There is no information available on the general reproductive behavior of (Voss, 1988). Data on reproduction for its ichthyomyine relatives is sporatic and does not identify seasonal trends. However, these relatives have been recorded to have litter sizes of one to two offspring.
There is no information available on the parental care of Sigmodontinae, generally care for their young alone. They are viviparous, birthing altricial offspring in nests built out of plant material. The young then stay with their mother until weaned, which can take 5 to 30 days. (Poor, 2005)or its ichthyomyine relatives. However, females in this species subfamily,
It can be tentatively assumed thatmay birth and raise their young in tunnel systems instead of nests, as mentioned in the Behavior section.
There is no information available on the lifespan/longevity of Sigmodontinae do not live very long. The majority of Sigmodontines do not live past one year in the wild but some species have survived to five years in captivity. (Poor, 2005). However, members in its subfamily
In the wild, (Barnett, 1997)is a solitary, semi-aquatic species, and little is known about its behavior. However, one individual was held captive for four months before release, providing time for observation. Through this, it was determined that is nocturnal but was sometimes seen emerging for short periods in the daytime. It also created tunnels in addition to the artificial burrow provided, shedding light that this species may be semi-fossorial.
There is no information available on how this species communicates with others. However, members in its subfamily Sigmodontinae communicate through a variety of squeaking noises in addition to being able to detect and produce ultrasounds. Males also scent-mark their territories with urine and feces. (Poor, 2005)
They use their highly developed vibrissae and forepaws to locate and capture their food, eating and manipulating it with their forepaws. The food handling behavior of Ichthyomys pittieri described by Voss et al. (1982). Observations of individuals has revealed they hunt for fish underwater and then take them to a separate location, like the tunnels mentioned above, to consume the fish. (Barnett, 1997; Barnett, 1999)is similar to that of its relative
There is no information available on the predation of Sigmodontinae include hawks, owls, snakes and carnivorous mammals. It should be noted that semiaquatic species of Sigmodontinae, like , may avoid predation by diving into water. They may also avoid predation through use of their burrows and tunnels. (Poor, 2005). However, general predators of its subfamily
There is little information on the ecosystem roles of. However, they likely provide food for other animals mentioned in the Predation section. In addition, as an insectivore, may control insect and aquatic invertebrate populations within their range. Through their tunnel digging, this species could also function as an ecosystem engineer.
There are no known positive effects ofon humans.
There are no known adverse effects ofon humans.
According to the IUCN database, the conservation status of (Anderson, et al., 2019)is data deficient.
Gabrielle Krohn (author), University of Washington, Laura Prugh (editor), University of Washington, Tanya Dewey (editor), University of Michigan-Ann Arbor.
living in the southern part of the New World. In other words, Central and South America.
uses sound to communicate
young are born in a relatively underdeveloped state; they are unable to feed or care for themselves or locomote independently for a period of time after birth/hatching. In birds, naked and helpless after hatching.
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
an animal that mainly eats meat
uses smells or other chemicals to communicate
animals that use metabolically generated heat to regulate body temperature independently of ambient temperature. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a (now extinct) synapsid ancestor; the fossil record does not distinguish these possibilities. Convergent in birds.
parental care is carried out by females
Referring to a burrowing life-style or behavior, specialized for digging or burrowing.
mainly lives in water that is not salty.
An animal that eats mainly insects or spiders.
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
having the capacity to move from one place to another.
This terrestrial biome includes summits of high mountains, either without vegetation or covered by low, tundra-like vegetation.
the area in which the animal is naturally found, the region in which it is endemic.
active during the night
an animal that mainly eats fish
the kind of polygamy in which a female pairs with several males, each of which also pairs with several different females.
Referring to something living or located adjacent to a waterbody (usually, but not always, a river or stream).
communicates by producing scents from special gland(s) and placing them on a surface whether others can smell or taste them
remains in the same area
reproduction that includes combining the genetic contribution of two individuals, a male and a female
digs and breaks up soil so air and water can get in
uses touch to communicate
Living on the ground.
the region of the earth that surrounds the equator, from 23.5 degrees north to 23.5 degrees south.
A terrestrial biome. Savannas are grasslands with scattered individual trees that do not form a closed canopy. Extensive savannas are found in parts of subtropical and tropical Africa and South America, and in Australia.
A grassland with scattered trees or scattered clumps of trees, a type of community intermediate between grassland and forest. See also Tropical savanna and grassland biome.
A terrestrial biome found in temperate latitudes (>23.5° N or S latitude). Vegetation is made up mostly of grasses, the height and species diversity of which depend largely on the amount of moisture available. Fire and grazing are important in the long-term maintenance of grasslands.
uses sound above the range of human hearing for either navigation or communication or both
uses sight to communicate
reproduction in which fertilization and development take place within the female body and the developing embryo derives nourishment from the female.
Ministerio del Ambiente. 2015. "Parque Nacional Cajas" (On-line). Accessed June 26, 2021 at http://areasprotegidas.ambiente.gob.ec/en/areas-protegidas/cajas-national-park.
Anderson, R., M. Gómez-Laverde, M. Weksler. 2019. "Las Cajas Ichthyomine" (On-line). The IUCN Red List of Threatened Species. Accessed April 13, 2021 at https://www.iucnredlist.org/species/136775/22387119#bibliography.
Barnett, A. 1999. Small mammals of the Cajas Plateau, southern Ecuador: Ecology and natural history. Bulletin of the Florida Museum of Natural History, 42(4): 161-217. Accessed April 13, 2021 at https://www.floridamuseum.ufl.edu/wp-content/uploads/sites/35/2017/03/Vol-42-No-4.pdf.
Barnett, A. 1997. The ecology and natural history of a fishing mouse Chichanomys spec. nov. (Ichthyomyini: Muridae) from the Andes of southern Ecuador. International Journal of Mammalian Biology, 62: 43-52. Accessed April 13, 2021 at https://www.semanticscholar.org/paper/The-ecology-and-natural-history-of-a-fishing-mouse-Barnett/208fdb6ddd1e8c93c1f885efb53ba180d0e65ceb.
Doskocil, L. 2020. ""If Watersheds Spoke: A condition analysis of the Rio Tomebamba watershed in southern Ecuador using GIS analysis"" (On-line). Independent Study Project (ISP) Collection. Accessed April 13, 2021 at https://digitalcollections.sit.edu/isp_collection/3323/.
Jenkins, P., A. Barnett. 1997. A new species of water mouse, of the genus Chibchanomys (Rodentia, Muridae, Sigmodontinae) from Ecuador. Bulletin of The Natural History Museum, 63: 123-128. Accessed April 13, 2021 at http://www.rebeccashapley.com/akodon/reprint_pdfs/97Chibchanomys_orcesiNewSpeciesDescription.pdf.
Poor, A. 2005. "Sigmodontinae" (On-line). Animal Diversity Web. Accessed May 08, 2021 at https://animaldiversity.org/accounts/Sigmodontinae/.
Voss, R. 1988. Systematics and Ecology of Ichtyomyine rodents (Muroidea): Patterns of Morphological Evolution in a small Adaptive Radiation. Bulletin of The American Museum of Natural History, 188(2): 262-482. Accessed May 08, 2021 at https://digitallibrary.amnh.org/handle/2246/927.