Chronic stress of rainbow trout Oncorhynchus mykiss at high altitude: a field study

dc.creatorHunt von Herbing, Ione;#0000-0003-4335-6878
dc.creatorPan, Francis;#0000-0002-1550-4581
dc.creatorGARDUÑO PAZ, MONICA VANESSA; 220811
dc.creatorHernández Gallegos, Oswaldo; 36845
dc.creatorMENDEZ SANCHEZ, JOSE FERNANDO; 80843
dc.creatorRuiz Gómez, María de Lourdes; 220569
dc.creatorRodríguez Vargas, Georgina;x1345674
dc.creatorHunt von Herbing, Ione
dc.creatorPan, Francis
dc.creatorGARDUÑO PAZ, MONICA VANESSA
dc.creatorHernández Gallegos, Oswaldo
dc.creatorMENDEZ SANCHEZ, JOSE FERNANDO
dc.creatorRuiz Gómez, María de Lourdes
dc.creatorRodríguez Vargas, Georgina
dc.date2017-03-07T17:35:49Z
dc.date2017-03-07T17:35:49Z
dc.date2015-07-06
dc.date.accessioned2022-10-12T22:57:25Z
dc.date.available2022-10-12T22:57:25Z
dc.identifier1095-8649
dc.identifierhttp://hdl.handle.net/20.500.11799/65291
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4149475
dc.descriptionThe stress response of Oncorhynchus mykiss in high-altitude farms in central Mexico was investigated over two seasons: the cool (9⋅1–13⋅7∘ C) dry winter season, and the warmer (14⋅7–15⋅9∘ C), wetter summer season. Fish were subjected to an acute stress test followed by sampling of six physiological variables: blood cortisol, glucose, lactate, total antioxidant capacity, haemoglobin concentration and per cent packed cell volume (VPC%). Multivariate analyses revealed that lactate and total antioxidant capacity were significantly higher in the summer, when water temperatures were warmer and moderate hypoxia (4⋅9–5⋅3 mgl−1) prevailed. In contrast, plasma cortisol was significantly higher in the winter (mean±s.e.: 76⋅7±4⋅0 ngml−1) when temperatures were cooler and dissolved oxygen levels higher (6⋅05–7⋅9 mgl−1), than in the summer (22⋅7±3⋅8 ngml−1 ). Haemoglobin concentrations (mg dl−1) were not significantly different between seasons, but VPC% was significantly higher in the summer (50%) than in the winter (35%). These results suggest that in summer, effects of high altitude on farmed fish are exacerbated by stresses of high temperatures and hypoxia, resulting in higher blood lactate, increased total antioxidant capacity and elevated VPC% levels.
dc.languageeng
dc.publisherWiley
dc.rightsopenAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectalpine; aquaculture; hypoxia; Mexico; salmonids; temperature
dc.subjectCIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA
dc.titleChronic stress of rainbow trout Oncorhynchus mykiss at high altitude: a field study
dc.typeArtículo
dc.typearticle


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