Genetic and environmental determinants of host use in the trematode Maritrema novaezealandensis (Microphallidae)

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Genetic and environmental determinants of host use in the trematode Maritrema novaezealandensis (Microphallidae). / Koehler, A.V.; Gonchar, A.G.; Poulin, R.

In: Parasitology, Vol. 138, 2011, p. 100-106.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{1d0516d1408b49a589f927ffa122ecf4,

title = "Genetic and environmental determinants of host use in the trematode Maritrema novaezealandensis (Microphallidae)",

abstract = "Factors constraining host specificity are poorly understood. Intraspecific variation in host preferences in generalist parasites may reveal which factors affect patterns of host use, and thus the evolution of specialization. Here, laboratory experiments examined genetic variation in host preferences and the effect of a refugium against infection on host use. Firstly, 6 cercarial clones of the trematode Maritrema novaezealandensis (ranging widely in heterozygosities) were exposed simultaneously to 2 alternative hosts, the amphipods Heterophoxus stephenseni and Paracalliope novizealandiae, to assess host preferences and fitness correlations with parasite heterozygosity. All clones showed a distinct preference for H. stephenseni, though the extent of this preference varied among clones. No clear association was found between heterozygosity and either parasite infection success or preference for a particular host. Secondly, cercariae were exposed to the same 2 amphipods in both the presence and absence of sand (r",

keywords = "host specificity, genetic variation, heterozygosity fitness correlation, amphipod, trematode, Maritrema novaezealandensis, Heterophoxus stephenseni, Paracalliope novizealandiae.",

author = "A.V. Koehler and A.G. Gonchar and R. Poulin",

year = "2011",

doi = "doi:10.1017/S0031182010001022",

language = "English",

volume = "138",

pages = "100--106",

journal = "Parasitology",

issn = "0031-1820",

publisher = "Cambridge University Press",

}

RIS

TY - JOUR

T1 - Genetic and environmental determinants of host use in the trematode Maritrema novaezealandensis (Microphallidae)

AU - Koehler, A.V.

AU - Gonchar, A.G.

AU - Poulin, R.

PY - 2011

Y1 - 2011

N2 - Factors constraining host specificity are poorly understood. Intraspecific variation in host preferences in generalist parasites may reveal which factors affect patterns of host use, and thus the evolution of specialization. Here, laboratory experiments examined genetic variation in host preferences and the effect of a refugium against infection on host use. Firstly, 6 cercarial clones of the trematode Maritrema novaezealandensis (ranging widely in heterozygosities) were exposed simultaneously to 2 alternative hosts, the amphipods Heterophoxus stephenseni and Paracalliope novizealandiae, to assess host preferences and fitness correlations with parasite heterozygosity. All clones showed a distinct preference for H. stephenseni, though the extent of this preference varied among clones. No clear association was found between heterozygosity and either parasite infection success or preference for a particular host. Secondly, cercariae were exposed to the same 2 amphipods in both the presence and absence of sand (r

AB - Factors constraining host specificity are poorly understood. Intraspecific variation in host preferences in generalist parasites may reveal which factors affect patterns of host use, and thus the evolution of specialization. Here, laboratory experiments examined genetic variation in host preferences and the effect of a refugium against infection on host use. Firstly, 6 cercarial clones of the trematode Maritrema novaezealandensis (ranging widely in heterozygosities) were exposed simultaneously to 2 alternative hosts, the amphipods Heterophoxus stephenseni and Paracalliope novizealandiae, to assess host preferences and fitness correlations with parasite heterozygosity. All clones showed a distinct preference for H. stephenseni, though the extent of this preference varied among clones. No clear association was found between heterozygosity and either parasite infection success or preference for a particular host. Secondly, cercariae were exposed to the same 2 amphipods in both the presence and absence of sand (r

KW - host specificity

KW - genetic variation

KW - heterozygosity fitness correlation

KW - amphipod

KW - trematode

KW - Maritrema novaezealandensis

KW - Heterophoxus stephenseni

KW - Paracalliope novizealandiae.

U2 - doi:10.1017/S0031182010001022

DO - doi:10.1017/S0031182010001022

M3 - Article

VL - 138

SP - 100

EP - 106

JO - Parasitology

JF - Parasitology

SN - 0031-1820

ER -

ID: 5022096