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	Provedor de dados AgEcon (1) ArchiMer (1) Autor Bergamini, Ariel (1) Biseau, Alain (1) Lederbogen, Dirk (1) Roeder, Norbert (1) Scheidegger, Christoph (1) Stofer, Silvia (1) Trautner, Juergen (1) Mais... Palavra-chave Target species (2) Agent based modelling (1) Agriculture (1) Atlantique NE (1) BioAssess (1) Biodiversity (1) CAP (1) Calibration de l'analyse de cohorte (1) Chain tage (1) Directed effort (1) EC Habitats Directive (1) Effort de pêche (1) Espèces-cibles (1) Impact assessment (1) Land Economics/Use (1) Metier (1) Multi-species fisheries (1) Métier (1) NE Atlantic (1) Pêche pluri-spécifique (1) Mais... Tipo do documento Conference Paper or Presentation (1) Text (1) Ano 2009 (1) 1998 (1) País France (1) United States (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Definition of a directed fishing effort in a mixed-species trawl fishery, and its impact on stock assessments ArchiMer Biseau, Alain. Catch-per-unit effort (CPUE) has frequently been used as an index of abundance and more specifically to calibrate virtual population analysis (VPA). In multi-species fisheries, CPUE calculated from fishing trips targeting the species seems to be more effective for calibration than the classical ratio total landings/total effort. Target species are determined from an analysis of the composition of catches (landings) of each fishing trip, each trip being categorised as to whether it targets the given species or not. It is obvious that existing but not reported discards would affect these results. Classification of trips can be achieved on a single-species basis, each species being considered successively and each trip possibly being relevant for more than... Tipo: Text Palavras-chave: Pêche pluri-spécifique; Chain tage; Effort de pêche; Espèces-cibles; Métier; Calibration de l'analyse de cohorte; Atlantique NE; Multi-species fisheries; Directed effort; Target species; Metier; Tuned virtual population analysis; Stock assessment; NE Atlantic. Ano: 1998 URL: https://archimer.ifremer.fr/doc/1998/publication-874.pdf The impact of changing agricultural policies on jointly used rough pastures in the Bavarian Pre-Alps - an economic and ecological scenario approach AgEcon Roeder, Norbert; Lederbogen, Dirk; Trautner, Juergen; Bergamini, Ariel; Stofer, Silvia; Scheidegger, Christoph. The following paper assesses the impact of different policy options on the land use and associated biodiversity values of jointly organized low intensity grazing systems (‘Allmende’) in Southern Bavaria. We use an integrated economic and ecological modelling approach to compare the results of the scenarios with a reference situation that reflects the Common Agricultural Policy prior to the Fischler Reform. The economic sub model is based on single farms which alter their land use in response to economic stimuli. Within the economic part, key factors like the farm’s endowment with machinery, quota and buildings but also the farmer’s attitude are regarded. Within the rule based ecological sub model we analyze three main parameters: (a) protected habitats... Tipo: Conference Paper or Presentation Palavras-chave: CAP; Agent based modelling; BioAssess; Impact assessment; Biodiversity; Agriculture; Target species; EC Habitats Directive; Land Economics/Use; Q18; Q57. Ano: 2009 URL: http://purl.umn.edu/51070 Registros recuperados: 2 Primeira ... 1 ... Última

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