Loss of behavioural dominance in male mice infected with <i>Trichinella spiralis</i>

Me, Rau

doi:10.1017/s0031182000054615

Cited by 30 publications

(15 citation statements)

References 6 publications

(6 reference statements)

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“…Social status has been associated with parasite infection in several host species (Freeland, 1981;Rau, 1983Rau, , 1984Halvorsen, 1986). During periods of stable dominance relationships, high-ranking male baboons at Amboseli had a significantly higher overall parasite egg emission than low ranking males (Hausfater & Watson 1976).…”

Section: Discussionmentioning

confidence: 99%

Intestinal parasite burden in five troops of olive baboons (Papio cynocephalus anubis) in Gombe Stream National Park, Tanzania

1996

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A cross-sectional parasitological study of a population of wild olive baboons (Papio cynocephalus anubis), consisting of 5 troops, was conducted in Gombe Stream National Park. Baboons were individually recognizable. Information on age, sex, troop membership, reproductive status, social rank and life-history of each individual baboon could be related to parasite infection. Seven helminth taxa and 2 protozoan taxa were found. All baboons were parasitized by at least 1 taxon. Distributions of helminths were aggregated among hosts. There were significant differences among troops in the prevalence of all but 2 of the recorded helminths. Age had a significant impact on the prevalence and intensity of Strongyloides sp. No significant effect of sex on the prevalence of infection could be detected. There was some indication that female reproductive status was related to Trichuris egg output. In contrast to a previous study, no significant correlations between parasite infection and social rank could be found. Troop membership constituted the predominant factor contributing to heterogeneity of prevalence of infection. This suggests that spatial location and/or genetics may be important in determining levels of parasite infection.

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Section: Discussionmentioning

confidence: 99%

Intestinal parasite burden in five troops of olive baboons (Papio cynocephalus anubis) in Gombe Stream National Park, Tanzania

1996

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“…On the basis of the manipulation hypothesis (Dawkins 1990;Combes 1995), parasites could modify the establishment of behavioural dominance in order to cause a loss of host social status. This has been demonstrated by Rau (1983Rau ( , 1984 for rodents infected by Trichinella spiralis. The consequence of this manipulation is the expulsion of the infected host from the group.…”

Section: Discussionmentioning

confidence: 68%

Behavioural dominance and Taenia crassiceps parasitism in BALB/c male mice

Gourbal

Lacroix

Gabrion

2002

Parasitology Research

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Behavioural dominance relationships in mouse populations are based upon fighting and antagonistic behaviour. Social rank is affected by the physiological states present in the mice. Experimental infection by Taenia crassiceps cysticerci induced physiological disorders and disrupted the dominant-subordinate status. Infected male mice showed strong perturbations in territorial behaviour and aggressiveness. Infected dominant male mice did not show a significant reversal of dominance order compared to uninfected mice. In addition, during confrontation between naive infected and healthy mice, infected animals more often assumed a subordinate status than healthy ones. The effects of the infection by T. crassiceps were more likely to prevent adult male mice from becoming behaviourally dominant than to reverse existing dominance relationships. The results are discussed on the basis of the parasite manipulation hypothesis and host optimal foraging and decision-making theories.

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“…Furthermore, their effects were closely associated with stages of their intrahost development known to cause pathological changes or host exhaustion. On the other hand Rau (1983bRau ( , 1984a demonstrated that T. spiralis in mice caused subordinance and reversed previously existing dominance and hypothesized that this effect may be associated with the lower activity exhibited by infected individuals. In contrast Berdoy et al (1995b) demonstrated that T. gondii specifically altered rat activity and had no effect on elements of social behaviour.…”

Section: Discussionmentioning

confidence: 99%

Effect of two helminth parasites on the open-field behaviour of albino mice

Chipev¹,

Stephanov²,

Laleva³

1997

Mammalia

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The effect of Trichinella spiralis and Hymenolepis fraterna on the open-field behaviour of laboratory mice was studied on different days following infection. The hypothesis that helminths with different life-styles will alter specifically the activity of the host so as to increase transmission probability was tested. The results obtained indicated that both parasites produced a qualitatively similar inhibitory effect on mice activity in the open-field. However, significant quantitative differences in their effects were observed. T. spiralis strongly reduced the locomotory and exploratory activity of the mice. The beginning of the effect coincided with the peak of muscle invasion by T. spiralis larvae (day 14 p.i.) and persisted until the end of the experiment (day 30 p.i.). H. fraterna affected much less mice activity. The infection resulted mainly in reduced host locomotion, but the effect was demonstrated only after H. fraterna matured and started oviproduction in the host (14-20 days p.i.). Both parasites studied changed also the pattern of host locomotory activity dynamics during the 15 min open-field tests. It is suggested that altered host activity by the parasites, although qualitatively similar, may involve different mechanisms. The observed alterations in host behaviour are discussed in terms of the manipulation hypothesis. It is concluded that infection did not alter specifically mice open-field behaviour and the observed decline in host activity is the side effect of pathology or other constrains set by the parasites, rather than specific evolutionary based alteration of behaviour.

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Loss of behavioural dominance in male mice infected with Trichinella spiralis

Cited by 30 publications

References 6 publications

Intestinal parasite burden in five troops of olive baboons (Papio cynocephalus anubis) in Gombe Stream National Park, Tanzania

Intestinal parasite burden in five troops of olive baboons (Papio cynocephalus anubis) in Gombe Stream National Park, Tanzania

Behavioural dominance and Taenia crassiceps parasitism in BALB/c male mice

Effect of two helminth parasites on the open-field behaviour of albino mice

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