Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effekten av predatorinducerade morfologiska förändringar hos Rana temporaria
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2017 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
The effect of predatorinduced morphological changes in Rana temporaria (English)
Abstract [en]

Phenotypic plasticity is the ability of an organism to express different phenotypes depending on the biotic or abiotic environment. In many cases, the response to the environment is beneficial to the individual and can therefore represent adaptive phenotypic plasticity. An example includes morphological and life-historical response to predators. Because there has been a weak interest in the effect of these morphological changes, and it often assumes, but rarely shown, that predator-induced changes are adaptive. I tested how different variables, such as maximum acceleration and velocity, were related to each other in different Gosner stages. Eggs and tadpoles of the species Rana temporaria were exposed to various predator enclosures, a control, a stalking predator (European Perch, Perca fluviatilis), and an ambush predator (dragonfly larvae). The tadpoles mean weight, maximum acceleration and velocity, mobility, boldness, and morphological changes in various Gosner stages were analyzed. My tests showed a significant difference in tadpole weight and their morphology, however, there were no differences in speed, acceleration, boldness or mobility. The morphometric analysis of the tadpoles showed a significant change of tadpoles in the perch treatment compared to the tadpoles in the control. The tadpoles in the perch treatment showed a higher TH/TL (tail height/tail length) ratio, and were overall heavier, than the tadpoles in the control, but no significant change compared to the tadpoles in the dragonfly treatment. This shows that the kairomones and alarm cues triggered a large morphological change, but the effect of the change requires more research.

Place, publisher, year, edition, pages
2017.
Keywords [en]
Rana temporaria, morphology, phenotypic plasticity, predator, induced defense
Keywords [sv]
Rana temporaria, morfologi, fenotypisk plasticitet, predator, inducerat försvar
National Category
Biological Systematics Ecology Evolutionary Biology Zoology Developmental Biology
Identifiers
URN: urn:nbn:se:umu:diva-164778OAI: oai:DiVA.org:umu-164778DiVA, id: diva2:1367107
Educational program
Bachelor of Science in Biology and Earthscience
Presentation
, Umeå
Supervisors
Examiners
Available from: 2019-11-12 Created: 2019-10-31 Last updated: 2019-11-12Bibliographically approved

Open Access in DiVA

fulltext(524 kB)2 downloads
File information
File name FULLTEXT01.pdfFile size 524 kBChecksum SHA-512
e40e4c24c95ebe7812d73710905d96083316a74acf1a1c928d82507cb6c75418d5668ff9c1e9610b26411b8dbe66f29aa7787317208b95d3722f669e3ee4cf6c
Type fulltextMimetype application/pdf

By organisation
Department of Ecology and Environmental Sciences
Biological SystematicsEcologyEvolutionary BiologyZoologyDevelopmental Biology

Search outside of DiVA

GoogleGoogle Scholar
Total: 2 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 37 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf