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001-es BibID:	BIBFORM081273
Első szerző:	Gerencsér Linda
Cím:	The effect of reward-handler dissociation on dogs' obedience performance in different conditions / Linda Gerencsér, András Kosztolányi, Joni Delanoeije, Ádám Miklósi
Dátum:	2016
ISSN:	0168-1591
Megjegyzések:	Dogs' responsiveness to instructions of the handler is known to be influenced by several factors. In this study we examined whether reward-handler dissociation has an effect on the obedience performance of family dogs with basic training history. We looked at situations involving human-dog interactions under controlled laboratory settings by measuring dogs' obedience performance to two known commands (?sit' and ?down') in several different conditions. For two different groups of dogs, we manipulated the source of the food reward: it was provided either by the handler or by a remote controlled food dispenser device during a practising period, when the handler stood in the dog's close vicinity (0.5 m). In three different test conditions the position of the handler was manipulated: he/she stood further away (3 m) from the dog either beside a screen, hid behind the screen or was outside of the room. No food reward was provided during the test trials, which were interrupted by so called reminder sessions, where dog-handler dyads practiced both commands in close vicinity to each other and food reward was also involved. We found that the performance of dogs that experienced receiving food reward from the handler was significantly poorer during the test conditions, i.e. in contexts with increased distance between them and the handler (including handler out of sight), as compared to their performance during the reminder sessions in the handlers' close vicinity. Experience with receiving food reward form the dispenser device lessened the difference in dogs' obedience between the test conditions and reminder sessions, and moreover, it also revealed a more prompt response to the ?sit' than to the ?down' commands. Thus our results show that reward-handler dissociation seems to affect dogs' obedience performance in the investigated conditions.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Behaviour Obedience Dog Food reward Training
Megjelenés:	Applied Animal Behaviour Science. - 174 (2016), p. 103-110. -
További szerzők:	Kosztolányi András (1971-) (biológus) Delanoeije, Joni Miklósi Ádám
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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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
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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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
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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