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| Registros recuperados: 69 | |
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| Johnson, Fred; U.S. Fish and Wildlife Service; fred_a_johnson@fws.gov; Williams, Ken; ; byron_ken_williams@nbs.gov. |
| Waterfowl harvest management in North America, for all its success, historically has had several shortcomings, including a lack of well-defined objectives, a failure to account for uncertain management outcomes, and inefficient use of harvest regulations to understand the effects of management. To address these and other concerns, the U.S. Fish and Wildlife Service began implementation of adaptive harvest management in 1995. Harvest policies are now developed using a Markov decision process in which there is an explicit accounting for uncontrolled environmental variation, partial controllability of harvest, and structural uncertainty in waterfowl population dynamics. Current policies are passively adaptive, in the sense that any reduction in structural... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Adaptive management; Harvest; Hunting regulations; Markov decision process; Migratory birds; Optimization; Uncertainty; Waterfowl.. |
| Ano: 1999 |
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| Kolpasсhikov, Leonid; Extreme North Agricultural Research Institute; kolpak46@norcom.ru; Makhailov, Vladimir; St. Petersburg Institute for Informatics and Automation; mwwcari@gmail.com; Russell, Don E.; CARMA, Yukon College; drussell@yukoncollege.yk.ca. |
| The Taimyr wild reindeer herd, i.e., caribou (Rangifer tarandus), is one of the most important wildlife resources in the Russian Far North and may constitute the largest migratory Rangifer herd in the world. Over the last 60 years the herd has undergone a recovery from low numbers in the 1940s, reaching high densities by 1970 that concerned wildlife managers and domestic husbandry herds, with an 11.7% annual growth rate. At that time an aggressive commercial harvest of the herd was implemented, and organized wolf control was initiated with the goal of stabilizing herd numbers and injecting needed economic activity into the region. These actions dampened the rate of increase throughout the 1970s and 1980s to a 3.0% annual growth rate. From 1991, after the... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Harvest; Rangifer; Reindeer; Russia; Taimyr. |
| Ano: 2015 |
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| Ingram, Daniel J.; School of Life Sciences, University of Sussex; D.Ingram@sussex.ac.uk; Coad, Lauren; Environmental Change Institute, University of Oxford; United Nations Environment Programme World Conservation Monitoring Centre; lauren.coad@ouce.ox.ac.uk; Collen, Ben; Centre for Biodiversity & Environment Research, University College London; b.collen@ucl.ac.uk; Breuer, Thomas; Global Conservation Program, Wildlife Conservation Society; tbreuer@wcs.org; Fa, John E.; Division of Biology and Conservation Ecology, School of Science and the Environment, Manchester Metropolitan University; Center for International Forestry Research; jfa949@gmail.com; Gill, David J. C.; Fauna & Flora International; david.gill@fauna-flora.org; Maisels, Fiona; Global Conservation Program, Wildlife Conservation Society; African Forest Ecology Group, School of Natural Sciences, University of Stirling; fmaisels@wcs.org; Schleicher, Judith; Department of Geography, University of Cambridge; js525@cam.ac.uk; Stokes, Emma J.; Global Conservation Program, Wildlife Conservation Society; estokes@wcs.org; Taylor, Gemma; Centre for Biodiversity & Environment Research, University College London; Institute of Zoology, Zoological Society of London; gemma.taylor@ioz.ac.uk. |
| Unsustainable exploitation of wild animals is one of the greatest threats to biodiversity and to millions of people depending on wild meat for food and income. The international conservation and development community has committed to implementing plans for sustainable use of natural resources and has requested development of monitoring systems of bushmeat offtake and trade. Although offtake monitoring systems and indicators for marine species are more developed, information on harvesting terrestrial species is limited. Building on approaches developed to monitor exploitation of fisheries and population trends, we have proposed two novel indicators for harvested terrestrial species: the mean body mass indicator (MBMI) assessing whether hunters are relying... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Africa; Bushmeat; Exploitation; Harvest; Indicator. |
| Ano: 2015 |
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| Martins,Murilo B.; Ruiz,Daniel. |
| ABSTRACT Operational conditions of mechanized harvesting can affect the quality of harvested sugarcane. Therefore, the aim of this study was to assess the influence of the displacement speed and cutting height on the quality of the raw material during the mechanized harvest of sugarcane. Vegetable losses were accounted for in the field by manual collection of the fractions left after harvest. Vegetable and mineral impurities were determined at the processing stage in the laboratory. Both the displacement speed and cutting height did not affect vegetable losses. However, the increase in vegetal impurities occurred at higher displacement speeds, whereas lower cutting heights resulted in higher amounts of mineral impurities. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural mechanization; Harvest; Quality; Saccharum spp. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300352 |
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| GARCIA, T. B.; NASCIMENTO FILHO, F. J. do. |
| Informacoes sobre a producao de mudas de guarana e recomendacoes tecnicas de cultivo, tais como: producao de mudas, tratos culturais no viveiro, transporte das mudas, custo de producao de mudas de estacas enraizadas, plantio definitivo, preparo do solo, tratos culturais no plantio definitivo, floracao e frutificacao, colheita, secagem, beneficiamento, comercializacao, usos, composicao quimica, coeficiente tecnico para implantacao do guaranazal. |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Paullinia cupana var; Sorbilis; Cultivo; Brasil; Amazonas; Manaus; Cultivation; Management crop; Harvest; Processing; Análise Econômica; Colheita; Composição Química; Implantação de Cultura; Mercado; Processamento; Secagem; Semente; Chemical composition; Drying; Economics; Marketing; Plant establishment. |
| Ano: 1998 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/666583 |
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| Registros recuperados: 69 | |
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