By Hans Kruuk
Otters are hugely charismatic and well known animals of very huge crisis to conservationists around the world. Written through the pre-eminent authority within the box, this booklet builds at the acceptance of the author's landmark monograph of the ecu otter, Wild Otters (OUP, 1995). additionally, its broader scope to incorporate all species of otter in North the United States in addition to Europe and in different places results in a deeper synthesis that drastically expands the book's total relevance and capability readership.Aimed at naturalists, scientists and conservationists, its own sort and generously illustrated textual content will attract amateurs and pros alike. It emphasizes fresh examine and conservation administration tasks for all thirteen species of otter around the world, comprises contemporary molecular study on taxonomy and inhabitants genetics, and discusses the broader implications of otter stories for ecology and conservation biology.As good as mesmerizing direct observations of the animals, there's tips approximately how and the place to observe and learn them. From otters within the British and American lakes and rivers, to sea otters within the Pacific Ocean, big otters within the Amazon and different species in Africa and Asia, this booklet presents an interesting method of their interesting lifestyles, to the technological know-how had to realize it, and to the very actual threats to their survival.
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Additional resources for Otters: Ecology, Behaviour and Conservation (Oxford Biology)
Once caught, a prey is held either in the mouth or in the forepaws, and, when eating, the long-ﬁngered forepaws are used almost like the hands of primates; for instance, an otter ﬂoating in the water and eating a crab guides the food with its hands. Larger prey are taken ashore. There is no evidence of cooperative prey-catching by the Cape clawless, although it is by no means a totally solitary species. These animals often forage on their own, but one sees groups of up to eight, family parties of mother and (even adultsized) cubs, or gangs of males only.
The conclusion is based on fairly accurate knowledge of the speed of changes within one particular gene, cytochrome b. e. the beginning of their evolution) somewhat earlier than fossil and other evidence had suggested (Bininda-Emonds et al. 1999; Willemsen 1992), which perhaps is not surprising, as the chance of ﬁnding fossils of the earliest animals is small. The two main branches on the otter tree are Lutra (Eurasian) and Lontra (American), and however similar they may look in the ﬁeld, Koepﬂi and Wayne (1998) argued that they are genetically sufﬁciently dissimilar to warrant these different generic names.
21 Geographical range of the small-clawed otter: inland and coastal south-east Asia, with a small population in southern India. 20 Small-clawed otter, a very gregarious species. © Nicole Duplaix. Pen pictures. Thirteen otters of the world: some natural history 23 large groups of up to ﬁfteen otters—the average group size is about ﬁve. Just like the smooth otter, it often rears up on its haunches to look around, probably to detect possible predators. ) and other invertebrates, each individual otter working on its own.