PMID: 16532209Mar 15, 2006Paper

Seasonal pelage color change: news based on a South American rodent

Anais Da Academia Brasileira De Ciências
Carolina R CamargoAna Maria L Castrucci

Abstract

Mammalian seasonal molting and color change are known to be influenced by photoperiod changes. Calomys laucha, a South American rodent, exhibits seasonal pelage color change; however, unlike Northern hemisphere rodents, which present a gray or brown color during summer and a whitish color during winter, C. laucha pelage changes from an orange color during summer to a dark gray color during winter. Animals maintained for over a year in stationary photoperiod (LD 12:12h, 22 degrees C) presented orange pelage color during the summer corresponding month (January), and gray color during the winter corresponding month (July). Same age animals were evaluated during summer or winter months, and also showed different colors. Animals exposed for 12 weeks to summer or winter artificial conditions displayed color change, not according to the environmental conditions, as expected, but similar to that of animals maintained in stationary photoperiod. These results suggest that pelage color change in C. laucha is controlled by an endogenous circannual rhythm. The adaptive function of C. laucha color change is discussed.

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Citations

Nov 23, 2011·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Carine D CorciniThomaz Lucia
Jul 8, 2016·Brazilian Journal of Biology = Revista Brasleira De Biologia·M L Sandoval SalinasJ D Sandoval
Mar 6, 2018·Biological Reviews of the Cambridge Philosophical Society·Marketa ZimovaL Scott Mills
May 5, 2016·Anais Da Academia Brasileira De Ciências·María L Sandoval SalinasElisa M Colombo
Dec 29, 2020·Neuroscience and Biobehavioral Reviews·Murilo S de AbreuAllan V Kalueff
Aug 26, 2021·Ecology and Evolution·K Anne-Isola NekarisThais Q Morcatty

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