Cookies Policy
X
Cookie Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

11-ketotestosterone is not responsible for the entire testicular effect on male reproductive behaviour in the threespine stickleback

MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Buy this article

Price:
$30.00+ Tax (if applicable)
Add to Favorites

The reproductive behaviour in the male threespine stickleback, Gasterosteus aculeatus is under androgenic control, in which 11-ketotestosterone (11KT) is the most important androgen. Previous studies have shown that castration removes reproductive behaviour, whereas treatment with 11-ketoandrostenedione (11KA), which is converted to 11KT extra-testicularily, restores all aspects of it, at least qualitatively. In this study, we investigated whether 11KT and/or testosterone (T) could restore the full magnitude of some of the more pronounced reproductive behaviours, including gluing (nest-building behaviour), zig-zagging (courtship behaviour) and displacement fanning in castrated male sticklebacks. Non-breeding males were castrated and implanted with either an empty Silastic capsule (castrated control), or a capsule containing 11KA, T or a combination of both capsules. Sham-operated males also received an empty capsule. While castrated males showed low or non-detectable plasma levels of both T and 11KT, castrated males given T or 11KA implants showed elevated levels of T and 11KT respectively, levels being within the physiological range found in intact nest-building males. Castrated males given both implants showed elevated levels of both T and 11KT. While all sham-operated males actively displayed all reproductive behaviours, these behaviours were either completely abolished or greatly reduced by castration. 11KA treated fish displayed more zig-zags and fanning than castrated fish, and unlike castrated males, built nests. Overall, 11KA or 11KA + T were more effective than T in restoring the expression of reproductive behaviours in castrated males. However, sham-operated fish displayed more gluing compared to 11KA, T and 11KA + T treated fish, and more fanning than 11KA or T treated fish. Our results indicate that 11KT and/or T cannot mediate the entire testicular effect on reproductive behaviours in the male stickleback and suggest that other testicular hormones also play a role.

Affiliations: 1: Department of Zoology, Stockholm University, S-106 91 Stockholm, Sweden; 2: Department of Biology, University of Bergen, N-5020 Bergen, Norway

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Create email alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Name:*
    Email:*
    Your details
    Name:*
    Email:*
    Department:*
    Why are you recommending this title?
    Select reason:
     
     
     
     
    Other:
     
    Behaviour — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation