Population demography of Oxymycterus rufus [Rodentia: Cricetidae] inhabiting a patchy environment of the delta of the Parana River, Argentina

• Autorzy: Cueto V.R. , Piantanida M.J. , Cagnoni M.
• Języki publikacji: EN

Abstrakty

EN

We employed a live-trapping grid encompassing several discrete vegetation patches to analyze spatial differences in the demographic structure of an Oxymycterus rufus (Fischer, 1814) population living on the delta of the Parana River, Argentina. Abun­dance, residence and reproduction of both females and males have been associated with microhabitats where food (measured through the availability of arthropods) was more abundant, and were not associated with the plant cover of those microhabitats. Our results emphasize the importance of food availability in the spatial distribution of resident and reproductive individuals, and hence in the survival and breeding success of their populations in the Parana delta area.

Słowa kluczowe

EN

Argentina; demography; habitat selection; Parana River; Cricetidae; Rodentia; rodent; population; Oxymycterus rufus

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 1995
• Tom: 40
• Numer: 2
• Opis fizyczny: p.123-130,fig.

Twórcy

autor

Cueto V.R.

• Museo Argentino de Ciencias Naturales, Av.Angel Gallardo 470, 1405 Buenos Aires, Argentina

autor

Piantanida M.J.

autor

Cagnoni M.

Bibliografia

• Anderson P. K. 1980.- Evolutionary implications of microtine behavioral systems on the ecological stage. Biologist 62: 70-88.
• Anderson P. K. 1989. Dispersal in rodents: a resident fitness hypothesis. Special Publications of American Society of Mammalogy 9: 1-141.
• Barlow J. C. (1969). Observations of the biology of rodents in Uruguay. Life Sciences Contributions Royal Ontario Museum 75: 1-59.
• Batzli G. O. and Lesiutre C. 1991. The influence of high quality food on habitat use by arctic microtine rodents. Oikos 60: 299-306.
• Birney E. C., Grant W. E. and Baird D. D. 1976. Importance of vegetative cover to cycles of Microtus populations. Ecology 57: 1043-1051.
• Bonaventura S. M., Piantanida M. J., Gurini L. and Sànchez López M. I. 1991. Habitat selection in population of cricetine rodents in the region Delta (Argentina). Mammalia 55: 339-354.
• Bondrup-Nielsen S. 1987. Demography of Clethrionomys gapperi in different habitats. Canadian Journal of Zoology 65: 167-177.
• Burkart A. 1957. Ojeada sinoptica sobre la vegetación del Delta del Rio Parana. Darwiniana 11: 457-561.
• Carleton M. D. 1973. A survey of gross stomach morphology in New World Cricetinae (Rodentia, Muroidea), with comments on functional interpretations. Miscellaneous Publications Museum of Zoology, University of Michigan 146: 1-43.
• Churchfield S. 1980. Subterranean foraging and burrowing activity of the common shrew, Sorex araneus L. Acta Theriologica 25: 451-459.
• Cockburn A. and Lidicker W. Z., Jr 1983. Microhabitat heterogeneity and population ecology of an herbivorous rodents, Microtus californicus. Oecologia 59: 167-177.
• Cole F. R. and Batzli G. O. 1979. Nutrition and population dynamics of the prairie vole, Microtus ochrogaster, in central Illinois. Journal of Animal Ecology 48: 455-470.
• Dalby P. L. 1975. Biology of Pampa rodents, Balcarce area, Argentina. Publications of the Museum of Michigan State University, Biological Series 5: 149-271.
• Gauch H. G., Jr 1982. Multivariate analysis in community ecology. Cambridge University Press, Cambridge: 1-298.
• Hansson L. 1977. Spatial dynamics of field voles Microtus agrestis in heterogeneous landscapes. Oikos 29: 539-544.
• Kravetz F. O. 1972. Estudio del régimen alimentario, períodos de actividad y otros rasgos ecológicos en una población de "ratón hocicudo" (Oxymycterus rufus platensis, Thomas) de Punta Lara. Acta Zoologica Lilloana 29: 201-212.
• Krebs C. J. 1966. Demographic changes in fluctuating populations of Microtus californicus. Ecological Monographs 36: 239-272.
• Lidicker W. Z., Jr 1985. Population structuring as a factor in understanding microtine cycles. Acta Zoologica Fennica 173: 23-27.
• Łomnicki A. 1980. Regulation of population density due to individual differences and patchy environ­ment. Oikos 35: 185-193.
• Massoia E. and Fornes A. 1964. Pequeos mamiferos (Marsupialia, Chiroptera y Rodentia) y aves obtenidos en regurgitados de lechuzas (Strigiformes) del Delta bonaerense. Investigaciones Agro- pecuarias Delta del Parana 6: 27-34.
• Morris R. F. 1960. Sampling insect populations. Annual Review of Entomology 5: 243-263.
• Ostfeld R. S. 1985. Limiting resources and territoriality in microtine rodents. American Naturalist 126: 1-15.
• Ostfeld R. S. and Klosterman L. L. 1986. Demographic substructure in a California vole population inhabiting a patchy environment. Journal of Mammalogy 67: 639-704.
• Ostfeld R. S., Lidicker W. Z., Jr and Heske E. J. 1985. The relationship between habitat hetero­geneity, space use, and demography in a population of California voles. Oikos 45: 433-442.
• Redford K. H. 1987. Ants and termites as food: patterns of mammalian myrmecophagy. Current Mammalogy 1: 349-399.
• Redford K. H. and Dorea J. G. 1984. The nutritional value of invertebrates with emphasis on ants and termites as food for mammals. Journal of Zoology, London 203: 385-395.
• Rosenzweig M. L. and Abramsky A. 1980. Microtine cycles: the role of habitat heterogeneity. Oikos 34: 141-146.
• Scheirer C. J., Ray W. S. and Hare N. 1976. The analysis of ranked data derived from completely randomized factorial designs. Biometrics 32: 429-434.
• Sokal R. R. and Rohlf F. J. 1981. Biometry. 2nd ed. W. H. Freeman, New York: 1-859.
• Stenseth N. C. 1980. Spatial heterogeneity and population stability: Some evolutionary consequences. Oikos 35: 165-184.
• Taitt M. J. and Krebs C. J. 1983. Predation, cover, and food manipulations during a spring decline of Microtus towsendii. Journal of Animal Ecology 52: 837-848.
• Westhoff V. and Maarel E., van der 1978. The Braun-Blanquet approach. [In: Classification of plants communities. R. H. Whittaker, ed]. Dr W. Junk, The Hague: 287-399.
• Young B. L. and Stout J. 1986. Effects of extra food on small rodents in a south temperate zone habitat: demographic responses. Canadian Journal of Zoology 64: 1211-1217.