Encapsulated development of the marine gastropod Tonna galea (Linnaeus, 1758) in captivity

TitleEncapsulated development of the marine gastropod Tonna galea (Linnaeus, 1758) in captivity
Publication TypeJournal Article
Year of Publication2011
AuthorsDoxa, CK, Sterioti A, Kentouri M, Divanach P
JournalJournal of Biological Research
Pages304 - 307
KeywordsEncapsulated development, Reproduction, Tonna galea

In the present study the reproductive biology of Tonna galea (Linnaeus, 1758) was studied for the first time. In mid-September 2006 one individual was found laying a pale pink egg rosette of 39.5 cm length. Number of embryos, stages of development, shape and dimensions were studied in relation to time and measured on microphotographs of randomly sampled capsules. Each oval or spherical shaped capsule of 3.61 mm total length contained 101 developing embryos. The embryo diameter ranged from 297.5 μm of the unsegmented egg to 489 μm of the free veliger. At 21°C eclosion occurred 34 days after capsule deposition, at a free-swimming veliger stage. The duration of each developmental stage, from one cell to veliger, is reported. Results are discussed in relation to possible culture and use for ecological purposes.


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