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

Silvina Van Der Molen; Jesús Matallanas

doi:https://doi.org/10.1007/s00300-003-0542-8

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

Silvina Van Der Molen, Jesús Matallanas

Department of Animal Biology, Plant Biology and Ecology

Research output: Contribution to journal › Article › Research › peer-review

10 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 language	English
Pages (from-to)	653-658
Journal	Polar Biology
Volume	26
DOIs	https://doi.org/10.1007/s00300-003-0542-8
Publication status	Published - 1 Oct 2003

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

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.",

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AB - 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.

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SN - 0722-4060

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