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      Mammals of the Cosigüina Peninsula of Nicaragua

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          Abstract

          Nicaragua's Cosigüina Peninsula, located at the northwestern tip of the country, is one of the most poorly studied biotic regions in Central America. The peninsula has been occupied for millennia because the climate of the region supported human habitation and because of its strategic position along the rich Pacific coast. The combination of long-term occupancy by humans and the cataclysmic eruptions of Volcán Cosigüina have produced a heavily impacted landscape. During the 1960s, the University of Kansas conducted multiyear field surveys of the terrestrial mammals on the peninsula and the adjacent mainland to quantify species diversity, relationships, abundances, habitat use, and reproduction. The mammalian fauna of the peninsula contains at least 39 species of terrestrial mammals, which includes 7 orders and 17 families. These include Didelphimorphia (2 species)-Didelphidae, 2; Chiroptera (22)-Emballonuridae, 2; Noctilionidae, 1; Mormoopidae, 1; Phyllostomidae, 12; Vespertilionidae, 3; Molossidae, 3; Carnivora (4)-Procyonidae, 1; Mustelidae, 1; Felidae, 2; Perissodactyla (1)-Tapiridae, 1; Artiodactyla (1)-Cervidae, 1; Rodentia (8)-Sciuridae, 1; Heteromyidae, 1; Muridae, 5; Dasyproctidae, 1; Lagomorpha (1)-Leporidae, 1. We provide new information on distributions, systematics, morphometrics, and natural history of the species of terrestrial mammals on the Cosigüina Peninsula , including a number of new records for the peninsula. We document that diversity and abundances of mammals can be substantial in a heavily impacted landscape. In comparison with five other mammalian faunas in Nicaragua , the Cosigüina fauna is most similar in size and diversity with those from elsewhere in the Pacific lowlands. The fauna from the Cordillera los Maribios, which is composed of the volcanic peaks along the eastern edge of the Pacific Lowlands, has the lowest number of species recorded for any of the six faunas with only 21 species recorded; however, this fauna may be under sampled or the unstable environments offered by these active volcanoes may not support a large or diverse mammalian fauna. The mammalian faunas from the remaining two physiographic regions of Nicaragua-Central Highlands and Atlantic Lowlands-have larger, more diverse faunas than that of the Cosigüina Peninsula and elsewhere in the Pacific lowlands. Three reserves in Nicaragua 's Sistema Nacional de Áreas Protegidas now protect more than one-fourth of the peninsula.

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          Homogenization of Freshwater Faunas

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            Life zone ecology

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              Homogenization of fish faunas across the United States.

              Fish faunas across the continental United States have become more similar through time because of widespread introductions of a group of cosmopolitan species intended to enhance food and sport fisheries. On average, pairs of states have 15.4 more species in common now than before European settlement of North America. The 89 pairs of states that formerly had no species in common now share an average of 25.2 species. Introductions have played a larger role than extirpations in homogenizing fish faunas. Western and New England states have received the most introductions, which is a reflection of the small number of native fishes in these areas considered desirable gamefish by settlers.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                mznt
                Mastozoología neotropical
                Mastozool. neotrop.
                Sociedad Argentina para el Estudio de los Mamíferos (SAREM) (Mendoza )
                1666-0536
                December 2005
                : 12
                : 2
                : 153-179
                Affiliations
                [1 ] University of Nebraska–Lincoln Mexico
                [2 ] University of Kansas USA
                Article
                S0327-93832005000200004
                b7d9c0e2-a9cb-4748-baf5-23eae4f3c0e9
                Product
                Product Information: website
                Categories
                ZOOLOGY

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