Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
Sexual dimorphism in bosmina: the role of morphology, drag and swimming.
University of Borås, School of Engineering.
2006 (English)In: Ecology, ISSN 0012-9658, Vol. 87, no 3, p. 788-795Article in journal (Refereed) Published
Abstract [en]

Some Bosmina water flea species develop morphological antipredatory defenses, such as long antennules and a high carapace, but in Bosmina (Eubosmina) coregoni gibbera these traits are larger and more variable in females than in males. Here we propose that this sexual dimorphism derives from differential costs of hydrodynamic drag and selection for mobility in males. We tested this hypothesis by estimating drag of several Bosmina morphologies by using scale models sinking in glycerin of different concentrations and viscosities. Body forms included males, sexual and asexual females of B. c. gibbera, and males and asexual females of Bosmina (Eubosmina) longispina, a taxon with less variable body shape. For a given body length or body volume, male models had lower drag than models of sexual and asexual females, suggesting that males can swim 14–28% faster with the same energy consumption. Consistent with this conclusion, video recordings showed that males of B. c. gibbera advanced 55–73% farther than females in each swimming stroke. We conclude that hydrodynamic drag may have significant implications for swimming and evolution of sexual dimorphism in water fleas, and we suggest that males lack the defensive structures of females of B. c. gibbera (e.g., high carapaces) because competition over mates favors low drag.

Place, publisher, year, edition, pages
2006. Vol. 87, no 3, p. 788-795
Keywords [sv]
Energi och material
National Category
Ecology
Identifiers
URN: urn:nbn:se:hb:diva-2312DOI: 10.1890/05-0082Local ID: 2320/2994OAI: oai:DiVA.org:hb-2312DiVA, id: diva2:870403
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2018-03-05Bibliographically approved

Open Access in DiVA

fulltext(335 kB)1 downloads
File information
File name FULLTEXT01.pdfFile size 335 kBChecksum SHA-512
e226154fab5ab8e0aaab0dd8c6cd3d3910d446d01cf43c5c0f12fb7d23a9b4bf43fe748c4e359e06bef237668feb916303b5a8fa7c1143fee210766799ec5af6
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Lundqvist, N.

Search in DiVA

By author/editor
Lundqvist, N.
By organisation
School of Engineering
Ecology

Search outside of DiVA

GoogleGoogle Scholar
Total: 1 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

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 198 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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