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Cardiac preload and venous return in swimming sea bass (Dicentrarchus labrax L.) ArchiMer
Sandblom, Erik; Farrell, Anthony; Altimiras, Jordi; Axelsson, Michael; Claireaux, Guy.
Cardiac preload (central venous; pressure, Pcv), mean circulatory filling pressure (MCFP), dorsal aortic blood pressure (P-DA) and relative cardiac output (Q) were measured in sea bass (Dicentrarchus labrax) at rest and while swimming at 1 and 2 BL s(-1). MCFP, an index of venous capacitance and the upstream venous pressure driving the return of venous blood to the heart, was measured as the plateau in Pcv during ventral aortic occlusion. Compared with resting values, swimming at 1 and 2BL s(-1) increased Q (by 15 +/- 1.5 and 38 +/- 6.5%, respectively), Pcv (from 0.11 +/- 0.01 kPa to 0.12 +/- 0.01 and 0.16 +/- 0.02 kPa, respectively), MCFP (from 0.27 +/- 0.02 kPa to 0.31 +/- 0.02 and 0.40 +/- 0.04 kPa, respectively) and the calculated pressure gradient for...
Tipo: Text Palavras-chave: Blood pressure; Cardiac rythm; Swimming aquaculture; Sea bass.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-421.pdf
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Conservation physiology of marine fishes: state of the art and prospects for policy ArchiMer
Mckenzie, David; Axelsson, Michael; Chabot, Denis; Claireaux, Guy; Cooke, Steven J.; Corner, Richard A.; De Boeck, Gudrun; Domenici, Paolo; Guerreiro, Pedro M.; Hamer, Bojan; Jorgensen, Christian; Killen, Shaun S.; Lefevre, Sjannie; Marras, Stefano; Michaelidis, Basile; Nilsson, Goran E.; Peck, Myron A.; Perez-ruzafa, Angel; Rijnsdorp, Adriaan D.; Shiels, Holly A.; Steffensen, John F.; Svendsen, Jon C.; Svendsen, Morten B. S.; Teal, Lorna R.; Van Der Meer, Jaap; Wang, Tobias; Wilson, Jonathan M.; Wilson, Rod W.; Metcalfe, Julian D..
The state of the art of research on the environmental physiology of marine fishes is reviewed from the perspective of how it can contribute to conservation of biodiversity and fishery resources. A major constraint to application of physiological knowledge for conservation of marine fishes is the limited knowledge base; international collaboration is needed to study the environmental physiology of a wider range of species. Multifactorial field and laboratory studies on biomarkers hold promise to relate ecophysiology directly to habitat quality and population status. The 'Fry paradigm' could have broad applications for conservation physiology research if it provides a universal mechanism to link physiological function with ecological performance and...
Tipo: Text Palavras-chave: Biomarkers; Ecological models; Fisheries; Fry paradigm; Individual variation; Telemetry.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00616/72841/72999.pdf
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