Original paper
Morphologische Untersuchungen an den Gonaden von Fischen aus einem alpinen See (Königssee) im Jahreszyklus
[Studies of gonad morphology of fishes in an alpine lake (Königssee) over a year]
Hoffmann, R.; Meder, D.
Archiv für Hydrobiologie Volume 113 Number 1 (1988), p. 61 - 91
26 references
published: Jul 19, 1988
DOI: 10.1127/archiv-hydrobiol/113/1989/61
ArtNo. ESP141011301004, Price: 29.00 €
Abstract
The seasonal cycles of gonads of arctic charr (Salvelinus alpinus L.), whitefish (Coregonus macrophthalmus Nüsslin, 1882), pike (Esox lucius L.), minnow (Phoxinus phoxinus L.), perch (Perca fluviatilis L.) and burbot (Lota lota L.) were studied regarding length and weight of fish and gonads, and macroscopical and histological appearance. There were four stages differentiable by histological criteria: I stage of rest, II stage of development, III stage of maturity, IV stage of post-spawning. The basal testicular structur is characterized by irregularly distributed tubules in charr, whitefish, pike and minnow showing totally separated gonads resp. radial-symmetrically arranged tubules in perch and burbot having connected caudal parts of gonads. An oviduct does not occur in charr and whitefish. It offsprings in the ovary in pike and minnow whereas in perch and burbot oviduct is extraovarial. Hermaphrodites were found in pike, whitefish and burbot.
Keywords
whitefish • Hermaphrodites • Königssee