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Spawning and development of Calliostoma granulatum in the Mediterranean Sea

Published online by Cambridge University Press:  11 May 2009

Montserrat Ramón
Montserrat Ramón
Affiliation:
Instituto de Ciencias del Mar, Paseo Nacional s/n, 08003 Barcelona, Spain
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Abstract

The spawning, larval development, and postlarval characteristics of Calliostoma granulatum have been described and illustrated from laboratory observations. Spawning in this species does not follow a seasonal pattern, since adult specimens caught at all times of the year released viable gametes after two or three days in tanks. Eggs had a mean diameter of 341 μm and were surrounded by a mucous sheath by which they were agglutinated into ribbons of variable length that formed amorphous clumps on the bottom of the tanks. The veliger larval stage was short (two days) and took place inside the egg membrane. Development was direct, and at 18–19°C juveniles emerged as crawling young four days after fertilization. Larval and postlarval shells were studied with the aid of a scanning electron microscope.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 70 , Issue 2 , May 1990 , pp. 321 - 328
Copyright
Copyright © Marine Biological Association of the United Kingdom 1990

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