Consulta: subjectFacets:"Standard metabolic rate"
Registros recuperados: 4
Data/hora: 10/06/2024 15:54:30

Individuals exhibit consistent differences in their metabolic rates across changing thermal conditions
Provedor de dados: 5
Autores: Auer, Sonya K.; Salin, Karine; Anderson, Graeme J.; Metcalfe, Neil B.
Metabolic rate has been linked to growth, reproduction, and survival at the individual level and is thought to have far reaching consequences for the ecology and evolution of organisms. However, differences in metabolic rate among individuals must be consistent (i.e. repeatable) over at least some portion of their lifetime in order to predict their longer-term effects on population dynamics and how they will respond to selection. Previous studies demonstrate that metabolic rates are repeatable under constant conditions but potentially less so in more variable environments. We measured the standard (= minimum) metabolic rate, maximum metabolic rate, and aerobic scope (= interval between standard and maximum rates) in juvenile brown trout (Salmo trutta)...
Tipo: Text
Palavras-chave: Aerobic scope; Consistency; Maximum metabolic rate; Standard metabolic rate; Stability; Thermal repeatability.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00414/52585/53425.pdf

Aerobic scope explains individual variation in feeding capacity
Provedor de dados: 5
Autores: Auer, Sonya K.; Salin, Karine; Anderson, Graeme J.; Metcalfe, Neil B.
Links between metabolism and components of fitness such as growth, reproduction and survival can depend on food availability. A high standard metabolic rate (SMR; baseline energy expenditure) or aerobic scope (AS; the difference between an individual's maximum and SMR) is often beneficial when food is abundant or easily accessible but can be less important or even disadvantageous when food levels decline. While the mechanisms underlying these context-dependent associations are not well understood, they suggest that individuals with a higher SMR or AS are better able to take advantage of high food abundance. Here we show that juvenile brown trout (Salmo trutta) with a higher AS were able to consume more food per day relative to individuals with a lower AS....
Tipo: Text
Palavras-chave: Energy metabolism; Fitness; Food intake; Maximum metabolic rate; Salmo trutta; Standard metabolic rate.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00414/52505/53324.pdf

Physiological mechanisms underlying a trade-off between growth rate and tolerance of feed deprivation in the European sea bass (Dicentrarchus labrax)
Provedor de dados: 5
Autores: Dupont-prinet, A.; Chatain, Beatrice; Grima, L.; Vandeputte, Marc; Claireaux, Guy; Mckenzie, David.
The specific growth rate (SGR) of a cohort of 2000 tagged juvenile European sea bass was measured in a common tank, during two sequential cycles comprising three-weeks feed deprivation followed by three-weeks ad libitum re-feeding. After correction for initial size at age as fork length, there was a direct correlation between negative SGR (rate of mass loss) during feed deprivation and positive SGR (rate of compensatory growth) during re-feeding (Spearman rank correlation R=0.388, P=0.000002). Following a period of rearing under standard culture conditions, individuals representing 'high growth' phenotypes (GP) and 'high tolerance of feed deprivation' phenotypes (DP) were selected from either end of the SGR spectrum. Static and swimming respirometry could...
Tipo: Text
Palavras-chave: Aerobic scope; Compensatory growth; Specific dynamic action; Specific growth rate; Standard metabolic rate.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11283/8517.pdf

Water temperature, body mass and fasting heat production of pacu (Piaractus mesopotamicus)
Provedor de dados: 42
Autores: AGUILAR,FREDY A.A.; CRUZ,THALINE M.P. DA; MOURÃO,GERSON B.; CYRINO,JOSÉ EURICO P.
ABSTRACT Knowledge on fasting heat production (HEf) of fish is key to develop bioenergetics models thus improving feeding management of farmed species. The core of knowledge on HEf of farmed, neotropical fish is scarce. This study assessed the effect of body mass and water temperature on standard metabolism and fasting heat production of pacu, Piaractus mesopotamicus, an omnivore, Neotropical fresh water characin important for farming and fisheries industries all through South American continent. An automated, intermittent flow respirometry system was used to measure standard metabolic rate (SMR) of pacu (17 - 1,050 g) at five water temperatures: 19, 23, 26, 29 and 33 °C. Mass specific SMR increased with increasing water temperature but decreased as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric exponent; Bioenergetics models; Pacu; Respirometry; Standard metabolic rate.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301305