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Keywords: activity
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Journal Articles
J Exp Biol (2021) 224 (1): jeb227264.
Published: 12 January 2021
...Miguel Leis; Claudio R. Lazzari ABSTRACT Active searching for vertebrate blood is a necessary activity for haematophagous insects, and it can be assumed that this search should also be costly in terms of energetic expenditure. Whether by swimming, walking, running or flying, active movement...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (21): jeb231993.
Published: 03 November 2020
... mechanisms could facilitate mass regulation in birds. Birds could regulate body mass by adjusting food intake (dieting), activity, baseline energetic requirements (basal metabolic rate), mitochondrial efficiency or assimilation efficiency. Here, we present the results of two experiments in captive red knots...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (10): jeb222232.
Published: 22 May 2020
...Simon Tapper; Joseph J. Nocera; Gary Burness ABSTRACT Climatic warming is predicted to increase the frequency of extreme weather events, which may reduce an individual's capacity for sustained activity because of thermal limits. We tested whether the risk of overheating may limit parental...
Journal Articles
J Exp Biol (2019) 222 (23): jeb211136.
Published: 05 December 2019
...., 2006 ) and activity budgets ( Elliott et al., 2013 ; Fehlmann et al., 2017 ), magnetometer data to recreate the animal's path using dead reckoning ( Bidder et al., 2015 ), and GPS data to geographically reference behaviors ( Weimerskirch et al., 2009 ). While bio-loggers are powerful tools...
Journal Articles
J Exp Biol (2019) 222 (11): jeb193433.
Published: 05 June 2019
... trait variation. Yet, the extent to which TPCs vary temporally and across traits is rarely considered in assessments of climate change responses. Using a common garden approach, we estimated TPCs for standard metabolic rate (SMR), and activity in Drosophila melanogaster at three test temperatures (16...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (17): jeb169433.
Published: 10 September 2018
...Tony D. Williams ABSTRACT Parental care is assumed to be costly in that it requires sustained, high-intensity activity sufficient to cause costs of reproduction (decreased survival and future fecundity of parents). Costs of reproduction are, in turn, thought to have a physiological basis where...
Journal Articles
J Exp Biol (2017) 220 (9): 1684–1692.
Published: 01 May 2017
...Ingrid van der Merwe; Maria K. Oosthuizen; Andre Ganswindt; Abraham Haim; Nigel C. Bennett ABSTRACT Effects of photophase illuminance (1, 10, 100 and 330 lx of white incandescent lighting) on daily rhythms of locomotor activity, urine production and 6-sulfatoxymelatonin (6-SMT; 10 versus 330 lx...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (8): 1472–1480.
Published: 15 April 2017
...Geoffrey T. Broadhead; Trisha Basu; Martin von Arx; Robert A. Raguso ABSTRACT Circadian patterns of activity are considered ubiquitous and adaptive, and are often invoked as a mechanism for temporal niche partitioning. Yet, comparisons of rhythmic behavior in related animal species are uncommon...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (2): 220–226.
Published: 15 January 2017
... expression in a small forest-dwelling marsupial, the yellow-footed antechinus ( Antechinus flavipes ), because like other animals that live in fire-prone habitats they must effectively respond to fires to ensure survival. Activity and body temperature patterns of individuals in outdoor aviaries were measured...
Journal Articles
J Exp Biol (2016) 219 (12): 1808–1819.
Published: 15 June 2016
... with exogenous glycerol and GABA demonstrated altered water-balance characteristics; specifically, increased water absorption at high relative humidity. Finally, we observed changes in locomotor activity in response to dehydration, but this change was not influenced by the accumulation of GABA. Overall...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (22): 3570–3579.
Published: 01 November 2015
...Alexander G. S. Jackson; Szu-Yun Leu; Neil B. Ford; James W. Hicks ABSTRACT Snakes exhibit large factorial increments in oxygen consumption during digestion and physical activity, and long-lasting sub-maximal increments during reproduction. Under natural conditions, all three physiological states...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (23): 4326–4333.
Published: 01 December 2013
... by providing a cool environment would allow them to dissipate more heat, take in more food, generate more milk and hence wean heavier litters. We measured maternal energy budgets and monitored time courses of core body temperature and physical activity. To minimise the variance in energy budgets, all litters...
Journal Articles
J Exp Biol (2013) 216 (12): 2316–2327.
Published: 15 June 2013
... of Biologists Ltd 2013 reproductive performance pregnancy heat dissipation limitation programming food intake activity growth body temperature The maximal rates of energy metabolism that animals can sustain for protracted periods provide an upper limit constraining many aspects of animal...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (12): 2328–2338.
Published: 15 June 2013
..., food intake may be limited in late pregnancy by competition for space in the abdomen between the alimentary tract and fetuses. Hence, females may need to compensate their energy budgets during pregnancy by reducing activity and lowering body temperature. We explored the relationships between energy...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (11): 1982–1990.
Published: 01 June 2013
... leucophrys . Using field data from a long-term study, we first evaluated the relationship between barometric pressure, storms and stress physiology in free-living white-crowned sparrows. We then manipulated barometric pressure experimentally in the laboratory and determined how it affects activity, food...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (10): 1793–1798.
Published: 15 May 2013
...Samuel J. Geiseler; Arnoldus S. Blix; Jennifer M. Burns; Lars P. Folkow SUMMARY Hooded seals ( Cystophora cristata ) rely on large stores of oxygen, either bound to hemoglobin or myoglobin (Mb), to support prolonged diving activity. Pups are born with fully developed hemoglobin stores, but their Mb...
Journal Articles
J Exp Biol (2013) 216 (7): 1255–1264.
Published: 01 April 2013
...) tags now provide the means to remotely identify and quantify behavioural states and rates such as resting, swimming and migrating, and to estimate activity and energy budgets. Most studies use low-frequency (≤32 Hz) accelerometer sampling because of battery and data-archiving constraints. In this study...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (3): 515–523.
Published: 01 February 2013
... , Morgan   M. T. , Swallow   J. G. , Rhodes   J. S. , Girard   I. , Belter   J. G. , Carter   P. A. ( 2002 ). Evolution of a small-muscle polymorphism in lines of house mice selected for high activity levels . Evolution   56 , 1267 - 1275 . Garland   T.   Jr , Kelly   S...
Journal Articles
J Exp Biol (2013) 216 (3): 369–378.
Published: 01 February 2013
... conditions; the [Hb] of hypoxia-exposed individuals was 8% lower than that of normoxic individuals ( t =−2.14, P <0.05). Furthermore, only LDH activity in the red skeletal muscle was different between hypoxia- and normoxia-acclimated fish; all other enzyme activities were similar ( Table 3...
Journal Articles
J Exp Biol (2013) 216 (1): 56–66.
Published: 01 January 2013
...Kevin D. Lafferty; Jenny C. Shaw Summary Parasites affect host behavior in several ways. They can alter activity, microhabitats or both. For trophically transmitted parasites (the focus of our study), decreased activity might impair the ability of hosts to respond to final-host predators...