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Honza M, Koleček J, Piálek L, Piálková R, Požgayová M, Procházka P, Štětková G, Jelínek V, Hughes AE, Šulc M. Multiple parasitism in an evictor brood parasite: patterns revealed by long-term monitoring, continuous video recording, and genetic analyses. Behav Ecol Sociobiol 2022. [DOI: 10.1007/s00265-022-03270-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Koleček J, Piálková R, Piálek L, Šulc M, Hughes AE, Brlík V, Procházka P, Požgayová M, Capek M, Sosnovcová K, Štětková G, Valterová R, Honza M. Spatiotemporal patterns of egg laying in the common cuckoo. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.04.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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López AV, Reboreda JC, Fiorini VD, Gerschenson LN, Hauber ME. A comparative study of the structural and mechanical properties of avian eggshells among hosts of obligate brood parasitic cowbirds (genus Molothrus). Biol J Linn Soc Lond 2021. [DOI: 10.1093/biolinnean/blab041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Obligate avian brood parasites depend on hosts for parental care, which in turn suffer fitness losses as a result of parasitism. Mechanisms by which brood parasitic cowbirds (Molothrus spp.) reduce host breeding success include the puncture (M. rufoaxillaris and M. bonariensis) or removal (M. ater) of the eggs of the host. Our working hypothesis is that the host eggs’ mechanical strength and their size and shape in species with higher frequency of parasitism covaries with the cowbird’s strategy to reduce host clutch size. Our results, obtained through phylogenetic analyses based on egg 2D geometric morphometry and eggshell mechanical and ultrastructural measurements, suggest that egg-puncturer behaviour has led to an increase in the strength of the host’s eggshell, which might make them more difficult to be pierced. We also characterized larger, more rounded and asymmetrical eggs in frequent hosts of M. ater, which might be more difficult to be removed. These interspecific host egg and shell traits were also positively affected by the frequency of parasitism, indicating that species-specific patterns of parasitic costs select for respective anti-parasitic defences in hosts.
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Affiliation(s)
- Analía V López
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (C1428EGA) Ciudad Autónoma de Buenos Aires,Argentina
| | - Juan C Reboreda
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (C1428EGA) Ciudad Autónoma de Buenos Aires,Argentina
- IEGEBA - CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (C1428EGA) Ciudad Autónoma de Buenos Aires, Argentina
| | - Vanina D Fiorini
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (C1428EGA) Ciudad Autónoma de Buenos Aires,Argentina
- IEGEBA - CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (C1428EGA) Ciudad Autónoma de Buenos Aires, Argentina
| | - Lía N Gerschenson
- Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (C1428EGA) Ciudad Autónoma de Buenos Aires, Argentina
| | - Mark E Hauber
- Department of Evolution, Ecology and Behavior, School of Integrative Biology, University of Illinois, Urbana‒Champaign, Urbana, IL, USA
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Ursino CA, Strong MJ, Reboreda JC, Riehl C. Genetic patterns of repeat and multiple parasitism by screaming cowbirds, a specialist brood parasite. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Size matters: shiny cowbirds secure more food than host nestmates thanks to their larger size, not signal exaggeration. Anim Behav 2019. [DOI: 10.1016/j.anbehav.2019.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Rojas Ripari JM, Segura LN, Reboreda JC, De Mársico MC. Non-mimetic shiny cowbird nestlings escape discrimination by baywings in absence of host nest mates. Behav Ecol Sociobiol 2019. [DOI: 10.1007/s00265-019-2749-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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de la Colina MA, Pompilio L, Hauber ME, Reboreda JC, Mahler B. Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition. Anim Cogn 2018; 21:301-305. [PMID: 29372341 DOI: 10.1007/s10071-018-1161-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/15/2017] [Accepted: 12/26/2017] [Indexed: 10/18/2022]
Abstract
Obligate avian brood parasites lay their eggs in nests of other host species, which assume all the costs of parental care for the foreign eggs and chicks. The most common defensive response to parasitism is the rejection of foreign eggs by hosts. Different cognitive mechanisms and decision-making rules may guide both egg recognition and rejection behaviors. Classical optimization models generally assume that decisions are based on the absolute properties of the options (i.e., absolute valuation). Increasing evidence shows instead that hosts' rejection decisions also depend on the context in which options are presented (i.e., context-dependent valuation). Here we study whether the chalk-browed mockingbird's (Mimus saturninus) rejection of parasitic shiny cowbird (Molothrus bonariensis) eggs is a fixed behavior or varies with the context of the clutch. We tested three possible context-dependent mechanisms: (1) range effect, (2) habituation to variation, and (3) sensitization to variation. We found that mockingbird rejection of parasitic eggs does not change according to the characteristics of the other eggs in the nest. Thus, rejection decisions may exclusively depend on the objective characteristics of the eggs, meaning that the threshold of acceptance or rejection of a foreign egg is context-independent in this system.
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Affiliation(s)
- M A de la Colina
- Departamento de Ecología, Genética y Evolución and IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - L Pompilio
- Departamento de Ecología, Genética y Evolución and IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - M E Hauber
- Department of Animal Biology, School of Integrative Biology, University of Illinois, Urbana-Champaign, IL, 61801, USA
| | - J C Reboreda
- Departamento de Ecología, Genética y Evolución and IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - B Mahler
- Departamento de Ecología, Genética y Evolución and IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.
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Moskát C, Elek Z, Bán M, Geltsch N, Hauber ME. Can common cuckoos discriminate between neighbours and strangers by their calls? Anim Behav 2017. [DOI: 10.1016/j.anbehav.2017.02.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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