IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research


Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Reproductive biology of Lychnorhiza lucerna (Cnidaria: Scyphozoa: Rhizostomeae): Individual traits related to sexual reproduction
Schiariti, A.; Christiansen, E.; Morandini, A.C.; Da Silveira, F.L.; Giberto, D.A.; Mianzan, H.W. (2012). Reproductive biology of Lychnorhiza lucerna (Cnidaria: Scyphozoa: Rhizostomeae): Individual traits related to sexual reproduction. Mar. Biol. Res. 8(3): 255-264.
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000, more
Peer reviewed article  

Available in  Authors 

    Oogenesis; Sexual maturity; Spermatogenesis; Lychnorhiza lucerna Haeckel, 1880 [WoRMS]; ASW, South Atlantic [Marine Regions]; Marine
Author keywords
    Non-brooder species; oogenesis; sexual maturity; South-western Atlantic;spermatogenesis

Authors  Top 
  • Schiariti, A.
  • Christiansen, E.
  • Morandini, A.C.
  • Da Silveira, F.L.
  • Giberto, D.A., editor
  • Mianzan, H.W.

    We studied individual traits related to the sexual reproduction of Lychnorhiza lucerna and reviewed earlier studies of sexual maturation in scyphomedusae, focusing on non-brooding species. Lychnorhiza lucerna is a gonochoric species and sexual dimorphism was noted in the gonadal colour. There were no brooding structures or any other distinguishable features enabling macroscopic determination of sex. Gametogenesis resembled descriptions available for other rhizostomes and semaeostomes. Both processes are asynchronous, with gametes at all stages of development occurring together. Oocytes arose from the gastrodermis and maintained contact with it via trophocytes throughout vitellogenesis. Spermatogenesis occurred within spermatic follicles arising from nested primary spermatogonia. Population features of sexual reproduction were defined by characterizing and quantifying individuals at different stages of sexual maturity. In Scyphozoa, sexually mature medusae can be detected by (1) the presence of fully developed gametes in the gonads indicating incipient spawning, or (2) the presence of spent follicles as evidence of ongoing or recent spawning. Whereas the former allows more detailed study of sexual reproductive patterns of any species, the latter constitutes an option for non-brooders (as in L. lucerna) equivalent to the search of fertilized eggs or planulae for brooder species.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors