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Registros recuperados: 43
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Occupancy of different types of forest habitats by tyrant flycatchers (Passeriformes: Tyrannidae) Biota Neotropica
Rosa,Gabriel Lima Medina; Anjos,Luiz dos; Moura,Maurício Osvaldo.
The abundance distribution of the tyrant flycatchers (Tyrannidae family) was evaluated in three main forest habitats of Mata dos Godoy State Park (PEMG), north of the state of Paraná. We conducted point counts and from the collected data we calculated the Index of Point Abundance (I. P. A.) of each species in the habitats of interior of mature forest (FLI), slope forest (FLE) and reforestation (REF). Among the 22 recorded species, eight occurred in all habitats, while other eight occurred in two habitats and six were exclusive of one habitat. Among the 16 recorded species in more than one habitat, 10 were more abundant in only one. On the contrary to our expectation and despite the clear habitat segregation among species, the abundance distribution was not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Habitat; Foraging; Abundance; Distribution; Frugivory.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400190
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A comparison of foraging between the South American and Cabot's Tern in southern Brazil Biota Neotropica
Fracasso,Hélio Augusto Alves; Branco,Joaquim Olinto; Barbieri,Edison.
Despite being widely distributed in South America and having relatively large populations, little is known about the trophic ecology of the South American Tern (Sterna hirundinacea) and Cabot's Tern (Thalasseus acuflavidus). In Brazil, South American and Terns Cabot's breed in mixed colonies from the state of Espírito Santo to Santa Catarina. Here, we describe results of a study of the feeding ecology of these two species during the reproductive seasons of April to October of 2003, 2005 and 2006 from Cardos Island, Santa Catarina, Brazil. A total of 6248, 5140, and 4006 fishes were delivered to chicks or females by South American Terns; and 1157, 628 and 98 fish and or other prey items by Cabot's Terns during the breeding seasons of 2003, 2005, and 2006,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cabot's Terns; South American Terns; Feeding ecology; Prey; Foraging.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300016
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Effect of ascorbic acid on food preference and consumption in captive capybaras (Hydrochoerus hydrochaeris) BABT
Alvarez,Martín Roberto; Kravetz,Fernando Osvaldo.
The aim of this work was to study the short and long term influences of ascorbic acid on Hydrochoerus hydrochaeris, if supplemented in their food. No differences regarding food intake were observed in the absence of vitamin C. On a daily basis, animals accustomed to food containing ascorbic acid prefered to continue eating the same food. Food preference in capybaras did not seem to depend on ascorbic acid availability; however, when accustomed to vitamin C, capybaras might recognize and select ascorbic acid in subsequent food. Mechanisms allowing capybaras to "evaluate" the nutritional quality of their food are discussed, as well as the adaptive value of this behavior in free ranging populations.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitamin C; Hydrochoeridae; Ecophysiology; Foraging; Nutrition; Feeding.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300011
Registros recuperados: 43
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