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001-es BibID:BIBFORM078432
035-os BibID:(cikkazonosító)185 (WoS)000450519600002 (Scopus)85056825087
Első szerző:Lendvai Ádám Zoltán (biológus)
Cím:Male parental investment reflects the level of partner contributions and brood value in tree swallows / Lendvai Ádám Zoltán, Caglar Akcay, Mark Stanback, Mark F. Haussmann, Ignacio T. Moore, Fraces Bonier
Dátum:2018
ISSN:0340-5443
Megjegyzések:Biparental care presents an interesting case of cooperation and conflict between unrelated individuals. Several models have been proposed to explain how parents should respond to changes in each other's parental care to maximize their own fitness, predicting no change, partial compensation, or matching effort as a response. Here, we present an experiment in tree swallows (Tachycineta bicolor) in which we increased the offspring provisioning of females by presenting them, but not their mates, with additional nestling begging calls using automated playbacks. We performed this experiment in two populations differing in future breeding opportunities. We found that in response to a temporary increase in female parental effort, males in the northern population (with lower future breeding opportunities and thus higher brood value) matched the increased effort, whereas males in the southern population did not. We also found that increases in parental care during playbacks were driven by the females (i.e., females initiated the increased effort and their mates followed them) in the northern population but not the southern population. These results support the idea that with incomplete information about the brood value and need, cues or signals from the partner might become important in coordinating parental care.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Biparental care
Parental effort
Negotiation
Sexual conflict
Tree swallow
Megjelenés:Behavioral Ecology And Sociobiology. - 72 : 12 (2018), p. 1-11. -
További szerzők:Akcay, Caglar Stanback, Mark Haussmann, Mark F. Moore, Ignacio T. Bonier, Fraces
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DOI
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2.

001-es BibID:BIBFORM049722
Első szerző:Lendvai Ádám Zoltán (biológus)
Cím:Carotenoid-based plumage coloration reflects feather corticosterone levels in male house finches (Haemorhous mexicanus) / Á. Z. Lendvai, M. Giraudeau, J. Németh, V. Bakó, K. J. McGraw
Dátum:2013
Megjegyzések:Indicator models of sexual selection predict thatexaggerated traits communicate information about sender conditionor quality to conspecific receivers. Environmental challengeshave often been considered as one such condition thatcould be encoded in an ornamental trait, and there is nowextensive evidence showing how different stressors (e.g., nutritional,parasitological, and environmental) impact sexual signalelaboration. One of the primary means of assessing stress is byquantifying glucocorticoid (corticosterone or cortisol (CORT))levels. For many ornaments, CORT impairs trait expression;however, the evidence is limited and mixed for one of theclassic honest signals in animals, ornamental carotenoid coloration.In a model species for studies of carotenoid ornamentation(the house finch, Haemorhous mexicanus), we examinedthe relationship between male plumage redness and featherCORT levels, which serve as an integratedmeasure of hormoneconcentration during feather growth. We measured CORT inboth tail (melanin-containing) and breast (carotenoid-containing)feathers and found that CORT levels were not differentbetween body regions, but they were negatively correlated withplumage hue, with redder birds having more CORT in feathers.Despite opposing traditional views on stress and ornamentation,our results actually corroborate three other studies showingpositive relationships between carotenoid coloration andCORT levels. Though the molecular mechanisms underlyingsuch a relationship are still unclear, our results suggest thatCORT should not be considered as a simple indicator of individualquality but rather as a mediator of complex allocationdecisions or signals of metabolic activity that could link up withmore elaborate expression of ornamental traits.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Honest signaling
Plumage ornamentation
Sexual selection
Stress hormones
Stress response
Megjelenés:Behavioral Ecology and Sociobiology. - 67 (2013), p. 1817-1824. -
További szerzők:Giraudeau, Mathieu Németh József (1954-) (vegyész, analitikus) Bakó V. McGraw, Kevin J.
Pályázati támogatás:75965
OTKA
PD76862
OTKA
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM103262
035-os BibID:(cikkazonosító)39 (WOS)000521053300003 (Scopus)85081599279
Első szerző:Mahr, Katharina
Cím:Insulin-like growth factor 1 is related to the expression of plumage traits in a passerine species / Katharina Mahr, Orsolya Vincze, Zsófia Tóth, Herbert Hoi, Ádám Z. Lendvai
Dátum:2020
ISSN:0340-5443
Megjegyzések:Avian plumage colors and ornaments are excellent models to study the endocrine mechanisms linking sexually selected traits and individual parameters of quality and condition. Insulin-like growth factor 1 (IGF-1) is an evolutionarily highly conserved peptide hormone. Its regulatory role in cell proliferation and differentiation and its high sensitivity to the nutritional state of individuals suggest it as an interesting candidate, possibly providing a link between body condition and individual capacity to grow elaborated ornamental features. We investigated whether IGF-1 levels during molting correlate with the expression of multiple ornaments in a sexually dichromatic passerine species, the bearded reedling (Panurus biarmicus). We collected blood samples of males and females shortly before the molting completed and measured the size and colors of ornamental traits. Our results indicate that in males, structural plumage colors, the size of the melanin-based ornament (beard), and tail length are independent traits. IGF-1 levels are associated with the length of the tail and the expression of male structural plumage components (UV coloration), but not the melanin-based ornament. In females, plumage color and tail length were independent traits, which were not related to IGF-1 levels. To the best of our knowledge, this study provides the first evidence that IGF-1 could play a role in the development of secondary sexual characters in a bird species.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Plumage coloration
Sexual selection
Physiology
IGF-1
Condition
Megjelenés:Behavioral Ecology and Sociobiology. - 74 : 3 (2020), p. 1-12. -
További szerzők:Vincze Orsolya (1988-) (biológus) Tóth Zsófia (1991-) (biológus) Hoi, Herbert Lendvai Ádám Zoltán (1977-) (biológus)
Pályázati támogatás:K 113108
OTKA
EFOP-3.6.1-16-2016-00022
EFOP
TET 15-1-2016-0044
Egyéb
MÁEÖ2016_15/76740
Egyéb
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4.

001-es BibID:BIBFORM107995
035-os BibID:(Wos)000368633900006 (Scopus)84954390266
Első szerző:Mougeot, Francois
Cím:Parasites, mate attractiveness and female feather corticosterone levels in a socially monogamous bird / François Mougeot, Ádám Z. Lendvai, Jesús Martínez-Padilla, Lorenzo Pérez-Rodríguez, Mathieu Giraudeau, Fabián Casas, Ignacio T. Moore, Steve Redpath
Dátum:2016
ISSN:0340-5443
Megjegyzések:Stress is ubiquitous in the life of animals and a key determinant of their well-being and fitness. By quantifying levels of feather corticosterone in growing feathers (CORTf), we measured integrated stress responses in a monogamous game bird, the red grouse Lagopus lagopus scoticus. We investigated the effects of parasites and social mate choice on female CORTf levels during pairing, and tested the hypothesis that females with more parasites and paired with less attractive males have higher CORTf. We experimentally reduced nematode parasite abundance during pairing in females and investigated the effect of treatment on CORTf, while also considering the social mate`s phenotype (male comb size, as a proxy of sexual attractiveness). The treatment was effective at contrasting parasite loads between control and dosed females, but had no apparent effect on CORTf. In experimental females, reinfection rate after a month positively correlated with CORTf. We found no evidence of assortative mating based on size, condition or ornament size, but females paired with more attractive males (displaying bigger combs) had lower CORTf during pairing. Females for which parasite load was reduced had lower CORTf than control females at all levels of male attractiveness. Social mate choice therefore appears to be an important determinant of female integrated stress responses, which may in turn modulate reinfection rate and parasitism risk. An influence of male attractiveness on female stress may be part of an adaptive response allowing females to adjust reproductive investment to their achieved social mate choice.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Behavioral Ecology And Sociobiology. - 70 : 2 (2016), p. 277-283. -
További szerzők:Lendvai Ádám Zoltán (1977-) (biológus) Martínez-Padilla, Jesús Pérez-Rodríguez, Lorenzo Giraudeau, Mathieu Casas, Fabián Moore, Ignacio T. Redpath, Steve
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5.

001-es BibID:BIBFORM070941
Első szerző:Tóth Zoltán
Cím:Kinship and aggression: do house sparrows spare their relatives? / Tóth Zoltán, Bókony Veronika, Lendvai Ádám Z., Szabó Krisztián, Pénzes Zsolt, Liker András
Dátum:2009
ISSN:0340-5443 1432-0762
Megjegyzések:Kin-selection theory predicts that relatedness may reduce the level of aggression among competing group members, leading to indirect fitness benefits for kin-favoring individuals. To test this hypothesis, we investigated whether relatedness affects aggressive behavior during social activities in captive house sparrow (Passer domesticus) flocks. We found that sparrows did not reduce their aggression towards kin, as neither the frequency nor the intensity of fights differed between close kin and unrelated flock-mates. Fighting success was also unrelated to kinship and the presence of relatives in the flock did not influence the birds' dominance rank. These results suggest that the pay-offs of reduced aggression towards kin may be low in non-breeding flocks of sparrows, e.g. due to competition among relatives as predicted by a recent refinement of kin-selection theory. Our findings indicate that the significance of kin selection may be restricted in some social systems such as winter aggregations of birds.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Genetic relatedness
Aggression Dominance
Kin discrimination
House sparrow
Megjelenés:Behavioral Ecology And Sociobiology 63 : 8 (2009), p. 1189-1196. -
További szerzők:Bókony Veronika (alkalmazott zoológus) Lendvai Ádám Zoltán (1977-) (biológus) Szabó Krisztián (1975-) (zoológus) Pénzes Zsolt Liker András
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