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Oxygen- and capacity-limited thermal tolerance: blurring ecology and physiology ArchiMer
Jutfelt, Fredrik; Norin, Tommy; Ern, Rasmus; Overgaard, Johannes; Wang, Tobias; Mckenzie, David; Lefevre, Sjannie; Nilsson, Goran E.; Metcalfe, Neil B.; Hickey, Anthony J. R.; Brijs, Jeroen; Speers-roesch, Ben; Roche, Dominique G.; Gamperl, A. Kurt; Raby, Graham D.; Morgan, Rachael; Esbaugh, Andrew J.; Grans, Albin; Axelsson, Michael; Ekstrom, Andreas; Sandblom, Erik; Binning, Sandra A.; Hicks, James W.; Seebacher, Frank; Jorgensen, Christian; Killen, Shaun S.; Schulte, Patricia M.; Clark, Timothy D..
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00666/77823/79997.pdf
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Aggression supersedes individual oxygen demand to drive group air-breathing in a social catfish ArchiMer
Killen, Shaun S.; Esbaugh, Andrew J.; Martins, Nicolas F.; Rantin, F. Tadeu; Mckenzie, David J..
1. Group-living is widespread among animals and comes with numerous costs and benefits. To date, research examining group-living has focused on trade-offs surrounding foraging, while other forms of resource acquisition have been largely overlooked. 2. Air-breathing has evolved in many fish lineages, allowing animals to obtain oxygen in hypoxic aquatic environments. Breathing air increases the threat of predation, so some species perform group air-breathing, to reduce individual risk. Within species, individual air-breathing can be influenced by metabolic rate as well as personality, but the mechanisms of group air-breathing remain unexplored. It is conceivable that keystone individuals with high metabolic demand or intrinsic tendency to breathe air may...
Tipo: Text Palavras-chave: Air-breathing fish; Ecophysiology; Group-living; Keystone individuals; Metabolic rate; Social behaviour.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00417/52831/78979.pdf
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Using aerobic exercise to evaluate sub-lethal tolerance of acute warming in fishes ArchiMer
Blasco, Felipe R.; Esbaugh, Andrew J.; Killen, Shaun S.; Rantin, Francisco Tadeu; Taylor, Edwin W.; Mckenzie, David.
We investigated whether fatigue from sustained aerobic swimming provides a sub-lethal endpoint to define tolerance of acute warming in fishes, as an alternative to loss of equilibrium (LOE) during a critical thermal maximum (CTmax) protocol. Two species were studied, Nile tilapia (Oreochromis niloticus) and pacu (Piaractus mesopotamicus). Each fish underwent an incremental swim test to determine gait transition speed (U-GT), where it first engaged the unsteady anaerobic swimming mode that preceded fatigue. After suitable recovery, each fish was exercised at 85% of their own U-GT and warmed 1 degrees C every 30 min, to identify the temperature at which they fatigued, denoted as CTswim. Fish were also submitted to a standard CTmax, warming at the same rate...
Tipo: Text Palavras-chave: CTmax; Oreochromis niloticus; Piaractus mesopotamicus.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00640/75188/75324.pdf
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