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Differences in exocuticle thickness in Leucorrhinia dubia (Odonata) larvae from habitats with and without fish
Halmstad University, School of Business and Engineering (SET).
Halmstad University, School of Business and Engineering (SET).
2006 (English)Independent thesis Basic level (degree of Bachelor)Student thesis
Abstract [en]

Many prey species are able to develop different morphological structures as defence against

for example predators. Some of these structures are induced only by individuals exposed to a

predator. This phenomenon is called phenotypic plasticity. In this paper we examine whether

cuticle thickness in Leucorrhinia dubia (Odonata) larvae differed between specimens caught

in fish containing lakes and fish-free lakes respectively. We measured the thickness of the

cuticle from four different parts of the larvae; profemur, pronotum, ninth segment sternite and

ninth segment tergite. Our results showed a significantly thicker exocuticle on profemur in

larvae with a head width bigger than 4.5 mm caught in lakes with fish. The smaller larvae

showed a tendency to have thinner exocuticle on profemur in presence of fish. We discuss the

probability that the differences in exocuticle thickness on profemur could be some kind of

trade-off situation. The results also showed a tendency among the large larvae; the large

individuals from lakes containing fish had a slightly thicker exocuticle on pronotum than the

bigger individuals from fish-free lakes.

Place, publisher, year, edition, pages
Högskolan i Halmstad/Sektionen för Ekonomi och Teknik (SET) , 2006. , p. 330617 bytes
Keywords [en]
Phenotypic plasticity, Morphological adaptations, Dragonflies, Cuticle thickness, Induced defences
Identifiers
URN: urn:nbn:se:hh:diva-169Local ID: 2082/422OAI: oai:DiVA.org:hh-169DiVA, id: diva2:237347
Uppsok
Life Earth Science
Available from: 2006-08-31 Created: 2006-08-31 Last updated: 2009-08-20

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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More languages
Output format
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