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Registros recuperados: 8
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Bioeconomic Modeling of the Invasive Aquatic Plants Hydrilla verticillata (hydrilla), Eichhornia crassipes (water hyacinth), and Pistia stratiotes (water lettuce) and their impacts on angler effort on Florida lakes AgEcon
Adams, Damian C.; Lee, Donna J..
The invasive aquatic plants Hydrilla verticillata (hydrilla), Eichhornia crassipes (water hyacinth), and Pistia stratiotes (water lettuce) have the potential to negatively impact recreational use of Florida lakes if consistent, adequate control expenditures are not made. In the mid-1990's, Florida significantly reduced its spending on invasive aquatic plant control measures, which resulted in a significant increase in needed control expenditures in subsequent years. This paper attempts to formalize a relationship between coverage of these invasive aquatic plants and angler effort on Florida lakes using data on 38 lakes over 20 years. Estimated regression coefficients are used to simulate control alternatives, and expenditure cost-benefit comparisons are...
Tipo: Conference Paper or Presentation Palavras-chave: Hydrilla; Water hyacinth; Water lettuce; Bioeconomic; Invasive; Control; Resource /Energy Economics and Policy.
Ano: 2005 URL: http://purl.umn.edu/19146
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Economics of controlling invasive species: a stochastic optimisation model for a spatial-dynamic process AgEcon
Chalak, Morteza; Pannell, David J.; Polyakov, Maksym.
Invasive species are significant threats to biodiversity, natural ecosystems and agriculture leading to large worldwide economic and environmental damage. Spread and control of invasive species are stochastic processes with important spatial dimensions. Most economic studies of invasive species control ignore spatial and stochastic aspects. This paper covers this gap in the previous studies by analysing a spatially explicit dynamic process of controlling invasive species in a stochastic setting. We show how stochasticity, spatial location of infestation and control can influence the spread, control efficiency and optimal control strategies. The main aim of this paper is to analyse the relationship between economic parameters and stochastic spatial...
Tipo: Conference Paper or Presentation Palavras-chave: Spatial; Dynamics; Invasive; Economics; Stochastic; Optimisation; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/103325
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Crescimento e acúmulo de nutrientes por plantas espontâneas e por leguminosas utilizadas para adubação verde. Repositório Alice
FAVERO, C.; JUCKSCH, I.; COSTA, L.M.; ALVARENGA, R. C.; NEVES, J.C.L..
As especies vegetais espontaneas, nas areas de cultivo agricola, tem sido tratadas como "plantas daninhas". "ervas invasoras", "incos" e outras denominacoes, do ponto de vista dos prejuizos que podem acarretar as especies cultivadas. No entanto, as espontaneas podem promover os mesmos efeitos de protecao do solo e ciclagem de nutrientes que especies cultivadas ou introduzidas para adubacao verde. O crescimento e o acumulo de nutrientes pela parte aerea de espontaneas e de leguminosas utilizadas como adubos verdes foram medidos em um experimento de campo em Sete Lagoas (MG), na Embrapa Milho e Sorgo. O experimento consistiu de cinco especies de leguminosas (feijao-de-porco, feijao bravo do Ceara, mucuna-preta, lab-lab e guandu), submetidos a duas condicoes...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Biomassa; Produtividade; Invasoras; Ciclagem de nutrientes; Biomass; Productivity; Nutrient cycling; Invasive.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/483576
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Nassarius foveolatus (Gastropoda, Nassariidae), a new record of an exotic species in Brazil Pap. Avulsos de Zool. (São Paulo)
Gernet,Marcos de Vasconcellos; Belz,Carlos Eduardo; Baggio,Rafael Antunes; Birckolz,Carlos João; Santos,Elizângela da Veiga; Simone,Luiz Ricardo L.; Abbate,Daniel; Metri,Rafael.
Abstract Exotic species are those that occur in an area beyond their natural limit and they are considered invasive when they cause harm to the economy, environment, or human health. In coastal environments, ballast water and inlays on the hull and other parts of vessels are the main ways of introducing invasive aquatic alien species. Nassarius foveolatus (Dunker, 1847) is native from the Central and East Indian Ocean to the East China Sea. The first specimens (empty shells) of N. foveolatus were collected manually on November 11, 2017 on the Rocio footbridge, located in the Paranaguá Estuarine Complex, on the coast of the State of Paraná, southern Brazil. Posteriorly, live specimens were collected in other localities of this bay. It is already possible to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Invasive; Exotic; Mollusca; Nassarius foveolatus; Paraná coast.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100255
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Occurrence of Bondar's Nesting Whitefly, Paraleyrodes bondari (Hemiptera: Aleyrodidae), on cassava in Uganda Rev. Bras. entomol.
Omongo,Christopher Abu; Namuddu,Annet; Okao-Okuja,Geofrey; Alicai,Titus; van Brunschot,Sharon; Ouvrard,David; Colvin,John.
ABSTRACT Cassava is a valued calorific source to millions of Africans who eat it daily and a vital staple for their food security. One of the key constraints to this crop is whiteflies which are both a vector of viral diseases and a direct pest. Although the African cassava whitefly is known to cause physical damage on cassava with considerable tuberous yield loss, a recent whitefly outbreak caused unusually severe damage, which prompted the current reported investigation. Molecular identification of whitefly adults sampled from the affected cassava field revealed the presence of a new whitefly species, Paraleyrodes bondari. This communication is the first report of the occurrence of P. bondari on cassava in Uganda.
Tipo: Info:eu-repo/semantics/other Palavras-chave: East Africa; Invasive; Manihot; New pest; Food security.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000400257
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Scanning the genome of the Pacific cupped oyster, Crassostrea gigas, for adaptative differentiation during geographic range expansion ArchiMer
Rohfritsch, Audrey; Bierne, Nicolas; Boudry, Pierre; Heurtebise, Serge; Lapegue, Sylvie.
Originating from the north eastern Asia, Crassostrea gigas has been introduced and translocated, mainly for aquaculture purpose, into several European countries (from Norway to Portugal and in the Mediterranean Sea) (1). Although highly variable, the invasiveness pattern of C. gigas has been demonstrated in several countries and therefore considered as a pest or a noxious species in those areas (2 and 3).Our project aims at identifying the characteristics of such a flourishing species: can its success be explained by chance and/or global warming only or does it exhibit a more important potential of adaptation than other species? Therefore we developed a population genomics approach, known as "genome scan". It corresponds to the study of numerous loci...
Tipo: Text Palavras-chave: Invasive; AFLP; Genome scan; Crassotrea gigas; Pacific oyster.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-4805.pdf
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Génomique de l'adaptation de l'huître creuse du Pacifique, Crassostrea gigas, dans le cadre de son expansion géographique ArchiMer
Rohfritsch, Audrey; Bierne, Nicolas; Boudry, Pierre; Heurtebise, Serge; Lapegue, Sylvie.
Originating from the north eastern Asia, Crassostrea gigas has been introduced and translocated, mainly for aquaculture purpose, into several European countries (from Norway to Portugal and in the Mediterranean Sea) (1). Although highly variable, the invasiveness pattern of C. gigas has been demonstrated in several countries and therefore considered as a pest or a noxious species in those areas (2 and 3). Our project aims at identifying the characteristics of such a flourishing species: can its success be explained by chance and/or global warming only or does it exhibit a more important potential of adaptation than other species? Therefore we developed a population genomics approach, known as "genome scan". It corresponds to the study of numerous loci...
Tipo: Text Palavras-chave: Pacific oyster; Invasive; AFLP; Genome scan; Crassostrea gigas.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-4542.pdf
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Biological Control of Giant Reed (Arundo donax): Economic Aspects AgEcon
Seawright, Emily K.; Rister, M. Edward; Lacewell, Ronald D.; Sturdivant, Allen W.; Goolsby, John A.; McCorkle, Dean A..
Arundo donax is a large, invasive weed consuming large quantities of water in the riparian area of the Texas Rio Grande Basin. With water availability a concern to the area, the USDA-ARS is investigating biological control agents to increase available water, creating a benefit to both the region’s economy and society in general.
Tipo: Conference Paper or Presentation Palavras-chave: Arundo donax; Giant Reed; Water; Economics; Invasive; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/46740
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