Molecular and morphological divergence in a pair of bird species and their ectoparasites

Noah K Whiteman, Vishal S. Dosanjh, Ricardo L. Palma, Joshua M. Hull, Rebecca T. Kimball, Pablo Sánchez, José Hernán Sarasola, Patricia G. Parker

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In an evolutionary context, parasites tend to be morphologically conservative relative to their hosts. However, the rate of neutral molecular evolution across many parasite lineages is faster than in their hosts. Although this relationship is apparent at the macroevolutionary scale, insight into the processes underpinning it may be gained through investigations at the microevolutionary scale. Birds and their ectoparasitic lice have served as important natural experiments in co-evolution. Here, we compared mitochondrial and morphological divergence in 2 recently diverged avian host lineages and their parasites. Glapagos hawks (Buteo galapagoensis) are phenotypically divergent from their closest mainland relatives, the Swainson's hawk (Buteo swainsoni). Both species are host to a feather louse species of Craspedorrhynchus (Insecta: Phthiraptera: Ischnocera, Philopteridae). We sequenced the 5′ end of the mitochondrial gene cytochrome oxidase c subunit I (COI) from a set of hawks and lice. Although this fragment allowed unambiguous identification of host and parasite lineages on the islands and the mainland, only a single variable site was present in the 2 hosts, but 2 major Craspedorrhynchus clades divergent by ∼10 were recovered that sorted perfectly with host species. We found significant population genetic structure within the Galpagos Craspedorrhynchus lineage. While the host species are highly differentiated phenotypically, the 2 Craspedorrhynchus louse lineages are phenotypically overlapping, although subtle but significant morphological differences exist.

Original languageEnglish (US)
Pages (from-to)1372-1382
Number of pages11
JournalJournal of Parasitology
Volume95
Issue number6
DOIs
StatePublished - 2009
Externally publishedYes

Fingerprint

Phthiraptera
ectoparasite
ectoparasites
Hawks
Birds
divergence
Parasites
louse
lice
birds
hawks
parasite
Ischnocera
parasites
Buteo
Genetic Drift
Feathers
Mitochondrial Genes
Molecular Evolution
Genetic Structures

ASJC Scopus subject areas

  • Parasitology
  • Ecology, Evolution, Behavior and Systematics
  • Medicine(all)

Cite this

Whiteman, N. K., Dosanjh, V. S., Palma, R. L., Hull, J. M., Kimball, R. T., Sánchez, P., ... Parker, P. G. (2009). Molecular and morphological divergence in a pair of bird species and their ectoparasites. Journal of Parasitology, 95(6), 1372-1382. https://doi.org/10.1645/GE-2009.1

Molecular and morphological divergence in a pair of bird species and their ectoparasites. / Whiteman, Noah K; Dosanjh, Vishal S.; Palma, Ricardo L.; Hull, Joshua M.; Kimball, Rebecca T.; Sánchez, Pablo; Sarasola, José Hernán; Parker, Patricia G.

In: Journal of Parasitology, Vol. 95, No. 6, 2009, p. 1372-1382.

Research output: Contribution to journalArticle

Whiteman, NK, Dosanjh, VS, Palma, RL, Hull, JM, Kimball, RT, Sánchez, P, Sarasola, JH & Parker, PG 2009, 'Molecular and morphological divergence in a pair of bird species and their ectoparasites', Journal of Parasitology, vol. 95, no. 6, pp. 1372-1382. https://doi.org/10.1645/GE-2009.1
Whiteman, Noah K ; Dosanjh, Vishal S. ; Palma, Ricardo L. ; Hull, Joshua M. ; Kimball, Rebecca T. ; Sánchez, Pablo ; Sarasola, José Hernán ; Parker, Patricia G. / Molecular and morphological divergence in a pair of bird species and their ectoparasites. In: Journal of Parasitology. 2009 ; Vol. 95, No. 6. pp. 1372-1382.
@article{20f94c58fa174406a2a8630618e16dcd,
title = "Molecular and morphological divergence in a pair of bird species and their ectoparasites",
abstract = "In an evolutionary context, parasites tend to be morphologically conservative relative to their hosts. However, the rate of neutral molecular evolution across many parasite lineages is faster than in their hosts. Although this relationship is apparent at the macroevolutionary scale, insight into the processes underpinning it may be gained through investigations at the microevolutionary scale. Birds and their ectoparasitic lice have served as important natural experiments in co-evolution. Here, we compared mitochondrial and morphological divergence in 2 recently diverged avian host lineages and their parasites. Glapagos hawks (Buteo galapagoensis) are phenotypically divergent from their closest mainland relatives, the Swainson's hawk (Buteo swainsoni). Both species are host to a feather louse species of Craspedorrhynchus (Insecta: Phthiraptera: Ischnocera, Philopteridae). We sequenced the 5′ end of the mitochondrial gene cytochrome oxidase c subunit I (COI) from a set of hawks and lice. Although this fragment allowed unambiguous identification of host and parasite lineages on the islands and the mainland, only a single variable site was present in the 2 hosts, but 2 major Craspedorrhynchus clades divergent by ∼10 were recovered that sorted perfectly with host species. We found significant population genetic structure within the Galpagos Craspedorrhynchus lineage. While the host species are highly differentiated phenotypically, the 2 Craspedorrhynchus louse lineages are phenotypically overlapping, although subtle but significant morphological differences exist.",
author = "Whiteman, {Noah K} and Dosanjh, {Vishal S.} and Palma, {Ricardo L.} and Hull, {Joshua M.} and Kimball, {Rebecca T.} and Pablo S{\'a}nchez and Sarasola, {Jos{\'e} Hern{\'a}n} and Parker, {Patricia G.}",
year = "2009",
doi = "10.1645/GE-2009.1",
language = "English (US)",
volume = "95",
pages = "1372--1382",
journal = "Journal of Parasitology",
issn = "0022-3395",
publisher = "American Society of Parasitologists",
number = "6",

}

TY - JOUR

T1 - Molecular and morphological divergence in a pair of bird species and their ectoparasites

AU - Whiteman, Noah K

AU - Dosanjh, Vishal S.

AU - Palma, Ricardo L.

AU - Hull, Joshua M.

AU - Kimball, Rebecca T.

AU - Sánchez, Pablo

AU - Sarasola, José Hernán

AU - Parker, Patricia G.

PY - 2009

Y1 - 2009

N2 - In an evolutionary context, parasites tend to be morphologically conservative relative to their hosts. However, the rate of neutral molecular evolution across many parasite lineages is faster than in their hosts. Although this relationship is apparent at the macroevolutionary scale, insight into the processes underpinning it may be gained through investigations at the microevolutionary scale. Birds and their ectoparasitic lice have served as important natural experiments in co-evolution. Here, we compared mitochondrial and morphological divergence in 2 recently diverged avian host lineages and their parasites. Glapagos hawks (Buteo galapagoensis) are phenotypically divergent from their closest mainland relatives, the Swainson's hawk (Buteo swainsoni). Both species are host to a feather louse species of Craspedorrhynchus (Insecta: Phthiraptera: Ischnocera, Philopteridae). We sequenced the 5′ end of the mitochondrial gene cytochrome oxidase c subunit I (COI) from a set of hawks and lice. Although this fragment allowed unambiguous identification of host and parasite lineages on the islands and the mainland, only a single variable site was present in the 2 hosts, but 2 major Craspedorrhynchus clades divergent by ∼10 were recovered that sorted perfectly with host species. We found significant population genetic structure within the Galpagos Craspedorrhynchus lineage. While the host species are highly differentiated phenotypically, the 2 Craspedorrhynchus louse lineages are phenotypically overlapping, although subtle but significant morphological differences exist.

AB - In an evolutionary context, parasites tend to be morphologically conservative relative to their hosts. However, the rate of neutral molecular evolution across many parasite lineages is faster than in their hosts. Although this relationship is apparent at the macroevolutionary scale, insight into the processes underpinning it may be gained through investigations at the microevolutionary scale. Birds and their ectoparasitic lice have served as important natural experiments in co-evolution. Here, we compared mitochondrial and morphological divergence in 2 recently diverged avian host lineages and their parasites. Glapagos hawks (Buteo galapagoensis) are phenotypically divergent from their closest mainland relatives, the Swainson's hawk (Buteo swainsoni). Both species are host to a feather louse species of Craspedorrhynchus (Insecta: Phthiraptera: Ischnocera, Philopteridae). We sequenced the 5′ end of the mitochondrial gene cytochrome oxidase c subunit I (COI) from a set of hawks and lice. Although this fragment allowed unambiguous identification of host and parasite lineages on the islands and the mainland, only a single variable site was present in the 2 hosts, but 2 major Craspedorrhynchus clades divergent by ∼10 were recovered that sorted perfectly with host species. We found significant population genetic structure within the Galpagos Craspedorrhynchus lineage. While the host species are highly differentiated phenotypically, the 2 Craspedorrhynchus louse lineages are phenotypically overlapping, although subtle but significant morphological differences exist.

UR - http://www.scopus.com/inward/record.url?scp=76749124864&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=76749124864&partnerID=8YFLogxK

U2 - 10.1645/GE-2009.1

DO - 10.1645/GE-2009.1

M3 - Article

C2 - 19655998

AN - SCOPUS:76749124864

VL - 95

SP - 1372

EP - 1382

JO - Journal of Parasitology

JF - Journal of Parasitology

SN - 0022-3395

IS - 6

ER -