Abstract. We studied the population structure, spatial patterns, and activity patterns of the water opossum (Chironectes minimus) via. Abstract. The male genital system was examined in 9 male specimens of Chironectes minimus (2 adult and 7 young) from Brazil. Unlike other. AnAge entry for Chironectes minimus. Classification (HAGRID: Genus: Chironectes; Species: Chironectes minimus; Common name: Water opossum ( yapok).

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The muscles that surround the anal and urogenital openings are probably sphincters.

Our finding that individual males were located near or using the same den as females bearing offspring is contradictory with the promiscuous mating system, and it may indicate either parental care or mate guarding by males.

For each individual captured, we recorded trap station, sex, reproductive condition pouch young and swollen mammae for females, and testes position for malesbody measurements weight and tail lengthand age by tooth-eruption sequence. At 48 days of age, the young opossums detach from the nipples but still nurse and sleep with the mother.

Chironectes minimus – #2352

Nothing is known, among other subjects, about population structure, reproduction in the wild, spatial patterns home lengths and overlaps and habitat selectionand activity patterns of water opossums. Marshall, ; Marshall, ; Nowak and Wilson, In periods of high rainfall, when the river levels are high, water opossums are seldom captured and therefore population levels are underestimated.

This tributary was narrow, with a sandy substrate, and it dried during the dry season. Water opossums also have broad, webbed hindfeet, which they use to move through the water.

From Wikipedia, the free encyclopedia. The penis of C. In most chironecges vertebrates, the urogenital and alimentary tracts open jointly into the cloaca, whereas in most marsupials, they open separately into the cloaca.


The thylacinecommonly referred to as the Tasmanian tiger, also exhibited this trait, but is now believed to be extinct. There are 4 recognized subspecies of Chironectes minimuseach with a relatively distinct geographic range.

Water opossum – Wikipedia

Being a marsupial and at minimuus same time an aquatic animal, the water opossum has evolved a way to protect its young while swimming. The sex glands are illustrated in Fig. Fleck, ; Marshall, ; Marshall, ; Smith, ; Tortato, Known Predators roadside hawks Rupornis magnirostris hawk-eagles Spizaetus spp. Morphological description of jinimus male genital system of the bushy-tailed opossum Glironia venusta Thomas, Didelphimorphia, Didelphidae. We placed trap stations in favorable river sites, in order to maximize capture success see below.

HandleyMondolfi and Padillaand Zetek captured water opossums in streams similar to the ones we studied, and Voss et al.

It has well-preserved habitats along its entire course, with few areas without riparian forest, and consists of runs and riffles with stony substrate. To our knowledge, there is no detailed description of the male genital system of C. Reproduction in Didelphis marsupialis and D.

Water opossum Chironectes minimus. The attachment of the cremaster at minkmus tunica vaginalis of C. We detected activity as fluctuations in the transmitter’s signal strength.


This stretch represented The activity period of water opossums was strictly nocturnal, beginning after sunset and ending before sunrise. Their streamline body is covered with a water-repellent coat that enhances buoyancy. International Union for Conservation of Nature. The cremaster muscle strongly attaches in a laminar fashion to chironctes dorsolateral portions of the parietal layer of the tunica vaginalis, which encloses the testes and the epididymides.

These animals weigh between to g and average g. In Peru Terborgh et al.

They also create dens and nests that are used by other water opossums once they are abandoned. This last feature allows a female to swim with young in her pouch and protects a male’s scrotum from low water temperatures Marshall minimsu Nowak In this species, these structures form 2 functional channels. The Dona Rosa River is 2. The tip of each hemi-glans is rounded and bulbous chiroectes, whereas the urethral grooves end at the ventral aspect of the tip of each half glans.


Home lengths of males were 4 times longer than those of females and overlapped extensively with each other. Retrieved from ” https: Because the tooth-eruption pattern for C.

Captures were concentrated in 3 streams: In terrestrial habitats, it minimmus on its hind legs, rapidly and aggressive tearing food with its sharp teeth.

Water opossum

Padding on the soles and palms of both hind- and forefeet are minimal; this has been attributed to their aquatic or soft-substrate habitats, particularly muddy banks of river and streams.

Journal of Mammalogy We captured juvenile individuals in both dry and wet seasons Fig. Lindsey Paretti – Blood Island Africachimpanzeeconservationfilm chironextes, In the Fieldlab chimpsLiberiaPrimatesprimatologyrehabilitationtrue storywildlifewildlife filmWildscreen Festival. Lacking the water-repellent coat of water opossums, Virginia opossums must expend greater amounts of energy to keep their body afloat. Regarding spatial patterns, we estimated the home lengths—the distance along the river course between the most widely separated locations of each individual—and analyzed home-length overlaps.

As in other species Caluromys lanatus, Caluromys philander, Gracilinanus agilis, Gracilinanus microtarsusand Glironia venustaC. The Animal Diversity Web is an educational resource written largely by and for college students. Assessing chirlnectes use in meadow voles: X Close Link to this photo Embed this Arkive thumbnail link “portlet” by copying and pasting the code below.