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
Individuell tillväxt och substratval hos en lokalt differentierad population av Asellus aquaticus
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
2013 (Swedish)Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
Abstract [en]

Local differentiation may occur during a short period of time and is part of the formation of new species. The isopod Asellus aquaticus is an example of a species in which local adaptation has occurred during a short period of time. An establishment of stonewort (Chara spp.) vegetation in Lake Tåkern (in the 2000) resulted in two different Asellus ecotypes; a lighter pigmented, smaller one that lives among stoneworts grazing periphytic algae, and a darker, larger ecotype that feeds on decaying leaves in reed (Phragmites australis vegetation. The purpose of this study was to examine whether there are differences in growth between ecotypes, depending on whether the food was periphytic algae or leaves, and to study the choice of substrates between the two food types. For the study, animals from both habitats were brought in from Lake Tåkern to the laboratory. I found that both the reed and the stonewort animals grew better when feeding on periphytic algae than on leaves, but that there was no difference in weight gain between the two ecotypes. There was no indication that the animals preferred any of the substrates. Results suggest that despite earlier noted differences in behavior, size and pigmentation (which differentiation had brought), there is no evidence that Asellus aquaticus has adapted to feed on plant matter prevailing in their original habitat. The animals grew better when the food was algae maybe due to that the algae, as previous studies show, are easier assimilated, whereas Asellus has to eat a larger amount of leaves to reach the same energy intake.

Place, publisher, year, edition, pages
2013. , 13 p.
Keyword [en]
Asellus aqatius, adaption, behavior, differentiation, growth, substrate choice.
National Category
Biological Sciences Ecology
Identifiers
URN: urn:nbn:se:liu:diva-96963ISRN: LiTH-IFM- Ex--13/2813--SEOAI: oai:DiVA.org:liu-96963DiVA: diva2:644801
Subject / course
Biology
Supervisors
Examiners
Available from: 2013-09-03 Created: 2013-09-02 Last updated: 2013-09-03Bibliographically approved

Open Access in DiVA

Examensarbete Biologi Felicia Alriksson(555 kB)125 downloads
File information
File name FULLTEXT01.pdfFile size 555 kBChecksum SHA-512
93fe88ee8a02ca9ccb5df54927bd7a4a7b1eae5065e22a3d4c5d619a125c5f3b040ee1c280120082850916cb46d58b63ab1d4f204375d2e0662234e8fa607364
Type fulltextMimetype application/pdf

By organisation
Department of Physics, Chemistry and BiologyThe Institute of Technology
Biological SciencesEcology

Search outside of DiVA

GoogleGoogle Scholar
Total: 125 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: 113 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