Oocyte development and maturity classification of Gerlachea australis from the Weddell Sea, Antarctica

Silvina Van Der Molen, Jesús Matallanas

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11 Citations (Scopus)

Abstract

Gonad structure and oogenesis were studied in the bathydraconiid species Gerlachea australis, in order to determine whether reproduction represents any meaningful adaptation feature in this Antarctic species. All studied specimens came from Halley Bay, Weddell Sea. This species shows a cystovarian-type ovary, and the oocytes' developmental dynamics allow classification as a group synchronic ovary. The different events of oogenesis were grouped into seven stages, each one showing distinctive features. After the analyses of the frequency distributions of the oocytes in the different stages, three ovarian maturing stages were characterised. Spawning probably takes place during the austral summer and the eggs are released during a short period. The features of oogenesis and ovarian maturation in G. australis are similar to those described for other teleosts.
Original languageEnglish
Pages (from-to)653-658
JournalPolar Biology
Volume26
DOIs
Publication statusPublished - 1 Oct 2003

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