2,271 research outputs found

    Comportamento de vôo, de alimentação e de reprodução de adultos de Phyllophaga cuyabana (Moser) (Coleoptera: Melolonthidae)

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    Phyllophaga cuyabana is a univoltine species and its development occurs completely underground. Its control by conventional methods, such as chemical and biological insecticides, is difficult, so it is important to understand its dispersion, reproduction, and population behavior in order to determine best pest management strategies. The objective of this work was to study the behavior of adults of P. cuyabana. This study was carried out in the laboratory, greenhouse and field sites in Paraná State, Brazil (24º25' S and 52º48' W), during four seasons. The results obtained demonstrate that: a) P. cuyabana adults have a synchronized short-flight period when mating and reproduction occurs; b) adults tend to aggregate in specific sites for mating; c) the majority of adults left the soil on alternate nights; d) the choice of mating and oviposition sites was made by females before copulation, since after copulation adults did not fly from or bury themselves at nearby locations; e) females that fed on leaves after mating, oviposited more eggs than females that had not fed;f) plant species such as sunflower (Helianthus annuus) and the Crotalaria juncea are important food sources for adults.Phyllophaga cuyabana é uma espécie univoltina cujo desenvolvimento ocorre no solo. Seu controle por inseticidas químicos e biológicos é difícil, assim é importante entender sua dispersão, reprodução e comportamento populacional a fim de identificar estratégias potenciais de manejo dessa praga. O objetivo deste trabalho foi estudar o comportamento de adultos de P. cuyabana. O estudo foi realizado em laboratório, casa de vegetação e campo, no Estado do Paraná, Brasil (24º25' S e 52º48' O), durante quatro safras. Os resultados obtidos demonstraram que: a) os adultos de P. cuyabana têm um vôo sincronizado durante um curto período quando ocorre o acasalamento e reprodução; b) os adultos tendem a se agregar em sítios específicos para o acasalamento; c) a maioria dos adultos deixa o solo em noites alternadas; d) a escolha do sítio de acasalamento e oviposição é feita pelas fêmeas antes da cópula; após a cópula os adultos não voam e se enterram em locais próximos; e) as fêmeas que ingerem folhas após o acasalamento ovipositam mais que as fêmeas que não se alimentam;f) espécies vegetais como girassol (Helianthus annuus) e Crotalaria juncea são importantes fontes de alimento para os adultos.179186Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

    Prospectus, February 19, 1997

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    https://spark.parkland.edu/prospectus_1997/1005/thumbnail.jp

    History, Evolution and Development of Human Resource Management: A Contemporary Perspective

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    Various attempts have been made towards tracing the historical development of the discipline of Human Resource Management (HRM). However, these initiatives have largely been concentrated on certain specific periods of time and experiences of specific countries and regions such as Australia, the USA, the UK and Asia (Nankervis et.al, 2011; Kelly, 2003; Ogier, 2003). This paper attempts to document the entire history of the discipline of Human Resource Management from a holistic perspective. The evolution and development of HRM will be traced right from the pre-historic times through to the postmodern world. Major characteristics in the evolution and development of HRM will also be examined and documented. Key words: Human Resource Management (HRM), evolution, histor

    Alice Mariett Correspondence

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    Entries include a personal handwritten biographical sketch with some information from her mother\u27s journal and handwritten letters

    Prospectus, March 18, 1997

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    https://spark.parkland.edu/prospectus_1997/1009/thumbnail.jp

    Alice Lounsberry Correspondence

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    Entries include a typed letter on personal stationery

    Alice Turner Curtis Correspondence

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    Entries include a handwritten letter and a printed publisher advertisement circular with a photographic image of Curtis, a short biography, and descriptions of The Little Maid and Yankee Girl books

    Prospectus, November 27, 1996

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    https://spark.parkland.edu/prospectus_1996/1031/thumbnail.jp

    Young Adults Performance of Unipedal Dynamic Balance with Various Footwear Conditions

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    International Journal of Exercise Science 13(4): 206-215, 2020. Wearing barefoot-style (minimalist) shoes is suggested as a transition between wearing shoes and barefoot running. Some sources equate wearing Vibram FiveFingers™(VFFs), a brand of barefoot shoes, with running/walking barefoot. Static and dynamic balance exercises are recommended. Little information is available on the effects barefoot shoes may have on dynamic balance. This study’s purpose was to examine dynamic balance when participants wore VFFs, athletic shoes, or went barefoot (BF). To test dynamic balance, participants used a modified version of the Star Excursion Balance Test (SEBT), in which the reaching leg followed only three spokes of the test: the anterior, posteromedial and posterolateral. For the timed test, participants touched down as quickly as possible in both directions using all 8 spokes. Thirty participants (ages 24.1+/-3.71 years) without lower extremity injury or experience wearing minimalist shoes were tested using the modified SEBT and a timed test wearing VFFs™, athletic shoes, or BF. Three trials for each footwear were completed for three reaching positions: anterior, posterolateral, posteromedial. The timed test measured (seconds) one counterclockwise and one clockwise direction of the 8-spoke figure. A repeated measures analysis of variance determined if any differences existed between footwear type and studied variables. Anterior reach was significantly greater when wearing shoes than with VFF or BF. Posteromedial reach was greater with shoes than BF. Time trials were not significantly different. Because no difference was found in any measured variables between VFF and BF, the results suggest wearing VFFS™ provided similar dynamic balance as going barefoot
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