Can the nematode <i>Capillaria hepatica</i> regulate abundance in wild house mice? Results of enclosure experiments in southeastern Australia

Barker, Stephen C.; Singleton, Grant R.; Spratt, DM

doi:10.1017/s0031182000059965

Cited by 23 publications

(9 citation statements)

References 33 publications

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“…Post hoc power analyses showed that the minimum detectable difference between treatments (a0/0.05, b0/0.8) was 75 individuals whereas the range of final population sizes was 82 Á/160. This two-fold difference in population densities between replicates is comparable to the variance observed by Barker et al (1991) using the same enclosures. Lower population sizes were not related to poor survival of founding females, nor access to food, which was provided ad libitum to all enclosures.…”

Section: Sourcesupporting

confidence: 71%

Does maternal condition or predation risk influence small mammal population dynamics?

Banks¹,

Powell²

2004

Oikos

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2004. Does maternal condition or predation risk influence small mammal population dynamics? Á/ Oikos 106: 176 Á/184.There is strong debate over whether the intrinsic traits of individuals or the extrinsic environment exert the greater influence on small mammal population dynamics. We test the roles of maternal effects (an intrinsic factor) and predation risk (an extrinsic factor) in the population dynamics of wild strain house mice using a 2-factor enclosure experiment. Pre-release supplemental feeding with a high-fat diet created female treatment founders that were 6 Á/10% heavier than controls, a condition that we predicted would be passed on as a maternal effect. Predation risk was enhanced using regular application of predator (red fox Vulpes vulpes ) scats. Founder populations of six females and six males released into eight, 15)/15 m enclosures showed near exponential population growth over 17 weeks (maximum 3 generations). But there were no responses to either treatment in terms of survival, inherited body weights, fecundity or population size. We suggest that elevated maternal condition may have only minor and transient intergenerational effects with little long-term consequence. We also suggest that the general significance of predator scats as a cue to predation risk to alter prey behaviour may have been overestimated. Hence our results question the role of either factor in causing long-term responses that influence condition to affect population processes.

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Section: Sourcesupporting

confidence: 71%

Does maternal condition or predation risk influence small mammal population dynamics?

Banks¹,

Powell²

2004

Oikos

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“…Towards this end, research has focused on the potential of a parasitic nematode to prevent mouse plagues [e.g. 4,5] and on viruses which occur naturally in mice at 15 locations in southeastern Australia [6]. A survey of the latter revealed antibodies to 8 of 14 viruses.…”

Section: Introductionmentioning

confidence: 99%

Prevalence of viral antibodies and helminths in field populations of house mice (Mus domesticus) in southeastern Australia

et al. 1993

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A 13-month study of wild mice (MVus domesticus) in wheatlands in southeastern Australia contrasted changes in the seroprevalence of antibody to 13 viruses and the occurrence of helminths with changes in their population dynamics. Mice were seropositive for mouse hepatitis virus (MHV), rotavirus, minute virus of mice (MVM), mouse adenovirus (MAdV), reovirus (reo 3), and murine cytomegalovirus (MCMV). The seroprevalences of all but rotavirus varied significantly with time and increased with host density. Near the end of the study, host density declined rapidly and the seroprevalence of MVM and reo 3 increased significantly. These two viruses had low seroprevalence when host survival was high and high seroprevalence when host survival was low, indicating they may play a role in regulating mouse populations. In the case of MVM, there was evidence of a viral epizootic during the decline in mouse abundance. The prevalence of four helminths (Taenia taeniaeformis, Syphacia obvelata, and Vampirolepis spp.) differed significantly with time but showed no apparent association with host density. These findings highlight the need for further study on the effect of viruses on the population dynamics of mice.

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“…Another naturally occurring biological control agent (Capillaria hepatica) for controlling mice also did not aVect neither the breeding performance nor the rate of increase in mouse populations conWned in pens (Barker et al 1991). The inability of this parasite to control mice was critically demonstrated with a large scale manipulative Weld experiment (Singleton and Chambers 1996).…”

Section: Discussionmentioning

confidence: 99%

“…There have been only a small number of experimental attempts to develop biological control against vertebrates (e.g. Barker et al 1991;Gregory 1992;Hamilton et al 2005;Singleton et al 1995;Spratt 1990). Recently, a replicated Weld trial demonstrated that a protozoan parasites (Sarcocystis singaporensis) reduced damage to rice crops caused by rats in Thailand (Jakel et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Does streptobacillary arthritis reduce house mouse population density, activity and damage to sorghum crops?

Kaboodvandpour

Leung

2007

J Pest Sci

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An experiment to examine the eVect of streptobacillary arthritis on mouse populations was conducted in maturing sorghum crops in mouse-proofed pens. There were three treatment pens and three control pens in which mice with and without clinical signs of streptobacillary arthritis were introduced, respectively. A constant mouse density (533 mice ha ¡1 ) was introduced to the pens by releasing 12 mice in each pen. The sex ratio of introduced mice was also constant by releasing in each pen nine males and three females. Mean track index was lower in treatment pens than in control pens, indicating that streptobacillary arthritis reduced the activity of mice. However, this was not translated into a reduction in other population responses. Mean mouse density at harvest, percentage of female pregnant at harvest, yield loss caused by mice and a feeding index (oil card index) did not diVer signiWcantly between treatment and control groups. A plausible explanation for these Wndings was that mice with the clinical signs might be less active but were able to consume as much grains as mice without the clinical signs because food was in abundant supply.

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Can the nematode Capillaria hepatica regulate abundance in wild house mice? Results of enclosure experiments in southeastern Australia

Cited by 23 publications

References 33 publications

Does maternal condition or predation risk influence small mammal population dynamics?

Does maternal condition or predation risk influence small mammal population dynamics?

Prevalence of viral antibodies and helminths in field populations of house mice (Mus domesticus) in southeastern Australia

Does streptobacillary arthritis reduce house mouse population density, activity and damage to sorghum crops?

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