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Keywords: Phenotypic flexibility
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Journal Articles
J Exp Biol (2021) 224 (20): jeb243057.
Published: 22 October 2021
... Reaction norms can be used to simultaneously quantify both the level of phenotypic flexibility across an environmental gradient (i.e. reaction norm slope) and the phenotypic expression of a trait in the population-average environment (i.e. reaction norm intercept). Reaction norm components of several...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (3): jeb234708.
Published: 3 February 2021
... acquisition: W.H.K., E.C.-V. Summary: Phenotypic flexibility that is fast but not too fast: modulation of intestinal peptidase to match altered dietary protein level in nestling house sparrows involves parallel change in aminopeptidase-N activity and mRNA. Aminopeptidase-N Enzyme activity mRNA...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (6): jeb171827.
Published: 19 March 2018
.... Digestive enzymes Transcriptional control Phenotypic flexibility Major changes in intestinal enzymes occur during development in vertebrates, but only in mammals are the associated transcriptional responses well described, based on studies in about a dozen species ( Karasov and Douglas, 2013...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (17): 3154–3161.
Published: 1 September 2017
..., are responsible for the seasonal decrease in phenotypic flexibility of energy metabolism in photoresponsive mammals. To quantify reaction norms for basal metabolic rate (BMR) and cortisol (CORT) secretion, male Siberian hamsters maintained at a long (16 h:8 h light:dark) photoperiod were acclimated repeatedly...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (15): 2733–2742.
Published: 1 August 2017
...://www.biologists.com/user-licence-1-1/ Summary: House sparrows quickly adjust to new diets with differing protein and carbohydrate content when they are less than a week old. Digestive physiology Development Phenotypic flexibility Invasion biology Feeding ecology Passer domesticus Of all...
Journal Articles
J Exp Biol (2016) 219 (20): 3204–3207.
Published: 15 October 2016
... locomotory performance, even in the absence of exercise training. Exercise performance Muscle remodelling Phenotypic flexibility Invasion of land Effective locomotion both in water and on land requires many physiological and behavioural changes in order to cope with the decreased viscosity...
Journal Articles
J Exp Biol (2016) 219 (12): 1903–1912.
Published: 15 June 2016
... are fixed or perhaps phenotypically flexible as a result of diet. Here, we maintained a naturally omnivorous lizard, Liolaemus ruibali , on a mixed diet of 50% insects and 50% plant material, or a plant-rich diet of 90% plant material. We compared parameters of digestive performance, gut morphology...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (24): 3885–3893.
Published: 1 December 2015
... and exercise training in house sparrows increase trans-sarcolemmal and intramyocyte lipid transport capacities and cellular metabolic intensities associated with elevated shivering thermogenesis and exercise capacities. Phenotypic flexibility Cold training Exercise training Fatty acid translocase...
Journal Articles
J Exp Biol (2015) 218 (14): 2190–2200.
Published: 1 July 2015
... exhibits phenotypic flexibility with migration, but not latitude in a neotropical migrant, Parkesia noveboracensis . J. Ornithol.   156 , 547 - 550 . 10.1007/s10336-015-1157-x Dawson , W. R. and Marsh , R. L. ( 1989 ). Metabolic acclimatization to cold and season in birds...
Journal Articles
J Exp Biol (2015) 218 (5): 767–777.
Published: 1 March 2015
... signatures indicating enhanced oxygen delivery and increased transport and β-oxidation of fatty acids. Phenotypic flexibility Seasonal adjustments Winter acclimatization Transcriptomics Phenotypic flexibility is an organism's ability to reversibly modify its phenotype with respect to changes...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (9): 1510–1518.
Published: 1 May 2014
... of a widespread songbird, the stonechat ( Saxicola torquata ). We compared variation in immunity during 1 year in long-distance migrants, short-distance migrants, tropical residents and hybrids in a common garden environment. Additionally, we investigated phenotypically flexible responses to temperature...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (8): 1363–1369.
Published: 15 April 2014
.... 15 10 2013 10 12 2013 © 2014. Published by The Company of Biologists Ltd 2014 Acclimatisation Cold exposure Helox Phenotypic flexibility Thermogenic capacity The lowest environmental temperature to which an endotherm can defend normothermic body temperature ( T b...
Journal Articles
J Exp Biol (2014) 217 (6): 866–875.
Published: 15 March 2014
...David Swanson; Yufeng Zhang; Jin-Song Liu; Christopher L. Merkord; Marisa O. King Seasonal phenotypic flexibility in small birds produces a winter phenotype with elevated maximum cold-induced metabolic rates (=summit metabolism, Ṁ sum ). Temperature and photoperiod are candidates for drivers...
Journal Articles
J Exp Biol (2013) 216 (21): 3981–3987.
Published: 1 November 2013
... of Biologists Ltd 2013 phenotypic flexibility digestive enzymes house sparrow ecological physiology ontogeny Morphology and physiology of the gastrointestinal tract show several adaptations to different food types, habitats and life strategies (reviewed in Karasov and Hume, 1997 ; Starck...
Journal Articles
J Exp Biol (2011) 214 (17): 2823–2831.
Published: 1 September 2011
... of the typical myostatin, suggesting that they have no functional importance and may be mistakes of the splicing machinery. We conclude that IGF1 is likely to be an important mediator of muscle phenotypic flexibility during acute exercise and during endogenous, seasonal preparation for migration. The role...
Journal Articles
J Exp Biol (2011) 214 (16): 2755–2760.
Published: 15 August 2011
... day old birds was not influenced by diet composition prior to day 12 but instead depended only on diet that was fed between days 12 and 30. We conclude that plasticity in the activity of intestinal disaccharidases in house sparrow nestlings represents completely reversible phenotypic flexibility...
Journal Articles
J Exp Biol (2011) 214 (5): 829–835.
Published: 1 March 2011
...Jorge S. Gutiérrez; José A. Masero; José M. Abad-Gómez; Auxiliadora Villegas; Juan M. Sánchez-Guzmán SUMMARY Many migratory vertebrates typically move between habitats with varying salinities during the annual cycle. These organisms clearly exhibit a remarkable phenotypic flexibility...
Journal Articles
J Exp Biol (2009) 212 (14): 2167–2175.
Published: 15 July 2009
..., which is one of the highest metabolic depressions reported for any ectothermic vertebrate. Our results suggest that amphibian persistence in highly seasonal environments is related to a large capacity of phenotypic flexibility at different organisational levels; an ability that may be related...
Journal Articles
J Exp Biol (2009) 212 (6): 808–814.
Published: 15 March 2009
...Aneta Książek; Jan Czerniecki; Marek Konarzewski SUMMARY Theoretical considerations suggest that one of the main factors determining phenotypic flexibility of the digestive system is the size (mass) of internal organs. To test this, we used mice from two lines selected for high and low levels...
Journal Articles
J Exp Biol (2009) 212 (4): 483–493.
Published: 15 February 2009
... valves and a separate pump for each chamber. * Author for correspondence (e-mail: downs@ukzn.ac.za ) 20 11 2008 © The Company of Biologists Limited 2009 2009 altitudinal variation amethyst sunbird metabolic rates phenotypic plasticity phenotypic flexibility...