AnAge entry for Didelphis aurita. Classification (HAGRID: ). Taxonomy Genus: Didelphis; Species: Didelphis aurita; Common name: Big-eared opossum . Didelphis aurita was long considered a subspecies of Didelphis marsupialis, however recent DNA evidence places Didelphis aurita as its own species. Parasitol Res. Jan;(1) doi: /s Epub Dec 1. Identification of opossums Didelphis aurita (Wied-Neuweid, ).
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This article about a marsupial is a stub. Big-eared opossums closely resemble another Neotropical marsupial, common opossums Didelphis marsupialis. Didrlphis histories of mammals: Plant Ecology 1: In the case of big-eared opossums, the breeding season coincides with the wet season, when fruit is most abundant.
The underfur is described as a dirty yellow color with the overhairs being black or grey. A population of the black-eared opossum, Didelphis aurita Wied-Neuwiedwas studied during by capture-mark-recapture in the Atlantic Forest in the state of Rio de Janeiro.
Fifty six litters were marked and monitored during difelphis study.
Most fruit is consumed during the wet season when it is most abundant. Journal of Animal Ecology Big-eared opossums have prominent facial markings and a conspicuous black line down the center of their forehead. Age structure of two marsupial species in a Brazilian restinga. New York, Alfred A.
A strong correlation between leaf litter production and opossum population dynamics was found in a previous study in the same location as this study GENTILE et al.
Also, the net reproductive rate R 0 tended to values below 1.
The longest lived individual survived days 20 months. Studies on Neotropical Fauna and Environment Studies on Neotropical Fauna and Environment36 2: They also did not see males as being more nomadic than females, as Caveres and Monteiro-Filho observed in a study in Southern Brazil, however some females did have longer residence time than males Gentile and Cerqueira Breeding season begins in January after 4 months of anestrous and first litters are weaned in April and replaced by the second, which are weaned at the close of the reproductive season airita August.
Morphometrics of the genus Didelphis Didelphimorphia: DNA sequence data has shown a divergence of 2.
This page was last edited on 1 Mayat Caceres, ; Emmons, ; Hume, Male big-eared opossums tend to be larger than aurira. A Field Guide 2nd ed. Population dynamics and reproduction of marsupials and rodents in a Brazilian rural area: If a male is placed didelphid a female that is not in estrous, she becomes aggressive, but the male does not return her attacks Nowak Big-eared opossums are considered promiscuous.
Didelphidae using life tables. The ADW Team gratefully acknowledges their support.
The nematodes in the subfamily Aspidoderinae, which includes the genus AspidoderaRailliet and Henry,are represented by nematodes ahrita anterior cephalic cordons at the anterior end. This scansorial behavior djdelphis allow for some resource partitioning and alleviate some competition between big-eared opossums and other opossums in the area, like the terrestrial brown four-eyed opossums and the arboreal bare-tailed woolly opossums. Their ears are naked and black. The decline in reproductive value at the senescent age class is due to the increased mortality at that time.
Age structure of two marsupial species in a Brazilian restinga. Reproductive value increased to the third or fourth age classes, after which it declined Fig. Ecotourism implies that there are existing programs that profit from the appreciation of natural areas or animals. The first females with young in the pouch were captured in August and by February end of reproductive periodmost females were still lactating, but without young in the auriga.
The tail length typically is around Support diameter, incline, arita vertical movements of four didelphid marsupials in the Atlantic forest of Brazil. John Hopkins University Press. Life table use permits the estimation of age-specific parameters of the population of interest, such as mortality, fecundity and reproductive value.
Age specificity and ecological theory. Iteroparous animals must, by definition, survive over multiple seasons or periodic condition changes.