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Can we detect the effects of environmental variations on fish populations through VPA outputs? the North Atlantic albacore case ArchiMer
Kell, Laurence T; Fromentin, Jean-marc; Ortiz De Zarate, Victoria; Arrizabalaga, Haritz.
Past studies have indicated that numbers-at-age 1 of albacore may be correlated with the winter NAO index in the previous year. Two main hypotheses have been stressed to explain such observation, i.e. an impact of the NAO on the recruitment or on migration patterns and consequently in the availability and catchability of specific age classes to the surface fishery. The objective of the present paper is to test whether such processes can be distinguished using VPA outputs. We first computed simple cross-correlations between the NAO at various lags, catches-at-age, Numbers-atage and F-at-age estimated in the last assessment. Since results were inconclusive, simulations were undertaken. The results showed that the probability of detecting spurious...
Tipo: Text Palavras-chave: Thunnus alalunga; North Atlantic Oscillation; Simulation model; Virtual population analysis; Correlation coefficient; NAO.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/00194/30503/28913.pdf
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Genetic correlation and path analysis of common bean collected from Caceres Mato Grosso State, Brazil Ciência Rural
Gonçalves,Danilo de Lima; Barelli,Marco Antonio Aparecido; Oliveira,Taniele Carvalho de; Santos,Paulo Ricardo Junges dos; Silva,Claudete Rosa da; Poletine,Juliana Parisotto; Neves,Leonarda Grillo.
ABSTRACT: The aim of the study was to determine genetic correlations of agronomic traits and to evaluate direct and indirect effects, through path analysis, between variables analyzed with grain yield. Forty accessions of common bean, cultivated at Caceres County were evaluated, by using randomized complete blocks design with three repetitions. Coefficient magnitudes of genotypic correlations were superior to phenotypic and environmental ones for most correlations, suggesting greater influence of genetic factor than environmental factors. In order to determine the importance of direct and indirect effects, path analysis was performed, which provided greater reliability in interpretations of cause and effect between studied traits, indicating that grain...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomic traits; Correlation coefficient; Crop breeding; Phaseolus vulgaris L.; Grains yield..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000800201
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