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1.

001-es BibID:BIBFORM021579
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:Annual routines of non-migratory birds : optimal moult strategies / Zoltán Barta, Alasdair I. Houston, John M. McNamara, Robert K. Welham, Anders Hedenström, Thomas P. Weber, Orsolya Feró
Dátum:2006
ISSN:0030-1299
Megjegyzések:In a periodically changing environment it is important for animals to properly time the major events of their life in order to maximise their lifetime fitness. For a non-migratory bird the timing of breeding and moult are thought to be the most crucial. We develop a state-dependent optimal annual routine model that incorporates explicit density dependence in the food supply. In the model the birds' decisions depend on the time of year, their energy reserves, breeding status, experience, and the quality of two types of feathers (outer and inner primaries). Our model predicts that, under a seasonal environment, feathers with large effects on flight ability, higher abrasion rate and lower energetic cost of moult should be moulted closer to the winter (i.e. later) than those with the opposite attributes. Therefore, we argue that the sequence of moult may be an adaptive response to the problem of optimal timing of moult of differing feathers within the same feather tract. The model also predicts that environmental seasonality greatly affects optimal annual routines. Under high seasonality birds breed first then immediately moult, whereas under low seasonality an alternation occurs between breeding and moulting some of the feathers in one year and having a complete moult but no breeding in the other year. Increasing food abundance has a similar effect.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Oikos. - 112 (2006), p. 580-593. -
További szerzők:Houston, Alasdair I. McNamara, John M. Welham, Robert K. Hedenström, Anders Weber, Thomas P. Feró Orsolya
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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2.

001-es BibID:BIBFORM018796
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:Optimal moult strategies in migratory birds / Zoltán Barta, John M. McNamara, Alasdair I. Houston, Thomas P. Weber, Anders Hedenström, Orsolya Feró
Dátum:2008
Megjegyzések:Avian migration, which involves billions of birds flying vast distances, is known to influence all aspects of avian life. Here we investigate how birds fit moult into an annual cycle determined by the need to migrate. Large variation exists in moulting patterns in relation to migration: for instance, moult can occur after breeding in the summer or after arrival in the wintering quarters. Here we use an optimal annual routine model to investigate why this variation exists. The modelled bird's decisions depend on the time of year, its energy reserves, breeding status, experience, flight feather quality and location. Our results suggest that the temporal and spatial variations in food are an important influence on a migratory bird's annual cycle. Summer moult occurs when food has a high peak on the breeding site in the summer, but it is less seasonal elsewhere. Winter moult occurs if there is a short period of high food availability in summer and a strong winter peak at different locations (i.e. the food is very seasonal but in opposite phase on these areas). This finding might explain why only long-distance migrants have a winter moult.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
optimal annual routines
moult
migration
birds
state-dependent dynamic models
dynamic programming
Megjelenés:Philosophical Transactions Of The Royal Society of London, Series B. - 363 : 1490 (2008), p. 211-230. -
További szerzők:McNamara, John M. Houston, Alasdair I. Weber, Thomas P. Hedenström, Anders Feró Orsolya
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM078302
035-os BibID:(WoS)000461343400004 (Scopus)85065035678
Első szerző:Feró Orsolya
Cím:Spatio-temporal structure and reproductive success in a Rook (Corvus frugilegus) colony / Feró Orsolya, Bán Miklós, Barta Zoltán
Dátum:2019
ISSN:1217-8837
Megjegyzések:We have studied how individual decisions about timing of breeding and nest location affected the reproductive success of rooks by tracing the formation of a rook breeding colony in Hortobágy NP (Hungary), during the breeding season in 1999. We have found that birds who built nests earlier also laid eggs earlier and had larger clutch size but had no more offspring than late nesters. Distance of the nest from the centre or edge of the colony did not affect the reproductive success though rooks generally settled closer to the centre and further from the edge than it can be expected by assuming random distribution. The colony showed high breeding synchrony since date of egg laying varied less than date of nesting but synchrony did not influence the breeding success. Hatchling's survival rate and number of offspring increased with local nest density and rooks clustered their nests more than it can be expected by random settlement. Nest sites of early and late nesters did not differ regarding the distance from the centre or the edge of the colony but late nesters chose nest sites in more densely populated regions. The results indicate that individuals may follow different strategies to increase their reproductive success. It is prospectively advantageous to build the nest and lay eggs earlier, in turn, it's worth nesting in already more densely nested areas for late beginners. We suggest that a game theoretical approach may be useful if we try to understand the adaptive significance of colonial breeding.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Megjelenés:Acta Zoologica Academiae Scientiarum Hungaricae. - 65 : 1 (2019), p. 31-43. -
További szerzők:Bán Miklós (1975-) (biológus) Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:OTKA(T030343)
OTKA
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DOI
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4.

001-es BibID:BIBFORM018795
Első szerző:Feró Orsolya
Cím:Optimal annual routines : New tools for conservation biology / Orsolya Feró, Philip A. Stephens, Zoltán Barta, John M. McNamara, Alasdair I. Houston
Dátum:2008
Megjegyzések:Many applied problems in ecology and conservation require prediction, and population models are important tools for that purpose. Formerly, the majority of predictive population models were based on matrix models. As the limitations of classical matrix models have become clearer, the use of individual-based models has increased. These models use behavioral rules imposed at the level of the individual to establish the emergent consequences of those rules at the population level. Individual behaviors in such models use an array of different rule types, from empirically derived probabilities to long-term fitness considerations. There has been surprisingly little discussion of the strengths and weaknesses of these different rule types. Here, we consider different strategies for modeling individual behaviors, together with some problems associated with individual-based models. We propose a novel approach based on modeling optimal annual routines. Annual routines allow individual behaviors to be predicted over a whole annual cycle within the context of long-term fitness considerations. Temporal trade-offs between different behaviors are automatically included in annual routine models, overcoming some of the primary limitations of other individual-based models. Furthermore, as well as population predictions, individual behaviors and indices of condition are emergent features of annual routine models. We show that these can be more sensitive to environmental change than population size, offering alternative, repeatable metrics for monitoring population status. Annual routine models provide no panacea for the problems of data limitations in predictive population modeling. However, as a result of their ability to deal with life-history trade-offs, as well as their potential for relatively rapid and accurate validation and parameterization, we suggest that annual routine models have strong potential for predictive population modeling in applied conservation settings.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
environmental change
habitat degradation
individual-based models
migration
molt
optimality
population dynamics
Megjelenés:Ecological Applications. - 18 : 6 (2008), p. 1563-1577. -
További szerzők:Stephens, Philip A. Barta Zoltán (1967-) (biológus, zoológus) McNamara, John M. Houston, Alasdair I.
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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5.

001-es BibID:BIBFORM066148
035-os BibID:(PM)26569455 (WoS)000368964300010 (Scopus)84947750715
Első szerző:Gyuris Enikő
Cím:Personality and ectoparasitic mites (Hemipteroseius adleri) in firebugs (Pyrrhocoris apterus) / Enikő Gyuris, Júlia Fruzsina Hankó, Orsolya Feró, Zoltán Barta
Dátum:2016
ISSN:0376-6357
Megjegyzések:Individuals of the same species often consistently differ in their behaviour across time and context. These stable differences are usually termed 'animal personality'. Parasitism is known to significantly influence the evolution of animal personality at least in part because more explorative individuals may meet parasites more frequently than less explorative ones. Previously, we have demonstrated that consistent individual differences (i.e. boldness, activity, exploration) can be measured in firebugs. As continuation, we examined here the relationship between firebug personality traits and their ectoparasitic mite loadsin a wild population. We showed that bugs that behaved in a more explorative way have more mites and we also found a marginally significant interaction between sex, boldness and activity: bolder and more active female firebugs were more infected. In addition, we experimentally tested whether an artificial infection causes any alteration in the bug's behaviour and whether there is any relationship between firebug personality and immune response. This treatment did not induce any alteration in bugs' personality. We found that bugs become more explorative but less active when repeating the experiment, but at the same time all personality traits (boldness, activity and exploration) were repeatable. Furthermore, firebugs with a stronger immune response behaved more boldly but also less actively.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Firebug
Immune response
Parasitism
Personality
Megjelenés:Behavioural Processes 122 (2016), p. 67-74. -
További szerzők:Hankó Júlia Fruzsina Feró Orsolya Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:K75696
OTKA
TÁMOP-4.2.1./B-09/1/KONV-2010-0007
TÁMOP
TÁMOP-4.2.2./B-10/1-2010-0024
TÁMOP
SROP-4.2.2.B-15/1/KONV-2015-0001
Egyéb
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6.

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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DOI
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7.

001-es BibID:BIBFORM013350
Első szerző:Gyuris Enikő
Cím:Individual behaviour in firebugs (Pyrrhocoris apterus) / Enikő Gyuris, Orsolya Feró, András Tartally, Zoltán Barta
Dátum:2010
Megjegyzések:The concept of animal personalities has recently become of major interest as researchers began to wonder why animals within a given population show consistent behaviour across situations and contexts, what led to the evolution of such behavioural inflexibility and what mechanisms might underlie the phenomenon. A recent model explains individual differences in a population as the result of trade-off between present and future reproduction.We tested this model on the two wing morphs, i.e. short-winged (brachypterous) and long-winged (macropterous) specimens of the firebug (Pyrrhocoris apterus). Since it has been already demonstrated that the two wing morphs differ in their life-history strategies, this species is an ideal subject to test whether the specimens with different life-history strategies have different personalities as well. The results show that individuals behave consistently over time and across contexts, meaning observed bugs do have personalities. We also have found that in females, the two wing morphs have different personalities supporting the theoretical predictions, i.e. winged ones, which are supposed to have lower future reproductive value, are braver and more exploratory. We found no difference between the morphs in males. Differences in reproductive investment might explain this discrepancy between the sexes.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
animal personality
firebug
Egészség- és Környezettudomány
wing dimorphism
male-female differences
life history
Egészség- és Környezettudomány
Megjelenés:Proceedings of the Royal Society. Series B. Biological sciences. - 278 : 1705 (2010), p. 628-633. -
További szerzők:Feró Orsolya Tartally András (1975-) (biológus) Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:TÁMOP-4.2.1./B-09/1/KONV-2010-0007
TÁMOP
Viselkedésökológiai Kutatócsoport
K 75696
OTKA
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
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