Increased prevalence of bot flies (&lt;i&gt;Cuterebra fontinella&lt;/i&gt;) on white-footed mice (&lt;i&gt;Peromyscus leucopus&lt;/i&gt;) near forest edges

Wolf, Mosheh; Batzli, George O.

doi:10.1139/cjz-79-1-106

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Can. J. Zool.

2001

DOI: 10.1139/cjz-79-1-106

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Increased prevalence of bot flies (<i>Cuterebra fontinella</i>) on white-footed mice (<i>Peromyscus leucopus</i>) near forest edges

Mosheh Wolf¹,

George O. Batzli²

Abstract: Several studies have suggested that forest edge is preferred habitat for white-footed mice (Peromyscus leucopus). Because previous research has shown that parasitism by bot flies (Cuterebra fontinella) is higher in open areas than in woodlands, lower rates of infestation at woodland edges could partly explain the greater preference for woodland edges by the mice. We recorded the prevalence and load of bot fly larvae in mice trapped along edge-tointerior gradients in four forested areas in east-central Illinois… Show more

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Cited by 10 publications

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Effects of forest edge on populations of white‐footed mice Peromyscus leucopus

Wolf¹,

Batzli²

2002

Ecography

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Several studies have reported higher densities of white‐footed mice in small fragments than in large fragments of eastern deciduous forests. The edge hypothesis states that higher densities in smaller fragments reflect an increase in relative amount of edge habitat, which supports higher densities of mice because of its higher quality. To test this hypothesis we live trapped white‐footed mice along edge‐to‐interior gradients in forest fragments of east‐central Illinois. Our results indicated a greater abundance of mice in the forest interior than near the edge, which did not support the edge hypothesis. This pattern could occur because dominant adults hold larger territories of higher quality habitat, thereby reducing density and increasing fitness near the edge (an ideal despotic distribution). We found some evidence of increased reproductive success (juveniles per female) at the edge, but this could reflect density‐dependent demographic processes rather than habitat quality. Furthermore, other indicators of dominance (body weight, and reproductive activity) did not show an increase at the edge, and other studies indicate higher prevalence of natural enemies at edges, which could account for lower densities there. Reduced competition from larger rodents and reduced predation could cause higher densities in small fragments but the distributions of competitors and predators do not strongly support these hypotheses. We suggest two additional hypotheses that could account for greater densities in smaller fragments: 1) estimates of high densities could be artifacts of the large effect that a few captures can have on density estimates for very small fragments, and 2) densities in smaller fragments are overestimated because mice use a relatively larger area of surrounding habitat as fragment size decreases.

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Effects of forest edge on populations of white‐footed mice Peromyscus leucopus

Wolf¹,

Batzli²

2002

Ecography

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Botfly parasitism and tourism on the endangered black howler monkey of Belize

Treves

Carlson

2012

J of Medical Primatology

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Stress and parasitism of white-footed mice (Peromyscus leucopus) in dry and floodplain environments

Brown

Fuller

2006

Can. J. Zool.

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We hypothesized that flooding represents an environmental stressor that might affect the corticosterone levels, parasite prevalence, and life history of small mammals living in floodplain environments. We compared populations of white-footed mice (Peromyscus leucopus (Rafinesque, 1818)) on floodplains and dry areas. We found more males on floodplains (p = 0.008) and more females on dry areas (p = 0.005). There were no differences in mass (p > 0.05) or intestinal parasite prevalence (p = 0.665) between dry and floodplain habitats, but bot fly larvae were significantly more prevalent in males living on floodplains (p = 0.043). Floodplain animals had significantly higher levels of corticosterone than dry-area animals in fall, and lower levels in summer (F[1,20] = 4.483, p = 0.047). In addition, we found that animals with intestinal parasites had higher levels of corticosterone than those that were without parasites (p = 0.014) or that harbored bot fly larvae (p = 0.001). Floodplains seem to be harsher environments than dry areas, but this may be a result of differences in habitat rather than a direct result of flooding.Résumé : Nous émettons l'hypothèse selon laquelle les inondations représentent des facteurs environnementaux de stress qui peuvent affecter les concentrations de corticostérone, la prévalence des parasites et le cycle biologique chez de petits mammifères qui habitent dans les milieux de plaines de débordement. Nous comparons les populations de souris à pieds blancs (Peromyscus leucopus (Rafinesque, 1818)) dans des plaines de débordement et des zones sèches. Nous trouvons plus de mâles dans les plaines de débordement (p = 0,008) et plus de femelles dans les régions sèches (p = 0,005). Il n'y a pas de différence de masse (p > 0,05), ni de prévalence de parasites intestinaux (p = 0,665) entre les habitats de plaine de débordement et de région sèche; cependant, les larves d'oestres ont une prévalence significativement plus grande chez les mâles habitant les plaines de débordement (p = 0,043). Les animaux de la plaine de débordement ont des concentrations significativement plus élevées de corticostérone que les animaux des régions sèches en automne et des concentrations plus faibles en été (F [1,20] = 4,483, p = 0,047). De plus, les animaux portant des parasites intestinaux ont des concentrations plus élevées de corticostérone que ceux qui sont sans parasites (p = 0,014) ou qui portent des larves d'oestres (p = 0,001). Les plaines de débordement semblent donc être des habitats plus rudes que les régions sèches, mais cela peut résulter de différences entre les habitats plutôt qu'être un effet direct des inondations.[Traduit par la Rédaction]

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Increased prevalence of bot flies (<i>Cuterebra fontinella</i>) on white-footed mice (<i>Peromyscus leucopus</i>) near forest edges

Cited by 10 publications

References 27 publications

Effects of forest edge on populations of white‐footed mice Peromyscus leucopus

Effects of forest edge on populations of white‐footed mice Peromyscus leucopus

Botfly parasitism and tourism on the endangered black howler monkey of Belize

Stress and parasitism of white-footed mice (Peromyscus leucopus) in dry and floodplain environments

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