Whales, Dolphins, and Porpoises of the Western North Atlantic
Whales, Dolphins, and Porpoises of the Western North Atlantic

Whales, Dolphins, and Porpoises of the Western North Atlantic

Whales, Dolphins, and Porpoises of the Western North Atlantic - A Guide to Their IdentificationAll whales, dolphins,...
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SKU: gb-33527-ebook
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Author: Caldwell, David Keller,1928-
Format: eBook
Language: English
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Whales, Dolphins, and Porpoises of the Western North Atlantic

Whales, Dolphins, and Porpoises of the Western North Atlantic

CHF 12.31 CHF 6.15
Whales, Dolphins, and Porpoises of the Western North Atlantic

Whales, Dolphins, and Porpoises of the Western North Atlantic

CHF 12.31 CHF 6.15
Author: Caldwell, David Keller,1928-
Format: eBook
Language: English
Description

Whales, Dolphins, and Porpoises of the Western North Atlantic - A Guide to Their Identification

All whales, dolphins, and porpoises belong to an order or major scientific group called the Cetacea by scientists. They are all mammals (air-breathing animals which have hair in at least some stage of their development, maintain a constant body temperature, bear their young alive, and nurse them for a while) which have undergone extensive changes in body form (anatomy) and function (physiology) to cope with a life spent entirely in the water. The breathing aperture(s), called a blowhole or blowholes, has (have) migrated to the top of the head to facilitate breathing while swimming; the forward appendages have become flippers; the hind appendages have nearly disappeared, they remain only as small traces of bone deeply imbedded in the muscles. Propulsion is provided by fibrous, horizontally flattened tail flukes. Scientists recognize two suborders of living cetaceans: the whalebone whales, suborder Mysticeti, and the toothed whales, suborder Odontoceti. The two groups are separated in the following ways: BALEEN OR WHALEBONE WHALES. These animals are called whalebone whales because when fully formed instead of teeth they have up to 800 or more plates of baleen or whalebone depending from the roof of the mouth. They use these plates to strain their food, which consists of "krill" (primarily small crustaceans) and/or small schooling fish, by taking water into the mouth and forcing it out through the overlapping fringes of the baleen plates. Baleen whales are externally distinguishable from toothed whales by having paired blowholes. There are eight species of baleen whales in the western North Atlantic, ranging in size from the minke whale (just over 30 feet [about 9.1 m])[5] to the blue whale (85 feet [25.9 m]). ......Buy Now (To Read More)

Product details

Ebook Number: 33527
Author: Caldwell, David Keller
Release Date: Aug 25, 2010
Format: eBook
Language: English

Contributors

Contributor (Author): Leatherwood, Stephen, Winn, Howard Elliott, 1926-


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