Chaetodipus pernix és una espècie de rosegador de la família dels heteròmids. És endèmica de Mèxic (Nayarit, Sinaloa i Sonora). S'alimenta de llavors. El seu hàbitat natural és una plana amb llim al·luvial fi gairebé sense roques petites, amb una vegetació composta d'arbres lleguminosos espinosos, cactus arborescents i un sotabosc d'Opuntia, Stenocereus i petits matollars llenyosos. Està amenaçada per l'ús de rodenticides i la transformació del seu entorn per a usos agrícoles.[1]
Chaetodipus pernix és una espècie de rosegador de la família dels heteròmids. És endèmica de Mèxic (Nayarit, Sinaloa i Sonora). S'alimenta de llavors. El seu hàbitat natural és una plana amb llim al·luvial fi gairebé sense roques petites, amb una vegetació composta d'arbres lleguminosos espinosos, cactus arborescents i un sotabosc d'Opuntia, Stenocereus i petits matollars llenyosos. Està amenaçada per l'ús de rodenticides i la transformació del seu entorn per a usos agrícoles.
The Sinaloan pocket mouse (Chaetodipus pernix) is one of 17 species of pocket mice in the genus Chaetodipus.[2] Two subspecies of C. pernix are recognized, C. p. pernix and C. p. rostratus, all are endemic to Mexico.[3]
This small mouse lives among shrubs and has a wide range of coat colors.
C. pernix mostly lives in the coastal plain of Sinaloa state within Mexico, which extends from southern Sonora to northern Nayarit. Their habitat consists mostly of small trees, shrubs, and cacti. Sinaloan pocket mice are found on sandy soil, living under low bushes or dense networks of vines and grasses.[3] Their habitat does not contain any rock material, unlike in its sister species, the rock pocket mouse.[4]
The Sinaloan pocket mouse is one of the smallest in the genus Chaetodipus with a total length of less than 200mm. Their skull is narrow with an elongated nose and medium-sized ears. C. pernix has a thinly haired tail that is longer than the body length. Their coat color is variable (usually yellowish-brown), but always darker on the back and lighter on the sides and belly. Their diet consists of grains and seeds. The average litter size is seven.[3]
Color polymorphism
Coat color is a genetic polymorphism. Many different coat colors are seen between species of pocket mice and even within the same population because of differences in their genotype.[5] Multiple aspects of the environment put selective pressures on pocket mice to adapt their coat colors.[5] Variation in coat color between pocket mice can be a selective advantage for two main reasons: concealment and regulation of physiological processes.[5]
Concealment offers a large selective advantage for pocket mice that are able to successfully hide from potential predators, also known as Crypsis. Pocket mice generally show two forms of crypsis: camouflage and countershading. Camouflage is seen when an organism's coloring helps it blend into its background or environment. Evidence of camouflage is seen between different populations of pocket mice that live in two different environments. The Sinaloan pocket mouse usually has a yellow-brown coat with black hairs because they live in a sandy environment under shrubs, while the Rock pocket mouse usually has a grey or black coat color and lives among rocks.[6] Mice who show a very different coat color than their environment are more susceptible to predation because they can be seen easier than mice that blend in with their environment.[5] Countershading is another type of camouflage and is seen when an organism's pigmentation is darker on the upper side of the body and lighter on the underside of the body. Sinaloan pocket mice almost always have a lighter belly and sides compared to the darker color of their back. The selective advantage of this color patterning is again, concealment from predators, mostly owls in this case. Countershading helps the pocket mouse to reduce the appearance of their shadow in sunny environments.[5] Living in the sunny desert, this color pattern has a large selective advantage. Mice whose shadows were easily seen by owls flying overhead would more likely become prey, than mice whose shadows weren't as obvious.
Coat color in pocket mice can also be a selective advantage because it can help regulate physiological processes of the body. Light coat colors have a selective advantage in hot, sunny environments because they can help regulate body temperature. A dark coat in a sunny environment would attract sunlight and cause the mouse to overheat more easily, requiring more energy from the mouse to try and lower their body temperature. A light coat color requires less energy input to regulate body temperature and therefore has a selective advantage over dark coat color which requires more energy.[5]
The selective advantage of coat color for concealment and regulation of body temperature likely caused geographic variation of coat color as well. For both concealment and body temperature regulation, the mice better adapted to their environment will likely survive better and produce more offspring. This means that the mouse that blends in with its environment the best, in a way that uses the least amount of energy will have a selective advantage. Going along with this, mice in different environments require different coat colors to blend in most effectively. Geographic variation between environments is another selective pressure that helped color polymorphism evolve between pocket mice. Pocket mice that live in sunny environments with an abundance of sand will have a selective advantage with light colored yellow or brown coats. In contrast, pocket mice that live on rocks in environments with less sun are more likely to have a selective advantage with darker colored grey or black coats.[5]
Genetic basis
The genetic difference for varying coat colors is controlled largely by two proteins in pocket mice: eumelanin and pheomelanin. Production of eumelanin gives hair a black or brown color, while pheomelanin gives hair a red color. Melanocytes are pigment producing cells, which are controlled by genes. Differences in gene expression cause melanocytes to produce varying levels and types of pigment.[6]
Eumelanin is produced when the G protein-coupled receptor called melanocortin-1-receptor (MC1R) is activated. Pheomelanin production is controlled by the agouti-signaling protein, which is an inverse agonist of MC1R. Therefore, Agouti expression causes decreased levels of eumelanin production, which allows increased levels of pheomelanin expression.[6] Variation in the environment can cause proteins to be expressed differently in the genome, producing variation in coat color between two different environments.
The Sinaloan pocket mouse (Chaetodipus pernix) is one of 17 species of pocket mice in the genus Chaetodipus. Two subspecies of C. pernix are recognized, C. p. pernix and C. p. rostratus, all are endemic to Mexico.
This small mouse lives among shrubs and has a wide range of coat colors.
Chaetodipus pernix o ratón de bolsillo sinaloense, es una de las 17 especies de ratón de bolsillo del género Chaetodipus.[1] Dos subespecies de C. pernix son reconocidas, C. p. pernix y C. p. rostratus, endémicas de México.[2]
Este ratón pequeño vive entre arbustos y tiene una amplia gama de colores de capa.
Datos: Q172553
Especies: Chaetodipus pernix
Chaetodipus pernix o ratón de bolsillo sinaloense, es una de las 17 especies de ratón de bolsillo del género Chaetodipus. Dos subespecies de C. pernix son reconocidas, C. p. pernix y C. p. rostratus, endémicas de México.
Este ratón pequeño vive entre arbustos y tiene una amplia gama de colores de capa.
Chaetodipus pernix Chaetodipus generoko animalia da. Karraskarien barruko Perognathinae azpifamilia eta Heteromyidae familian sailkatuta dago.
Chaetodipus pernix Chaetodipus generoko animalia da. Karraskarien barruko Perognathinae azpifamilia eta Heteromyidae familian sailkatuta dago.
Chaetodipus pernix est une espèce qui fait partie des mammifères Rongeurs de la famille des Heteromyidae. Ce sont des souris à poches[1], c'est-à-dire à larges abajoues, et à poil dur. Cet animal est endémique du Mexique.
L'espèce a été décrite pour la première fois en 1893 par le zoologiste américain Joel Asaph Allen (1838-1921).
Selon Mammal Species of the World (version 3, 2005) (27 nov. 2012)[2] :
Chaetodipus pernix est une espèce qui fait partie des mammifères Rongeurs de la famille des Heteromyidae. Ce sont des souris à poches, c'est-à-dire à larges abajoues, et à poil dur. Cet animal est endémique du Mexique.
L'espèce a été décrite pour la première fois en 1893 par le zoologiste américain Joel Asaph Allen (1838-1921).
Chaetodipus pernix is een zoogdier uit de familie van de wangzakmuizen (Heteromyidae). De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door J.A. Allen in 1898.
De soort komt voor in Mexico.
Bronnen, noten en/of referentiesChaetodipus pernix is een zoogdier uit de familie van de wangzakmuizen (Heteromyidae). De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door J.A. Allen in 1898.
Chaetodipus pernix[2][3] är en däggdjursart som beskrevs av J. A. Allen 1898. Chaetodipus pernix ingår i släktet Chaetodipus och familjen påsmöss.[4][5] IUCN kategoriserar arten globalt som livskraftig.[1] Inga underarter finns listade i Catalogue of Life.[4]
Denna gnagare förekommer i västra Mexiko vid Stilla havet, delstaterna Nayarit, Sinaloa och Sonora. Habitatet utgörs av det kustnära låglandet med några större växter som träd eller kaktusar. Dessutom finns en tätare undervegetation av taggiga buskar och mindre kaktusar. En dräktig hona observerades i april och nyfödda ungar hittades i oktober och november.[1]
Wikispecies har information om Chaetodipus pernix.
Chaetodipus pernix är en däggdjursart som beskrevs av J. A. Allen 1898. Chaetodipus pernix ingår i släktet Chaetodipus och familjen påsmöss. IUCN kategoriserar arten globalt som livskraftig. Inga underarter finns listade i Catalogue of Life.
Denna gnagare förekommer i västra Mexiko vid Stilla havet, delstaterna Nayarit, Sinaloa och Sonora. Habitatet utgörs av det kustnära låglandet med några större växter som träd eller kaktusar. Dessutom finns en tätare undervegetation av taggiga buskar och mindre kaktusar. En dräktig hona observerades i april och nyfödda ungar hittades i oktober och november.
Chaetodipus pernix là một loài động vật có vú trong họ Chuột kangaroo, bộ Gặm nhấm. Loài này được J. A. Allen mô tả năm 1898.[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. Chaetodipus pernix là một loài động vật có vú trong họ Chuột kangaroo, bộ Gặm nhấm. Loài này được J. A. Allen mô tả năm 1898.
시날로아주머니생쥐(Chaetodipus pernix)는 주머니생쥐과에 속하는 설치류의 일종이다.[2] 거친털주머니생쥐속에 속하는 17종의 주머니생쥐의 하나이다. 멕시코의 토착종이다.[3] 관목 속에서 서식하며, 다양한 색을 띤다.
시날로아주머니생쥐는 거친털주머니생쥐속 중에서 가장 작은 종으로 전체 몸길이는 200mm이하이다. 두개골은 좁고, 가늘고 긴 코와 중간 크기의 귀를 갖고 있다. 몸길이보다 길고 가는 털을 가진 꼬리를 갖고 있다. 털 색은 다양하며 보통 누르스름한 갈색을 띠지만 등 쪽은 항상 진하고 옆구리와 배 쪽은 연한 색을 띤다. 먹이는 곡식과 씨앗으로 구성되어 있다. 보통 7마리의 새끼를 낳는다.[3]
2종의 아종이 알려져 있다.[3]
