scholarly journals The genetics of tiger pelage color variations

Cell Research ◽  
2017 ◽  
Vol 27 (7) ◽  
pp. 954-957 ◽  
Author(s):  
Xiao Xu ◽  
Gui-Xin Dong ◽  
Anne Schmidt-Küntzel ◽  
Xue-Li Zhang ◽  
Yan Zhuang ◽  
...  
Keyword(s):  
Pelage Color

Control of torpor and body weight patterns by a seasonal timer in Siberian hamsters

1989 ◽  
Vol 257 (1) ◽  
pp. R142-R149 ◽  
Author(s):  
T. J. Bartness ◽  
J. A. Elliott ◽  
B. D. Goldman
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Implant Removal ◽  
Daily Torpor ◽  
Short Day ◽  
Siberian Hamsters ◽  
Long Day ◽  
Preparatory Phase ◽  
Pelage Color ◽  
Seasonal Responses

Two experiments were designed to assess whether the short-day-induced patterns of shallow daily torpor, body weight, and other seasonal responses (food intake and pelage pigmentation) exhibited by Siberian hamsters (Phodopus sungorus sungorus) are under the control of a "seasonal timekeeping mechanism" that is independent of reproductive status [testosterone, (T)]. We examined whether the patterning and expression of these seasonal responses were altered by decreases in serum T that accompany gonadal regression during the first 8 wk of short-day exposure (i.e., the "preparatory phase" of the torpor season) or by experimental increases in serum T after this phase. Short-day-housed, castrated hamsters bearing T implants had long-day levels of the hormone and did not exhibit torpor. Appropriate seasonal patterns and levels of torpor, body weight, pelage color stage, and food intake were exhibited after T implant removal although serum T was clamped to long-day levels during the preparatory phase. In animals that were gonad intact during the preparatory phase and were subsequently castrated and given T implants, torpor did not occur as long as the implants were in place. However, the patterns and levels of daily torpor, food intake, and body weight rapidly returned to appropriate seasonal values compared with the castrated, blank-implanted controls on T implant removal; these effects occurred whether the T implants were removed when torpor frequency was increasing, at its peak, or decreasing across the torpor season. T did not affect pelage color stage under any condition.(ABSTRACT TRUNCATED AT 250 WORDS)

Pre- and postnatal effects of photoperiod on collared lemmings (Dicrostonyx groenlandicus)

1994 ◽  
Vol 267 (4) ◽  
pp. R879-R887 ◽  
Author(s):  
B. A. Gower ◽  
T. R. Nagy ◽  
M. H. Stetson
Keyword(s):  
Subsequent Development ◽  
Serum Prolactin ◽  
Hair Length ◽  
Dark Cycle ◽  
Guard Hair ◽  
Short Day ◽  
Dicrostonyx Groenlandicus ◽  
Offspring Growth ◽  
Pelage Color ◽  
Long Photoperiod

We investigated the hypothesis that photoperiod information received during the prenatal and/or early postnatal periods influences subsequent development in collared lemmings. Pregnant lemmings were exposed to either a short [8:16-h light-dark cycle (8:16)] or long (22:2) photoperiod throughout gestation. On the day of birth, pups were cross-fostered to dams housed in either short or long photoperiod. After an 11-day experimental lactational period (LACT), all animals were transferred to an intermediate photoperiod (16:8), the response to which depends on prior photoperiod exposure. Pups remained on this photoperiod until death at postnatal day 90. Information received during gestation (GEST) influenced offspring growth, pelage color, guard hair length, presence of the bifid claw at weaning, testes mass at 10 wk postweaning, and serum prolactin (PRL). Parameters measured at weaning reflected directly the photoperiod experienced during GEST (e.g., short-day GEST pups had white pelage). Conversely, parameters measured at 10 wk postweaning reflected the change in photoperiod experienced between GEST and 16:8 (e.g., short-day GEST young had gray pelage, indicative of an increase in photoperiod). Information received during LACT influenced growth and the presence of the bifid claw at weaning.

Pelage Color Variation of Macaca arctoides and Its Evolutionary Implications

2008 ◽  
Vol 29 (2) ◽  
pp. 531-541 ◽  
Author(s):  
Daisuke B. Koyabu ◽  
Suchinda Malaivijitnond ◽  
Yuzuru Hamada
Keyword(s):  
Color Variation ◽  
Macaca Arctoides ◽  
Pelage Color

Genetically-Determined Variation of Pelage Color and Reflectance in Natural and Laboratory Populations of the Marsupial Sminthopsis-Crassicaudata (Gould)

1988 ◽  
Vol 36 (4) ◽  
pp. 441 ◽  
Author(s):  
RM Hope ◽  
GK Godfrey
Keyword(s):  
Selective Advantage ◽  
South Central ◽  
Upper Limit ◽  
Sminthopsis Crassicaudata ◽  
Laboratory Colony ◽  
Laboratory Populations ◽  
Pelage Color ◽  
Desert Areas ◽  
Central Australia ◽  
Genetically Determined

A study of variation in dorsal pelage colour and reflectance of the dasyurid marsupial, Sminthopsis crassicaudata, has been based on animals captured from widely scattered areas in south-central Australia, and on a laboratory colony of this species. Measurements on the degree of resemblance between relatives gave heritability estimates of pelage reflectance close to the theoretical upper limit of unity. Measurements on the reflectance of animals captured from the wild revealed a geographical cline, with reflectance decreasing (animals becoming darker) with increasing southerly latitude. The higher reflectance (paler coloured) animals were found to inhabit the northern desert areas. We suggest that this cline results from a selective advantage enjoyed by animals whose dorsal pelage colour makes them relatively inconspicuous in their habitat to nocturnal preditors.

Morphometric and pelage color variation of two sibling species of shrew (Mammalia: Soricomorpha)

2014 ◽  
Vol 59 (3) ◽  
pp. 407-413 ◽  
Author(s):  
Shunde Chen ◽  
Yang Liu ◽  
Zhiyu Sun ◽  
Feiyun Tu ◽  
Changkun Fu ◽  
...  
Keyword(s):  
Sibling Species ◽  
Color Variation ◽  
Pelage Color

scholarly journals Abnormal pelage color in mantled howler monkey (Alouatta palliata mexicana) in Veracruz, México

2021 ◽  
Vol 2 (1) ◽  
pp. 26-28
Keyword(s):  
Alouatta Palliata ◽  
Howler Monkey ◽  
Mantled Howler ◽  
Pelage Color ◽  
Ad Libitum ◽  
Mantled Howler Monkey ◽  
Alouatta Palliata Mexicana

El leucismo es una despigmentación total o parcial del pelaje, mientras que el albinismo es la pérdida total de pigmentos en el cuerpo entero; las condiciones anormales de la carencia del pigmento se deben a la expresión de genes recesivos.  Se realizó una expedición ad libitum en el Ejido Álvaro Obregón, al suroeste de Nuevo Cantón, municipio de Uxpanapa, Veracruz en diciembre de 2019.  Presentamos el primer registro de un individuo de mono aullador de manto (Alouatta palliata mexicana) con coloración no convencional (probablemente leucismo o albinismo), observado en una tropa silvestre en la región del Valle de Uxpanapa, Veracruz, México.  La coloración de la mucosa oral y palpebral no muestran pigmentación y pueden ser resultado de la expresión de genes recesivos en el individuo, por lo que realizar estudios más profundos sobre la expresión de genes recesivos ampliaría la comprensión del fenómeno.

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