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Abstract:

Ten sampling sites were selected to represent six distinct habitat types used by capybaras ('clean' lagoons, 'dirty' lagoons, cutwaters, fens and marshes, gallery forests, and erosion ditches). The sites were sampled during winter (July and August); densities were expressed as number of capybaras per linear km of shoreline (C/LKS). The sites were classified as protected from poachers (P), under light hunting pressure (LHP), and under heavy hunting pressure (HHP). 'Clean' protected (P) lagoons had three times as many capybaras as LHP ones (30.7 and 10.9 C/LKS, respectively), and thirty times those under HHP (1.0 C/LKS). Protected marshes and 'dirty' lagoons had even higher capybara densities (52.5 and 50.0 C/LKS, respectively). Gallery forests under LHP had low densities (6.3 C/LKS), and protected cutwaters intermediate densities (27.5 C/LKS). Erosion ditches had exceptionally high densities (900 C/LKS), probably because cattle were fenced out, reducing forage competition. These densities, when converted to the standard unit area measurement (individuals/ha), were similar to those obtained by other researchers in the Brazilian Pantanal, and somewhat smaller than those in the Venezuelan Llanos. Mean number of capybaras per group remained relatively constant in all habitats (averages ranged between 9.2 and 11.8 individuals/group) but its coefficient of variation was much higher in LHP sites, probably because social structure was altered severely by hunting. The overall ratio of young to adults and juveniles was 1:7.4. In one of the sites, 13 of 34 groups (38.2%) were with young (average of 17 capybaras per group, 4.7 of which were young), confirming that this species can reproduce all year long. © 1993 SPB Academic Publishing bv.

Registro:

Documento: Artículo
Título:Assessment of capybara (Hydrochoerus hydrochaeris) populations in the wetlands of Corrientes, Argentina
Autor:Quintana, R.D.; Rabinovich, J.E.
Filiación:GESER (Grupo de Estudios sobre Ecología Regional), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, Buenos Aires, 1428, Argentina
Instituto Nacional de Investigación y Diagnóstico de la Enfermedad de Chagas, Casilla 1395, Correo Central, Buenos Aires, 1000, Argentina
Palabras clave:Argentina; capybara; Corrientes; Hydrochoerus hydrochaeris; poaching; social groups; wetlands management; capybara; population structure; wetland; Argentina, Corrientes; Hydrochoerus hydrochaeris
Año:1993
Volumen:2
Número:4
Página de inicio:223
Página de fin:230
DOI: http://dx.doi.org/10.1007/BF00188156
Título revista:Wetlands Ecology and Management
Título revista abreviado:Wetlands Ecol Manage
ISSN:09234861
CODEN:WEMAE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09234861_v2_n4_p223_Quintana

Referencias:

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  • Cabrera, A., Fitogeografía de la República Argentina (1971) Bol. Soc. Arg. Bot., 14 (1-2), pp. 1-42
  • Cordero, G., Ojasti, J., Comparison of capybara populations of open and forested habitats (1981) J. Wildlife Man., 45 (1), pp. 267-271
  • Daniel, W.W., (1978) Applied non-parametric statistics, , Houghton Mifflin Co., Boston
  • De Azcárate, T., Sociobiologá y manejo del chiguire (1981) Doñana Acta Vertebrata, 7, pp. 1-228
  • Escobar, A., González Jiménez, E., Estudio de la competencia alimenticia de los herbívoros mayores del Llano inundable, con referencia especial al chigüire (Hydrochaeris hydrochaeris) (1976) Agron. Trop., 26 (3), pp. 215-227
  • F.A.A. (Fuerza Aérea Argentina). 1972. Estadísticas climatológicas, 1951–1960. Serie B, No. 6: 156 pp; Herrera, E. 1985. Coprophagy in the capybara, Hydrochoerus hydrochaeris. J. Zool. (London): 616–619; Herrera, E.1986. Vida en grupos y ecología del capibara. Resúmenes del Congreso Latinoamericano de Zoología (Viña del Mar, Chile). P. 269; Herrera, E. and Macdonald, D. 1987. Group stability and the structure of capybara populations. In: Harris, S. (ed.), Population studies of mammals, pp. 115–130. Symposium of the Zoological Society of London, Vol. 58. London; Herrera, E., Macdonald, D., Resource utilization and territoriality in group-living capybaras (Hydrochoerus hydrochaeris) (1989) J. An. Ecol., 58, pp. 667-679
  • Jorgeson, J., Notes on the ecology and behaviour of capybaras in Northeastern Columbia (1986) Vida Silvestre Neotropical, 1, pp. 31-40
  • Lewontin, R.C., Levins, R., On the characterization of density and resource availability (1989) Am. Nat., 134, pp. 513-524
  • Macdonald, D., Dwindling resources and the social behaviour of capybaras (Hydrochoerus hydrochaeris)(Mammalia) (1981) Journal of Zoology, 194, pp. 371-391
  • McNaughton, S., Animals in herds, plant form and coevolution (1984) Am. Nat., 124, pp. 863-886
  • Ojasti, J. 1973. Estudio biológico del chigüire o capibara. Fondo Nacional de Investigaciones Agropecuarias (FONAIAP), Caracas. 275 pp; Ojasti, J., Sosa Burgos, L., Density regulation in populations of capybara (1985) Acta Zool. Fennica, 173, pp. 81-83
  • Quintana, R. 1989. Informe sobre las actividades realizadas en la República de Venezuela entre 9/1/89 y el 21/3/89 en el marco del convenio CONICET (Argentina) y CONICIT (Venezuela): ‘Intercambio Científico-Técnico sobre Aprovechamiento de la especie Carpincho (Hydrochaeris hydrochaeris)’. 61 pp; Schaller, G., Crawshaw, P., Social Dynamics of capybara population (1981) Saugetierkundliche Mitteilungen, 29, pp. 3-16

Citas:

---------- APA ----------
Quintana, R.D. & Rabinovich, J.E. (1993) . Assessment of capybara (Hydrochoerus hydrochaeris) populations in the wetlands of Corrientes, Argentina. Wetlands Ecology and Management, 2(4), 223-230.
http://dx.doi.org/10.1007/BF00188156
---------- CHICAGO ----------
Quintana, R.D., Rabinovich, J.E. "Assessment of capybara (Hydrochoerus hydrochaeris) populations in the wetlands of Corrientes, Argentina" . Wetlands Ecology and Management 2, no. 4 (1993) : 223-230.
http://dx.doi.org/10.1007/BF00188156
---------- MLA ----------
Quintana, R.D., Rabinovich, J.E. "Assessment of capybara (Hydrochoerus hydrochaeris) populations in the wetlands of Corrientes, Argentina" . Wetlands Ecology and Management, vol. 2, no. 4, 1993, pp. 223-230.
http://dx.doi.org/10.1007/BF00188156
---------- VANCOUVER ----------
Quintana, R.D., Rabinovich, J.E. Assessment of capybara (Hydrochoerus hydrochaeris) populations in the wetlands of Corrientes, Argentina. Wetlands Ecol Manage. 1993;2(4):223-230.
http://dx.doi.org/10.1007/BF00188156