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1.

001-es BibID:BIBFORM049459
Első szerző:Bán Miklós (biológus)
Cím:Simultaneous viewing of own and parasitic eggs is not required for egg rejection by a cuckoo host / Miklós Bán, Csaba Moskát, Zoltán Barta, Márk E. Haube
Dátum:2013
ISSN:1045-2249
Megjegyzések:Many hosts have evolved diverse cognitive mechanism to recognize and reduce the cost of social parasitism. For example, great reed warblers Acrocephalus arundinaceus can accurately reject closely mimetic eggs of brood parasitic common cuckoos Cuculus canorus. Yet, these same hosts are less effective at identifying and rejecting parasitism when the clutch is parasitized by multiple cuckoo eggs, suggesting a role for discordancy (the rejection of the egg type in the minority of the clutch) and/or online self-referent phenotype matching (the simultaneous viewing of cuckoo and own egg in the nest) to reject foreign egg. We tested whether the presence of host's own eggs is required for the discrimination of foreign eggs by dyeing hosts' own eggs with one of several colors so that clutches contained (a) 1 dyed and 4 unmanipulated eggs, (b) 3 dyed and 2 unmanipulated eggs, or 5 eggs dyed either (c1) differently or (c2) similarly. Rejection rates of dyed eggs varied widely between different colors and were highest in treatment (a), with 1 dyed egg, compared with treatments with the majority (b) or all (c1 and c2) dyed eggs. However, relative rejection rates of dyed eggs were also consistent among specific colors across treatments, including (c1) and (c2), where no unmanipulated own eggs were available for viewing and irrespectiveof whether eggs were dyed all different colors (c1) or the same colors (c2). We conclude that these hosts can rely on comparisons of foreign egg colors against an internal recognition template of acceptable (own) egy phenotypes.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
brood parasitism
egg recognition
egg rejection
multiple parasitism
phenotype matching
recognition template
Élettudományok - Biológiai tudományok
Megjelenés:Behavioral Ecology. - 24 : 4 (2013), p. 1014-1021. -
További szerzők:Moskát Csaba Barta Zoltán (1967-) (biológus, zoológus) Hauber, Mark E.
Pályázati támogatás:MTA-DE Lendület
MTA
Viselkedésökológiai Kutatócsoport
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Intézményi repozitóriumban (DEA) tárolt változat
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2.

001-es BibID:BIBFORM023238
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:Breedingcolonies as information centres : A re-appraisal of information-based hypotheses using the producer-scrounger game / Zoltán Barta, Luc-Alain Giraldeau
Dátum:2001
ISSN:1045-2249
Megjegyzések:One of the most cited hypotheses for the evolutionary advantages of colonial breeding proposes that colonies serve as a place of information exchange about the location of food-the information center hypothesis. Despite its popularity, the hypothesis generated considerable controversy over its predictions and role in the evolution of colonial breeding. As a consequence, the hypothesis still lingers on, despite nzmerous apparent falsifications from both observational and experimental approaches. The controversy has three roots: the unclear casual direction between coloniality and information center, the unrecognized distinction between colonial breeding and colonial roosting, and the use of an implicit group selectionist argument. Here we try to clarify this controversy by applying an ertirely individual selection-based approach, the producer-scrounger game, to the information center hypothesis. Futhermore, we show how other information-based alternatives of the original information center hypothesis ( e.g., local enhancement and recruitment center hypotheses)can be included in a common framework. Our model predicts that individuals relying on information transfer at the colony should be rather common in nature. This prediction is essentially unaltered by the inclusion of either local enhancement or recruitment center.On the other hand, the frequency of leading unknowledgeable individuals (the most accepted sign of information center)is expected to be very low. the model indicates that tests of information-based hypotheses should focus on the expected relative frequency of food-searching fligts rather than the frequency of leading.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Information center
local enhancement
producer-scrounger games
recruitment center
Megjelenés:Behavioral Ecology. - 12 : 2 (2001), p. 121-127. -
További szerzők:Giraldeau, Luc-Alain
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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3.

001-es BibID:BIBFORM023392
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:The effect of dominance hierarchy on the use of alternative foraging tactics: a phenotype-limited producing-scrounging game / Zoltán Barta, Luc-Alain Giraldeau
Dátum:1998
Megjegyzések:Group living is thought to be advantageous for animals, though it also creates opportunities for exploitation. Using food discovered by others can be described as a producer-scrounger, frequency-dependent game. In the game, scroungers (parasitic individuals) do better than producers (food finders) when scroungers are rare in the group, but they do worse when scroungers are common. When the individuals' payoffs do not depend on their phenotype (i.e. a symmetric game), this strong negative frequency dependence leads to a mixed stable solution where both alternatives obtain equal payoffs. Here, we address the question of how differences in so- cial status in a dominance hierarchy in?uence the indi- viduals' decision to play producer or scrounger in small foraging groups. We model explicitly the food intake rate of each individual in a dominance-structured for- aging group, then calculate the Nash equilibrium for them. Our model predicts that only strong differences in competitive ability will in?uence the use of producing or scrounging tactics in small foraging groups; dominants will mainly play scrounger and subordinates will mostly use producer. Since the differences in competitive ability of different-ranking individuals likely depend on the economic defendability of food, our model provides a step towards the integration of social foraging and re- source defence theories.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Dominance hierarchy
Game theory
Group foraging
Phenotype limitation
Producer-scrounger
Megjelenés:Behavioral Ecology and Sociobiology. - 42 : 3 (1998), p. 217-223. -
További szerzők:Giraldeau, Luc-Alain
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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4.

001-es BibID:KLTEbibl003093
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:The role of information transfer under different food patterns : a simulation study / Barta Zoltán, Szép Tibor
Dátum:1992
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Behavioural Ecology. - 3 : 4 (1992), p. 318-324. -
További szerzők:Szép Tibor
Internet cím:DOI
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5.

001-es BibID:BIBFORM096488
035-os BibID:(WoS)000493378300004 (Scopus)85072370499
Első szerző:Fülöp Attila (biológus)
Cím:Personality and social foraging tactic use in free-living Eurasian tree sparrows (Passer montanus) / Fülöp Attila, Németh Zoltán, Kocsis Bianka, Deák-Molnár Bettina, Bozsoky Tímea, Barta Zoltán
Dátum:2019
ISSN:1045-2249
Megjegyzések:Group-foraging individuals often use alternative behavioral tactics to acquire food: some individuals, the producers, actively search for food, whereas others, the scroungers, look for opportunities to exploit the finders' discoveries. Although the use of social foraging tactics is partly flexible, yet some individuals tend to produce more, whereas others largely prefer to scrounge. This between-individual variation in tactic use closely resembles the phenomenon of animal personality; however, the connection between personality and social foraging tactic use has rarely been investigated in wild animals. Here, we studied this relationship in free-living Eurasian tree sparrows (Passer montanus) during 2 winters. We found that in females, but not in males, social foraging tactic use was predicted by personality: more exploratory (i.e., more active in a novel environment) females scrounged more. Regardless of sex, the probability of scrounging increased with the density of individuals foraging on feeders and the time of feeding within a foraging bout, that is, the later the individual foraged within a foraging bout the higher the probability of scrounging was. Our results demonstrate that consistent individual behavioral differences are linked, in a sex-dependent manner, to group-level processes in the context of social foraging in free-living tree sparrows, suggesting that individual behavioral traits have implications for social evolution.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
exploration
open-field test
producer
scrounger
social behavior
Megjelenés:Behavioral Ecology. - 30 : 4 (2019), p. 894-903. -
További szerzők:Németh Zoltán (1976-) (biológus) Kocsis Bianka Deák-Molnár Bettina Bozsoky Tímea Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:OTKA-112527
OTKA
PD121013
OTKA
FK124414
OTKA
EFOP-3.6.1-16-2016-00022
EFOP
Internet cím:Szerző által megadott URL
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Intézményi repozitóriumban (DEA) tárolt változat
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6.

001-es BibID:BIBFORM096419
035-os BibID:(cikkazonosító)38 (WoS)000611543600001 (Scopus)85099821531
Első szerző:Fülöp Attila (biológus)
Cím:Sex-specific signalling of individual personality by a mutual plumage ornament in a passerine / Attila Fülöp, Dóra Lukács, Péter Imre Fábián, Bianka Kocsis, Gabriella Csöppü, Judit Bereczki, Zoltán Barta
Dátum:2021
ISSN:0340-5443
Megjegyzések:The significance of colour signals in species with strong sexual dimorphism and/or elaborated visual ornaments is rather well-understood. Less attention has, however, been devoted to study colour signals in species with weak or no apparent sexual dimorphism. In such species, an interesting possibility arises as both sexes can bear the same colour ornament(s) (i.e. sexes are mutually ornamented), but their signalling value might differ in males and females. We aimed to explore this possibility by investigating the phenotypic correlates of the black bib, a melanin-based plumage ornament, in the Eurasian tree sparrow (Passer montanus). More specifically, we studied the sex-dependent relationships between bib size and three aspects of individuals' phenotype: body condition (i.e. size-corrected body mass), physiology (i.e. cellular innate immunity/inflammation status, expressed through total leucocyte counts, and chronic physiological stress, expressed through the ratio of heterophils to lymphocytes) and individual personality (i.e. activity in a novel environment). We found that bib size was not associated with body condition and cellular innate immunity/inflammation status, but was positively related to physiological stress levels independent of sex. Furthermore, bib size was negatively associated with activity in males but positively in females. Our findings bring important correlative evidence that mutual ornamental traits may have sex-specific signalling value.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Melanin-based ornament
Personality
Physiology
Melanocortin hypothesis
Phenotypic integration
Passer montanus
Megjelenés:Behavioral Ecology And Sociobiology. - 75 : 2 (2021), p. 1-13. -
További szerzők:Lukács Dóra Fábián Péter Imre Kocsis Bianka Csöppü Gabriella Bereczki Judit (1979-) (biológus) Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:OTKA-112527
OTKA
EFOP-3.6.1-16-2016-00022
EFOP
NKFIH-1150-6/2019
FIKP
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Intézményi repozitóriumban (DEA) tárolt változat
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7.

001-es BibID:BIBFORM018785
Első szerző:Lendvai Ádám Zoltán (biológus)
Cím:Conflict over parental care in house sparrows : do females use a negotiation rule? / Ádám Z. Lendvai, Zoltán Barta, Olivier Chastel
Dátum:2009
ISSN:1045-2249
Megjegyzések:Ho do parents resolve their conflict over parental care? The classical "sealed-bid" model of biparental care suggested that parents use a fixed best effort given the partner's effort. Alternatively, parents may "negotiate" their actual effort until the efforts of both partners settle down to limiting values, but in this case, the resulting efforts will not be the best responses to one another. Consequently, under the best response scenario, the response of 1 parent to the removal of its mate can be predicted from the response to a reduction in its partner's effort, whereas the "negotiation" model predicts that such an extrapolation will underestimate the effort of a parent caring alone. We tested this prediction in free-living house sparrows (Passer domesticus). We experimentally manipulated the males' parental care as follows: males' care in group 1) was reduced by using a capture-handling-release stress protocol, 2) stopped by removing the male, and 3) left as control. In response to these manipulations, control females kept their feeding rate constant, whereas male-stressed-released females showed a moderate increase of feeding rate. When this response was extrapolated to zero male effort, their effort was still significantly lower than the observed effort of male-removed females. These results suggest that females may use the negotiation rule to determine their actual parental effort.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
biparental care
handicapping
mate removal
Passer domesticus
sexual conflict.
Megjelenés:Behavioral Ecology. - 20 : 3 (2009), p. 651-656. -
További szerzők:Barta Zoltán (1967-) (biológus, zoológus) Chastel, Olivier
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
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8.

001-es BibID:BIBFORM022924
Első szerző:McNamara, John M.
Cím:Should young ever be better off with one parent than with two? / John M. McNamara, Alasdair I. Houston, Zoltán Barta, José-Luis Osorno
Dátum:2003
Megjegyzések:We analyze models of parental care, providing the first systematic comparison of the care given to young by one parent versus by two parents. In the Houston-Davies model of care, young always do better with two parents rather than with one parent. When one parent decides about its level of care before the other, then the young may do better with one parent when the costs of care for the parents are asymmetric. When the level of parental effort is reached by negotiation, there are cases in which young do better with one parent, even when costs are symmetric. The analysis suggests empirical ways to differentiate between different response rules
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
game theory
mate removal
negotiation
parental effort
Megjelenés:Behavioral Ecology. - 14 : 3 (2003), p. 301-310. -
További szerzők:Houston, Alasdair I. Barta Zoltán (1967-) (biológus, zoológus) Osorno, José-Luis
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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