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Medios de vida de las mujeres desconchadoras de ostión (Crassostrea virginica) del ejido Sinaloa primera sección, de Cárdenas, Tabasco. Colegio de Postgraduados
Pérez Brito, Evelyn.
Se utilizó el Marco de Medios de Vida para estudiar el medio en que se desenvuelven las mujeres desconchadoras de ostión. El trabajo de campo se realizó en el ejido Sinaloa primera sección, del municipio de Cárdenas, Tabasco. Se utilizaron métodos cualitativos para conocer el contexto de vulnerabilidad de las desconchadoras de ostión. Los principales elementos del contexto de vulnerabilidad detectados fueron: la apertura de Boca de panteones, los huracanes Opal y Roxana, las temporadas de veda de ostión y la posición de sumisión de las mujeres. Para conocer los activos o capitales de Medios de Vida se utilizaron métodos cualitativos y cuantitativos; se encontró que el activo financiero, físico y natural son los más afectados por las crisis económicas,...
Palavras-chave: Vulnerabilidad; Medios de vida; Desconchadoras de ostión; Activos; Subordinación; Vulnerability; Livelihoods; Shucked oyster; Assets; Subordination; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2011 URL: http://hdl.handle.net/10521/628
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Feeding behavior by hummingbirds (Aves: Trochilidae) in artificial food patches in an Atlantic Forest remnant in southeastern Brazil Rev. Bras. Zool.
Lanna,Lucas L.; Azevedo,Cristiano S. de; Claudino,Ricardo M.; Oliveira,Reisla; Antonini,Yasmine.
ABSTRACT During flight, hummingbirds achieve the maximum aerobic metabolism rates within vertebrates. To meet such demands, these birds have to take in as much energy as possible, using strategies such as selecting the best food resources and adopting behaviors that allow the greatest energy gains. We tested whether hummingbirds choose sources that have higher sugar concentrations, and investigated their behaviors near and at food resources. The study was conducted at Atlantic forest remnant in Brazil, between June and December 2012. Four patches were provided with artificial feeders, containing sucrose solutions at concentrations of 5%, 15%, 25% and 35% weight/volume. Hummingbird behaviors were recorded using the ad libitum method with continuous...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavioral strategies; Dominance; Food resources; Subordination; Trapline.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100305
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Certain Aspects of Univalent Function with Negative Coefficients Defined by Bessel Function BABT
Ramachandran,Chellakutti; Dhanalakshmi,Kaliyaperumal; Vanitha,Lakshminarayanan.
ABSTRACT Key words: In recent years, applications of Bessel functions have been effectively used in the modelling of chemical engineering processes and theory of univalent functions.In this paper, we study a new class of analytic and univalent functions with negative coefficients in the open unit disk defined by Modified Hadamard product with Bessel function. We obtain coefficient bounds and exterior points for this new class.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Analytic function; Univalent function; Extreme point; Bessel function; Subordination; Hadamard Product.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000300603
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