[Download] "Polymorphic Nature of Cranial Fluorescence in the Fox Squirrel (Sciurus Niger) from Texas and Oklahoma." by The Texas Journal of Science ~ Book PDF Kindle ePub Free

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eBook details

• Title: Polymorphic Nature of Cranial Fluorescence in the Fox Squirrel (Sciurus Niger) from Texas and Oklahoma.
• Author : The Texas Journal of Science
• Release Date : January 01, 2000
• Genre: Engineering,Books,Professional & Technical,
• Pages : * pages
• Size : 178 KB

Description

Abstract. -- Congenital erythropoietic porphyria (CEP) is a rare pathological condition in man and some domestic animals. Reported diagnostic features include skin lesions, shortened life span, darkened bones and fluorescent skeletal tissues. Literature sources report the condition is characteristic of fox squirrels (Sciurus niger), and that the species suffers no ill effect of the disease. Examination under an ultraviolet light of 157 skulls and associated mandibles of S. niger from Texas and Oklahoma revealed that skeletal fluorescence is a polymorphic feature that affects only about 70 percent of examined specimens. Sexes did not vary in frequency of occurrence of this phenomenon, although adult specimens were significantly more likely to fluoresce than those of younger age classes. Among other findings are the purple fluorescence of nestling and juvenile specimens, in contrast to the orange coloration of older age classes. These results suggest several potential avenues for future study relative to the biogeography and genetics of this phenomenon in S. niger. **********

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