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Keywords: repeatability
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Journal Articles
J Exp Biol jeb.243057.
Published: 09 September 2021
... physiological processes, there are few data on how much variation in T b exists within populations of organisms, and whether this variation consistently differs among individuals over time (i.e., repeatability of a trait). Here, using thermal radio-frequency identification implants, we quantified...
Journal Articles
J Exp Biol (2020) 223 (20): jeb161828.
Published: 27 October 2020
... traits, both within and among species. We use simulated data to illustrate best practices when sampling a large number of voluntary maneuvers. Our results show how the sample average can be the best measure of inter-individual variation, whereas the sample maximum is neither repeatable nor a useful...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (6): jeb197152.
Published: 15 March 2019
... by natural selection. We studied the consistency of individual heterothermic responses to environmental challenges in a single population of yellow-necked mice ( Apodemus flavicollis ), by verifying the hypothesis that T b variation is a repeatable trait. To induce the heterothermic response, the same...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (24): jeb188722.
Published: 12 December 2018
... the mechanisms underlying this behavioral variation in exploratory behavior and determine its implications for the ecology of this species. We first establish that individual variation in exploratory behavior is repeatable and consistent across situations. We then show a relationship between exploratory behavior...
Journal Articles
J Exp Biol (2017) 220 (18): 3280–3289.
Published: 15 September 2017
... © 2017. Published by The Company of Biologists Ltd 2017 http://www.biologists.com/user-licence-1-1/ Summary: Individual differences in cold response mean that minimal energy expenditure can be better quantified at ecologically relevant ambient temperatures. BMR SMR Repeatability...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (24): 3832–3843.
Published: 15 December 2016
...Dominique G. Roche; Vincent Careau; Sandra A. Binning ABSTRACT Animal ‘personality’, defined as repeatable inter-individual differences in behaviour, is a concept in biology that faces intense controversy. Critics argue that the field is riddled with terminological and methodological...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (4): 536–544.
Published: 15 February 2014
...Charles-A. Darveau; Fannie Billardon; Kasandra Bélanger The evolution of flight energetics requires that phenotypes be variable, repeatable and heritable. We studied intraspecific variation in flight energetics in order to assess the repeatability of flight metabolic rate and wingbeat frequency...
Journal Articles
J Exp Biol (2011) 214 (19): 3186–3196.
Published: 01 October 2011
... and strong intermale sexual competition. We tested for repeatability of mass and , differences among age and sex classes, and effects of several condition indices. In adult males, we examined interactions between aerobic performance and bower ownership (required for male mating success...
Journal Articles
J Exp Biol (2011) 214 (18): 3102–3110.
Published: 15 September 2011
... was significantly repeatable over five sequential responses at 30 min intervals, and also repeatable after a 30 day interval for most of the components. This indicates that the variation is intrinsic to the individuals, but there was no evidence for trade-offs amongst the components of the response, suggesting...
Journal Articles
J Exp Biol (2011) 214 (10): 1668–1675.
Published: 15 May 2011
... aerobic scope (AAS). Previous studies on fish have found SMR to closely correlate with dominance and position in the social hierarchy, and to be highly repeatable over time when fish were provided an ad libitum diet. In this study we tested the temporal repeatability of individual SMR, AMR and AAS...
Journal Articles
J Exp Biol (2010) 213 (1): 26–32.
Published: 01 January 2010
...S. Marras; G. Claireaux; D. J. McKenzie; J. A. Nelson SUMMARY Studies of inter-individual variation in fish swimming performance may provide insight into how selection has influenced diversity in phenotypic traits. We investigated individual variation and short-term repeatability of individual...
Journal Articles
J Exp Biol (2009) 212 (2): 297–304.
Published: 15 January 2009
...Pablo Cortés; Silvia A. Quijano; Roberto F. Nespolo SUMMARY In evolutionary physiology, studies of inter-individual variation (i.e. repeatability) in functional capacities are valuable as they indicate –within populations – what attributes could respond to natural selection. Although repeatability...
Journal Articles
J Exp Biol (2008) 211 (8): 1336–1343.
Published: 15 April 2008
...,indicating no training or fatigue effects. About 50% of the overall variation in speed at each temperature was due to intraindividual variation. While speed was repeatable, repeatability decreased slightly with increasing separation between trials. Speeds at 20°C and 35°C were positively correlated...
Journal Articles
J Exp Biol (2007) 210 (11): 2000–2005.
Published: 01 June 2007
...Roberto F. Nespolo; Marcela Franco SUMMARY Repeatability studies are gaining considerable interest among physiological ecologists, particularly in traits affected by high environmental/residual variance, such as whole-animal metabolic rate (MR). The original definition of repeatability, known...
Journal Articles
J Exp Biol (2007) 210 (1): 97–106.
Published: 01 January 2007
... variation, with a low but significant repeatability of 0.113. The within-individual BMR variation of up to 26% that we observed in laughing doves reveals that BMR is a highly flexible trait in this species, and reiterates the need to take phenotypic plasticity into account in comparative analyses of avian...
Journal Articles
J Exp Biol (2006) 209 (16): 3141–3154.
Published: 15 August 2006
..., Å. ( 2001 ). Basal metabolic rate in migratory waders: intra-individual, intraspecific,interspecific and seasonal variation. Funct. Ecol . 15 , 465 -473. Lessells, C. M. and Boag, P. T. ( 1987 ). Unrepeatable repeatabilities: a common mistake. Auk 104 , 116 -121. Liknes, E. T...
Journal Articles
J Exp Biol (2005) 208 (24): 4663–4669.
Published: 15 December 2005
...Bernt Rønning; Børge Moe; Claus Bech SUMMARY Basal metabolic rate (BMR) is a physiological trait believed to show adaptational changes. Few studies have tested whether BMR shows stable between-individual variations. Repeatability indicates that the trait might be heritable and therefore a possible...
Journal Articles
J Exp Biol (2005) 208 (13): 2533–2538.
Published: 01 July 2005
... is repeatable over periods of at least 8-10 months, i.e. individual variation in RMR remained constant over time for any given physiological state. This suggests that the metabolic cost of egg formation should respond to selection. However, we also show that in males, but not females, repeatability of RMR...
Journal Articles
J Exp Biol (2004) 207 (2): 295–305.
Published: 15 January 2004
... physiology changes throughout acclimation, and how individuals vary in their response to acclimation, remain poorly understood. Here we describe a high temporal-resolution study of cold acclimation in the deer mouse Peromyscus maniculatus . The experimental design was based on repeated measures at short...
Journal Articles
J Exp Biol (2003) 206 (23): 4309–4315.
Published: 01 December 2003
...R. F. Nespolo; M. A. Lardies; F. Bozinovic SUMMARY Studies focusing on physiological variation among individuals, and its possible evolutionary consequences, are scarce. A trait can only be a target of natural selection if it is consistent over time, that is, a trait must be repeatable...