3,770,717 research outputs found

    Complicated lives

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    "This document is a brief summary of the report entitled Complicated lives"Titre de l'écran-titre (visionné le 4 août 2008).Également disponible en format papier.Bibliogr

    Complicated lives

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    "This document is a brief summary of the report entitled Complicated lives"Titre de l'écran-titre (visionné le 4 août 2008).Également disponible en format papier.Bibliogr

    Life History, youth and identity

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    Conducting Life History Research With Adolescents

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    This article is a commentary on the life history approach, which specifically described aspects of and offered suggestions for conducting life history research with adolescents. The life history approach is well suited to a wide variety of types of health-related inquiry. In this article, the author used an exemplar study to show how well the life history approach was suited for questions regarding adolescent issues. This approach was also a good match for the developmental skills and needs of adolescents. The author uses the strengths and weaknesses of the approach and a detailed example of how she used the life history data to identify themes drawn from the exemplar study. She makes specific suggestions, including the development and implementation of an interview guide, planning and scheduling interviews, and the use of a life history grid. She includes examples of each suggestion and a sample life history grid

    Exploring intraspecific life history patterns in sharks

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    Marine ecosystems compose the major source (85%) of world fisheries production (Garcia and Newton, 1997). Although only a few fish species tend to dominate fishery catches (Jennings et al., 2001), a large diversity of fishes representing varied taxonomic levels, ecological guilds, and life histories is commonly taken. Recently, 66% of global marine resources were determined to be either fully, heavily, or over-exploited (Botsford et al., 1997). Considering the current state of many fisheries, the large diversity of species taken globally, and the general lack of resources to adequately assess many stocks, it has become important to develop shortcuts that may provide methods fisheries scientists can use to determine which stocks are in danger of overexploitation and which recovery plans are appropriate when biological data are limited (Stobutzki et al., 2001)

    Physical processes, their life and their history

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    Here, I lay the foundations of a high-level ontology of particulars whose structuring principles differ radically from the 'continuant' vs. 'occurrent' distinction traditionally adopted in applied ontology. These principles are derived from a new analysis of the ontology of “occurring” or “happening” entities. Firstly, my analysis integrates recent work on the ontology of processes, which brings them closer to objects in their mode of existence and persistence by assimilating them to continuant particulars. Secondly, my analysis distinguishes clearly between processes and events, in order to make the latter abstract objects of thought (alongside propositions). Lastly, I open my ontological inventory to properties and facts, the existence of which is commonly admitted. By giving specific roles to these primitives, the framework allows one to account for static and dynamic aspects of the physical world and for the way that subjects conceive its history: facts account for the life of substances (physical objects and processes), whereas events enable cognitive subjects to account for the life story of substances

    Life-history Traits of Stethorus Gilvifrons (Mulsant) (Coleoptera: Coccinellidae) on Phytophagous Mites Eutetranychus Orientalis Klein (Acari : Tetranychidae)

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    The research aims to know the life cycle, feeding and mating behavior of predatory beetle S. gilvifrons, and was conducted at entomology laboratory of Assessment Institute for agri-cultural technology Malang - East Java. The treatments involved feeding behavior and capacity of the various instars and imago of S. gilvifrons. The number of mites consumed within 24 hours by each stage of beetle was also recorded. The average voracity of five individual predators for each instar was determined. The result showed that average life cycle of S. gilvifrons feed on E. orientalis was 4.11 + 0.78; 8 + 1.10; 3.83 + 0.41, respectively for egg, larva and pupa. The predator caught the preys from the front side, then chewed and sucked the body contents of adult preys or consumed the whole egg. The feeding capacity was greater in egg-laying than that in non egg-laying females and males. The smallest size of the cage (1.5 cm diameter x 5 cm long) and clear weather were the most preferred situation for S. gilvifrons mating, which usually occurs on the upper leaf surface. The male positioned itself over the female body and extended its aedeagus to reach the female

    Glacial cycles promote greater dispersal, which can help explain larger clutch sizes, in north temperate birds

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    Earth’s glacial history and patterns in the life history traits of the planet’s avifauna suggest the following interpretations of how recent geological history has affected these key characteristics of the biota: 1) Increased colonizing ability has been an important advantage of increased dispersal, and life history strategies are better categorized by dispersive colonizing ability than by their intrinsic growth rates; 2) Birds of the North Temperate Zone show a greater tendency to disperse, and they disperse farther, than tropical or south temperate birds; 3) Habitat changes associated with glacial advance and retreat selected for high dispersal ability, particularly in the North; and 4) Selection for greater dispersal throughout the unstable Pleistocene has also resulted in other well-recognized life history contrasts, especially larger clutch sizes in birds of North Temperate areas
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