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These animals have no obvious positive economic impact on humans, except for their roles as members of healthy, native ecosystems.
These animals have no obvious negative economic impact on humans.
Juveniles are particulary vulnerable to predation by birds of prey, especially owls (Strigiformes), when they leave their mother's burrows and must migrate to the edges of the population to construct their own burrow (Altuna et. al. 1999). Pearson's tuco-tucos are cryptically colored and otherwise remain in or near their burrows for fast escape from predators.
Known Predators:
Anti-predator Adaptations: cryptic
Pearson's tuco-tucos have an average length (body plus tail) of 19 cm and an average weight of 200 g. They have a reddish brown pelage with a white collar under the neck and white patches on the sides of the neck (Grizmek, 2003). They are similar to other species of Ctenomys in appearance, however C. pearsoni adult males possess a distinctive penis morphology that allows them to be distinguished from other members of the genus. Relative to other species of Ctenomys, C. pearsoni has the most distinctive bacular dimensions: wider, shorter and better defined than other species (Balbontin et. al. 1996). The baculum is paddle-shaped and single tipped (Altuna and Lessa 1985). The baculum also has a pair of spiny bulbs with varying numbers of spikes and the sperm are symmetrical, morphological traits also seen in C. dorbignyi, C. perrensi and C. roigi. Ctenomys pearsoni may have developed such a distinct baculum in response to selection pressure for reproductive isolation from other populations of spike bearing Ctenomys living close by (Balbontin et. al. 1996).
The incisors of C. pearsoni are more protodont than those of C. torquatus and C. talarum, but are not as protodont as the incisors of C. riongegrensis and C. minutus (Lessa and Langguth 1983).
A population of Ctenomys with a morphology similar to C. pearsoni has been found in Southern Uruguay east of the Santa Lucia river in the Departments of Carrasco, Salinas and Maldonado, but those animals do not have the same karyotype (Lessa and Langguth 1983).
Average mass: 200 g.
Average length: 19 cm.
Sexual Dimorphism: sexes alike
Other Physical Features: endothermic ; bilateral symmetry
The lifespan of C. pearsoni is unknown.
Presently, urbanization poses the greatest risk to Ctenomys pearsoni. Many small populations of C. pearsoni that were living in areas where roads, fences, or train tracks were installed, have gone extinct as a result of prolonged inbreeding due to being isolated from other populations by these man-made barriers (Altuna, et. al. 1999).
US Federal List: no special status
CITES: no special status
State of Michigan List: no special status
IUCN Red List of Threatened Species: near threatened
Tuco-tuco's are very vocal animals; they use many different types of vocalizations to communicate everything from aggression to sexual receptivity. At least 4 different types of vocalizations made by C. pearsoni have been classified. "S signals" play a very important role in the life of C. pearsoni. These signals are extremely structured, repeating, low-pitched calls that are often emitted so loudly that they can be heard outside the animal's burrow even if it is closed. They can also travel through the soil up to 6 meters away from the source. S signals are most likely used to defend territories, and prevent other individuals from building overlapping burrows. These vocalizations also can communicate sexual information among individuals in a population (Francescoli, 2005). There are also vocalizations known as "G signals", which are used during acts of aggression, such as occurs between two males who are both seeking access to the burrow of a receptive female (Altuna et. al. 1999). "C signals" are used by a female to indicate to an interested male that she is ready to mate. It has been hypothesized that because mounting attempts by the male are usually made after hearing a C signal (Francescoli, 2005), they may serve the same purpose as lordosis, which is a behavior not done by C. pearsoni females. Vocalizations are also important in the relationship between a mother and her pups. High frequency calls, known as RN signals, are made by pups who have wandered from the nest and result in the mother finding and retrieving them. (Francescoli, 2005).
To hear samples of C. pearsoni vocalizations please follow these links: "S signal": http://eto.fcien.edu.uy/sonidos/tuc.wav "C signal": http://eto.fcien.edu.uy/sonidos/c-all.wav "RN signal": http://eto.fcien.edu.uy/sonidos/crias3.wav
Communication Channels: tactile ; acoustic ; chemical
Perception Channels: visual ; tactile ; acoustic ; vibrations ; chemical
Pearson's tuco-tucos live in coastal sandy areas or dunes, although individuals have been found living as far as 500 meters from sandy soil (Altuna et. al. 1999). Typically, these animals prefer living along the edge of, or near the mouth of, rivers (Lessa and Langguth 1983).
Pearson's tuco-tucos live individually in subterranean burrows that are typically composed of a main gallery with other galleries and chambers that extend laterally from it (Altuna, 1983). Burrows usually have multiple mouths, which are kept closed most of the time; this keeps the humidity inside the burrow fairly constant, at around 92.65%. Pearson's tuco-tucos will only open burrowd for ventilation or when exiting to forage for food. The length, depth and layout of burrows varies and is determined, in part, by the hardness of the substrate and other topographic features of the location. Lengths of galleries have been recorded from 7.10 meters up to 24.40 meters (Altuna 1983). The diameter of a gallery is only slightly larger than the animal that lives there. The burrows of adult females were found to be larger than those of adult males and the burrows of juveniles were found to be shorter than those of adults (Altuna 1999).
Habitat Regions: tropical ; terrestrial
Terrestrial Biomes: desert or dune
Ctenomys pearsoni is found in the Southern Departments of Uruguay (Altuna et. al. 1998) as well as the Entre Rios Province. (Lessa and Langguth, 1983)
Biogeographic Regions: neotropical (Native )
Ctenomys pearsoni is an herbivorous generalist that bases its food selection more on the abundance and accessibility of a food than its nutritive value or water content. Laboratory studies showed that while C. pearsoni ate all species of plants provided, the two species of plants that make up almost 84% of its habitat's vegetal cover, Cynodon dactylon and Panicum racemosum, were the favorites. Also, field research has found chambers containing large amounts of these plants in the burrows of C. pearsoni (Altuna et. al. 1999).
Ctenomys pearsoni exhibits a number of behaviors related to obtaining and eating food. These animals do not eat their food above ground but instead emerge from the burrow briefly to cut and gather grasses and forbs. When returning to the burrow with food, C. pearsoni walks or runs backward using its tail to navigate. Once inside the burrow, grasses are held in one or both forepaws and shaken up and down in sequences of 4 to 18 movements at a high velocity (.16 shakes per second). This behavior is an effective method for removing dirt and soil from food and is used on wet, dry and dirty grasses alike (Altuna et. al., 1998). Similar food shaking behavior can be seen in other subterranean rodents such as Cryptomys damarensis (Bennet, 1990) and Geomys bursarius (Vaugn, 1966). Once the food is clean, large items are held with both forepaws and the incisors are used to twist and cut them into smaller pieces (Altuna et. al., 1998).
Ctenomys pearsoni practices autocoprophagy. This helps it obtain maximum nutritive value from its food and is especially important in the retention of water because C. pearsoni does not drink free water. Reingestion of feces most often takes place during resting periods or between feeding episodes. A special posture is adopted so that an animal is able to take fecal pellets with its lips and incisors instead of using its forepaws. The fecal pellets are chewed before they are swallowed (Altuna et. al., 1998). Chambers containing feces that are similar to those containing cut pieces of vegetation have been found in C. pearsoni burrows (Altuna et. al., 1999).
A unique feature of C. pearsoni is the size and mass of its caecum, where microbial fermentation of cellulose and pectin take place. The caecum in C. pearsoni weighs around 30% of the animal's total body weight and occupies the entire breadth of the abdomen, making it the most developed among hystricognath rodents (Altuna et. al., 1998).
Plant Foods: leaves; wood, bark, or stems
Other Foods: dung
Foraging Behavior: stores or caches food
Primary Diet: herbivore (Folivore )
The role played by Ctenomys pearsoni in its ecosystem has not been studied. They are likely to affect plant communities through their feeding habits and may help to aerate the soil and provide burrows to other animals.
Courtship and copulation occur in the burrow and during this brief period males and females live together (Altuna, 1991). The behavior of C. pearsoni during courtship involves males and females communicating through acoustic and tactile signals that tell males when females are ready to copulate and help to calm females, who are ordinarily very aggressive and territorial (Francescoli, 1998). While females are sexually mature and mate within their first year, males do not. This may be because females are exceptionally aggressive when they are in estrus and force juvenile males to take a submissive position when they are together (Tassino, 1992). Reproductive structures, such as the baculum, with its spiny bulbs and spikes, are not fully developed in males under a year old (Altuna and Lessa, 1985). This reduces a juvenile male's ability to court and copulate with females as these structures most likely play an important role in stimulating females and inducing ovulation. Mating in C. pearsoni involves a series of alternating copulation and intercopulation periods. A copulation period is initiated when the male mounts the female and ends when the male dismounts, starting a new intercopulation period during which the male will court the female again. During a copulation period, males alternate between rapid pelvic thrusting and deep intromission with multiple ejaculations (Altuna et. al. 1991).
Mating System: polygynous
Ctenomys pearsoni breeds once yearly. The breeding season occurs in the winter months of May, June, and July. Litter size ranges from 2 to 4, young are weaned in 32 to 40 days, and the young become independent at approximately 2 months of age.
Breeding interval: Pearson's tuco-tucos breed once yearly.
Breeding season: The breeding season for Pearson's tuco-tucos takes place during the winter months of May, June, and July.
Range number of offspring: 2 to 4.
Range weaning age: 32 to 40 days.
Average weaning age: 34.9 days.
Average time to independence: 2 months.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; viviparous
Ctenomys pearsoni exhibits highly motivated maternal behavior postpartum. Mothers build nests for their young and, following parturition, they spend more than 80% of their time in the nest with their pups. Mothers provide warmth for their babies by huddling in the nest with them. They also supply food, both milk and solid food they have collected and brought into the burrow. Mothers also groom the pups and will seek out and return to the nest any pups that may have wandered off. As pups become more mobile and start to wander more frequently, around the 2nd week of lactation, maternal behaviors begin to decline. By the 4th week the mother is still sleeping and huddling in the nest with her young and grooming them but now the pups help with the maintenance of the nest and food gathering. After the fifth week of lactation the mother leaves the pups alone more often, no longer restricts them from wandering and begins to reject their attempts to nurse (Pereira, 2006). However, even after the young are weaned they continue to remain with their mother for another 3 to 4 weeks. At that point they disperse, typically to the edges of the population, and dig their own burrow (Altuna et. al. 1999).
Behaviors exhibited by pups appear to play an important role in stimulating care-giving behaviors in their mother in that changes in pup development induce corresponding changes in maternal activities. Studies of C. pearsoni females in captivity reveal that mothers are willing to care for alien pups as well as their own pups. This is despite the fact that mothers were able to distinguish their pups from alien pups based on olfactory cues. Since this ability to identify pups is not used to determine which pups the mother is willing to care for, it most likely developed as a strategy to counter the extremely territorial and aggressive nature of C. pearsoni females. As pups get older and begin to wander in and out of burrows on their own, the ability to recognize their own pups' scent prevents females from attacking their young when they are returning to the nest (Pereira, 2006).
Parental Investment: altricial ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Provisioning: Female, Protecting: Female)
Ctenomys pearsoni és una espècie de rosegador de la família dels ctenòmids. Viu a l'Argentina i l'Uruguai. El seu hàbitat natural són les zones de sòl sorrenc amb una proporció variable d'argila i terra franca. Està amenaçat per la pèrdua d'hàbitat a causa del turisme, la construcció, la ramaderia i l'agricultura.[1]
Aquest tàxon fou anomenat en honor del zoòleg i ecologista estatunidenc Oliver Payne Pearson.[2]
Ctenomys pearsoni és una espècie de rosegador de la família dels ctenòmids. Viu a l'Argentina i l'Uruguai. El seu hàbitat natural són les zones de sòl sorrenc amb una proporció variable d'argila i terra franca. Està amenaçat per la pèrdua d'hàbitat a causa del turisme, la construcció, la ramaderia i l'agricultura.
Aquest tàxon fou anomenat en honor del zoòleg i ecologista estatunidenc Oliver Payne Pearson.
Die Pearson-Kammratte (Ctenomys pearsoni) ist eine Art der Kammratten. Die Art kommt endemisch im Süden von Uruguay vor. Sie ähnelt der nahe verwandten Halsband-Kammratte (Ctenomys torquatus) und besitzt wie diese einen auffälligen Kragen, unterscheidet sich von dieser jedoch vor allem in der Schädelmorphologie.
Die Pearson-Kammratte erreicht eine Gesamtlänge von 24,5 bis 27,7 Zentimetern mit einer Schwanzlänge von 7,2 bis 8,2 Zentimetern bei einem Gewicht von etwa 165 bis 300 Gramm. Es handelt sich damit um eine mittelgroße Art der Gattung. In ihrer Färbung entspricht die Art weitgehend der Halsband-Kammratte mit einer orange-braunen Rückenfärbung, helleren Körperseiten und einem blassbraunen Bauch. Wie bei dieser ist ein heller Kragen im unteren Halsbereich ausgebildet.[1]
Der Schädel ist vergleichsweise schmal, abgeflacht und verlängert. Die Oberseite der Stirn ist weitgehend flach vom Augenbereich bin zum Hirnschädel. Die Schnauze ist verlängert, und die oberen Schneidezähne sind leicht vorstehend (proodont). Die Paukenblasen sind verlängert und reichen bin hinter die Kondylen der Kopfgelenke.[1]
Der Karyotyp besteht aus einem doppelten Chromosomensatz von 2n = 56, 58, 64, 66 und 70 (FN=77 bis 80) Chromosomen; ein Zusammenhang zwischen den unterschiedlichen Haplotypen und der geographischen Verbreitung besteht wahrscheinlich nicht.[1] Allerdings ist unklar, ob alle Untersuchungen zum Karyotyp dieser Art sich wirklich auf diese beziehen.[2] Die Spermien sind symmetrisch.[1]
Das Verbreitungsgebiet der Pearson-Kammratte ist auf den Süden von Uruguay beschränkt, wo die Art endemisch nur im Bereich ihres Erstfundortes nahe der Stadt Rocha im Departamento Rocha bis Colonia del Sacramento im Departamento Colonia entlang des Río Uruguay vorkommt.[1]
Über die Lebensweise der Pearson-Kammratte liegen wie bei den meisten Arten der Kammratten nur wenige Informationen vor. Sie lebt wie alle Kammratten weitgehend unterirdisch in Gangsystemen. Als Lebensraum nutzt sie offene sandige Bereiche mit variablem Lehm-Anteil am Ufer oder in den umliegenden Bereichen des Río Uruguay.[3] Sie ernährt sich generalistisch vegetarisch von den verfügbaren Pflanzen, vor allem von Gräsern und Laub.[1] Die Art weist eine große Variationsbreite in der Konstruktion ihrer Gänge auf; in der Regel gibt es jedoch einen Hauptgang mit konstanter Tiefe, der die Hauptachse des Baus bildet. Die Tunnel haben 5 bis 24, im Durchschnitt dreizehn, Ausgänge und variieren in der Länge von 70 bis 130 Zentimetern. Es gibt ein oder zwei Nester aus getrocknetem Gras pro Tunnel.[1]
Die Tiere sind Einzelgänger (solitär) und territorial, sie verteidigen ihr Revier entsprechend gegen Artgenossen. Sie sind polygyn, ein Männchen verpaart sich also mit mehreren Weibchen. Die Reproduktionsphase findet vom Juli bis September statt, wobei sich die Weibchen um ihren Nachwuchs kümmern. Die Jungtiere werden über einen Zeitraum von etwa zwei Monaten gesäugt und verlassen danach den Bau der Mutter. Die jungen Weibchen sind bereits im Geburtsjahr geschlechtsreif.[1]
Die Pearson-Kammratte wird als eigenständige Art innerhalb der Gattung der Kammratten (Ctenomys) eingeordnet, die aus etwa 70 Arten besteht.[1][2] Die wissenschaftliche Erstbeschreibung der Art stammt von den uruguayischen Zoologen Enrique P. Lessa und Alfredo Langguth aus dem Jahr 1983, die sie anhand von Individuen aus Arroyo Limetas südöstlich von Carmelo im Departamento Colonia beschrieben.[1] Aufgrund von molekularbiologischen Daten wird sie der torquatus-Gruppe um die Halsband-Kammratte (Ctenomys torquatus) zugerechnet.[1]
Innerhalb der Art werden neben der Nominatform keine Unterarten unterschieden.[1][2]
Benannt wurde die Pearson-Kammratte nach dem amerikanischen Zoologen Oliver Payne Pearson (1915–2003).
Die Pearson-Kammratte wird von der International Union for Conservation of Nature and Natural Resources (IUCN) als Art der Vorwarnliste („near threatened“) gelistet.[3] Als Begründung wird das sehr kleine Verbreitungsgebiet mit einer verfügbaren Habitatfläche von weniger als 500 km2 angegeben, das sich zudem verkleinert. Die Hauptbedrohung für die Bestände der Art ist die Veränderung des Lebensraums; sie ist jedoch anpassungsfähig und überlebt auch in gestörten Lebensräumen, wobei sie die Landwirtschaft und auch Veränderungen am Flussufer toleriert.[3]
Die Pearson-Kammratte (Ctenomys pearsoni) ist eine Art der Kammratten. Die Art kommt endemisch im Süden von Uruguay vor. Sie ähnelt der nahe verwandten Halsband-Kammratte (Ctenomys torquatus) und besitzt wie diese einen auffälligen Kragen, unterscheidet sich von dieser jedoch vor allem in der Schädelmorphologie.
Pearson's tuco-tuco (Ctenomys pearsoni) is a species of rodent in the family Ctenomyidae.[2] It is endemic to Uruguay, where it is found at elevations below 200 m.[1] This tuco-tuco constructs burrows with multiple openings (an average of 13) containing one to two nests of dried grass; it prefers areas of sandy soil but is somewhat adaptable.[1] It is threatened by loss of habitat to development, agriculture and ranching.[1] Multiple karyotypes have been reported, including 2n = 68–70, FN = 80–88, as well as 2n = 56, FN = 77–79, suggesting the taxon may represent several species.[2] C. dorbignyi appears to be cytogenetically indistinguishable from the 2n = 70 form.[2] The species is named after American zoologist Oliver Payne Pearson.[3][4]
{{cite web}}: External link in |work=Pearson's tuco-tuco (Ctenomys pearsoni) is a species of rodent in the family Ctenomyidae. It is endemic to Uruguay, where it is found at elevations below 200 m. This tuco-tuco constructs burrows with multiple openings (an average of 13) containing one to two nests of dried grass; it prefers areas of sandy soil but is somewhat adaptable. It is threatened by loss of habitat to development, agriculture and ranching. Multiple karyotypes have been reported, including 2n = 68–70, FN = 80–88, as well as 2n = 56, FN = 77–79, suggesting the taxon may represent several species. C. dorbignyi appears to be cytogenetically indistinguishable from the 2n = 70 form. The species is named after American zoologist Oliver Payne Pearson.
El tucutucu de Pearson (Ctenomys pearsoni) es una especie de roedor del género Ctenomys de la familia Ctenomyidae. Habita en el centro-este del Cono Sur de Sudamérica.
Esta especie fue descrita originalmente en el año 1983 por los zoólogos Enrique P. Lessa y Alfredo Langguth.[2]
La localidad tipo referida es: “arroyo Limetas, 25 km al sudeste de Carmelo, departamento de Colonia, Uruguay”.[3]
El término específico es un epónimo que refiere al apellido de la persona a quien le fue dedicada la especie, el zoólogo y etólogo estadounidense (especializado en pequeños mamíferos) Oliver Paynie Pearson.
Esta especie de roedor es endémica del Uruguay. Se distribuye en la franja costera uruguaya, tanto del litoral marítimo como en la del Río de la Plata. Citado también en la Argentina.[1]
Según la organización internacional dedicada a la conservación de los recursos naturales Unión Internacional para la Conservación de la Naturaleza (IUCN), al sufrir varias amenazas (como la urbanización y utilización de su hábitat por el turismo o para ser dedicado a la agricultura) además de vivir en pocas áreas protegidas, la clasificó como una especie “casi amenazada” en su obra: Lista Roja de Especies Amenazadas.[1]
Datos: Q1770037
Especies: Ctenomys pearsoni
El tucutucu de Pearson (Ctenomys pearsoni) es una especie de roedor del género Ctenomys de la familia Ctenomyidae. Habita en el centro-este del Cono Sur de Sudamérica.
Ctenomys pearsoni Ctenomys generoko animalia da. Karraskarien barruko Ctenomyidae familian sailkatuta dago.
Ctenomys pearsoni Ctenomys generoko animalia da. Karraskarien barruko Ctenomyidae familian sailkatuta dago.
Ctenomys pearsoni est une espèce qui fait partie des rongeurs de la famille des Ctenomyidae. Comme les autres membres du genre Ctenomys, appelés localement des tuco-tucos, c'est un petit mammifère d'Amérique du Sud bâti pour creuser des terriers. Ce rongeur, que l'on rencontre en Argentine et en Uruguay, est considéré par l'UICN comme étant presque menacé[2].
L'espèce a été décrite pour la première fois en 1983 par le zoologiste et généticien uruguayen Enrique P. Lessa et le zoologiste brésilien Alfredo Langguth (né en 1941). Elle a été nommée ainsi en hommage au zoologiste américain Oliver Payne Pearson (1915-2003)[3].
Ctenomys pearsoni est une espèce qui fait partie des rongeurs de la famille des Ctenomyidae. Comme les autres membres du genre Ctenomys, appelés localement des tuco-tucos, c'est un petit mammifère d'Amérique du Sud bâti pour creuser des terriers. Ce rongeur, que l'on rencontre en Argentine et en Uruguay, est considéré par l'UICN comme étant presque menacé.
L'espèce a été décrite pour la première fois en 1983 par le zoologiste et généticien uruguayen Enrique P. Lessa et le zoologiste brésilien Alfredo Langguth (né en 1941). Elle a été nommée ainsi en hommage au zoologiste américain Oliver Payne Pearson (1915-2003).
Ctenomys pearsoni is een zoogdier uit de familie van de kamratten (Ctenomyidae). De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door Lessa & Langguth in 1983.
De soort komt voor in Argentinië en Uruguay.
Bronnen, noten en/of referentiesCtenomys pearsoni is een zoogdier uit de familie van de kamratten (Ctenomyidae). De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door Lessa & Langguth in 1983.
Tukotuko urugwajski[3] (Ctenomys pearsoni) – gatunek gryzonia z rodziny tukotukowatych (Ctenomyidae). Występuje w Urugwaju na terenie departamentów Soriano, San Jose i Colonia[4]. Występuje poniżej wysokości 200 m n.p.m.[2].
Tukotuko urugwajski podobnie jak pozostałe tukotuki są roślinożercami. Chętnie zamieszkują piaszczyste wydmy. Na zachodzie zamieszkują tylko twarde gleby, ale na wschodzie mieszkają również w miękkich glebach, w pobliżu jezior i lagun. Lubią nadbrzeżne zarośla i łąki.
Tukotuko urugwajski wykazują buduja nory o dużym zróżnicowaniu, ale najczęściej nie tworzą jednego głównego korytarza ze stałą głębokością. Tunele mają średnio około 13 otworów (w zakresie od 5 do 24) mają długość od 70 do 130 cm. W każdym tunelu jest tylko jedno lub dwa gniazda.
Kolonie gatunku są rozdrobnione i rozsiane. Zazwyczaj nie przekraczają liczby 15-20 osobników na hektar.
Nazwa gatunkowa odnosi się do nazwiska zoologa Olivera Pearsona.
Tukotuko urugwajski (Ctenomys pearsoni) – gatunek gryzonia z rodziny tukotukowatych (Ctenomyidae). Występuje w Urugwaju na terenie departamentów Soriano, San Jose i Colonia. Występuje poniżej wysokości 200 m n.p.m..
Tukotuko urugwajski podobnie jak pozostałe tukotuki są roślinożercami. Chętnie zamieszkują piaszczyste wydmy. Na zachodzie zamieszkują tylko twarde gleby, ale na wschodzie mieszkają również w miękkich glebach, w pobliżu jezior i lagun. Lubią nadbrzeżne zarośla i łąki.
Tukotuko urugwajski wykazują buduja nory o dużym zróżnicowaniu, ale najczęściej nie tworzą jednego głównego korytarza ze stałą głębokością. Tunele mają średnio około 13 otworów (w zakresie od 5 do 24) mają długość od 70 do 130 cm. W każdym tunelu jest tylko jedno lub dwa gniazda.
Kolonie gatunku są rozdrobnione i rozsiane. Zazwyczaj nie przekraczają liczby 15-20 osobników na hektar.
Nazwa gatunkowa odnosi się do nazwiska zoologa Olivera Pearsona.
Ctenomys pearsoni[2] är en däggdjursart som beskrevs av Lessa och Langguth 1983. Ctenomys pearsoni ingår i släktet kamråttor och familjen buskråttor.[3][4] IUCN kategoriserar arten globalt som nära hotad.[1] Inga underarter finns listade i Catalogue of Life.[3]
Denna gnagare förekommer i södra Uruguay vid havet och i angränsande områden av Argentina. Den når i kulliga regioner 200 meter över havet. Arten hittas främst i sanddyner men den lever även i andra områden med sandig mark eller med annan mjuk jord.[1]
Ctenomys pearsoni bygger underjordiska tunnelsystem med 5 till 24 sammanlänkade gångar samt med en eller två bon. Boet fodras med torr gräs.[1]
Wikispecies har information om Ctenomys pearsoni.
Ctenomys pearsoni är en däggdjursart som beskrevs av Lessa och Langguth 1983. Ctenomys pearsoni ingår i släktet kamråttor och familjen buskråttor. IUCN kategoriserar arten globalt som nära hotad. Inga underarter finns listade i Catalogue of Life.
Denna gnagare förekommer i södra Uruguay vid havet och i angränsande områden av Argentina. Den når i kulliga regioner 200 meter över havet. Arten hittas främst i sanddyner men den lever även i andra områden med sandig mark eller med annan mjuk jord.
Ctenomys pearsoni bygger underjordiska tunnelsystem med 5 till 24 sammanlänkade gångar samt med en eller två bon. Boet fodras med torr gräs.
Системи нір будує різноманітні, але найчастіше це один головний тунель на постійній глибині від якого відходять відгалуження довжиною 70-130 см. У системі нір є два-три кубла, вистелених сухою травою. Віддає перевагу проживанню серед дюн, але мешкає також і далі від них, углиб країни. Живе переважно на глинистих чи піщаних ґрунтах, але на заході ареалу живе на твердих ґрунтах, а на сході на м'яких ґрунтах поряд з озерами й лагунами.
Вид названий на честь професора, доктора Олівера Пейна Пірсона.
Основною загрозою є втрата місць проживання у прибережній зоні внаслідок розвитку туризму. У західній частині ареалу загрозою є втрата середовища проживання через розширення сільського господарства і тваринництва. Задля збереження виду заходів не вживається. Створено кілька природоохоронних районів для збереження лагун, що може становити деяку вигоду для даного виду.
Ctenomys pearsoni là một loài động vật có vú trong họ Ctenomyidae, bộ Gặm nhấm. Loài này được Lessa & Langguth mô tả năm 1983.[2]
Bài viết về một loài thuộc bộ Gặm nhấm này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Ctenomys pearsoni là một loài động vật có vú trong họ Ctenomyidae, bộ Gặm nhấm. Loài này được Lessa & Langguth mô tả năm 1983.
피어슨투코투코(Ctenomys pearsoni)는 투코투코과에 속하는 설치류의 일종이다.[2] 우루과이의 토착종이며, 해발 200m 이하에서 발견된다.[1] 피어슨투코투코는 여러 개의 구멍(평균 13개)을 가진 굴을 파며, 건조한 풀로 만든 한 두개의 둥지를 포함하고 있다. 모래로 된 흙 지역을 좋아하지만 어느 정도 융통성이 있다.[1] 개발과 농업 그리고 목장을 위한 서식지 감소 때문에 위협을 받고 있다.[1] 2n=68~70, FN=80~88과 2n=56, FN=77~79을 포함하여 다양한 핵형이 보고되고 있으며, 이 분류군이 여러 종을 대표되고 있음을 암시하고 있다.[2] 도르비니투코투코(C. dorbignyi)는 2n=70 형태에서 세포유전학적으로 구별할 수 없는 것으로 보인다.[2] 학명은 미국 동물학자 피어슨(Oliver Payne Pearson)의 이름에서 유래했다.[3][4]
피어슨투코투코(Ctenomys pearsoni)는 투코투코과에 속하는 설치류의 일종이다. 우루과이의 토착종이며, 해발 200m 이하에서 발견된다. 피어슨투코투코는 여러 개의 구멍(평균 13개)을 가진 굴을 파며, 건조한 풀로 만든 한 두개의 둥지를 포함하고 있다. 모래로 된 흙 지역을 좋아하지만 어느 정도 융통성이 있다. 개발과 농업 그리고 목장을 위한 서식지 감소 때문에 위협을 받고 있다. 2n=68~70, FN=80~88과 2n=56, FN=77~79을 포함하여 다양한 핵형이 보고되고 있으며, 이 분류군이 여러 종을 대표되고 있음을 암시하고 있다. 도르비니투코투코(C. dorbignyi)는 2n=70 형태에서 세포유전학적으로 구별할 수 없는 것으로 보인다. 학명은 미국 동물학자 피어슨(Oliver Payne Pearson)의 이름에서 유래했다.
