Contest winning and metabolic competence in male bank voles Clethrionomys glareolus

Behaviour ◽  
2004 ◽  
Vol 141 (3) ◽  
pp. 343-354 ◽  
Author(s):  
Marta Labocha ◽  
Małgorzata Kruczek ◽  
Jacek Radwan ◽  
Paweł Koteja ◽  
Katarzyna Grabiec

AbstractFamale bank voles prefer dominant males as mates, and it has been suggested that this preference may benefit females genetically, via increased fitness of their progeny. This requires that male ability to win intrasexual contests is associated with their genetic quality. An important aspect of individual quality is metabolic competence. Here, we investigated whether male ability to win contests is correlated with aerobic capacity (the maximum rate of oxygen consumption) or factorial aerobic scope (the ratio of aerobic capacity to basal metabolic rate [BMR]). The ability to win was assessed as proportion of dominant behaviours in staged contests with five other males, and aerobic capacity was measured both during exercise (swimming) and during cold-exposure trials. Contest winning ability was not correlated with the aerobic capacity (p > 0.6), the factorial metabolic scope (p > 0.25) or BMR (p = 0.24; all the traits were corrected for the effect of body mass). Thus, the results indicate that the trait (male dominance) subject to female preference in the bank vole fails to reveal an important aspect of male quality, i.e. his metabolic competence.

2000 ◽  
Vol 203 (13) ◽  
pp. 2053-2064 ◽  
Author(s):  
K.A. Hammond ◽  
M.A. Chappell ◽  
R.A. Cardullo ◽  
R. Lin ◽  
T.S. Johnsen

We examined aerobic performance, organ and muscle mass and enzymatic activity in red junglefowl (Gallus gallus). We tested three models of performance limitation (central limits, peripheral limits, symmorphosis) and explored relationships between basal metabolic rate (BMR), aerobic capacity (V (O2max)) and social rank. Males had a lower BMR, a higher V (O2max) and a greater aerobic scope than females. Females possessed larger peritoneal and reproductive organs, while males had larger hearts, lungs and leg muscles. In females, BMR was correlated with spleen mass and V (O2max) was correlated with hematocrit and large intestine mass. Male BMR was correlated with intestinal tract and lung mass, and V (O2max) was correlated with heart and pectoralis mass. Male citrate synthase activity averaged 57 % higher than that of females and was correlated with V (O2max) (this correlation was not significant in females). Female social status was not correlated with any variable, but male dominance was associated with higher aerobic scope, larger heart and lungs, smaller peritoneal organs and greater leg citrate synthase activity. We conclude that aerobic capacity is controlled by system-wide limitations (symmorphosis) in males, while in females it is controlled by central organs. In neither sex is elevated aerobic capacity associated with increased maintenance costs.


1985 ◽  
Vol 118 (1) ◽  
pp. 133-142 ◽  
Author(s):  
WOLFGANG WIESER

1. The relationship between routine or ‘steady’ rate (Vo2s.r.) and maximum rate of metabolism after forced bursts of activity (V·o2max) was studied in the fry and young (weight range 0.08-7 g) of Salmo gairdneri at 4 and 12°C. 2. The relationship between metabolic rate (y) and body weight (x) can be described by the function y = axb. The mass exponent b equals 0.96 and 0.93 for the routine rate, and 1.11 and 1.14 for the maximum rate of metabolism at 4 and 12°C respectively, the two sets of b-values differing significantly from each other. 3. The difference between the routine and the active rate of metabolism is called the relative scope for activity. Expressed as a percentage of the routine rate it increases from 85–166% in the sac fry, to approximately 400% in fish weighing 10g. 4. Within each of four size classes there is a linear relationship between V·o2s.r. and V·o2max, the slope of the relationship always being greater than one and increasing with the weight of the fish from 1.1 in the sac fry to 5.3 in the 3–7g size class. That is, in the larger size class each increase in the steady rate of oxygen consumption by one unit adds 5.3 units to the aerobic scope for activity. 5. It is speculated that routine and active rate of metabolism are related by a constant factor of expansion so that, up to a limiting value, an increase of the former will lead to an increase of the amount of oxygen available to each fish for additional locomotor activity.


2006 ◽  
Vol 3 (1) ◽  
pp. 100-103 ◽  
Author(s):  
James F Gillooly ◽  
Andrew P Allen

Debate on the mechanism(s) responsible for the scaling of metabolic rate with body size in mammals has focused on why the maximum metabolic rate ( ) appears to scale more steeply with body size than the basal metabolic rate (BMR). Consequently, metabolic scope, defined as /BMR, systematically increases with body size. These observations have led some to suggest that and BMR are controlled by fundamentally different processes, and to discount the generality of models that predict a single power-law scaling exponent for the size dependence of the metabolic rate. We present a model that predicts a steeper size dependence for than BMR based on the observation that changes in muscle temperature from rest to maximal activity are greater in larger mammals. Empirical data support the model's prediction. This model thus provides a potential theoretical and mechanistic link between BMR and .


2002 ◽  
Vol 8 (9) ◽  
pp. 924-929 ◽  
Author(s):  
Gert E. Olsson ◽  
Neil White ◽  
Clas Ahlm ◽  
Fredrik Elgh ◽  
Ann-Christin Verlemyr ◽  
...  

2005 ◽  
Vol 134 (4) ◽  
pp. 830-836 ◽  
Author(s):  
H. KALLIO-KOKKO ◽  
J. LAAKKONEN ◽  
A. RIZZOLI ◽  
V. TAGLIAPIETRA ◽  
I. CATTADORI ◽  
...  

The spatial and temporal distribution of hantavirus and arenavirus antibody-positive wild rodents in Trentino, Italy, was studied using immunofluorescence assays (IFA) in two long-term sites trapped in 2000–2003, and six other sites trapped in 2002. The overall hantavirus seroprevalence in the bank voles, Clethrionomys glareolus (n=229) screened for Puumala virus (PUUV) antibodies was 0·4%, and that for Apodemus flavicollis mice (n=1416) screened for Dobrava virus (DOBV) antibodies was 0·2%. Antibodies against lymphocytic choriomeningitis virus (LCMV) were found in 82 (5·6%) of the 1472 tested rodents; the seroprevalence being 6·1% in A. flavicollis (n=1181), 3·3% in C. glareolus (n=276), and 14·3% in Microtus arvalis (n=7). Of the serum samples of 488 forestry workers studied by IFA, 12 were LCMV-IgG positive (2·5%) and one DOBV-IgG positive (0·2%), however, the latter could not be confirmed DOBV-specific with a neutralization assay. Our results show a widespread distribution but low prevalence of DOBV in Trentino, and demonstrate that the arenavirus antibodies are a common finding in several other rodent species besides the house mouse.


1993 ◽  
Vol 8 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Michŀ Kozakiewicz ◽  
Anna Kozakiewicz ◽  
Aleksy Łukowski ◽  
Tomasz Gortat

1998 ◽  
Vol 244 (1) ◽  
pp. 119-122 ◽  
Author(s):  
S. A. Bull ◽  
R. M. Chalmers ◽  
A. P. Sturdee ◽  
T. D. Healing

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