24 research outputs found
Compilação atualizada das espécies de morcegos (Chiroptera) para a AmazÎnia Brasileira
AN EFFICIENT TECHNIQUE FOR TWOâDIMENSIONAL SIMULATION OF VELOCITY OVERSHOOT EFFECTS IN Si AND GaAs DEVICES
Migratory behaviour of the Schreiber's bat: when, where and why do cave bats migrate in a Mediterranean region?
Reproductive biology and postnatal development in the tent-making bat Artibeus watsoni (Chiroptera: Phyllostomidae)
In this study we investigated the reproductive patterns and postnatal development in the tentâmaking bat Artibeus watsoni. We sampled two populations in the Golfito Wildlife Refuge and Corcovado National Park, southâwestern Costa Rica, from June 2003 to March 2005. Most females were pregnant during the months of January and June, and most were lactating in March and July, indicating that this species exhibits seasonal bimodal polyoestry, with the first parturition peak occurring in FebruaryâMarch and the second in JuneâJuly. Additionally, we observed a postpartum oestrus following the first parturition, but not after the second. Females entered oestrus again in NovemberâDecember and had a gestation period of c. 3âmonths. A femaleâbiased sex ratio of neonates was observed during the second parturition period, and young were born at 32 and 56% of their mothers' body mass and length of forearm, respectively. Adult proportions in length of forearm were attained faster than adult proportions in body mass, and sustained flight was only possible after 35âdays of age, when pups had achieved 100 and 80% of adult length of forearm and body mass proportions, respectively. Weaning and roosting independence occurred when young were c. 30â40âdays old, and young females appeared to remain close to their place of birth, at least for their first mating period, whereas adult males were never recaptured near their birth site. In addition, sexual maturity was reached in as little as 3âmonths in females born during the first parturition period, whereas females born during the second birth period in JuneâJuly seemed to reach maturity at 6âmonths of age. Our results show that A. watsoni belongs to the faster lane of the slowâfast continuum of lifeâhistory variation in bats, which may be attributed primarily to its roosting and feeding ecology.Idea Wild/[]//Estados UnidosConsejo Nacional de Ciencia y TecnologĂa/[]/Conacyt/MĂ©xicoMinisterio de Ciencia, TecnologĂa y Telecomunicaciones/[]/MICITT/Costa RicaAmerican Society of Mammalogists/[]/ASM/Estados UnidosCleveland Metroparks Zoo/[]//Estados UnidosBat Conservation International/[]/BCI/Estados UnidosConservation, Food and Health Foundation/[]//Estados UnidosBoston Universityâs Center/[]//Estados UnidosUniversidad de Costa Rica/[]/UCR/Costa RicaUCR::Sedes Regionales::Sede del Su
Primeiro registro de Myotis riparius Handley (Mammalia, Chiroptera, Vespertilionidae) no Estado do Rio de Janeiro, sudeste do Brasil
No presente trabalho, Ă© registrada a primeira ocorrĂȘncia do morcego vespertilionĂdeo MyotisripariusHandley, 1960 no Estado do Rio de Janeiro. Sete exemplares dessa espĂ©cie foram capturados com redes de espera ("mist nets") na Reserva BiolĂłgica do TinguĂĄ, uma ĂĄrea de Mata AtlĂąntica no MunicĂpio de Nova Iguaçu, Estado do Rio de Janeiro. Aspectos taxonĂŽmicos dessa espĂ©cie sĂŁo discutidos e medidas obtidas para os exemplares sĂŁo fornecidas.<br>In this paper, the first occurrence of the vespertilionid bat MyotisripariusHandley, 1960 in the Rio de Janeiro State, southeastern Brazil is reported. Seven specimens were caught with mist nets in the Reserva Biologica do TinguĂĄ, an Atlantic Forest area in the Nova Iguaçu County, Rio de Janeiro state. Taxonomic aspects of this species are discussed. Measurements obtained for the specimens are also provided
Estrutura de comunidade da quiropterofauna (Mammalia, Chiroptera) do Parque Estadual de Campinhos, ParanĂĄ, Brasil
Partição de recursos alimentares entre quatro espĂ©cies de morcegos frugĂvoros (Chiroptera, Phyllostomidae)
Dados ecolĂłgicos dos quirĂłpteros da Reserva Volta Velha, ItapoĂĄ, Santa Catarina, Brasil Ecological data of Chiroptera from Reserva Volta Velha, ItapoĂĄ, Santa Cantarina, Brazil
<abstract language="eng">A study on the ecology of Chiroptera was made at the Reserve of Volta Velha on the Northern coast of Santa Catarina. This study aimed at knowing the frequency of the individuals colleeted in each season, part of their feeding diet and their time of activity as well as their breeding activity. The investigation was carried out from March, 1990 to February, 1991 by means of periodical captures which ocurred during four days each month totalizing 144 hours of net use. One hundred and thirty-five individuals belonging to 15 different species were caught. Sturnira lilium (Geoffroy, 1810), Artibeus lituratus (Olfers, 1818) and Myotis nigricans (Schinz, 1821) were captured in the highest number throughout the seasons of the year. Fruit-eating bats confirm their feeding preference for Cecropiaceae, Solanaceae. Myrtaceae and Piperaceae. The births occurred mostly in seasons other than the dry. Around 1:15 hours after sunset was the time when the highest numher of individuals were collected in the nets