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White-footed mice can survive and thrive in cases of physical defects
One of the authors, Richard Ostfeld, a disease ecologist at the Cary Ecosystem Research Institute, said: "The long-standing assumption is that physical injury will reduce health indicators such as survival, exercise, and quality, but our long-term research results on wild white-footed mice Does not support this
The research team analyzed 26 years of data from a long-term "recapture" project that Ostfeld initiated in 1991 on the Cary Institute's Millbrook, New York property
Francesca Rubino, the lead author of the School of Veterinary Medicine at the University of California, Davis, was a project assistant in Ostfeld's laboratory
To assess the impact of physical injury on the health of mice, they reviewed the trapping records from 1991 to 2016
"As far as we know, previous studies did not include such a large individual sample size or such a long time series
Of the 27,244 mice, 2% (543) had obvious physical defects
Rubino explained: "We have not found any evidence that the physical damage of white-footed mice is related to decreased health
Ostfeld added: "Mice seem to be able to compensate for the breakage or loss of major limbs in some ways-including partial or total loss of vision.
The authors pointed out that this adaptability is consistent with previous studies, which revealed the ability of mice to tolerate certain parasitic infections
G.
Ostfeld concluded: "Our findings challenge a broader hypothesis that physical defects will reduce the health of the body holder, which is inconsistent with the prevailing view in evolutionary biology that devalues damaged individuals
The Cary Ecosystem Institute is an independent non-profit environmental research center