• norsk
    • English
  • English 
    • norsk
    • English
  • Login
View Item 
  •   Home
  • Havforskningsinstituttet
  • Research Programmes
  • The Aquaculture Programme
  • View Item
  •   Home
  • Havforskningsinstituttet
  • Research Programmes
  • The Aquaculture Programme
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

The reproductive cycle of female Ballan wrasse Labrus bergylta in high latitude, temperate waters

Muncaster, S.; Andersson, Eva; Kjesbu, Olav Sigurd; Taranger, Geir Lasse; Skiftesvik, Anne Berit; Norberg, Birgitta
Journal article, Peer reviewed
Thumbnail
View/Open
j.1095-8649.2010.02691.x.pdf (953.1Kb)
URI
http://hdl.handle.net/11250/117047
Date
2010-08
Metadata
Show full item record
Collections
  • The Aquaculture Programme [21]
Original version
Journal of Fish Biology, 77 (3), 2010: 494-511   http://dx.doi.org/10.1111/j.1095-8649.2010.02691.x
Abstract
This 2 year study examined the reproductive cycle of wild female Ballan wrasse Labrus bergylta in western Norway as a precursor to captive breeding trials. Light microscopy of ovarian histology was used to stage gonad maturity and enzyme-linked immuno-absorbent assay (ELISA) to measure plasma concentrations of the sex steroids testosterone (T) and 17β-oestradiol (E2). Ovarian recrudescence began in late autumn to early winter with the growth of previtellogenic oocytes and the formation of cortical alveoli. Vitellogenic oocytes developed from January to June and ovaries containing postovulatory follicles (POF) were present between May and June. These POF occurred simultaneously among other late maturity stage oocytes. Plasma steroid concentration and organo-somatic indices increased over winter and spring. Maximal (mean ±s.e.) values of plasma T (0·95 ± 0·26 ng ml−1), E2 (1·75 ± 0·43 ng ml−1) and gonado-somatic index (IG; 10·71 ± 0·81) occurred in April and May and decreased greatly in July when only postspawned fish with atretic ovaries occurred. Evidence indicates that L. bergylta are group-synchronous multiple spawners with spawning occurring in spring and peaking in May. A short resting period may occur between late summer and autumn when previtellogenic oocytes predominate and steroid levels are minimal.
Description
Article published in Journal of fish biology, 77 (3): 494-511 AUG 2010
Publisher
Blackwell

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit
 

 

Browse

ArchiveCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsDocument TypesJournalsThis CollectionBy Issue DateAuthorsTitlesSubjectsDocument TypesJournals

My Account

Login

Statistics

View Usage Statistics

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit