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Redundancy in metrics describing the composition, structure, and functioning of the North Sea demersal fish community 5
Greenstreet, Simon P. R.; Fraser, Helen M.; Rogers, Stuart I.; Trenkel, Verena; Simpson, Stephen; Pinnegar, John K..
Broader ecosystem management objectives for North Sea demersal fish currently focus on restoring community size structure. However, most policy drivers explicitly concentrate on restoring and conserving biodiversity, and it has not yet been established that simply restoring demersal fish size composition will be sufficient to reverse declines in biodiversity and ensure a generally healthy community. If different aspects of community composition, structure, and function vary independently, then to monitor all aspects of community general health will require application of a suite of metrics. This assumes low redundancy among the metrics used in any such suite and implies that addressing biodiversity issues specifically will require explicit management...
Tipo: Text Palavras-chave: Community health; Community size structure; Ecosystem approach to management; Life-history-trait metrics; Metric suites; Species diversity; State indicators.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00056/16709/14201.pdf
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Relative contributions of different sole and plaice nurseries to the adult population in the Eastern Channel: application of a combined method using generalized linear models and a geographic information system 5
Riou, Philippe; Le Pape, Olivier; Rogers, Stuart I..
The Eastern Channel (ICES division 7d) is considered a unit for stock management of the common sole Solea solea and the plaice Pleuronectes platessa. At this scale, the aim of this work is to model the juvenile distribution of these flatfish. The database used, based on different surveys undertaken during the two last decades, includes 4500 coastal beam trawl hauls throughout the Eastern Channel coasts. Multivariate analyses are used to study the interannual fluctuations in flatfish recruitment of the region. This approach allows us to separate the Eastern Channel into homogeneous sectors with regard to these fluctuations. The physical parameters that contribute to the observed juvenile sole and plaice distributions are identified and their distributions...
Tipo: Text Palavras-chave: Eastern Channel; Solea solea; Pleuronectes platessa; Nursery grounds; Geographical information system; Statistical models; Solea solea; Pleuronectes platessa; Nourricerie; Manche Est; Système d'information géographique; Modèles statistiques.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-551.pdf
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