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| Registros recuperados: 713 | |
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| CHIARELLO,A. G.. |
| A survey of mammals and birds was carried out in a semi-deciduous forest fragment of 150 ha located in a zone of intensive agriculture in Ribeirão Preto, State of São Paulo, south-eastern Brazil. Line transect sampling was used to census mammals and birds during six days, totalling 27.8 km of trails and 27.8 hours of observation. Twenty mammal species were confirmed in the area (except bats and small mammals), including rare or endangered species, such as the mountain lion (Puma concolor), the maned wolf (Chrysocyon brachyurus), and the ocelot (Leopardus pardalis). The brown capuchin monkey (Cebus apella) and the black-tufted-ear marmoset (Callithrix penicillata) were found frequently, suggesting high population density in the fragment. Regarding the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avifauna; Conservation; Fragmentation; Mammals; São Paulo. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200007 |
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| Tilahun, Mesfin; Mathijs, Erik; Muys, Bart; Vranken, Liesbet; Deckers, Jozef A.; Gebregziabher, Kidanemariam; Gebrehiwot, Kindeya; Bauer, Hans. |
| Frankincense from Boswellia papyrifera forest (BPF) is a traded non timber forest product (NTFP) used in pharmaceutical, food, cosmetic and chemical industries. However, the resource in northeastern Africa is under continuous degradation and requires conservation measures. Data from a discrete choice contingent valuation study are used to assess the factors influencing rural households’ willingness to pay (WTP) and willingness to contribute labor (WTCL) for BPF conservation in Ethiopia. The standard probit, bivariate probit and interval data models were used for modeling respondents’ WTP and WTCL. We found household income as the most important factor affecting WTP whereas number of household labor is the most important factor affecting WTCL. Mean lower... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Willingness to pay; Boswellia papyrifera; Conservation; Contingent valuation; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/116085 |
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| Carter, Neil H; National Socio-Environmental Synthesis Center; ncarter@sesync.org; Hull, Vanessa; Michigan State University; hullvane@msu.edu; McConnell, William J.; Michigan State University; mcconn64@msu.edu; Axinn, William; University of Michigan; baxinn@umich.edu; Ghimire, Dirgha; University of Michigan; nepdjg@umich.edu; Liu, Jianguo; Michigan State University; liuji@msu.edu. |
| Conserving wildlife while simultaneously meeting the resource needs of a growing human population is a major sustainability challenge. As such, using combined social and environmental perspectives to understand how people and wildlife are interlinked, together with the mechanisms that may weaken or strengthen those linkages, is of utmost importance. However, such integrated information is lacking. To help fill this information gap, we describe an integrated coupled human and natural systems (CHANS) approach for analyzing the patterns, causes, and consequences of changes in wildlife population and habitat, human population and land use, and their interactions. Using this approach, we synthesize research in two sites, Wolong Nature Reserve in China and... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Complex systems; Conservation; Endangered species; Interdisciplinary science; Wildlife science. |
| Ano: 2014 |
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| Castro,Pedro Luiz de; Ribeiro,Ricardo Pereira; Santos,Silvio Carlos Alves dos; Goes,Elenice Souza dos Reis; Souza,Felipe Pinheiro de; Poveda-Parra,Angela Rocio; Vargas,Lauro; Urrea-Rojas,Angela Maria; Lopera-Barrero,Nelson Mauricio. |
| ABSTRACT: Brycon orbignyanus, popularly known in Brazil as piracanjuba, is a fish with great economic value but whose natural population drastically decreased in number during the last years. In this context, genetic variability studies of natural stocks and in restocking programs are fundamental for the adoption of conservation measures. Current analysis verifies the cross-amplification of heterologous primers in B. orbignyanus. Fifty-two primers of the species Brycon opalinus, Brycon hilarii, Brycon insignis, Prochilodus sp., Piaractus mesopotamicus, Colossoma macropomum and Oreochromis niloticus were tested. Primers with the best reproducibility were applied to a sample of 20 individuals and the genetic parameters were calculated. Nine primers provided... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brycon orbignyanus; Conservation; Molecular markers; Heterologous primers. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001200402 |
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| Paiz,Leonardo M.; Baumgärtner,Lucas; Graça,Weferson J. da; Margarido,Vladimir P.; Pavanelli,Carla S.. |
| ABSTRACT We provide cytogenetic data for the threatened species Gymnogeophagus setequedas, and the first record of that species collected in the Iguaçu River, within the Iguaçu National Park’s area of environmental preservation, which is an unexpected occurrence for that species. We verified a diploid number of 2n = 48 chromosomes (4sm + 24st + 20a) and the presence of heterochromatin in centromeric and pericentromeric regions, which are conserved characters in the Geophagini. The multiple nucleolar organizer regions observed in G. setequedas are considered to be apomorphic characters in the Geophagini, whereas the simple 5S rDNA cistrons located interstitially on the long arm of subtelocentric chromosomes represent a plesiomorphic character. Because G.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromosomes; Conservation; Iguaçu River; Karyotype; Paraná River. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200211 |
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| Bergtold, Jason S.; Duffy, Patricia A.; Hite, Diane; Raper, Randy L.. |
| The inclusion of cover crops in cropping systems brings both direct and indirect costs and benefits. Farmers will adopt and continue to utilize cover crops in their production systems as long as the perceived benefit of using cover crops (e.g. increased yield, higher profits, and improved soil productivity) is positive. The perceived benefits, while partially based on actual changes, may be influenced by demographic, economic and management factors. The purpose of this paper is to examine the demographic and management factors affecting the perceived benefit, in terms of improved crop yield, of using winter annual cover crops. A tobit model is estimated using survey data of Alabama farmers examining cover crop use and management. The model examines the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Cover Crops; Conservation; Adoption Process; Tobit Model; Value of Information; Farmer; Crop Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/6424 |
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| Registros recuperados: 713 | |
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