Null Hypothesis | Whale Games Cause Worry.
Whale Dissection. Science: Biology: Flora and Fauna: Animalia: Chordata: Mammalia: Cetacea: Odontoceti: Monodontidae. Porpoises. World Cetacea Database - Intro. The World Cetacea Database The Cetacea (whales, dolphins and porpoises) currently include 92 species that inhabit the world's oceans, lakes and rivers. Some are cosmopolitan, occurring in marine waters from pole to pole, while others are restricted by ecology and population status to small ranges of a few thousand square kilometers or less. Some are exclusively marine, others are freshwater, and some are both. The cetaceans arose deep in the artiodactyls (even-toed ungulates: cattle, sheep, antelopes, camels, pigs, etc.); their closest living relatives are the hippos.
Taxonomic coverage of the database is limited to the living species, although one of them, the baiji or Yangtze river dolphin is possibly now extinct. Please inform the editor, William Perrin of any omissions, typos, or errors you encounter. Citation Please cite the usage of the World Cetacea Database if you utilize taxonomic information in your publications. Perrin, W.F. (2014) World Cetacea Database. Image credits.
Cetacean Acoustics. Cetacean Mythology. Right Whale. River Dolphin Species. Harbour porpoise. Baleen whale. Mammalogy Image Archives: Cetacea. Cetacea - BiologyBase. Right Whales. Ocean Planet:How Deep. Whale fall. A whale fall is the carcass of a cetacean that has fallen into the Bathyal or Abyssal zone on the ocean floor.[2] As they are found at depths of 2,000 m or 6,600 ft, they create complex localized ecosystems that supply sustenance to deep-sea organisms for decades.[3] This is unlike in shallower waters, where a whale carcass will be consumed by scavengers over a relatively short period of time. It was with the development of deep-sea robotic exploration that whale falls were first observed in the late 1970s.[4] Organisms that have been observed at deep-sea whale falls include giant isopods, squat lobsters, bristleworms, prawns, shrimp, lobsters, hagfish, Osedax, crabs, sea cucumbers, and sleeper sharks.
Discovery[edit] Skeleton of a 35-ton, 13-m gray whale that has been on the seafloor of the Santa Cruz Basin (around 1700 m deep) for 18 months. Animals visible include swimming, eel-like hagfish, and thousands of amphipods and newly settled, juvenile clams.[1] WikiMiniAtlas Organisms[edit]
Home | Oregon State University Marine Mammal Institute. Seeing the sounds of the sea - Image 1. 12:07 01 February 2010 The songs of whales and dolphins can be beautiful to the ear. Now acoustics engineer Mark Fischer has created a way to make them visually pleasing too. What's more, his technique captures more information about the sound than traditional ways of visualising whalesong.
Image 1 of 10 Humpback whale call This is Fischer's representation of the low-frequency moans and cries of a humpback whale's mating song, with the time axis running anticlockwise. The sound for this graph was recorded in Hawaii. Audio: listen to the humpback whale's mating song (Image: Science Photo Library/AguaSonic Acoustics) A whale is fine too.
Dolphins: Second-Smartest Animals? - New research suggests that dolphins are second only to humans in smarts. - MRI scans indicate that these marine mammals are self-aware. - Researchers think dolphins are especially vulnerable to suffering and trauma. When human measures for intelligence are applied to other species, dolphins come in just behind humans in brainpower, according to new research. Dolphins demonstrate skills and awareness previously thought to be present only in humans. New MRI scans show that dolphin brains are four to five times larger for their body size when compared to another animal of similar size, according to Lori Marino, a senior lecturer in neuroscience and behavioral biology at Emory University, and one of the world's leading dolphin experts. Humans also possess an impressive brain-to-body ratio. Marino will be presenting her findings at next month's American Association for the Advancement of Science meeting.
Dolphins - Living Loose in the Ocean. Vengeful Whales - Askmen.com.
Eye to eye with the world’s largest animals. WSPA is working with Norwegian animal welfare groups and photographer Bryant Austin to premiere an exhibition of stunning life-sized whale images in Oslo. Opening tonight, the Eye to Eye exhibition offers visitors a unique view of these usually elusive and enigmatic creatures, accompanied by the sounds of whale calls. The huge photos – shown at a fraction of the size here – focus on the eyes of humpback, sperm and minke whales, providing a way for visitors to relate to them as fellow mammals. This is an exciting and relevant view to offer in Norway, where the government continues to award an annual whaling quota of 885 minke whales despite an international ban on commercial hunts.
Veterinarian and marine mammal coordinator for Dyrebeskyttelsen Norge, Tanya Schumacher, said: “We hope and believe that meeting the whales ‘eye to eye’ will create a new understanding and respect for these animals.” Seeing the big picture Facing up to cruelty Going eye to eye … Exhibition details. Rearranging the whale family tree : Laelaps. The big news in this week’s issue of Nature was the discovery of a small ornithischian dinosaur covered in bristles, but there was another, shorter paper that caught my eye. In December 2007 Nature printed a short communication on Indohyus, a small artiodactyl that seemed like a good candidate for the type of creature that whales evolved from. Paleontologists Hans Thewissen and Lisa Noelle Cooper explain the significance of Indohyus to whale evolution in this video; There was something that bothered me about the systematic analysis of Indohyus, however. In the paper’s phylogenetic tree raoellids (the group to which Indohyus belongs) and cetaceans were grouped together as sister groups, themselves forming a clade distinct from all other artiodactyls.
The results of the initial phylogenetic analysis of Indohyus from 2007. The new phylogenetic tree by Geisler and Theodor. So what do Thewissen and colleagues think of this? So there you have it. Whale Evolution. Just a mariachi band serenading a beluga whale.