Találati lista | Tudóstér

1.

001-es BibID:	BIBFORM107992
035-os BibID:	(cikkazonosító)160740 (Wos)000391731800024 (Scopus)85006298203
Első szerző:	Akcay, Caglar
Cím:	Strategic adjustment of parental care in tree swallows: life-history trade-offs and the role of glucocorticoids / Çağlar Akçay, Ádám Z. Lendvai, Mark Stanback, Mark Haussmann, Ignacio T. Moore, Fran Bonier
Dátum:	2016
ISSN:	2054-5703
Megjegyzések:	Life-history theory predicts that optimal strategies of parental investment will depend on ecological and social factors, such as current brood value and offspring need. Parental care strategies are also likely to be mediated in part by the hypothalamic- pituitary-adrenal axis and glucocorticoid hormones. Here, we present an experiment in tree swallows (Tachycineta bicolor), a biparental songbird with wide geographical distribution, asking whether parental care is strategically adjusted in response to signals of offspring need and brood value and if so, whether glucocorticoids are involved in these adjustments. Using an automated playback system, we carried out playbacks of nestling begging calls specifically to females in two populations differing in their brood value: a northern population in Ontario, Canada (relatively higher brood value) and a southern population in North Carolina, USA (relatively lower brood value). We quantified female offspring provisioning rates before and during playbacks and plasma corticosterone levels (cort) once during late incubation and once immediately after playbacks. Females in both populations increased feeding rates temporarily during the first 2 h of playback but the increase was not sustained for the entire duration of playback (6 h). Cort levels from samples at the end of the playback did not differ between control females and females that received playbacks. However, females that had higher increases in cort between the incubation and nestling period had greater fledging success. These results suggest that females are able to strategically respond to offspring need, although the role of glucocorticoids in this strategic adjustment remains unclear.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk corticosterone nestling begging provisioning brood value latitude fitness
Megjelenés:	Royal Society Open Science. - 3 : 12 (2016), p.1-12. -
További szerzők:	Lendvai Ádám Zoltán (1977-) (biológus) Stanback, Mark Haussmann, Mark F. Moore, Ignacio T. Bonier, Frances
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

2.

001-es BibID:	BIBFORM104074
035-os BibID:	(WoS)000465433600011 (Scopus)85062854839 (cikkazonosító)20190018
Első szerző:	Cox, Amelia R.
Cím:	Rainy springs linked to poor nestling growth in a declining avian aerial insectivore (Tachycineta bicolor) / Amelia R. Cox, Raleigh J. Robertson, Ádám Z. Lendvai, Kennedy Everitt, Frances Bonier
Dátum:	2019
ISSN:	0962-8452
Megjegyzések:	As species shift their ranges and phenology to cope with climate change, many are left without a ready supply of their preferred food source during critical life stages. Food shortages are often assumed to be driven by reduced total food abundance, but here we propose that climate change may cause short-term food shortages for foraging specialists without affecting overall food availability. We frame this hypothesis around the special case of birds that forage on flying insects for whom effects mediated by their shared food resource have been proposed to cause avian aerial insectivores' decline worldwide. Flying insects are inactive during cold, wet or windy conditions, effectively reducing food availability to zero even if insect abundance remains otherwise unchanged. Using long-term monitoring data from a declining population of tree swallows (Tachycineta bicolor), we show that nestlings' body mass declined substantially from 1977 to 2017. In 2017, nestlings had lower body mass if it rained during the preceding 3 days, though females increased provisioning rates, potentially in an attempt to compensate. Adult body mass, particularly that of the males, has also declined over the long-term study. Mean rainfall during the nestling period has increased by 9.3+0.3 mm decade21 , potentially explaining declining nestling body mass and population declines. Therefore, we suggest that reduced food availability, distinct from food abundance, may be an important and previously overlooked consequence of climate change, which could be affecting populations of species that specialize on foraging on flying insects.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk tree swallow body condition climate change parental investment insect availability
Megjelenés:	Proceedings Of The Royal Society B-Biological Sciences. - 286 : 1898 (2019), p. 1-8. -
További szerzők:	Robertson, Raleigh J. Lendvai Ádám Zoltán (1977-) (biológus) Everitt, Kennedy Bonier, Frances
Pályázati támogatás:	OTKA-113108 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

3.

001-es BibID:	BIBFORM107993
035-os BibID:	(WoS)000382245200001 (Scopus)84982102933
Első szerző:	Dakin, Roslyn
Cím:	Weather matters: begging calls are temperatureand size-dependent signals of offspring state / Dakin, Roslyn, Ouyang, Jenny Q., Lendvai, Ádám Z., Haussmann, Mark F., Moore, Ignacio T., Bonier, Frances
Dátum:	2016
ISSN:	0005-7959 1568-539X
Megjegyzések:	Begging calls provide a way for parents to gauge offspring state. Although temperature is known to affect call production, previous studies have not examined the influence of ambient temperature at the nest. We recorded ambient temperature and begging calls of 3 day-old tree swallows (Tachycineta bicolor). Our results indicate that typical daily temperature flux can dramatically alter a brood`s begging calls, depending on body size. Broods with small (low body mass) nestlings decreased the rate and length of their calls at colder temperatures, consistent with a biophysical constraint. In contrast, broods with large (high body mass) nestlings increased the rate of their calls at colder temperatures. Parents responded in a context-dependent manner, returning more rapidly after smaller nestlings gave longer begging calls. Our results suggest that the function of offspring begging calls is highly dynamic, with environmental conditions altering the relationship between begging calls and offspring state.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk communication solicitation parent-offspring conflict environment honest signal tree swallow
Megjelenés:	Behaviour. - 153 : 8 (2016), p. 871-896. -
További szerzők:	Ouyang, Jenny Q. Lendvai Ádám Zoltán (1977-) (biológus) Haussmann, Mark F. Moore, Ignacio T. Bonier, Frances
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

4.

001-es BibID:	BIBFORM108001
035-os BibID:	(cikkazonosító)e110564 (WOS)000345250400010 (Scopus)84911480326
Első szerző:	Lendvai Ádám Zoltán (biológus)
Cím:	Experimental Food Restriction Reveals Individual Differences in Corticosterone Reaction Norms with No Oxidative Costs / Ádám Z. Lendvai, Jenny Q. Ouyang, Laura A. Schoenle, Vincent Fasanello, Mark F. Haussmann, Frances Bonier, Ignacio T. Moore
Dátum:	2014
ISSN:	1932-6203
Megjegyzések:	Highly plastic endocrine traits are thought to play a central role in allowing organisms to respond rapidly to environmental change. Yet, not all individuals display the same degree of plasticity in these traits, and the costs of this individual variation in plasticity are unknown. We studied individual differences in corticosterone levels under varying conditions to test whether there are consistent individual differences in (1) baseline corticosterone levels; (2) plasticity in the hormonal response to an ecologically relevant stressor (food restriction); and (3) whether individual differences in plasticity are related to fitness costs, as estimated by oxidative stress levels. We took 25 wild-caught house sparrows into captivity and assigned them to repeated food restricted and control treatments (60% and 110% of their daily food intake), such that each individual experienced both food restricted and control diets twice. We found significant individual variation in baseline corticosterone levels and stress responsiveness, even after controlling for changes in body mass. However, these individual differences in hormonal responsiveness were not related to measures of oxidative stress. These results have implications for how corticosterone levels may evolve in natural populations and raise questions about what we can conclude from phenotypic correlations between hormone levels and fitness measures.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk
Megjelenés:	Plos One. - 9 : 11 (2014), p. 1-10. -
További szerzők:	Ouyang, Jenny Q. Schoenle, Laura A. Fasanello, Vincent J. Haussmann, Mark F. Bonier, Frances Moore, Ignacio T.
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

5.

001-es BibID:	BIBFORM107996
035-os BibID:	(cikkazonosító)e0141194 (Wos)000364433100024 (Scopus)84955440104
Első szerző:	Lendvai Ádám Zoltán (biológus)
Cím:	Analysis of the Optimal Duration of Behavioral Observations Based on an Automated Continuous Monitoring System in Tree Swallows (Tachycineta bicolor): Is One Hour Good Enough? / Ádám Z. Lendvai, Çağlar Akçay, Jenny Q. Ouyang, Roslyn Dakin, Alice D. Domalik, Prianka S. St John, Mark Stanback, Ignacio T. Moore1, Frances Bonier
Dátum:	2015
ISSN:	1932-6203
Megjegyzések:	Studies of animal behavior often rely on human observation, which introduces a number of limitations on sampling. Recent developments in automated logging of behaviors make it possible to circumvent some of these problems. Once verified for efficacy and accuracy, these automated systems can be used to determine optimal sampling regimes for behavioral studies. Here, we used a radio-frequency identification (RFID) system to quantify parental effort in a bi-parental songbird species: the tree swallow (Tachycineta bicolor). We found that the accuracy of the RFID monitoring system was similar to that of video-recorded behavioral observations for quantifying parental visits. Using RFID monitoring, we also quantified the optimum duration of sampling periods for male and female parental effort by looking at the relationship between nest visit rates estimated from sampling periods with different durations and the total visit numbers for the day. The optimum sampling duration (the shortest observation time that explained the most variation in total daily visits per unit time) was 1h for both sexes. These results show that RFID and other automated technologies can be used to quantify behavior when human observation is constrained, and the information from these monitoring technologies can be useful for evaluating the efficacy of human observation methods.
Tárgyszavak:	Természettudományok Biológiai tudományok esettanulmány folyóiratcikk
Megjelenés:	Plos One. - 10 : 11 (2015), p. 1-11. -
További szerzők:	Akcay, Caglar Ouyang, Jenny Q. Dakin, Roslyn Domalik, Alice D. St John, Prianka S. Stanback, Mark Moore, Ignacio T. Bonier, Frances
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

6.

001-es BibID:	BIBFORM107999
035-os BibID:	(Cikkazonosító)e877 (WoS)000352300500003 (Scopus)84926501135
Első szerző:	Lendvai Ádám Zoltán (biológus)
Cím:	Low cost audiovisual playback and recording triggered by radio frequency identification using Raspberry Pi / Lendvai, Ádám Z., Çağlar Akçay, Weiss, Talia, Haussmann, Mark F., Moore, Ignacio T., Bonier, Frances
Dátum:	2015
ISSN:	2167-8359
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	PeerJ. - 3 (2015), p.1-11. -
További szerzők:	Akcay, Caglar Weiss, Talia Haussmann, Mark F. Moore, Ignacio T. Bonier, Frances
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

7.

001-es BibID:	BIBFORM102911
035-os BibID:	(Wos)000501728400016 (Scopus)85076555121
Első szerző:	Montreuil-Spencer, Chloé
Cím:	Winter corticosterone and body condition predict breeding investment in a nonmigratory bird / Montreuil-Spencer, Chloé; Schoenemann, Kelsey; Lendvai, Ádám Z; Bonier, Frances
Dátum:	2019
ISSN:	1045-2249
Megjegyzések:	Reproduction is an energetically demanding life history stage that requires costly physiological and behavioral changes, yet some individuals will invest more into reproduction and breed more successfully than others. To understand variation in reproductive investment, previous studies have evaluated factors during breeding, but conditions outside of this life history stage may also play a role. Using a free-ranging population of black-capped chickadees (Poecile atricapillus), we assessed the repeatability of plastic traits relating to energetic condition (circulating initial corticosterone concentrations and body condition) during the nonbreeding season and evaluated whether these traits predicted reproductive investment in the subsequent breeding season. We found that initial corticosterone concentrations and an index of body condition, but not fat score, were moderately repeatable over a 1-week period in winter. This trait repeatability supports the interpretation that among-individual variation in these phenotypic traits could reflect an intrinsic strategy to cope with challenging conditions across life history stages. We found that females with larger fat reserves during winter laid eggs sooner and tended to spend more time incubating their eggs and feeding their offspring. In contrast, we found that females with higher residual body mass delayed breeding, after controlling for the relationship between fat score and timing of breeding. Additionally, females with higher initial corticosterone in winter laid lighter eggs. Our findings suggest that conditions experienced outside of the breeding season may be important factors explaining variation in reproductive investment.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk carryover effect energy allocation glucocorticoid nonmigratory bird repeatability reproduction
Megjelenés:	Behavioral Ecology. - 30 : 6 (2019), p. 1642-1652. -
További szerzők:	Schoenemann, Kelsey Bonier, Frances Lendvai Ádám Zoltán (1977-) (biológus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

Rekordok letöltése

1

Corvina könyvtári katalógus v8.2.27 © 2023 Monguz kft. Minden jog fenntartva.