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1.

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
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Intézményi repozitóriumban (DEA) tárolt változat
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2.

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.
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3.

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
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Intézményi repozitóriumban (DEA) tárolt változat
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4.

001-es BibID:BIBFORM081452
035-os BibID:(cikkazonosító)219
Első szerző:Ouyang, Jenny Q.
Cím:Weathering the storm : parental effort and experimental manipulation of stress hormones predict brood survival / J. Q. Ouyang, Á. Z. Lendvai, R. Dakin, A. D. Domalik, V. J. Fasanello, B. G. Vassallo, M. F. Haussmann, I. T. Moore. F. Bonier
Dátum:2015
ISSN:1471-2148
Megjegyzések:Background Unpredictable and inclement weather is increasing in strength and frequency, challenging organisms to respond adaptively. One way in which animals respond to environmental challenges is through the secretion of glucocorticoid stress hormones. These hormones mobilize energy stores and suppress non-essential physiological and behavioral processes until the challenge passes. To investigate the effects of glucocorticoids on reproductive decisions, we experimentally increased corticosterone levels (the primary glucocorticoid in birds) in free-living female tree swallows, Tachycineta bicolor, during the chick-rearing stage. Due to an unprecedented cold and wet breeding season, 90 % of the nests in our study population failed, which created a unique opportunity to test how challenging environmental conditions interact with the physiological mechanisms underlying life-history trade-offs. Results We found that exogenous corticosterone influenced the regulation of parental decisions in a context-dependent manner. Control and corticosterone-treated females had similar brood failure rates under unfavorable conditions (cold and rainy weather), but corticosterone treatment hastened brood mortality under more favorable conditions. Higher female nest provisioning rates prior to implantation were associated with increased probability of brood survival for treatment and control groups. However, higher pre-treatment male provisioning rates were associated with increased survival probability in the control group, but not the corticosterone-treated group. Conclusions These findings reveal complex interactions between weather, female physiological state, and partner parental investment. Our results also demonstrate a causal relationship between corticosterone concentrations and individual reproductive behaviors, and point to a mechanism for why naturally disturbed populations, which experience multiple stressors, could be more susceptible and unable to respond adaptively to changing environmental conditions.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Corticosterone
Stress
Reproduction
Tree swallow
Tachycineta bicolor
Biparental care
Inclement weather
Hormone implant
Megjelenés:BMC Evolutionary Biology. - 15 : 1 (2015), p. 1-8. -
További szerzők:Lendvai Ádám Zoltán (1977-) (biológus) Dakin, Roslyn Domalik, Alice D. Fasanello, Vincent J. Vassallo, B. G. Haussmann, Mark F. Moore, Ignacio T. Bonier, Fraces
Pályázati támogatás:OTKA K113108
OTKA
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5.

001-es BibID:BIBFORM081429
Első szerző:Ouyang, Jenny Q.
Cím:Do Hormones, Telomere Lengths, and Oxidative Stress form an Integrated Phenotype? : A Case Study in Free-Living Tree Swallows / J. Q. Ouyang, Á. Z. Lendvai, I. T. Moore, F. Bonier, M. F. Haussmann
Dátum:2016
ISSN:1540-7063
Megjegyzések:Synopsis All organisms must anticipate and balance energetic demands and available resources in order to maximize fitness. As hormones coordinate many interactions between an organism's internal condition and the external environment, they may be key in mediating the allocation of resources to meet these demands. However, given that individuals differ considerably in how they react to changes in energetic demand, we asked whether variations in endocrine traits also correspond with life history variation. We tested whether natural variation in glucocorticoid hormone levels, oxidative stress measurements, and condition related to reproductive effort in a free-living songbird, the tree swallow, Tachycineta bicolor. We then tested whether any of these traits predicted the probability of a particular individual's return to the local population in the following two years, an indicator of survival in this philopatric species. We found that males and females with longer telomeres had lighter nestlings. Moreover, individuals with lower plasma antioxidant capacity and higher reactive oxygen metabolites (i.e., greater oxidative stress) were less likely to return to the population. However, none of these traits were related to glucocorticoid levels. Our findings suggest a trade-off between reproduction and survival, with individuals with shorter telomeres having heavier nestlings but potentially paying a cost in terms of higher oxidative stress and lower survival. Interestingly, the evidence of this trade-off was unrelated to natural variation in glucocorticoids.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Integrative And Comparative Biology. - 56 : 2 (2016), p. 138-145. -
További szerzők:Lendvai Ádám Zoltán (1977-) (biológus) Moore, Ignacio T. Bonier, Fraces Haussmann, Mark F.
Pályázati támogatás:OTKA K113108
OTKA
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Intézményi repozitóriumban (DEA) tárolt változat
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6.

001-es BibID:BIBFORM076283
035-os BibID:(WoS)000453304200006 (Scopus)85059133729
Első szerző:Tóth Zsófia (biológus)
Cím:Exploring the mechanistic link between corticosterone and insulin-like growth factor-1 in a wild passerine bird / Zsofia Toth, Jenny Q. Ouyang, Adam Z. Lendvai
Dátum:2019
ISSN:2167-8359
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:PeerJ. - 6 (2019), p. 1-29. -
További szerzők:Ouyang, Jenny Q. Lendvai Ádám Zoltán (1977-) (biológus)
Pályázati támogatás:OTKA-113108
OTKA
TÉT 15-1-2016-0044
Egyéb
EFOP-3.6.1-16-2016-00022
EFOP
NTP-EFÖ-P-15-041
Egyéb
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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7.

001-es BibID:BIBFORM102034
035-os BibID:(WoS)000587675100001 (Scopus)85095965900
Első szerző:Vágási Csongor István
Cím:The Relationship between Hormones, Glucose, and Oxidative Damage Is Condition and Stress Dependent in a Free-Living Passerine Bird / Csongor I. Vágási, Zsófia Tóth, Janka Pénzes, Péter L. Pap, Jenny Q. Ouyang, Ádám Z. Lendvai
Dátum:2020
ISSN:1522-2152
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
glucocorticoid
house sparrow
IGF-1
oxidative stress
restraint
phenotypic intagration
somatotropic axis
Megjelenés:Physiological And Biochemical Zoology. - 93 : 6 (2020), p. 466-476. -
További szerzők:Tóth Zsófia (1991-) (biológus) Pénzes Janka Pap Péter László (ökológus) Ouyang, Jenny Q. Lendvai Ádám Zoltán (1977-) (biológus)
Pályázati támogatás:EFOP-3.6.1-16-2016-00022
EFOP
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Intézményi repozitóriumban (DEA) tárolt változat
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