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1.

001-es BibID:BIBFORM054066
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:Social Role Specialization Promotes Cooperation between Parents / Zoltán Barta, Tamás Székely, András Liker, Freya Harrison
Dátum:2014
Megjegyzések:Biparental care of offspring is a widespread social behavior, and various ecological, life-history, and demographic factors have been proposed to explain its evolution and maintenance. Raising offspring generally requires several types of care (e.g., feeding, brooding, and defense), and males and females often specialize in providing diffferent types of care. However, theoretical models of care often assume that care is a single variable and hence that a unit of care by the mother is interchangable with a unit of care by the father. We hypothesize that the ability of one parent to provide all types of care may be limited by nonadditive costs or by sex-based asymmetries in the costs of particular care types. Using an individual-based simulation, we show that synergistic costs of investing in two tasks or negligible sex-based cost asymmetries select for task specialization and biparental care. Biparental care persists despite intense sexual selection and sex-based mortality, suggesting that previous models make overly restrictive predictions of the conditions under which cooperation can be maintained. Our model provides a mechanistic underpinning for published models that show that the synergistic benefits of individuals cooperating can stabilize cooperation, both in the context of parental care and in other social scenarios.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
evolutionary simulation
mortality
parental care
sexual selection
social evolution
Élettudományok - Biológiai tudományok
Megjelenés:The american naturalist. - 183 : 6 (2014), p. 747-761. -
További szerzők:Székely Tamás (1959-) (biológus) Liker András Harrison, Freya
Pályázati támogatás:MTA-DE Lendület
MTA
Viselkedésökológiai Kutatócsoport
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
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2.

001-es BibID:BIBFORM022957
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:Sexual Conflict about Parental Care : the Role of Reserves / Zoltán Barta, Alasdair I. Houston, John M. McNamara, Tamás Székely
Dátum:2002
Megjegyzések:Parental care often increases the survival of offspring, but it is costly to parents. Because of this trade-off, a sexual conflict over care arises. The solution to this conflict depends on the interactions between the male and female parents, the behavior of other animals in the population, and the individual differences within a sex. We take an integrated approach and develop a state-dependent dynamic game model of parental care. The model investigates a single breeding season in which the animals can breed several times. Each parent's decision about whether to care for the brood or desert depends on its own energy reserves, its mate's reserves, and the time in the season. We develop a fully consistent solution in which the behavior of an animal is the best given the behavior of its mate and of all other animals in the population. The model predicts that females may strategically reduce their own reserves so as to "force" their mate to provide care. We investigate how the energy costs of caring and searching for a mate, values of care (how the probability of offspring survival depends on the pattern of care), and population sex ratio influence the pattern of care over the breeding season.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
sexual conflict
parental care
offspring desertion
dynamic game
reserves
body mass regulation
Megjelenés:American Naturalist. - 159 : 6 (2002), p. 687-705. -
További szerzők:Houston, Alasdair I. McNamara, John M. Székely Tamás (1959-) (biológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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3.

001-es BibID:BIBFORM023378
Első szerző:Barta Zoltán (nukleáris medicina szakorvos)
Cím:Daily Patterns of Optimal Producer and Scrounger Use under Predation Hazard : A State-Dependent Dynamic Game Analysis / Zoltán Barta, Luc-Alain Giraldeau
Dátum:2000
Megjegyzések:Feeding in groups often gives rise to joining: feeding from other's discoveries. The joining decision has been modeled as a producer-scrounger game where the producer strategy consists of searching for one's food and the scrounger strategy consists of searching for food discovered by others. Previous models revealed that the evolutionarily stable proportion of scrounging mostly depends on the fraction of each food patch available only to its producer. These early models are static and state independent and are therefore unable to explore whether the time of day, the animal's state, and the degree of predation hazard influence an individual's decision of whether to use the producer or scrounger strategy. To investigate these issues, we developed a state-dependent dynamic producer-scrounger game model. The model predicts that, early in the day, low reserves promote a preference for the scrounger strategy, while the same condition late in the day favors the use of the producer strategy. Under rich and clumped food, the availability of scrounging can improve the daily survival of any average group member. The model suggests only weak effects of predation hazard on the use of scrounging. Future developments should consider the effects of dominance asymmetries and allowing foragers a choice between foraging alone or in a group harboring an evolutionarily stable frequency of scrounger
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
social foraging
producer-scrounger game
state-dependent dynamic game
Megjelenés:The American Naturalist 155 : 4 (2000), p. 570-582. -
További szerzők:Giraldeau, Luc-Alain
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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4.

001-es BibID:BIBFORM018790
Első szerző:McNamara, John M.
Cím:A Theoretical Investigation of the Effect of Latitude on Avian Life Histories / John M. McNamara, Zoltán Barta, Martin Wikelski, Alasdair I. Houston
Dátum:2008
Megjegyzések:Tropical birds lay smaller clutches than birds breeding in temperate regions and care for their young for longer. We develop a model in which birds choose when and how often to breed and their clutch size, depending on their foraging ability and the food availability. The food supply is density dependent. Seasonal environments necessarily have a high food peak in summer; in winter, food levels drop below those characteristic of constant environments. A bird that cannot balance its energy needs during a week dies of starvation. If adult predation is negligible, birds in low seasonal environments are constrained by low food during breeding seasons, whereas birds in high seasonal environments die during the winter. Low food seasonality selects for small clutch sizes, long parental care times, greater age at first breeding, and high juvenile survival. The inclusion of adult predation has no major effect on any life-history variables. However, increased nest predation reduces clutch size. The same trends with seasonality are also found in a version of the model that includes a condition variable. Our results show that seasonal changes in food supply are sufficient to explain the observed trends in clutch size, care times, and age at first breeding.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
annual routine, clutch size, energy balance, parental care.
Megjelenés:The American Naturalist. - 172 : 3 (2008), p. 331-345. -
További szerzők:Barta Zoltán (1967-) (biológus, zoológus) Wikelski, Martin Houston, Alasdair I.
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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5.

001-es BibID:BIBFORM081251
Első szerző:Pilakouta, Natalie
Cím:Effects of Prior Contest Experience and Contest Outcome on Female Reproductive Decisions and Offspring Fitness / Natalie Pilakouta, Cerian Halford, Rita Rácz, Per T. Smiseth
Dátum:2016
ISSN:0003-0147
Megjegyzések:Winning or losing a prior contest can influence the outcome of future contests, but it might also alter subsequent reproductive decisions. For example, losers may increase their investment in the current breeding attempt if losing a contest indicates limited prospects for future breeding. Using the burying beetle Nicrophorus vespilloides, we tested whether females adjust their prehatching and posthatching reproductive effort after winning or losing a contest with a same-sex conspecific. Burying beetles breed on carcasses of small vertebrates for which there is fierce intrasexual competition. We found no evidence that winning or losing a contest influenced reproductive investment decisions in this species. Instead, we show that a female's prior contest experience (regardless of its outcome) influenced the amount of posthatching care provided, with downstream consequences for the female's reproductive output; both winners and losers spent more time provisioning food to their offspring and produced larger broods than females with no contest experience. We discuss the wider implications of our findings and present a conceptual model linking contestmediated adjustments in parental investment to population-level processes. We propose that the frequency of intraspecific contests could both influence and be influenced by population dynamics in species where contest experience influences the size and/or number of offspring produced.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
fighting contest
Nicrophorus vespilloides
parental care
population density
reproductive investment
winner-loser effects
Megjelenés:American Naturalist. - 188 : 3 (2016), p. 319-328. -
További szerzők:Halford, Cerian Rácz Rita (1989-) (biológus) Smiseth, Per T.
Internet cím:Szerző által megadott URL
DOI
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6.

001-es BibID:BIBFORM119782
035-os BibID:(Scopus)85132982617 (WoS)00081515140000
Első szerző:Song, Zitan
Cím:Evolution of Social Organization: Phylogenetic Analyses of Ecology and Sexual Selection in Weavers / Zitan Song, András Liker, Yang Liu, Tamás Székely
Dátum:2022
ISSN:0003-0147
Megjegyzések:Crook published a landmark study on the social organization of weavers (or weaverbirds, family Ploceidae) that contributed to the emergence of sociobiology, behavioral ecology, and phylogenetic comparative methods. By comparing ecology, spatial distribution, and mating systems, Crook suggested that the spatial distribution of food resources and breeding habitats influence weaver aggregation during both the nonbreeding season (flocking vs. solitary foraging) and the breeding season (colonial vs. solitary breeding), and the latter in turn impacts mating systems and sexual selection. Although Crook's study stimulated much follow-up research, his conclusions have not been scrutinized using phylogenetically controlled analyses. We revisited Crook's hypotheses using modern phylogenetic comparative methods on an extended data set of 107 weaver species. We showed that both diet and habitat type are associated with spatial distribution and that the latter predicts mating system, consistent with Crook's propositions. The best-supported phylogenetic path model also supported Crook's arguments and uncovered a direct relationship between nonbreeding distribution and mating system. Taken together, our phylogenetically corrected analyses confirm Crook's conjectures on the roles of ecology in social organizations of weavers; however, our analyses also uncovered an association between nonbreeding distributions and mating systems, which was not envisaged by Crook.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Coloniality
Pair bonding
Parental care
Sexual selection
Sexual size dimorphism
Social behavior
Megjelenés:American Naturalist. - 200 : 2 (2022), p. 250-263. -
További szerzők:Liker András Liu, Yang Székely Tamás (1959-) (biológus)
Pályázati támogatás:KKP-126949
Egyéb
K-116310
Egyéb
KH 130430
Egyéb
TKP2020-IKA-07
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
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