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| Registros recuperados: 15 | |
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| Chaulet,Anouk; Vatnick,Itzick; Rodríguez,Enrique M.. |
| Growth, metabolic rate, and energy reserves of Cherax quadricarinatus (von Martens, 1868) juveniles were evaluated in crayfish acclimated for 16 weeks to either 25ºC (temperature near optimum) or 20ºC (marginal for the species). Additionally, the modulating effect of ecdsyone on acclimation was studied. After 12 weeks of exposure, weight gain of both experimental groups acclimated to 25ºC (control: C25, and ecdysone treated: E25) was significantly higher than that of those groups acclimated to 20ºC (C20 and E20). A total compensation in metabolic rate was seen after acclimation from 25ºC to 20ºC; for both the control group and the group treated with ecdysone. A Q10value significantly higher was only observed in the group acclimated to 20ºC and treated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy reserves; Growth; Metabolic rate; Q10. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000200009 |
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| Kraffe, E; Tremblay, R; Belvin, S; Le Coz, Jean-rene; Marty, Y; Guderley, H. |
| In scallops, gametogenesis and spawning can diminish the metabolic capacities of the adductor muscle and reduce escape response performance. To evaluate potential mechanisms underlying this compromise between reproductive investment and escape response, we examined the impact of reproductive stage (pre-spawned, spawned and reproductive quiescent) of the giant scallop, Placopecten magellanicus, on behavioural (i.e., escape responses), physiological (i.e., standard metabolic rates and metabolic rates after complete fatigue) and mitochondrial capacities (i.e., oxidative rates) and composition. Escape responses changed markedly with reproductive investment, with spawned scallops making fewer claps and having shorter responses than pre-spawned or... |
| Tipo: Text |
Palavras-chave: Placopecten magellanicus; Sterols; Fatty acids; Plasmalogens; Phospholipids; Cytochrome C oxidase; Metabolic rate; Escape response; Muscle; Scallops; Reproduction; Mitochondria. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4786.pdf |
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| Comoglio, Li; Gaxiola, G; Roque, A; Cuzon, Gerard; Amin, O. |
| Juveniles of the white shrimp Litopenaeus vannamei were kept Without food for between 0 to 15 clays to evaluate the impact of starvation oil physiologic state (oxygen consumption, poststarvation refeeding, index, nitrogen excretion, and O:N ratio) and digestive enzymes activity. Physiologic changes were found after 6 days of fasting, and refeeding ability declined as a result. Nevertheless. the shrimp were able to Survive 16 days Without food. Starvation Caused metabolism to drop progressively toward a basal level (21 J (.) h(-1 .) g(-1)) and a decrease in the rate of ammonia excretion, because of the catabolism of amino acids front soluble protein in the hepatopancreas. This decrease led to an increase in digestive enzymes specific activity (U/mg... |
| Tipo: Text |
Palavras-chave: Digestive enzymes; Litopenaeus vannamei; Metabolic rate; Shrimp; Starvation. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00000/10877/7911.pdf |
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| Robson, Anthony A.; Halsey, Lewis G.; Chauvaud, Laurent. |
| The effects of unnatural disturbances on the behaviour and energetics of animals are an important issue for conservation and commercial animal production. Biologging enables estimation of the energy costs of these disturbances, but not specifically the effect these costs have on growth; a key outcome measure for animal farming enterprises. We looked at how natural and anthropogenically induced activity and energy expenditure of king scallops Pecten maximus varies with temperature. These data were then used to model growth time of king scallops reared in an aquaculture facility under different temperatures and anthropogenic disturbance levels. The scallops exhibited a typical total metabolic rate (MR)-temperature curve, with a peak reached at a middling... |
| Tipo: Text |
Palavras-chave: Growth; Temperature; Anthropogenic disturbance; Activity; Metabolic rate; Energy expenditure. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00344/45561/72893.pdf |
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| Mckenzie, David; Blasco, Felipe R.; Belao, Thiago C.; Killen, Shaun S.; Martins, Nathan D.; Taylor, Edwin W.; Tadeu Rantin, F.. |
| Individual variation in sub-lethal sensitivity to the organophosphate pesticide trichlorfon was investigated in Nile tilapia, using critical swimming speed (U-crit) as an indicator. Tilapia exposed for 96 h to 500 mu g l-1 trichlorfon at 26 degrees C (Tcfn group, n = 27) showed a significant decline in mean U-crit, compared to their own control (pre-exposure) performance in clean water (-14.5 +/- 2.3%, mean +/- SEM), but also compared to a Sham group (n = 10) maintained for 96 h in clean water. Individuals varied in their relative sensitivity to the pesticide, with the decline in U-crit after exposure varying from 1 to 41%. The U-crit of the Tcfn group did not recover completely after 96 h in clean water, remaining 9.4 +/- 3.2% below their own control... |
| Tipo: Text |
Palavras-chave: Trichlorfon; Critical swimming speed; Metabolic rate; Respirometry; Nile tilapia; Individual variation. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00625/73705/74889.pdf |
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| Pineda, Mar; Aragao, Isabel; Mckenzie, David; Killen, Shaun S.. |
| In some fishes, the ability to breathe air has evolved to overcome constraints in hypoxic environments but comes at a cost of increased predation. To reduce this risk, some species perform group air breathing. Temperature may also affect the frequency of air breathing in fishes, but this topic has received relatively little research attention. This study examined how acclimation temperature and acute exposure to hypoxia affected the air-breathing behaviour of a social catfish, the bronze corydoras Corydoras aeneus, and aimed to determine whether individual oxygen demand influenced the behaviour of entire groups. Groups of seven fish were observed in an arena to measure air-breathing frequency of individuals and consequent group air-breathing behaviour,... |
| Tipo: Text |
Palavras-chave: Air-breathing fish; Environmental stress; Metabolic rate; Oxygen; Social behaviour. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00661/77271/78705.pdf |
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| Killen, Shaun S.; Croft, Darren P.; Salin, Karine; Darden, Safi K.. |
| Sexual coercion of females by males is widespread across sexually reproducing species. It stems from a conflict of interest over reproduction and exerts selective pressure on both sexes. For females, there is often a significant energetic cost of exposure to male sexually coercive behaviours. Our understanding of the efficiency of female resistance to male sexually coercive behaviour is key to understanding how sexual conflict contributes to population level dynamics and ultimately to the evolution of sexually antagonistic traits. Overlooked within this context are plastic physiological responses of traits within the lifetime of females that could moderate the energetic cost imposed by coercive males. Here, we examined whether conflict over the frequency... |
| Tipo: Text |
Palavras-chave: Locomotion; Metabolic rate; Phenotypic plasticity; Sexual conflict; Teleost fish. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00414/52502/53313.pdf |
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| 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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| Person, Jeannine; Mahe, Kelig; Le Bayon, Nicolas; Le Delliou, Herve. |
| Growth and metabolism of juvenile European sea bass of a Western Mediterranean population were assessed at six constant temperatures (13, 16, 19, 22, 25 or 29 degreesC) in an 84-day trial. Duplicated groups of 84 fish (initial weight 80 I g) were held under O-2-concentrations close to saturation (87 mg l(-1)) and were fed to satiation. Mass gain increased as temperature increased from 13 to 25 degreesC. At 25 and 29 degreesC, growth was similar up to day 72, but a 6% decrease was observed by day 84 at 29 degreesC. Days 0-84 specific growth rates (SGR) were 0.45%,1.29% and 1.21% day(-1) at 13, 25 and 29 degreesC, respectively. The estimated temperature (7) for maximum SGR was 26 degreesC (SGR = 1.715 - 0.322T + 0.022T(2) - 4.233e(-4)T(3)). Feed intake (FI)... |
| Tipo: Text |
Palavras-chave: Oxygen consumption; Fish culture; Thermal requirement; Metabolic rate; Feeding. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-626.pdf |
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| FUENTES,LEOPOLDO; VILA,IRMA; CONTRERAS,MANUEL. |
| We evaluated the influence of water temperature (Tw) on the energy acquisition and use in the chilean silverside Basilichthys australis (Eigenmann 1927), an endemic species inhabiting freshwater ecosystems in Chile. We tested the effect of Tw (11.5, 14.0, 18.0, 22.0 and 26.0 °C) on food intake, digestibility, food transit time and metabolic rate. As expected, this study demonstrated that many physiological variables under study were significantly affected by Tw, as well as the net energy balance of this species. Nevertheless, the net energy balance was not strictly related to the range of Tws evaluated. At Tws lower than 14 °C the energy budget was depressed, because food intake was lower than at Tws between 14 and 26 °C, where food intake was higher and... |
| Tipo: Journal article |
Palavras-chave: Water temperature; Metabolic rate; Food consumption; Digestion; Energy budget; Basilichthys australis. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200014 |
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| Nespolo,Roberto F; Sepúlveda,Roger D; Castañeda,Luis E; Roff,Derek A. |
| Respiration and energy metabolism are key processes in animals, which are severely constrained by the design of physical structures, such as respiratory structures. Insects have very particular respiratory systems, based on gas diffusion across tracheae. Since the efficiency of the tracheal respiratory system is highly dependent on body shape, the pattern of morphological variation during ontogeny could have important metabolic consequences. We studied this problem combining through-flow respirometry and geometric morphometrics in 88 nymphs of the sand cricket, Gryllus firmus. After measuring production in each individual, we took digital photographs and defined eight landmarks for geometric morphometric analysis. The analysis suggested that ontogenic... |
| Tipo: Journal article |
Palavras-chave: Shape variations; Metabolic rate; Morphology; Insect respiration; Orthopter; Sand crickets. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000100009 |
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| NESPOLO,ROBERTO F; CASTAÑEDA,LUIS E; ROFF,DEREK A. |
| Compared with morphological and life history traits, quantitative genetic variation of metabolic and related traits in animals has been poorly studied. We used flow-through VC0(2) respirometry and simultaneous activity measurement on nymphs of the sand cricket {Gryllus firmus) from inbred lines to estimate broad-sense heritability of four metabolic variables. In addition, we measured a number of linear dimensions in the adults from the same inbred lines. There were significant multivariate effects of inbred lines for all traits and broad-sense heritability for physiological traits was 4.5%, 5.2%, 10.3% and 8.5% for average, resting, minimum and maximum C0(2) production in nymphs, respectively. Though the MANOVA indicated significant genetic variation among... |
| Tipo: Journal article |
Palavras-chave: Broad-sense heritability; Metabolic rate; Insects; Inbred lines; Through-flow C0(2) respirometry. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000100001 |
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| Registros recuperados: 15 | |
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