Factors Influencing the Local Distribution of Peromyscus californicus in Northern California

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Abstract
Factors influencing the local distribution of Peromyscus californicus in northern California were investigated. Analysis of stomach contents and laboratory feeding experiments indicated that seeds of Umbellularia californica are a dietary staple. Rates of water consumption of P. californicus were compared in the laboratory with those of P. truei, which shares a similar habitat. An association of P. californicus with the large surface dens of Neotoma fuscipes was found. The restricted geographic distribution of P. californicus may be attributable in part to an interaction of ecological factors associated with the California laurel complex.

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