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1.

001-es BibID:BIBFORM022845
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:The effects of predation risk on the use of social foraging tactics / Zoltán Barta, András Liker, Ferenc Mónus
Dátum:2004
Megjegyzések:The effects of predation on the use of social foraging tactics, such as producing and scrounging, are poorly known in animals. On the one hand, recent theoretical models predict increased use of scrounging with increasing predation risk, when scroungers seeking feeding opportunities also have a higher chance of detecting predators. On the other hand, there may be no relation between tactic use and predation when antipredator vigilance is not compatible with scanning flockmates. We investigated experimentally the effects of predation risk on social foraging tactic use in tree sparrows, Passer montanus. We manipulated predation risk in the field by changing the distance between shelter and a feeder. Birds visited the feeder in smaller flocks, spent less time on it and were somewhat more vigilant far from shelter than close to it. Increased predation risk strongly affected the social foraging tactic used: birds used the scrounger tactic 30% more often far from cover than close to it. Between-flock variability in scrounging frequency was not related to the average vigilance level of the flock members, and within-flock variability in the use of scrounging was negatively related to the vigilance of birds. Our results suggest that in tree sparrows, the increased frequency of scrounging during high predation risk cannot simply be explained by an additional advantage of increasing antipredator vigilance. We propose alternative mechanisms (e.g. increased stochasticity in food supply, and that riskier places are used by individuals with lower reserves) that may explain increased scrounging when animals forage under high predation risk
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Animal Behaviour. - 67 : 2 (2004), p. 301-308. -
További szerzők:Liker András Mónus Ferenc
Internet cím:DOI
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2.

001-es BibID:BIBFORM035617
Első szerző:Gyuris Enikő
Cím:Personality traits across ontogeny in firebugs, Pyrrhocoris apterus / Gyuris Enikő, Feró Orsolya, Barta Zoltán
Dátum:2012
ISSN:0003-3472
Megjegyzések:Consistent behavioural differences have long been recognized in animals but it still remains unclear how these traits change over ontogeny. As individuals can face different situations over their lives, and their life history expectation may not be the same in different life stages, one can expect that using different strategies in different life stages would be adventageous. Characteristics of animal personality across ontogeny could be measured at group and individual levels. Since personality alteration across time can be studied from various aspects one should use the following indexes: mean-level, differential, structural and individual consistency. We investigated whether common firebugs behave in the same way throug a major life stage transition, namely final ecdysis. We measured activity, boldness and exploration twice in the larval stage and also twice when bugs reached the adult stage. We found that the relative value of behavioural traits was stable across ontogeny and the correlation structure among behavioural traits remained constant over time. Nevertheless, larvae differed from adults in general in that they were bolder, explored their environment more thoroughly and seemed to be more active before final ecdysis. These results indicate that personality could change differently across major life stage transitions; therefore this importand factor needs to be considered in further research.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
animal personality
ecdysis
firebug
larval-adult transition
life history
ontogeny
Pyrrhocoris apterus
sexual maturation
Egészség- és Környezettudomány
Megjelenés:Animal Behaviour. - 84 : 1 (2012), p. 103-109. -
További szerzők:Feró Orsolya Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:TÁMOP-4.2.1/B-09/1/KONV-2010-0007
TÁMOP
Viselkedésökológiai Kutatócsoport
TÁMOP-4.2.2/B-10/-1-2010-0024
TÁMOP
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3.

001-es BibID:BIBFORM021571
Első szerző:Lendvai Ádám Zoltán (biológus)
Cím:The effects of energy reserves and dominance on the use of social-foraging strategies in the house sparrow / Ádám Z. Lendvai, András Liker, Zoltán Barta
Dátum:2006
Megjegyzések:In social animals, dominance rank often influences individuals' behaviour, but in most cases it is unknown how dominance modulates the effects of other phenotypic traits. We investigated the mutual effects of social dominance and the level of energy reserves on the use of social-foraging strategies in captive flocks of house sparrows, Passer domesticus.We used experimental wind exposure to manipulate overnight energy expenditure of dominant and subordinate individuals. In response to the experimental treatment dominants used scrounging (exploiting others' food finding) significantly more, whereas for subordinates there was only a moderate and nonsignificant increase in scrounging. Individual variability in the frequency of scrounging was higher in subordinates than in dominants and this difference between the dominance groups was unaffected by the treatment. These results suggest that individuals of different dominance status adopt different strategies: to cope with an energetically challenging situation, dominants behave rather uniformly by increasing further their preference for scrounging, whereas subordinates do not alter their tactic, but may rely on using scrounging opportunistically.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Animal behaviour. - 72 : 4 (2006), p. 747-752. -
További szerzők:Liker András Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:DOI
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4.

001-es BibID:BIBFORM081268
Első szerző:Orci Kirill Márk
Cím:Instantaneous song modification in response to fluctuating traffic noise in the tree cricket Oecanthus pellucens / Kirill Márk Orci, Krisztina Petróczki, Zoltán Barta
Dátum:2016
ISSN:0003-3472
Megjegyzések:Noise pollution is a world-wide phenomenon and its effects on animal behaviour have been investigated by numerous studies focusing mostly on vertebrate taxa. However, studying how insects are impacted by human-made noise is indispensable, because of their ecological importance and in order to gain a more comprehensive knowledge of how animals can cope with this new challenge. The few studies that have examined the effects of noise pollution on the acoustic signalling of insects have characterized noise over long timescales. In this study we examined whether males of the tree cricket Oecanthus pellucens modify their calling song in response to the fluctuation in traffic noise over a short timescale. To examine this question we carried out (1) noise level measurements over a short time window (200 ms) paired with song parameter measurements on sound recordings of males singing in their noise-polluted habitats and (2) laboratory playback experiments in which each singing male was recorded during a silent control period and during noise playback. Our results show that males shortened their calls (echemes) and paused singing with a higher probability with increasing noise level. However, males did not modify the fundamental frequency of their song and did not adjust the duration of the interecheme interval in response to noise. These results suggest that crickets decrease signalling effort during high levels of noise and, at least for the song parameters we examined, do not modify their signals, as do birds and frogs, to reduce masking by anthropogenic noise.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
acoustic signalling
anthropogenic noise
behavioural plasticity
tree cricket
urbanization
Megjelenés:Animal Behaviour. - 112 (2016), p. 187-194. -
További szerzők:Petróczki Krisztina Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:SROP4.2.2.B-15/1/KONV-2015-0001
Egyéb
OTKA K81929
OTKA
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5.

001-es BibID:BIBFORM071544
Első szerző:Rádai Zoltán (biológus)
Cím:Pace of life and behaviour : rapid development is linked with increased activity and voracity in the wolf spider Pardosa agrestis / Zoltán Rádai, Balázs Kiss, Zoltán Barta
Dátum:2017
ISSN:0003-3472
Megjegyzések:Modern life history theory hypothesizes that pace of life is a strong predictor of life history traits. Recently, the notion that life history studies should integrate animal behaviour has emerged, because between-individual differences in behaviour are often coupled with fitness differences. So far, studies have mainly focused on interspecies or interpopulation perspectives, and research on the effects of life history differences on individual behaviour remain scarce. In the present study we aimed to contribute to the understanding of how pace of life is related to consistent individual behaviour. We investigated the relationship between developmental speed and consistent behaviour of the field wolf spider, Pardosa agrestis. In this species, individuals originating from the same clutch can typically follow either a slow or a rapid developmental pathway, characterized by a developmental time of about 10 or 3 months, respectively. We found that spiders, regardless of their developmental speed, behaved consistently in most of the tests. Our results also show that individuals developing rapidly were significantly more active during exploration and more successful in prey-catching tests than slowly developing spiders. Although rapidly developing spiders were bolder in one of the tests, this difference did not persist over the repeated measurements. Our work seems to support the notion that pace of life and animal personality are correlated, and pace of life might predict the behavioural types of individuals.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
boldness
cohort splitting
exploration
hunting success
life history
personality
Megjelenés:Animal Behaviour. - 126 (2017), p. 145-151. -
További szerzők:Kiss Balázs (biológia) Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:NTP-EFÖ-P-15
Egyéb
NKFIH K112527
Egyéb
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6.

001-es BibID:BIBFORM097706
Első szerző:Rosa Márta Erzsébet
Cím:The effects of adult sex ratio and density on parental care in Lethrus apterus (Coleoptera, Geotrupidae) / Rosa Márta E., Barta Zoltán, Fülöp Attila, Székely Tamás, Kosztolányi András
Dátum:2017
ISSN:0003-3472
Megjegyzések:Theoretical models suggest that adult sex ratio (ASR) and population density are expected to influence parental roles by reducing the mating opportunities of the commoner sex and by changing the intensity of sperm competition, although experimental evidence for these predictions is sparse. In biparental species with a high risk of extrapair paternity and consecutive egg laying over the breeding period, males are expected to reduce their parental investment and to spend more time on mate guarding if male density is high, to maximize their fitness. We conducted a field experiment to test this hypothesis in Lethrus apterus, a flightless biparental beetle species from the Geotrupidae family. Using seminatural enclosures, we assigned individuals to nine treatment groups differing in adult sex ratio (three levels) and individual density (three levels) using a full factorial experimental design. Nest attendance and parental provisioning (i.e. collecting and transporting leaves to the nest) were recorded as well as the number, size and sex ratio of the offspring. We found that as the level of male?male competition increased, generated either by the increased density of individuals or by the male-biased sex ratio, pairs showed higher nest attendance and collected fewer leaves. Male-biased groups also produced fewer offspring under high and low densities indicating a possible conflict of interest between the sexes over paternity and brood size. These results support the increased paternity assurance hypothesis under a high level of intrasexual competition.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
adult sex ratio
certainty of paternity
density
Geotrupidae
Lethrus
mate guarding
parental care
parental roles
sperm competition
Megjelenés:Animal Behaviour. - 132 (2017), p. 181-188. -
További szerzők:Barta Zoltán (1967-) (biológus, zoológus) Fülöp Attila (1987-) (biológus) Székely Tamás (1959-) (biológus) Kosztolányi András (1971-) (biológus)
Pályázati támogatás:K112670
Egyéb
K112527
Egyéb
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7.

001-es BibID:BIBFORM059317
Első szerző:Schmidt Júlia
Cím:Reproductive asynchrony and infanticide in house mice breeding communally / Júlia Schmidt, András Kosztolányi, Jácint Tökölyi, Boglárka Hugyecz, Ildikó Illés, Rozália Király, Zoltán Barta
Dátum:2015
ISSN:0003-3472
Megjegyzések:Earlier findings suggest that female house mice,Mus musculus, breeding communally care for eachother's offspring indiscriminately in a communal nest. The ultimate explanation for this apparentlyaltruistic behaviour is still not well understood. Communal breeding creates a situation in whichdeceptive behaviour may be an alternative tactic, possibly coexisting with genuine altruism. To inves-tigate this phenomenon we studied caring behaviour and infanticide as two opposite facets of communalbreeding in triplets of unrelated females, and developed a dynamic model to help interpret our results. Ofthe 142 litters observed, in 30 all pups were killed by adult females and in 37 only some of the littersurvived infanticide. Our empirical results are in concordance with our model's prediction and show thatasynchrony in reproduction has a strong nonlinear effect on reproductive success: pups of litters born inthe middle of the caring period of any female in the group had the lowest expected survival probability.Females that partly or totally lost their litter tended to spend less time caring for pups that were not theirown, but they still contributed considerably to the common care. These findings suggest that infanticideis an effective strategy to exploit nestmates. As house mice are unable to discriminate between similarlyaged young pups, synchronous breeding (e.g. by oestrus synchronization) may be an effective counter-strategy against infanticidal conspecifics
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
breeding synchrony
communal breeding
dynamic model
female infanticide
reproductive skew
social behaviour
Élettudományok - Biológiai tudományok
Megjelenés:Animal Behaviour. - 101 (2015), p. 201-211. -
További szerzők:Kosztolányi András (1971-) (biológus) Tökölyi Jácint (1984-) (biológus) Hugyecz Boglárka Illés Ildikó Király Rozália Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:MTA-DE Lendület
MTA
Viselkedésökológiai Kutatócsoport
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