108,176 research outputs found

    Application of participatory rural appraisal (PRA) techniques in the verification of fisheries data and trend on Lake Kainji

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    After several years of surveys on the Kainji Lake fisheries activities by the Nigerian German Kainji Lake Fish promotion Project (KLFPP) trends regarding catches, yield and other parameter begin to emerge. However, it became obvious that some of the data were not quite as accurate as they were believed to be. Looking at the different editions of the statistical bulletin of Kainji Lake, concerning one given fisheries parameter, sometimes it is possible to reveal inconsistencies and unexplained trends. As compared to the survey method, PRA is primarily for analysis of differences in local phenomenon and processes. Therefore, PRA was used as a complementary tool to enhance the knowledge on issues like fisher women, entrepreneurs, gear ownership structure, mode of operation by owners of large gear number, preference in the use of twine and nylon gill nets, and reasons for misinformation on the number of fishing equipment owned by entrepreneurs, which cannot be done with frame survey. PRA techniques like timeline, mapping, seasonal calendar, transect walk and key informant interviews were utilized in the study proces

    Unraveling the mechanisms of synapse formation and axon regeneration: the awesome power of C. elegans genetics.

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    Since Caenorhabditis elegans was chosen as a model organism by Sydney Brenner in 1960's, genetic studies in this organism have been instrumental in discovering the function of genes and in deciphering molecular signaling network. The small size of the organism and the simple nervous system enable the complete reconstruction of the first connectome. The stereotypic developmental program and the anatomical reproducibility of synaptic connections provide a blueprint to dissect the mechanisms underlying synapse formation. Recent technological innovation using laser surgery of single axons and in vivo imaging has also made C. elegans a new model for axon regeneration. Importantly, genes regulating synaptogenesis and axon regeneration are highly conserved in function across animal phyla. This mini-review will summarize the main approaches and the key findings in understanding the mechanisms underlying the development and maintenance of the nervous system. The impact of such findings underscores the awesome power of C. elegans genetics

    Making biodiversity measures accessible to non-specialists: An innovative method for rapid assessment of urban biodiversity

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    Urban biodiversity studies provide important inputs to studying the interactions between human societies and ecological systems. However, existing urban biodiversity methods are time intensive and/or too complex for the purposes of rapid biodiversity assessment of large urban sites. In this paper the authors present a biodiversity assessment method that is innovative in its approach, is reliable, and from which the data generated can be presented in an understandable way to non-ecologists. This method is based on measuring the land cover of different vegetation structures and the diversity of vascular plants, and then combining these into an overall biodiversity score. The land cover of vegetation structures was recorded by using a checklist in combination with Tandy’s Isovist Technique and the Domin cover scale. Vascular plant diversity was recorded at genus level by walking along defined transects within circular sampling areas of sixty five meter radius and using a checklist. A scoring procedure assigns an overall biodiversity score to different combinations of land cover of vegetation structures and vascular plant diversity. This method was tested in three urban locations in the United Kingdom which differed according to size, design and land use. Descriptive statistics of the resulting biodiversity scores differentiated between the biodiversity distribution within each one of the three locations, as well as across them. The main strength of this rapid biodiversity assessment method is its simplicity. Furthermore, by producing accurate results this biodiversity assessment method can be most useful in rapidly identifying areas where more detailed ecological surveys are needed

    The effect of climate change on the population of sycamore lace bug (Corythuca ciliata, Say) based on a simulation model with phenological response

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    Climate change affects on insect populations in many ways: it can cause a shift in geographical spread, abundance, or diversity, it can change the location, the timing and the magnitude of outbreaks of pests and it can define the phenological or even the genetic properties of the species. Long-time investigations of special insect populations, simulation models and scenario studies give us very important information about the response of the insects far away and near to our century. Getting to know the potential responses of insect populations to climate change makes us possible to evaluate the adaptation of pest management alternatives as well as to formulate our future management policy. In this paper we apply two simple models, in order to introduce a complex case study for a Sycamore lace bug population. We test how the model works in case the whether conditions are very different from those in our days. Thus, besides we can understand the processes that happen in present, we can analyze the effects of a possible climate change, as well

    Building professional qualifications as a model of integration and transfer of knowledge

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    The multi-faceted nature of transformations that occur in modern business encourages the evolution of concepts, methods and tools of competitiveness, as a result of which, dynamic changes are seen in the theory and practice of management. Marketing, one of the areas of management, encapsulates these changes. Created at the beginning of the 20th century as an academic field, management is based on adaptability adjustment processes. These should be accompanied by changes in the area of managerial education and their success is defined by knowledge transfer between theory and practice. The long established threefold rigid managerial education market (universities, training and consulting companies and so called Corporate Universities) does not guarantee the effective transfer of knowledge and, therefore, the effectiveness of managerial education. The idea of professional qualifications which draw from science as well as management experience, attempts to bridge that gap. Analysis of the operations of institutios that develop and promote professional qualifications, exemplified by The Chartered Institute of Marketing, proves that they may become, or perhaps already are, an effective mechanism for the integration and transfer of knowledge between the world of theory and management practice.Preparation and printing funded by the National Agency for Research and Development under project “Kreator Innowacyjności – wparcie dla Przedsiębiorczości akademickiej
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