Consulta: subjectFacets:"Non-invasive methods"
Registros recuperados: 3
Data/hora: 16/06/2024 01:32:19

Automatic grape bunch detection in vineyards based on affordable 3D phenotyping using a consumer webcam.
Provedor de dados: 119
Autores: SANTOS, T. T.; BASSOI, L. H.; OLDONI, H.; MARTINS, R. L.
This work presents a methodology for 3-D phenotyping of vineyards based on images captured by a low cost high-definition webcamera. A novel software application integrated visual odometry and multiple-view stereo components to create dense and accurate three-dimensional points clouds for vines, properly transformed to millimeter scale. Geometrical and color features of the points were employed by a classification procedure that reached 93% of accuracy on detecting points belonging to grapes. Individual bunches were automatically delimited and their volumes estimated. The sum of the estimated volumes per vine presented a coefficient of correlation of R = 0.99 to the real grape weight observed in each vine after harvesting.
Tipo: Anais e Proceedings de eventos
Palavras-chave: Estimativa de podução; Métodos não-invasivos; Fenotipagem 3D; Visão estéro múltipla; Simultaneous localization and mapping; Yield estimation; Non-invasive methods; 3-D phenotyping; Multiple view stereo; Videira.; Viticultura.; Viticulture; Phenotype.
Ano: 2017
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083291

Non-invasive hair sampling of Neotropical otters
Provedor de dados: 49
Autores: Pedroso,Nuno M.; Dias,Sofia V.; Diniz-Reis,Thais Rovere; Santos-Reis,Margarida; Verdade,Luciano Martins.
Abstract: Sampling wild animal populations using non-invasive techniques is advised when dealing with threatened species. Hair samples provide ecological information like species and individual identification. However, hair trapping is scarcely used in otters, due to their aquatic habits. Most studies are with captive individuals, so there is the need to test non-invasive hair trapping methods in otters in the wild. The aim of this study was to develop a simple and cost-effective method to collect hair from otter species in a non-invasive way. The study was carried out in the Paranapanema River, São Paulo State, Brazil, with the Neotropical otter (Lontra longicaudis Olfers, 1818), a protected species. Hair traps (wooden sticks and tree roots with adhesive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hair trap; Lontra longicaudis; Non-invasive methods; Brazil.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400209

Genetic diversity of the pampas deer (Ozotoceros bezoarticus) population in the Brazilian Pantanal assessed by combining fresh fecal DNA analysis and a set of heterologous microsatellite loci
Provedor de dados: 74
Autores: Mantellatto,Aline Meira Bonfim; Caparroz,Renato; Christofoletti,Maurício Durante; Piovezan,Ubiratan; Duarte,José Maurício Barbanti.
Abstract The pampas deer (Ozotoceros bezoarticus) is close to being classified as ‘globally threatened’, with the largest population occurring in the Brazilian Pantanal. Since capture is stressful to these animals, non-invasive sampling methods such as the use of feces can provide reliable sources of DNA. The aim of this study was to use fecal samples to evaluate the genetic variability of the Brazilian Pantanal population of pampas deer. Six heterologous microsatellite markers were used to screen 142 stool specimens. Seventy-four deer were identified, of which 50 adults were used to determine the genetic characteristics of the population. The Pantanal population showed high genetic diversity (mean number of alleles per locus = 11.5, expected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Fecal DNA; Microsatellites; Non-invasive methods; Pampas deer.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000500774