THE REPRODUCTIVE-BIOLOGY OF TRICNIDACTIS ERRANS (ACTINIARIA, HALIPLANELLIDAE) FROM ROCKY SHORE OF MAR-DEL-PLATA (ARGENTINA)

Authors
EXCOFFON AC ZAMPONI MO
Citation
Ac. Excoffon et Mo. Zamponi, THE REPRODUCTIVE-BIOLOGY OF TRICNIDACTIS ERRANS (ACTINIARIA, HALIPLANELLIDAE) FROM ROCKY SHORE OF MAR-DEL-PLATA (ARGENTINA), Cahiers de biologie marine, 36(3), 1995, pp. 175-179
Citations number
26
Categorie Soggetti
Marine & Freshwater Biology
Journal title
Cahiers de biologie marine → ACNP
ISSN journal
00079723
Volume
36
Issue
3
Year of publication
1995
Pages
175 - 179
Database
ISI
SICI code
0007-9723(1995)36:3<175:TROTE(>2.0.ZU;2-5
Abstract
Tricnidactis errans from Mar del Plata propagates asexually by pedal l aceration. Dynamics of asexual propagation was evaluated. Frequency of laceration and number of lacerates per individual showed a correlatio n with seasonal changes in mean seawater temperature; the highest rate of fragmentation was observed after the maximum water temperature (Fe bruary-March). T. errans exhibited a clear annual cycle of gametogenes is, but sterile and almost exclusively female specimens were found. Bo th of them propagate asexually by pedal laceration, producing a simila r number of fragments. Asexual reproduction by pedal laceration appear s to be the sole mean of propagation in the examined aggregation.