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Keywords: Fasting
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Journal Articles
J Exp Biol jeb.243142.
Published: 08 October 2021
..., and therefore we investigated mitochondrial function plasticity in these states. Herein we compared liver mitochondrial bioenergetics of the boid snake Boa constrictor during fasting and after meal intake. We fasted the snakes for 60 days, and then we fed a subgroup with 30% of their body size and evaluated...
Journal Articles
J Exp Biol jeb.243062.
Published: 04 October 2021
... 29 9 2021 © 2021. Published by The Company of Biologists Ltd 2021 http://www.biologists.com/user-licence-1-1/ Dolphin Fasting Ketogenesis National Institutes of Health https://dx.doi.org/10.13039/100000002 R01DK120530 Functional loss of ketogenesis in odontocete...
Journal Articles
J Exp Biol (2019) 222 (1): jeb184895.
Published: 01 January 2019
... associated with extended fasting. Overall, the capital–income breeding concept applies equally to male reproduction, but compared with females, there are different physical and physiological constraints that shape choice of strategy. This Commentary also highlights some key future areas that need...
Journal Articles
J Exp Biol (2017) 220 (23): 4330–4338.
Published: 01 December 2017
... and subsequent generations protection from future starvation events. Bioenergetics Diet Epigenetics Fasting Nutrition Weight loss Limitation in the availability of food is an omnipresent challenge faced by many animal populations. The durations of these events can be brief, and cause...
Journal Articles
J Exp Biol (2017) 220 (13): 2380–2386.
Published: 01 July 2017
... prone to using facultative heterothermy than generalists. We tested this hypothesis at the intraspecific level using male laboratory mice (C57BL/cmdb) fasted under different thermal conditions (20 and 10°C) and for different time periods (12–48 h). We predicted that variability of body temperature ( T b...
Journal Articles
J Exp Biol (2017) 220 (12): 2196–2202.
Published: 15 June 2017
... that this species resembles bears in the preservation of bone mass and biomechanical properties during prolonged passivity and catabolism. This longitudinal study examined the osteological properties of tibiae in farm-bred raccoon dogs that were either fed or fasted ( n =6 per group) for a 10 week period...
Journal Articles
J Exp Biol (2017) 220 (5): 837–843.
Published: 01 March 2017
... , G. ( 2010 ). Hypothalamic integration of portal glucose signals and control of food intake and insulin sensitivity . Diabetes Metab.   36 , 257 - 262 . 10.1016/j.diabet.2010.05.001 Diano , S. , Naftolin , F. , Goglia , F. and Horvath , T. L. ( 1998 ). Fasting-induced...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (2): 237–246.
Published: 15 January 2017
... and attempted to replicate these in non-parasitized fish by exposing them to treatments including immunity activation and fasting, or by pharmacologically inhibiting the stress axis. All fish were screened for the following behaviours: activity, water depth preference, sociability, phototaxis, anti-predator...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (11): 1686–1692.
Published: 01 June 2015
... fasting and decreased body condition during this period ( Hood et al., 1998 ) (see below). In king penguins, parents increase the frequency of foraging trips during chick-rearing ( Weimerskirch et al., 1992 ) to meet the energy requirements of their growing offspring. As foraging comes at a substantial...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (20): 3700–3707.
Published: 15 October 2014
... the energy stores of flamingos found dead in February 2012, and compared them with those found in other bird species exposed to cold spells and/or fasting. Second, we evaluated the monthly energy requirements of flamingos across 1980–2012 using the mechanistic model Niche Mapper™. Our results show...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (17): 3015–3027.
Published: 01 September 2014
...Jeroen Brijs; Grant W. Hennig; Michael Axelsson; Catharina Olsson This is the first study to catalogue the diverse array of in vivo motility patterns in a teleost fish and how they are affected by feeding. Video recordings of exteriorised proximal intestine from fasted and fed shorthorn sculpin...
Journal Articles
J Exp Biol (2012) 215 (19): 3354–3361.
Published: 01 October 2012
...Trixie N. Lee; C. Loren Buck; Brian M. Barnes; Diane M. O’Brien SUMMARY We describe two models explaining the increase in tissue nitrogen isotope ratios (δ 15 N) that occurs during fasting in animals. The catabolic model posits that protein breakdown selectively removes the lighter isotope...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (15): 2637–2645.
Published: 01 August 2012
... and patterns of nutrient deposition during development. In species that undergo extended fasts during development, metabolic strategies for fuel use have the potential to influence future reproductive success by directly impacting somatic growth and acquisition of traits required for successful breeding. We...
Journal Articles
J Exp Biol (2012) 215 (14): 2455–2464.
Published: 15 July 2012
...Jose Abraham Viscarra; José Pablo Vázquez-Medina; Ruben Rodriguez; Cory D. Champagne; Sean H. Adams; Daniel E. Crocker; Rudy M. Ortiz SUMMARY The northern elephant seal pup ( Mirounga angustirostris ) undergoes a 2–3 month post-weaning fast, during which it depends primarily on the oxidation...
Journal Articles
J Exp Biol (2012) 215 (3): 508–517.
Published: 01 February 2012
... hydrodynamic radius. Response patterns were similar in seawater and freshwater preparations, though water absorption and PEG-900 permeability were greater in the latter. Despite up to 4-fold variations in absorptive water flux associated with feeding and fasting (highest at 1–3 h, lowest at 12–24 h...
Journal Articles
J Exp Biol (2010) 213 (14): 2524–2530.
Published: 15 July 2010
...José Pablo Vázquez-Medina; Daniel E. Crocker; Henry Jay Forman; Rudy M. Ortiz SUMMARY Elephant seals are naturally adapted to survive up to three months of absolute food and water deprivation (fasting). Prolonged food deprivation in terrestrial mammals increases reactive oxygen species (ROS...
Journal Articles
J Exp Biol (2010) 213 (1): 153–160.
Published: 01 January 2010
... is the first involving undisturbed animals, and determines the EE/ f H relationship in naturally fasting and freely incubating or captivity-acclimatized male and female king penguins. EE determination was based on (1) the measurement of body mass loss during periods of phase II fasting, and (2) the calculation...
Journal Articles
J Exp Biol (2009) 212 (22): 3656–3663.
Published: 15 November 2009
... intestine fasting Cyclorana alboguttata Na + /K + -ATPase activity protein synthesis l -proline uptake The functional small intestine (SI) has a disproportionately large energetic demand relative to other organs( Cant et al., 1996 ) and consequently, for those animals that experience...
Journal Articles
J Exp Biol (2009) 212 (16): 2635–2644.
Published: 15 August 2009
... were conducted for turtles in both fed and fasted states. Respiratory exchange ratio (RER) was determined in a dry respirometer and used to calculate energy expenditure. For fed and fasted turtles, total body water (TBW) was 66.67±3.37% and 58.70±7.63% of body mass, and water flux rates were 9.57±1.33...
Journal Articles
J Exp Biol (2009) 212 (14): 2167–2175.
Published: 15 July 2009
... for amphibians that hibernate on land. Accordingly, in the Andean toad( Bufo spinulosus ), we investigated the effect of short-term fasting and hibernation on the hydrolytic activity of digestive enzymes, histology of the small intestine, gross morphology of digestive and other internal organs and standard...