Navegando por Assunto "Habitat"
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- Biologia e modo de vida dos elasmobrânquios(2023-04) Gadig, Otto B. F.; Rosa, Ricardo S.; Kotas, Jorge E.; Santos, Roberta A.; Barreto, Rodrigo; Kotas, Jorge Eduardo; Vizuete, Eloisa Pinto; Santos, Roberta Aguiar dos; Baggio, Maya Ribeiro; Salge, Paula Guimarães; Barreto, Rodrigo
- O conhecimento sobre as populações de elasmobrânquios marinhos ameaçados de extinção(2023-04) Lessa, Rosângela; Rosa, Ricardo S.; Barreto, Rodrigo; Santana, Francisco M.; Nunes, Jorge; Lana, Fernanda Ol; Araújo, Maria Lúcia G.; Vianna, Marcelo; Gadig, Otto B. F.; Kotas, Jorge Eduardo; Vizuete, Eloisa Pinto; Santos, Roberta Aguiar dos; Baggio, Maya Ribeiro; Salge, Paula Guimarães; Barreto, Rodrigo
Item Habitat selection by Bothrops atrox (Serpentes: Viperidae) in central Amazonia, Brazil.(Bioone, 2019-03-28) de Fraga, Rafael; Magnusson, William E.; Abrahão, Carlos R.; Sanaiotti, Tania; Lima, Albertina P.Tropical rainforests often appear relatively homogeneous on satellite images, but responses to landscape characteristics may be found on finer scales if habitat characteristics are considered as continuous variables. In this study, we used 30 uniformly distributed plots and 16 plots beside streams to evaluate the effects of distance from stream, litter depth, altitude, slope, and tree density on abundance of Amazonian Lancehead Pitviper (Bothrops atrox). We estimated densities and probabilities of detection of snakes in riparian and upland plots in Reserva Ducke, Manaus, Amazonas,Brazil. Apparent density of individuals of B. atrox was about 6.4 times higher near streams, but the number of individuals in the landscape more than 10 m away from streams was about 3.9 times higher than the number of individuals within 10 m of streams. Movement data from two adult B. atrox evaluated by radio telemetry indicate that individuals can disperse out of plots and away from streams over a period of several months. Detectability of B. atrox varied little among riparian and upland plots, so differences in detectability are unlikely to be responsible for large differences in encounter rates of snakes between riparian and non-riparian areas. There were small differences in body size of individuals near streams and individuals far from streams. The distribution of B. atrox is not uniform within the forest. However, as with most other tropical-forest organisms studied to date, this species occurs across wide environmental gradients and shows only subtle habitat specificity.Item Mobility of bats between caves: ecological aspects and implications for conservation and environmental licensing activities in Brazil(2021-08-17) Leal, Edson Silva Barbosa; Bernard, EnricoBats are highly mobile animals, moving rapidly over long distances. Detecting such movements is challenging, especially in cave areas, a commonly-used roost by bats. Brazil has a large number of caves and bat species, but details on bat mobility among caves is still poorly documented there. Such monitoring provides insights on the structuring and conservation of cave-dwelling communities, with possible legal implications for the environmental licensing in Brazil. Based on marking (2,490 bats captured; 2,142 marked) and recapture (35 events; 14 extra-site), here we present data on the mobility of mormoopid bats between two bat caves 15 km apart in northeastern Brazil. Sexual segregation between caves may explain mobility: one cave is likely a maternity roost; the other is a satellite cave used for copulae. Nomadic behavior due to seasonal distribution of resources in the semi-arid Northeastern Brazil cannot be ruled out. Based on the distance between the two caves, bats could potentially forage over an area of ~170,000 hectares, in a wider use of the landscape. Our data have implications for the conservation of bat species and their roosts, and contribute to a more evidence-based discussion of key concepts governing the environmental licensing of mining activities in Brazil.Item New records of Uroderma magnirostrum Davis (Mammalia, Chiroptera) from southeastern Brazil, with comments on its natural history(Revista Brasileira de Zoologia, 2003) Nogueira, Marcelo R; Tavares, Valéria C; Peracchi, Adriano LúcioItem A new subterranean species of Phreatobius Goeldi, 1905 (Siluriformes, Incertae sedis) from the Southwestern Amazon basin(Papéis Avulsos de Zoologia, 2007) Shibatta, Oscar Akio; Cunha, Janice Muriel; Pinna, Mário C.C.Item Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil(Neotropical Ichthyology, 2015) Bichuette, Maria Elina; Trajano, EleonoraItem The rarest of the rare: rediscovery and status of the critically endangered Belem Curassow, Crax fasciolata pinima (Pelzeln, 1870)(Papéis Avulsos de Zoologia, 2018) Alteff, Eduardo França; Gonsioroski, Gustavo; Barreiros, Marcelo; Torres, Leonardo Gabriel C. de Oliveira; Camilo, André Restel; Mozerle, Hugo Borghezan; Sousa, Antônio Emanuel B. A. de; Medolago, César Augusto Bronzatto; Martínez, Carlos; Lima, Diego Mendes; Ubaid, Flávio Kulaif; Mendonça, Eloisa Neves; Tomotani, Barbara Mizumo; Silveira, Luís FábioThe Belem Curassow (Crax fasciolata pinima) is one of the most endangered birds in South America, without sight ings of birds in the wild for 40 years. This subspecies is nationally and internationally classified as critically endangered and close to extinction, suffering from poaching and deforestation in its range. Here we present new records of free-living individu als made on three indigenous lands in Pará and Maranhão states: in part of Terra Indígena Mãe Maria, Bom Jesus do Tocantins, Pará; in locations within the Reserva Biológica do Gurupi/Terra Indígena Alto Turiaçu, Centro Novo do Maranhão, Maranhão; and around the Terra Indígena Rio Pindaré, Alto Alegre do Pindaré, Maranhão. We also provide recommendations to protect this bird via a dedicated conservation program which includes finding new individuals in non-sampled areas (north of BR-222), es timating population size, enhancing taxonomic and natural history knowledge, capturing wild animals in order to start urgent ex situ conservation programs, and developing environmental awareness programs with the local and indigenous populations.