Condition of type specimens of the genus Peromyscus

Article Abstract:

Two hundred fourteen type specimens of the genus Peromyscus, preserved and stored by standard methods, were examined to document specimen condition. 85 percent of the specimens had some kind of damage in skins, skulls and associated labels. Loss of specimen integrity is due to the interaction of mechanical, chemical and biological damages. Deterioration has been progressive over time, so that there is a need to improve collection care. There is also a need to scientifically document and test the viability of various methods in systematics collections.

Collections and collecting, Peromyscus, Zoological specimens, Animal specimens, Zoological museums

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Path selection by Peromyscus leucopus in the presence and absence of vegetative cover

Article Abstract:

Peromyscus leucopus marked with fluorescent powder were tracked down to determine path selection. Pathway choice is a function of available vegetative ground cover. Logs are the most widely used type of substrate in the absence of vegetative ground cover. P. leucopus prefer to travel on soft, large-diameter logs. They prefer forbs, which provide excellent cover, in vegetation-rich places. P. leucopus appear to restrict their movements to areas that offer adequate protection from predation.

Behavior, Influence, Home range, Animal behavior, Plant communities, Habitat selection, Peromyscus leucopus, White-footed mouse

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Body mass and size in female deer mice, Peromyscus maniculatus, as a function of time since breeding

Article Abstract:

Body masses of 16 littermate pairs of female deer mice, Peromyscus maniculatus, were compared before and after pairing and breeding with a male or pairing with a female. Females that have produced several litters have significantly higher body mass and length than unmated females for a period of several months after the end of reproductive activity. These findings are likely to be applicable in the field, and should therefore be considered in researches in which such animals are studied.

Measurement, Physiological aspects, Body size, Body weights and measures, Body weight, Sexual cycle, Peromyscus maniculatus

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