In the evolution of ascidians different reproductive strategies operated. One of the most important aspects was the passage from external to internaI fertilization and then from ovipaIity to ovovivipaIity and viviparity with consequent morpho-functional modifications to organs and gametes. This paper presents a short review on the ovary and oviduct, the plasticity of which had pIayed a cri tic role in permitting the evolutive changes of sexual reproduction.

Sexual reproduction in ascidians: comparative aspects of oviduct, ovulation and spawning

ZANIOLO, GIOVANNA;MANNI, LUCIA;BURIGHEL, PAOLO
1994

Abstract

In the evolution of ascidians different reproductive strategies operated. One of the most important aspects was the passage from external to internaI fertilization and then from ovipaIity to ovovivipaIity and viviparity with consequent morpho-functional modifications to organs and gametes. This paper presents a short review on the ovary and oviduct, the plasticity of which had pIayed a cri tic role in permitting the evolutive changes of sexual reproduction.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/2471895
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