Consulta: subjectFacets:"Direct counts"
Registros recuperados: 2
Data/hora: 10/06/2024 07:40:05

A comparison of three methods to estimate variations in the relative abundance of moutain vizcachas (Lagidium viscacia) in the High Andes ecosystems
Provedor de dados: Mastozoología Neotropical
Autores: Lucherini,Mauro; Reppucci,Juan I.; Luengos Vidal,Estela.
Mountain vizcachas are large rodents that constitute the main prey of the High Andes meso-carnivores. We compared the line transect pellet count, observation rate and photographic rate methods to estimate the relative abundance of Mountain vizcachas in the High Andes ecosystems. Although a more formal validation based on the comparison with true abundances is desirable, our results suggested that these simple and affordable indices are promising methods, especially if protocols and sampling efforts are carefully standardized. We recommend the use of photographic rates, which are likely to provide the most reliable estimates, especially where Mountain vizcachas are active at night.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Andean cat; Camera trapping; Direct counts; Fecal pellet counts; Rodents.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000100020

Seasonal variation in foraging group size of crab-eating foxes and hoary foxes in the Cerrado Biome, Central Brazil
Provedor de dados: Mastozoología Neotropical
Autores: Lemos,Frederico Gemesio; Facure,Kátia Gomes.
In regions with a pronounced dry season, such as the Cerrado Biome (Brazilian savannah), climate seasonality may affect food availability for canid species and, consequently, their foraging behavior. We investigated seasonal variation in foraging group size of crab-eating foxes (Cerdocyon thous) and hoary foxes (Lycalopex vetulus) in the Cerrado region for three consecutive years. Data were obtained by direct observations of foraging foxes during spotlight surveys. Both species were sighted foraging individually or in pairs with or without their juvenile offspring. However, crab-eating foxes foraged in pairs more frequently in the wet season and individually more frequently in the dry season whereas hoary foxes foraged mostly individually throughout the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crab-eating fox; Direct counts; Hoary fox; Reproduction; Social behavior.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832011000200006