Genetic Diversity and Capillaria hepatica (Nematoda) Prevalence in Michigan Deer Mouse Populations

Meagher, Shawn

doi:10.2307/2640837

Cited by 46 publications

(46 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prevalence observations reflect those from our previous experiment using a single resistant line of B. glabrata (Sandland et al 2007). Taken together, these prevalence results were somewhat unexpected given that outcrossing has been associated with reduced infection in other host-parasite systems (Meagher 1999;Acevedo-Whitehouse et al 2003). Two explanations may help to resolve these differences.…”

Section: Discussionmentioning

confidence: 33%

Effects of host outcrossing on the interaction between an aquatic snail and its locally adapted parasite

et al. 2009

View full text Add to dashboard Cite

In this study, we investigated the interaction between host outcrossing and infection in the Biomphalaria glabrata-Schistosoma mansoni system. Snails collected from three susceptible isofemale lines were mated with either siblings or snails recently derived from a field site in Brazil. Resulting inbred and outcrossed progeny were then exposed to S. mansoni larvae and monitored for a 10-week period. Interestingly, all snails exhibited equal susceptibility whether they were the result of inbreeding or outcrossing. However, further examination of both host and parasite life-history traits uncovered significant differences between the groups. In uninfected snails, outcrossed progeny tended to exhibit greater fitness relative to inbred progeny. When snails were parasitized, these differences were magnified in certain life-history traits, particularly host reproduction and survival. As an extension of the work, we also investigated virulence within this host-parasite system. Estimates of parasite reproduction and host size were combined to generate a novel "exploitation index," and these indices were regressed with host survivorship. As predicted, there was a significant and negative correlation between the variables, but this was restricted to a single snail line. Results from this study demonstrate that infection outcomes (as measured by prevalence) may not differ between inbred and outcrossed hosts. However, outcrossing may enhance snail fitness through life-history trait expression.

show abstract

Section: Discussionmentioning

confidence: 33%

Effects of host outcrossing on the interaction between an aquatic snail and its locally adapted parasite

et al. 2009

View full text Add to dashboard Cite

show abstract

“…This could either be due to a change in the behavior of chipmunks or to a higher rate of dissemination in the native host populations. This result also suggests that chipmunks in H. Sellier Park may be less resistant against infection than other populations, as found for inbred populations of small rodents on small islands (Meagher 1999).…”

Section: Discussionsupporting

confidence: 58%

Helminth fauna of the Siberian chipmunk, Tamias sibiricus Laxmann (Rodentia, Sciuridae) introduced in suburban French forests

Pisanu¹,

Jerusalem²,

Huchery³

et al. 2006

Parasitol Res

View full text Add to dashboard Cite

The spread of an immigrant host species can be influenced both by its specific helminth parasites that come along with it and by newly acquired infections from native fauna. The Siberian chipmunk, Tamias sibiricus Laxmann (Rodentia, Sciuridae), a northeastern Eurasiatic ground nesting Sciurid, has been introduced in France for less than three decades. Thirty individuals were collected from three suburban forests in the Ile-de-France Region between 2002 and 2006. Two intestinal nematode species dominated the helminth fauna: Brevistriata skrjabini [Prevalence, P, 99% C.I., 87% (64-97%); mean intensity, M.I., 99% C.I., 43 (28-78)] and Aonchotheca annulosa [P, 47% (25-69%); M.I., 35 (3-157)]. B. skrjabini is a direct life cycle nematode species of North Eurasiatic origin, with a restricted spectrum of phylogenetically related suitable hosts. This result indicates that B. skrjabini successfully settled and spread with founder pet chipmunks maintained in captivity and released in natura. Chipmunks acquired A. annulosa, a nematode species with a large spectrum of phylogenetically unrelated suitable host species, from local Muroid rodent species with similar behavior, life-history traits and habitats. Quantitative studies are needed to evaluate the potential for both B. skrjabini and A. annulosa to impede the spread of Tamias and for B. skrjabini to favor chipmunk colonization through detrimental effects upon native co-inhabiting host species.

show abstract

“…However, it has been suggested that populations experiencing bottleneck(s) may be less susceptible to future inbreeding depression because they would be 'purged' of deleterious recessive alleles (Crnokrak and Barrett 2002). Despite that 'purging' has been suggested as a possible tool in the management of endangered species in captive breeding programs, several factors make this approach highly unreliable (reviewed in (Leberg and Firmin 2007)): (i) the genetic basis of inbreeding depression is generally unknown and probably highly variable among species, (ii) laboratory experiments indicated a high variance in the response to purging among replicates, probably because drift causes stochastic, deleterious, changes in genetic composition, (iii) purging is more efficient with slow inbreeding and large population sizes, (iv) purging on some loci may be effective only in the environment in which purging occurred, and (v) purging may reduce both viability and adaptability (e.g., genetically variable populations can better withstand disease epidemics compared to less variable populations (Lively et al 1990;Coltman et al 1999;Meagher 1999)) as well as increase extinction risks. Given the unpredictability of purging, inbreeding is probably best avoided in captive breeding and restauration programs by maximizing variability (Montgomery et al 1997;Milinkovitch et al 2004;Leberg and Firmin 2007) and retaining the population structure observed in the wild (Tzika et al 2008).…”

Section: Discussionmentioning

confidence: 98%

Molecular genetic analysis of a captive-breeding program: the vulnerable endemic Jamaican yellow boa

et al. 2008

View full text Add to dashboard Cite

The endemic Jamaican boa (or ''yellow boa'', Epicrates subflavus) is a vulnerable species of the Caribbean biodiversity hotspot whose natural populations greatly declined mainly due to predation by introduced species, human persecution, and habitat destruction. A captive breeding program was initiated in 1976 and rationalized in 2002 by the establishment of a European Endangered Species Program. During the last 30 years, more than 600 offspring, of which 80 are still alive today, have been produced and distributed among European host institutions and privates. Here, using nine nuclear microsatellite loci and a fragment of the mitochondrial cytochrome b gene, we (i) determine the natural population from which the founders originate, (ii) identify parental allocation errors and ambiguities in the studbook, and (iii) assess the genetic diversity and estimate levels of inbreeding of the current captive population based on loss of alleles, variance in reproductive success, and relatedness among individuals. Combining measures of relatedness derived from multilocus genotypes with practical parameters such as age of animals and localization of host institutions, we propose mating groups that would maximize genetic diversity in the captive population of the Jamaican boa. Our analyses provide guidance for a more efficient breeding program that, in turn, could be used as the starting point of a repatriation program to increase the probability of the species long-term survival.

show abstract

Genetic Diversity and Capillaria hepatica (Nematoda) Prevalence in Michigan Deer Mouse Populations

Cited by 46 publications

References 40 publications

Effects of host outcrossing on the interaction between an aquatic snail and its locally adapted parasite

Effects of host outcrossing on the interaction between an aquatic snail and its locally adapted parasite

Helminth fauna of the Siberian chipmunk, Tamias sibiricus Laxmann (Rodentia, Sciuridae) introduced in suburban French forests

Molecular genetic analysis of a captive-breeding program: the vulnerable endemic Jamaican yellow boa

Contact Info

Product

Resources

About