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Abstract:

We analysed seasonal variation in the size and composition of groups, and individual behaviour, of a wild population of Greater Rheas (Rhea americana) in the Argentinean pampas. We performed seasonal censuses over 8 years, and made focal observations on 59 individuals from different groups to assess the proportion of time spent in vigilance, feeding, walking, preening or resting, and noted the number of courtship displays, copulations and aggressive interactions. Rheas were solitary or formed groups of 2-20 individuals. Mean typical group-size (TGS) over the year was 7.61 birds but varied significantly with season, TGS decreasing during the breeding season (spring), possibly owing to formation of harems. TGS of males decreased in spring whereas TGS of females did not vary seasonally. During spring, individuals spent more time vigilant and less time feeding, and were involved in many courtship interactions. Most aggression (72%) was between males and mainly occurred during winter and spring, suggesting strong intrasexual competition. Social organisation and group dynamics appear to be profoundly affected by the mating system of the Greater Rhea. © Royal Australasian Ornithologists Union 2008.

Registro:

Documento: Artículo
Título:Seasonal variation in social organisation and diurnal activity budget of the Greater Rhea (Rhea americana) in the Argentinean pampas
Autor:Carro, M.E.; Fernández, G.J.
Filiación:Laboratorio de Ecología Y Comportamiento Animal, Departamento de Ecología, Genética Y Evolución, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
Palabras clave:activity pattern; aggression; bird; competition (ecology); copulation; courtship; diurnal activity; feeding behavior; group size; intrasexual interaction; reproductive strategy; seasonal variation; social organization; vigilance; wild population; Argentina; South America; Aves; Rhea; Rhea americana; Rheiformes
Año:2008
Volumen:108
Número:2
Página de inicio:167
Página de fin:173
DOI: http://dx.doi.org/10.1071/MU07052
Título revista:Emu
Título revista abreviado:Emu
ISSN:01584197
CODEN:EMUMA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01584197_v108_n2_p167_Carro

Referencias:

  • Alexander, R., The evolution of social behaviour (1974) Annual Review of Ecology and Systematics, 5, pp. 325-383. , doi:10.1146/annurev.es.05. 110174.001545
  • Astley, H.D., Polyandry in the rhea (1907) Aviculture Magazine, 5, pp. 267-269
  • Bertram, B.C.R., Living in groups: Predators and prey (1978) Behavioural Ecology: An Evolutionary Approach, pp. 64-96. , 1st edn, Eds J. R. Krebs and N. B. Davies, pp, Blackwell Scientific Publications: Oxford, UK
  • Bertram, B.C.R., Vigilance and group size in ostriches (1980) Animal Behaviour, 28, pp. 278-286. , doi:10.1016/S0003-3472(80)80030-3
  • Boland, C.R.J., An experimental test of predator detection rates using groups of free-living emus (2003) Ethology, 109, pp. 209-222. , doi:10.1046/j.1439-0310.2003.00860.x
  • Bon, R., Rideau, C., Villaret, J.-C., Joachim, J., Segregation is not only a matter of sex in Alpine ibex, Capra ibex ibex (2001) Animal Behaviour, 62, pp. 495-504. , doi:10.1006/anbe.2001.1776
  • Bruning, D.F., Social structure and reproductive behavior of the Greater Rhea (1974) Living Bird, 13, pp. 251-294
  • Burger, J., Gochfeld, M., Effects of group size and sex on vigilance in ostriches (Struthio camelus): Antipredator strategy or mate competition? (1988) Ostrich, 59, pp. 14-20
  • Caro, T., (2005) Antipredator Defences in Birds and Mammals, , Chicago University Press: Chicago, IL
  • Carro, M.E., (2006) Comportamiento de vigilancia del Ñandú Común, Rhea americana: Ventajas de la vida en grupo, , B.Sc. Thesis, Universidad de Buenos Aires, Argentina
  • Chapman, C.A., Wrangham, R.W., Chapman, L.J., Ecological constraints on group size: An analysis of spider monkey and chimpanzee subgroups (1995) Behavioural Ecology and Sociobiology, 36, pp. 59-70. , doi:10.1007/BF00175729
  • Clutton-Brock, T.H., Mammalian mating systems (1989) Proceedings of the Royal Society of London. Series B: Biological Sciences, 236, pp. 339-372
  • Clutton-Brock, T.H., Harvey, P.H., Primate ecology and social organization (1977) Journal of Zoology, 183, pp. 1-39
  • Clutton-Brock, T.H., Harvey, P.H., Mammals, resources and reproductive strategies (1978) Nature, 273, pp. 191-195. , doi:10.1038/273191a0
  • Clutton-Brock, T.H., Guinness, F.E., Albon, S.D., (1982) Red Deer: Behaviour and Ecology of Two Sexes, , Edinburgh University Press: Edinburgh
  • Clutton-Brock, T.H., Iason, G.R., Guinness, F.E., Sexual segregation and density-related changes in habitat use in male and female red deer (Cervus elaphus) (1987) Journal of Zoology, 211, pp. 275-289
  • Codenotti, T.L., Fenología reproductiva y biometría de nidos, huevos y pollos del ñandú, Rhea americana en Rio Grande do Sul, Brasil. (1997) Hornero, 14, pp. 211-223
  • Codenotti, T. L., and Álvarez, F. (2001). Mating behavior of the male Greater Rhea. Wilson Bulletin 113, 85-89. doi:10.1676/0043-5643 (2001)113[0085:MBOTMG]2.0.CO;2; Conradt, L., Measuring the degree of sexual segregation in groupliving animals (1998) Journal of Animal Ecology, 67, pp. 217-226. , doi:10.1046/j.1365-2656.1998.00183.x
  • Conradt, L., Clutton-Brock, T.H., Thomson, D., Habitat segregation in ungulates: Are males forced into suboptimal foraging habitats through indirect competition by females? (1999) Oecologia, 119, pp. 367-377. , doi:10.1007/s004420050797
  • Crawley, M., (1993) Glim for Ecologists, , Blackwell Scientific Publications: Oxford, UK
  • Davis, S.J.J.F., (2002) Ratites and Tinamous, , Oxford University Press: Oxford, UK
  • Emlen, S.T., Oring, L.W., Ecology, sexual selection and the evolution of mating systems (1977) Science, 197, pp. 215-223. , doi:10.1126/science.327542
  • Fernández, G.J., Mermoz, M.E., Social copulation solicitation display of female Greater Rheas (2003) Wilson Bulletin, 115, pp. 467-470. , doi:10.1676/03-060
  • Fernández, G.J., Reboreda, J.C., Effect of clutch size and time of the breeding season on the reproductive success of Greater Rheas, Rhea americana (1998) Auk, 115, pp. 340-348
  • Fernández, G. J., and Reboreda, J. C. (2003). Male parental care in Greater Rheas (Rhea americana) in Argentina. Auk 120, 418-428. doi:10.1642/0004-8038(2003)120[0418:MPCIGR]2.0.CO;2; Fernández, G.J., Capurro, A.F., Reboreda, J.C., Effect of group size on individual and collective vigilance in Greater Rheas (2003) Ethology, 109, pp. 413-425. , doi:10.1046/j.1439-0310.2003.00887.x
  • Geist, V., On the relationship of social evolution and ecology in ungulates (1974) American Zoologist, 14, pp. 205-220
  • Hammer, W.M., Parrish, J.K., Is the sum of the parts equal to the whole? The conflict between individuality and group membership (1997) Animal Groups in Three Dimensions, pp. 165-173. , Eds W. M. Hammer and J. K. Parrish, pp, Cambridge University Press: Cambridge, UK
  • Handford, P., Mares, M.A., The mating systems of ratites and tinamous: An evolutionary perspective (1985) Biological Journal of the Linnaean Society, 25, pp. 77-104. , doi:10.1111/j.1095-8312.1985.tb00387.x
  • Hudson, W.H., (1920) Birds of La Plata, , J. M. Dent & Sons: London
  • Jarman, P.J., The social organization of antelope in relation to their ecology (1974) Behaviour, 48, pp. 215-267. , doi:10.1163/156853974X00345
  • Kie, J.G., Bowyer, R.T., Sexual segregation in white-tailed deer: Density-dependent changes in use of space, habitat selection, and dietary niche (1999) Journal of Mammalogy, 80, pp. 1004-1020. , doi:10.2307/1383271
  • Loe, L.E., Irvine, R.J., Bonenfant, C., Stien, A., Langvatn, R., Albon, S.D., Mysterud, A., Stensth, N.C., Testing five hypotheses of sexual segregation in an arctic ungulate (2006) Journal of Animal Ecology, 75, pp. 485-496. , doi:10.1111/j.1365-2656.2006.01069.x
  • Lombardi, C.M., Feeding and vigilance in wild Greater Rhea harems (1994) Bird Behaviour, 10, pp. 29-35
  • Martella, M.B., Renison, D., Navarro, J.L., Vigilance in the Greater Rhea: Effects of vegetation height and group size (1995) Journal of Field Ornithology, 66, pp. 215-220
  • Ottoni, E.B., EthoLog 2.2 - a tool for the transcription and timing of behavior observation sessions (2000) Behavior Research Methods, Instruments, & Computers, 32, pp. 446-449
  • Pulliam, H.R., Caraco, T., Living in groups: Is there and optimal group size? (1984) Behavioural Ecology: An Evolutionary Approach, pp. 122-147. , 2nd edn, Eds J. R. Krebs and N. D. Davies, pp, Blackwell Science: Oxford, UK
  • Raikow, R.J., Maintenance behavior of the Common Rhea (1968) Wilson Bulletin, 80, pp. 312-319
  • Raikow, R.J., Sexual and agonistic behavior of the Common Rhea (1969) Wilson Bulletin, 81, pp. 196-206
  • Reboreda, J.C., Fernández, G.J., Sexual, seasonal and group size differences in the allocation of time between vigilance and feeding in the Greater Rhea, Rhea americana (1997) Ethology, 103, pp. 198-207
  • Ritz, D.A., Costs and benefits as a function of group size: Experiments on a swarming mysid Paramesopodopsis rufa Fenton (1997) Animal Groups in Three Dimensions, pp. 194-206. , Eds W. M. Hammer and J. K. Parrish, pp, Cambridge University Press: Cambridge, UK
  • Ruckstuhl, K.E., Neuhaus, P., Sexual segregation in ungulates: A new approach (2000) Behaviour, 137, pp. 361-377. , doi:10.1163/156853900502123
  • Ruckstuhl, K.E., Neuhaus, P., Sexual segregation in ungulates: A comparative test of three hypotheses (2002) Biological Reviews of the Cambridge Philosophical Society, 77, pp. 77-96
  • Shi, J., Dunbar, R.I.M., Buckland, D., Miller, D., Dynamics of grouping patterns and social segregation in feral goats (Capra hircus) on the Isle of Rum, NW Scotland (2005) Mammalia, 69, pp. 185-199. , doi:10.1515/mamm.2005.016
  • Soriano, A., León, R.J.C., Sala, O.E., Lavado, R.S., Deregibus, V.A., Cauhepe, M.A., Scaglia, O.A., Lemcoff, J.H., Rio de la Plata Grasslands (1991) Ecosystems of the World 8A. Natural Grasslands, pp. 367-407. , Ed. R. T. Coupland, pp, Elsevier: London
  • Wilson, K., Hardy, I.C.W., Statistical analysis of sex ratios: An introduction (2002) Sex Ratios: Concepts and Research Methods, pp. 48-92. , Ed. I. C. W. Hardy, pp, Cambridge University Press: Cambridge, UK

Citas:

---------- APA ----------
Carro, M.E. & Fernández, G.J. (2008) . Seasonal variation in social organisation and diurnal activity budget of the Greater Rhea (Rhea americana) in the Argentinean pampas. Emu, 108(2), 167-173.
http://dx.doi.org/10.1071/MU07052
---------- CHICAGO ----------
Carro, M.E., Fernández, G.J. "Seasonal variation in social organisation and diurnal activity budget of the Greater Rhea (Rhea americana) in the Argentinean pampas" . Emu 108, no. 2 (2008) : 167-173.
http://dx.doi.org/10.1071/MU07052
---------- MLA ----------
Carro, M.E., Fernández, G.J. "Seasonal variation in social organisation and diurnal activity budget of the Greater Rhea (Rhea americana) in the Argentinean pampas" . Emu, vol. 108, no. 2, 2008, pp. 167-173.
http://dx.doi.org/10.1071/MU07052
---------- VANCOUVER ----------
Carro, M.E., Fernández, G.J. Seasonal variation in social organisation and diurnal activity budget of the Greater Rhea (Rhea americana) in the Argentinean pampas. Emu. 2008;108(2):167-173.
http://dx.doi.org/10.1071/MU07052