lie ahead by Dr TA... Mr KW Wang and Dr YN Naito Free-ranging finless porpoises scan ahead in advance by using their sonar before swimming silently. The inspection distance reaches...Toxic flame retardant accumulates in dolphins
...y found the alpha isomer of HBCD in the blubber of porpoises and dolphins. Boon's team were Bart Zegers from th...Graham Pierce from the University of Aberdeen. The porpoises and dolphins investigated were stranded on the coasts of Scotland, Ireland, the Netherlands, Belgium...Scientists find missing link between whale and its closest relative, the hippo
...h whales," said Boisserie. "But cetaceans whales, porpoises and dolphins don't look anything like hippos. There is a 40-million-year gap between fossils of early cetaceans and early hippos." In a paper appearing this week in the Online Early Edition of the Proceedings of the National Academy of Sciences, Boi...Baby songbirds and human infants learn sounds in similar ways
... only humans, some kinds of birds and perhaps some porpoises and whales learn the sounds they use to communicate with each other through a process of listening, imitation and practice. For the rest, including nonhuman primates, these sounds develop normally in the absence of external models. Now Rockefeller U......The others are the cetaceans whales, dolphins and porpoises and perhaps bats.) The Bird Song Experiments The researchers first recorded songs from white-crowned sparrows in Utah's Wasatch Range. They digitized the recordings so they could break them into five segments or snippets they called "phrases." ...