31 research outputs found

    Protein and microsatellite single locus variability in salmo salar l. (atlantic salmon)

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    We describe genetic variation at three microsatellite single loci and six allozyme loci of seven natural Atlantic salmon populations from Ireland and Spain. A comparison of genetic variability detected at both types of loci is performed. Also, the relative value of microsatellite single locus variability with regard to the identification of individual salmon populations is assessed. Microsatellite loci are shown to display higher levels of variation than allozyme loci. Mean number of alleles (6+/-1.53) and heterozygosity (0.46+/-0.04) at microsatellite loci are greater than those found for allozymes (1.85+/-0.05 and 0.21+/-0.03, respectively), and some microsatellite alleles appear to be specific for a location or geographical area. Allozyme and microsatellite variation show the same pattern of differentiation between populations with Irish and Spanish populations grouped into different clusters. However, greater values of genetic distance were found among microsatellite (D=0.0747+/-0.011) rather than among allozyme loci (D=0.0449+/-0.008). These results provide evidence that microsatellite-based analysis of genetic variation will be useful in the identification of individual populations of Atlantic salmon

    Protein and microsatellite single locus variability in salmo salar l. (atlantic salmon)

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    We describe genetic variation at three microsatellite single loci and six allozyme loci of seven natural Atlantic salmon populations from Ireland and Spain. A comparison of genetic variability detected at both types of loci is performed. Also, the relative value of microsatellite single locus variability with regard to the identification of individual salmon populations is assessed. Microsatellite loci are shown to display higher levels of variation than allozyme loci. Mean number of alleles (6+/-1.53) and heterozygosity (0.46+/-0.04) at microsatellite loci are greater than those found for allozymes (1.85+/-0.05 and 0.21+/-0.03, respectively), and some microsatellite alleles appear to be specific for a location or geographical area. Allozyme and microsatellite variation show the same pattern of differentiation between populations with Irish and Spanish populations grouped into different clusters. However, greater values of genetic distance were found among microsatellite (D=0.0747+/-0.011) rather than among allozyme loci (D=0.0449+/-0.008). These results provide evidence that microsatellite-based analysis of genetic variation will be useful in the identification of individual populations of Atlantic salmon

    Hydrology and the Water Framework Directive in Ireland

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    The Water Framework Directive has been the catalyst for a considerable amount of data collection, analysis and research covering a wide range of physical and biological characteristics and involving a wide range of scientific, social and management related disciplines. This paper starts with a short description of the discipline of hydrology and then identifies the main hydrological aspects of work for the WFD and notes their ecological significance. Some idea is given of the range of organisations and disciplines involved in the work and of the links between them. Of particular significance is the degree of cooperation between River Basin Districts in setting up working groups for special studies, avoiding overlaps in research.Other funderWater Framework DirectivePlease replace pdf with published version http://www.ria.ie/RIA/files/07/0764837f-7c6a-454f-a6da-454f5977c0af.pdf - AV 2/08/201
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