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Caractérisation empirique et détaillée des captures : Contribution à l'approche écosystémique des pêches ArchiMer
Fauconnet, Laurence.
The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its components to different management objectives. For doing so, this work relies on analyses of at-sea observer data. The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its...
Tipo: Text Palavras-chave: Pression de peche; Metriques de diversite; Rejets; Communautes marines; Gestion ecosystemique des peches; Selectivite; Observations a bord des navires de peche professionnelle; Comparaison d'engins; Analyses multivariees.; Shing pressure; Diversity metrics; Discards; Marine communities; Ecosystem approach to fisheries; Selectivity; Observations onboard professionnal fishing vessels; Gear comparison; Multivariate analyses.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00256/36717/35331.pdf
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Spatial distribution, association patterns and richness of tree species in a seasonal forest from the Serra Geral formation, southern Brazil Acta Botanica
Sühs,Rafael Barbizan; Budke,Jean Carlos.
This study aimed to determine the spatial distribution of the most abundant tree species, to look for relationships that may be responsible for their distribution and to compare the expected richness along the Serra Geral formation in the state of Rio Grande do Sul , Brazil. An one-hectare plot was divided in 100 contiguous 10 x 10 m sampling units and all individuals with at least 4.8 cm diameter at breast high were measured and identified. Each sampling unit received a description of the spatial position through metric coordinates (x,y) in order to quantify the spatial pattern. Later, an association index among species was applied. The observed richness was rarefied and compared to other surveys located on the slopes of Serra Geral in Rio Grande do Sul....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rarefaction; Diversity metrics; Spatial association; Aggregation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000300014
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