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3D modelling in the Sado estuary using a new generic vertical discretization approach ArchiMer
Martins, F; Leitao, P; Silva, A; Neves, R.
Sado estuary (Portugal) is a mesotidal well-mixed estuary. The flow however, displays strong three-dimensional features associated with bathymetry variations. The flow is simulated using a three-dimensional primitive equation model based on the finite-volume method and incorporating a new concept for the vertical discretization. The innovative features of the model are analysed and the advantages of the finite-volume method to implement the generic vertical discretization are put into evidence. The model was validated using water level, velocity and salinity measurements in several stations along the estuary. Results show the influence of main channel's strong curvature on the generation of secondary flows inside the estuary. The steep bathymetry of the...
Tipo: Text Palavras-chave: Estuaires; Modélisation numérique; Écoulements secondaires; Recirculation verticale; Discrétisation verticale générique; Estuaries; Numerical modelling; Secondary flows; Vertical recirculation; Generic vertical discretization.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00291/40270/38641.pdf
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Geographic variability of sardine growth across the northeastern Atlantic and the Mediterranean Sea ArchiMer
Silva, A; Carrera, P; Masse, Jacques; Uriarte, A; Santos, M; Oliveira, P; Soares, E; Porteiro, C; Stratoudakis, Y.
This study describes broad-scale spatial variations in sardine growth across the northeastern Atlantic and Mediterranean waters using opportunistic samples collected in recent years. More detailed information on spatial, decadal and seasonal growth variations is provided for the Iberian-Biscay region using data collected in acoustic surveys since the mid-1980s. Growth curves are fitted to annual or monthly length-at-age data using a robust Von Bertalanffy model; parameters for recent samples are compared with literature information using an auximetric plot while differences between areas within the Iberian-Biscay region are tested by log-likelihood ratio tests. Sardine growth performance is generally lower in the Mediterranean and declines across the...
Tipo: Text Palavras-chave: Iberian Biscay region; Spatio temporal variation; Growth; Sardina pilchardus.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4078.pdf
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The role of fisheries-induced evolution - Response ArchiMer
Jorgensen, C; Enberg, K; Dunlop, E; Arlinghaus, R; Boukal, D; Brander, K; Ernande, Bruno; Gardmark, A; Johnston, F; Matsumura, S; Pardoe, H; Raab, K; Silva, A; Vainikka, A; Dieckmann, U; Heino, M; Rijnsdorp, A.
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Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-3913.pdf
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