Change search
ReferencesLink to record
Permanent link

Direct link
Androgens Increase Iws Opsin Expression and Red Sensitivity in Male Three-Spined Sticklebacks
Stockholm University, Faculty of Science, Department of Zoology. Acad Sinica, Marine Research Station, Taiwan.
Show others and affiliations
2014 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 9, no 6, e100330- p.Article in journal (Refereed) Published
Abstract [en]

Optomotor studies have shown that three-spined sticklebacks (Gasterosteus aculeatus) are more sensitive to red during summer than winter, which may be related to the need to detect the red breeding colour of males. This study aimed to determine whether this change of red light sensitivity is specifically related to reproductive physiology. The mRNA levels of opsin genes were examined in the retinae of sexually mature and immature fish, as well as in sham-operated males, castrated control males, or castrated males implanted with androgen 11-ketoandrostenedione (11 KA), maintained under stimulatory (L16:D8) or inhibitory (L8:D16) photoperiods. In both sexes, red-sensitive opsin gene (Iws) mRNA levels were higher in sexually mature than in immature fish. Under L16:D8, lws mRNA levels were higher in intact than in castrated males, and were up-regulated by 11 KA treatment in castrated males. Moreover, electroretinogram data confirmed that sexual maturation resulted in higher relative red spectral sensitivity. Mature males under L16:D8 were more sensitive to red light than males under L8:D16. Red light sensitivity under L16:D8 was diminished by castration, but increased by 11 KA treatment. Thus, in sexually mature male sticklebacks, androgen is a key factor in enhancing sensitivity to red light via regulation of opsin gene expression. This is the first study to demonstrate that sex hormones can regulate spectral vision sensitivity.

Place, publisher, year, edition, pages
2014. Vol. 9, no 6, e100330- p.
National Category
URN: urn:nbn:se:su:diva-106592DOI: 10.1371/journal.pone.0100330ISI: 000338709500040OAI: diva2:737835


Available from: 2014-08-14 Created: 2014-08-12 Last updated: 2014-10-13Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Borg, Bertil
By organisation
Department of Zoology
In the same journal

Search outside of DiVA

GoogleGoogle Scholar
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

Altmetric score

Total: 65 hits
ReferencesLink to record
Permanent link

Direct link