La diatomee Navicula ostrearia Bory en baie de Bourgneuf

• Main Author: Robert, Jean-michel
• Format: Article in Journal/Newspaper
• Language: French
• Published: ISTPM 1973
• Subjects: North east Atlantic; France; Oyster pond; Microscopic observation; Polymorphomism; Diatom; Bory; North East Atlantic
• Online Access: https://archimer.ifremer.fr/doc/1973/publication-2148.pdf; https://archimer.ifremer.fr/doc/00000/2148/

Previously, Navicula ostrearia B. has been described only from the Marennes-Oleron district of the Atlantic coast of France. However, this pennate diatom is also present In the Bay of Bourgneuf where breeding of green-gilled oysters were recognized in sea basins called oyster ponds. A short description of observations made with the optical microscope precedes description of high magnification examination of the frustule made with the scanning electron microscope. This combination of techniques shows a polymorphism between the external and internal surfaces of diatom valves.