Advanced

Morphological variation between populations of the expanding ectoparasitic deer ked Lipoptena cervi (Diptera: Hippoboscidae) in Fennoscandia

Jaakola, Mervi; Ojanen, Meri; Hurme, Eija; Mutanen, Marko; Wahlberg, Niklas LU ; Välimäki, Panu and Kaitala, Arja (2015) In Biological Journal of the Linnean Society 116(2). p.432-448
Abstract

We examined morphological and genetic differences among Fennoscandian deer ked (Lipoptena cervi L, Hippoboscidae) populations with varying expansion history: the eastern population (Finland) has expanded rapidly, whereas the western population is divided into an old and relatively stationary sub-population in Sweden and a newly established and more expansive sub-population in Norway. The genetic analysis suggests that the distinct populations represent a single species. Individuals from expansive populations were characterized by a large body size, relatively large and robust thorax shape, and wing shape with an exaggerated basal posterior margin. Yet, there was no among population variation in relative wing size or its elongated shape... (More)

We examined morphological and genetic differences among Fennoscandian deer ked (Lipoptena cervi L, Hippoboscidae) populations with varying expansion history: the eastern population (Finland) has expanded rapidly, whereas the western population is divided into an old and relatively stationary sub-population in Sweden and a newly established and more expansive sub-population in Norway. The genetic analysis suggests that the distinct populations represent a single species. Individuals from expansive populations were characterized by a large body size, relatively large and robust thorax shape, and wing shape with an exaggerated basal posterior margin. Yet, there was no among population variation in relative wing size or its elongated shape after variation in overall size was controlled for. Although certain size and shape variables showed thermal sensitivity, the degree of plasticity did not differ between the populations. In general, we observed that shape is more sensitive to external thermal conditions at the pupal stage than size per se, with the thermal sensitivity of the latter depending on the trait under examination. We conclude that the possible adaptive value of morphological differences relies on variation in survival during the off-host life stages or short-distance flight to reach a susceptible host instead of long-distance dispersal ability.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Development temperature, Geometric morphometrics, Invasive species, Phenotypic plasticity, Pupal phase, Pupiparous, Range expansion, Temperature-size rule, Viviparous
in
Biological Journal of the Linnean Society
volume
116
issue
2
pages
17 pages
publisher
Linnean Society of London
external identifiers
  • scopus:84941117340
ISSN
0024-4066
DOI
10.1111/bij.12587
language
English
LU publication?
yes
id
efe297c8-f011-4dcf-b486-d75fde32e385
date added to LUP
2016-04-27 21:14:10
date last changed
2017-02-12 04:32:23
@article{efe297c8-f011-4dcf-b486-d75fde32e385,
  abstract     = {<p>We examined morphological and genetic differences among Fennoscandian deer ked (Lipoptena cervi L, Hippoboscidae) populations with varying expansion history: the eastern population (Finland) has expanded rapidly, whereas the western population is divided into an old and relatively stationary sub-population in Sweden and a newly established and more expansive sub-population in Norway. The genetic analysis suggests that the distinct populations represent a single species. Individuals from expansive populations were characterized by a large body size, relatively large and robust thorax shape, and wing shape with an exaggerated basal posterior margin. Yet, there was no among population variation in relative wing size or its elongated shape after variation in overall size was controlled for. Although certain size and shape variables showed thermal sensitivity, the degree of plasticity did not differ between the populations. In general, we observed that shape is more sensitive to external thermal conditions at the pupal stage than size per se, with the thermal sensitivity of the latter depending on the trait under examination. We conclude that the possible adaptive value of morphological differences relies on variation in survival during the off-host life stages or short-distance flight to reach a susceptible host instead of long-distance dispersal ability.</p>},
  author       = {Jaakola, Mervi and Ojanen, Meri and Hurme, Eija and Mutanen, Marko and Wahlberg, Niklas and Välimäki, Panu and Kaitala, Arja},
  issn         = {0024-4066},
  keyword      = {Development temperature,Geometric morphometrics,Invasive species,Phenotypic plasticity,Pupal phase,Pupiparous,Range expansion,Temperature-size rule,Viviparous},
  language     = {eng},
  month        = {10},
  number       = {2},
  pages        = {432--448},
  publisher    = {Linnean Society of London},
  series       = {Biological Journal of the Linnean Society},
  title        = {Morphological variation between populations of the expanding ectoparasitic deer ked Lipoptena cervi (Diptera: Hippoboscidae) in Fennoscandia},
  url          = {http://dx.doi.org/10.1111/bij.12587},
  volume       = {116},
  year         = {2015},
}