Last edited by Grotaxe
Monday, July 13, 2020 | History

3 edition of River dolphins and the larger toothed whales found in the catalog.

River dolphins and the larger toothed whales

by Sam H. Ridgway

  • 20 Want to read
  • 16 Currently reading

Published by Academic Press in London, New York .
Written in English

    Subjects:
  • Beaked whales,
  • Sperm whale,
  • River dolphins,
  • Narwhal,
  • White whale

  • Edition Notes

    Includes bibliographical references and index.

    Statementedited by Sam H. Ridgway and Richard Harrison
    SeriesHandbook of marine mammals -- v. 4
    The Physical Object
    Paginationxix, 442 p. :
    Number of Pages442
    ID Numbers
    Open LibraryOL24778539M
    ISBN 100125885040
    OCLC/WorldCa26991470

    Larger whales typically come to the surface to breathe every 10 to 15 minutes, while the smaller toothed whales, such as dolphins breathe more often—several times a minute. When releasing a breath at the surface there is often spray that results from the warm air (along with some mucus) released into colder water, which condenses and forms a. The toothed whales comprise the suborder Odontoceti of the order Cetacea. This suborder includes 10 diverse families, 2 of which contain large numbers of species. There are at least 71 species in all, including the true dolphins, monodontids, river dolphins, porpoises, beaked whales, and sperm whales. These species occur in three primary Cited by: 2.

    Ocean dolphins. The ocean dolphin family is very large and diverse; it has 38 members. Dolphins range in size from the largest, such as the orca, pilot whale and false killer whale, to the smallest which include the New Zealand dolphin and tucuxi.. Other ocean dolphins include Risso’s, striped, spinner, spotted, common, dusky, hourglass, rough-toothed, white-beaked, Commerson’s and. Whales range in size from the metres ( ft) and kilograms ( lb) dwarf sperm whale to the metres (98 ft) and metric tons ( short tons) blue whale, which is the largest creature that has ever lived. The sperm whale is the largest toothed predator on : Mammalia.

    Dolphins range in size from the m ( ft) long and 50 kg ( lb) Maui's dolphin to the m (31 ft) and 10 t (11 short tons) killer whale. Several species exhibit sexual dimorphism, in that the males are larger than females. They have streamlined bodies and two limbs that are modified into : Mammalia. Whales, Dolphins, and Porpoises, edited by whale biologist Berta, explains the diet, conservation status, and a host of other details for each of the 89 species of cetacea. This guide is a fantastic resource for biologists and aquatic-mammal watchers alike.


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River dolphins and the larger toothed whales by Sam H. Ridgway Download PDF EPUB FB2

Perfect for use in the field as a practical guide to identification, these books provide an abundance of factual information and reference photographs. Volume 4, the latest volume in this outstanding series, covers the river dolphins and the larger toothed whales.

ISBN: OCLC Number: Description: xix, pages: illustrations ; 23 cm. Contents: Amazon River dolphins, Boto (Inia geoffrensis) (de Blainville, ) / Robin C. Best and Vera M.F. da Silva --Baiji (Liptes vexillifer) (Miller, ) / Chen Peixun --Franciscana (Pontoporia blainvillei) (Gervais and d'Orbigny, ) / Robert L.

Brownell, Jr. --Susu (Platanista. Handbook of Marine Mammals: River dolphins and the larger toothed whales. This series is an authoritative guide to the biology of marine mammals in their natural environment.

Perfect for use in the field as a practical guide to identification, these books provide an abundance of factual information and reference photographs.

The largest female Amazon river dolphins can range up to m ( ft) in length and weigh kg ( lb). The largest male dolphins can range up to m ( ft) in length and weigh 94 kg ( lb). They have unfused neck vertebrae, enabling them to turn their heads 90 degrees. Dolphins (toothed whales) MarineBio T Dolphins (toothed whales) Their large mouth, curved into a wide smile, houses up to small teeth.

They can vary in size from Inia geoffrensis (Amazon river dolphin, pink river dolphin, boto, boutu) Genus. Dolphin Taxonomy (source: wikipedia) •Parvorder Odontoceti, toothed whales • Family Platanistidae Ganges and Indus river dolphin, Platanista gangetica with two subspecies Ganges river dolphin (or Susu), Platanista gangetica gangetica Indus river dolphin (or Bhulan), Platanista gangetica minor • Family Iniidae Amazon river dolphin (or Boto), Inia geoffrensisFile Size: 3MB.

The diet of the Amazon river dolphin is the most diverse of the toothed whales. It consists of at least 53 different species of fish, grouped in 19 families. The prey size is between 5 and 80 centimetres ( and in), with an average of 20 centimetres ( in).Class: Mammalia.

Nearly 90% of cetacean species are toothed whales. Most toothed whales are small dolphins and porpoise, however there are a few large toothed whales such as the killer whale and the mighty sperm whale, which grows to 60 feet ( meters) in length.

Toothed whales are believed to be some of the most intelligent animals on earth. The extant-toothed whales have been divided into 4 broad groups consisting of 10 families: sperm whales (Physeteroidea–families Physeteridae and Kogiidae), beaked whales (family Ziphiidae), river dolphins (4 families, below), and ocean dolphins or delphinoids (Delphinoidea–families Monodontidae, Delphinidae, and Phocoenidae).

Among these four broad groups, the physeteroids Cited by: The Amazon river dolphin (Inia geoffrensis), also known as the boto, bufeo or pink river dolphin, is a species of toothed whale classified in the family subspecies are currently recognized: I.

geoffrensis (Amazon river dolphin), I. boliviensis (Bolivian river dolphin) and I. humboldtiana (Orinoco river dolphin). The three subspecies are distributed in the Amazon basin. Dolphins › Dolphins are small, toothed whales. In dark water, dolphins use sound to find their food and to work out where they are.

Dolphins › Beluga › The beluga is a white whale. It can make all sorts of sounds, including barks, chirps, grunts, squeaks, and moos. Beluga › Blue whale › The blue whale is the biggest animal on Earth.

River dolphins are members of the group, the toothed whales. Three lines of evidence were analysed, producing three cladograms (family trees) for all the toothed whales. The evidence to construct these cladograms came from the morphology (form and structure) of fossil toothed whales (I), the morphology of living toothed whales (II) and the molecular sequences from living toothed whales (III).

a Suggest. While whales are larger than dolphins, dolphins are large (and more talkative) than porpoises. Some toothed whales are freshwater animals; these include six species of river dolphins. River dolphins are freshwater mammals with long snouts and small eyes, which live.

For example, the largest toothed whale, the sperm whale, feeds on giant squid of over 12 meters in length which are found at great depths and do not occur in large numbers.

Sperm whales may travel individually or with only one or two other whales to facilitate finding enough food. Some whales release a ring of bubbles to corral their prey, and recent research suggests that bowhead whales may live for more than years. Whales, Dolphins, and Porpoises, edited by whale biologist Berta, explains the diet, conservation status, and a host of other details for each of the 89 species of cetacea.

This guide is a fantastic /5(21). Cetacean intelligence is the cognitive ability of the order Cetacea of mammals. This order includes whales, porpoises, and dolphins. 2 Brain structure. 3 Brain evolution. 4 Problem-solving ability. Pod characteristics.

Complex play. Cross-species cooperation. Creative behavior. Use of tools. 6 Communication. 7 Self-awareness. The toothed whales (systematic name Odontoceti) are a parvorder of cetaceans that includes dolphins, porpoises, and all other whales possessing teeth, such as the beaked whales and sperm : Mammalia.

The Amazon River Dolphin (Inia geoffrensis), also known as the Pink River Dolphin, is a species of toothed whale classified in the family Iniidae. Three subspecies are currently recognized: I. geoffrensis (Amazon river dolphin), I.

boliviensis (Bolivian river dolphin) and I. humboldtiana (Orinoco river dolphin) while position of Araguaian river dolphin (I. araguaiaensis) within the. SINE (short interspersed element) insertion analysis elucidates contentious aspects in the phylogeny of toothed whales and dolphins (Odontoceti), especially river dolphins.

Here, we characterize 25 informative SINEs inserted into unique genomic loci during evolution of odontocetes to construct a cladogram, and determine a total of kb per taxon of the flanking sequences of these Cited by: The toothed whales comprise the suborder Odontoceti of the order Cetacea.

This suborder includes 10 diverse extant families, 2 of which contain large numbers of species. There are at least 74 extant species in all, including the true dolphins, monodontids, river dolphins, porpoises, beaked whales, and sperm whales. These species occur in three Author: Sascha K.

Hooker. Ocean dolphins. The ocean dolphin family is very large and diverse; it has 38 members. The largest ocean dolphins are the orca, pilot whale and false killer smallest are the New Zealand dolphin and tucuxi.

Other ocean dolphins include Risso’s, striped, spinner, spotted, common, dusky, hourglass, rough-toothed, white-beaked, Commerson’s and bottlenose dolphins. Like all toothed whales, the Amazon river dolphin has a melon – an oil-filled sensory organ that appears as a bulge on the animal’s forehead.

The melon is used for echolocation, the process by which the dolphin uses sound to find its way around in the murky water.Hoyt’s latest book is not only a fascinating compilation of insightful stories and the latest data on whales, dolphins and porpoises but an impassioned argument supporting the need for international protection of at-risk populations and their increasingly damaged habitat.