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Keywords: Seasonality
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Journal Articles
J Exp Biol (2020) 223 (20): jeb230987.
Published: 21 October 2020
...Laura van Rosmalen; Jayme van Dalum; David G. Hazlerigg; Roelof A. Hut ABSTRACT To optimally time reproduction, seasonal mammals use a photoperiodic neuroendocrine system (PNES) that measures photoperiod and subsequently drives reproduction. To adapt to late spring arrival at northern latitudes, a...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (19): jeb231902.
Published: 08 October 2020
... temperatures. To explore context-dependent effects, we replicated these treatments across two seasonal regimes: relatively cool temperatures from nests constructed early in the season and warm temperatures from late-season nests. We show that natural thermal fluctuations have a relatively small effect on...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (12): jeb221853.
Published: 23 June 2020
... seasonal changes in body temperature regulation is little explored. Here, we present novel data on the regulation of avian body temperature to investigate how birds alter mechanisms of heat production and heat conservation to deal with variation in ambient conditions. We subjected dark-eyed juncos ( Junco...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (9): jeb218768.
Published: 04 May 2020
...Erin D. Treanore; Jacklyn M. Kiner; Mackenzie E. Kerner; Etya Amsalem ABSTRACT Insects maximize their fitness by exhibiting predictable and adaptive seasonal patterns in response to changing environmental conditions. These seasonal patterns are often expressed even when insects are kept in...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (8): jeb218826.
Published: 14 April 2020
...Ana Gabriela Jimenez; Emily Cornelius Ruhs; Kailey J. Tobin; Katie N. Anderson; Audrey Le Pogam; Lyette Regimbald; François Vézina ABSTRACT Seasonal changes in maximal thermogenic capacity ( M sum ) in wild black-capped chickadees suggests that adjustments in metabolic performance are slow and...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (6): jeb201517.
Published: 25 March 2020
... carinatus , was introduced to the USA in the 1940s and is now established in southern Florida. We measured bite force and the thermal sensitivity of sprinting of L. carinatus during the winter and spring to determine how morphology and performance varied seasonally. We found evidence of seasonal variation...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (3): jeb212548.
Published: 31 January 2020
...Clarissa C. Ren; Kristyn E. Sylvia; Kathleen M. Munley; Jessica E. Deyoe; Sarah G. Henderson; Michael P. Vu; Gregory E. Demas ABSTRACT Seasonally breeding animals undergo shifts in physiology and behavior in response to changes in photoperiod (day length). Interestingly, some species, such as...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (12): jeb201855.
Published: 24 June 2019
...Ana Gabriela Jimenez; Erin S. O'Connor; Karl J. Brown; Christopher W. Briggs ABSTRACT Resident birds in temperate zones respond to seasonally fluctuating temperatures by adjusting their physiology, such as changes in basal metabolic rate or peak metabolic rate during cold exposure, or altering...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (20): 3664–3669.
Published: 15 October 2014
... defense by altering the abundance of melanin pathway components (a hypothesis we refer to as thermoregulatory-dependent immune investment). This may be the case in the cricket Allonemobius socius , where warm environments (both seasonal and geographical) produced crickets with lighter cuticles and...
Journal Articles
J Exp Biol (2013) 216 (21): 4005–4010.
Published: 01 November 2013
... immune-related phenoloxidase activity increase with latitude. However, thermal environments vary seasonally as well as geographically, suggesting that seasonal plasticity in immunity may also exist. Although seasonal fluctuations in vertebrate immune function are common (because of flux in breeding or...
Journal Articles
J Exp Biol (2012) 215 (16): 2891–2897.
Published: 15 August 2012
...Laura Vesala; Tiina S. Salminen; Vladimir Koštál; Helena Zahradníčková; Anneli Hoikkala SUMMARY Coping with seasonal changes in temperature is an important factor underlying the ability of insects to survive over the harsh winter conditions in the northern temperate zone, and only a few...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (12): 2013–2021.
Published: 15 June 2012
... mechanisms of population persistence during the dry season are not yet known, targeting dry season mosquitoes could provide opportunities for vector control. In the Sahel, it appears likely that M-form A. gambiae survive by aestivation (entering a dormant state). To assess the role of eco-physiological...
Includes: Supplementary data
Journal Articles
J Exp Biol (2011) 214 (14): 2345–2353.
Published: 15 July 2011
... composition of these malaria vectors varies spatially and temporally throughout the region and is thought to be linked to environmental factors such as rainfall, larval site characteristics and duration of the dry season. To examine possible physiological divergence between these taxa, we measured metabolic...
Journal Articles
J Exp Biol (2009) 212 (9): 1259–1269.
Published: 01 May 2009
...Barbara Helm; Ingrid Schwabl; Eberhard Gwinner SUMMARY To anticipate seasonal change, organisms schedule their annual activities by using calendrical cues like photoperiod. The use of cues must be fitted to local conditions because schedules differ between species and habitats. In complete absence...
Includes: Supplementary data
Journal Articles
J Exp Biol (2006) 209 (16): 3062–3070.
Published: 15 August 2006
...Noah T. Owen-Ashley; John C. Wingfield SUMMARY A variety of vertebrate species modulate immune function on a seasonal basis to cope with seasonal energy deficits and competing life-history demands, such as reproduction. Most studies to date have focused upon seasonal variation of cellular and...