FN Archimer Export Format PT J TI La diatomee Navicula ostrearia Bory en baie de Bourgneuf OT The diatom Navicula ostrearia Bory in the Bay of Bourgneuf BT AF ROBERT, Jean-Michel AS 1:; FF 1:; TC 0 UR https://archimer.ifremer.fr/doc/1973/publication-2148.pdf LA French DT Article DE ;North east Atlantic;France;Oyster pond;Microscopic observation;Polymorphomism;Diatom AB 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. PY 1973 PD SEP SO Revue des Travaux de l'Institut des PĂȘches Maritimes SN 0035-2276 PU ISTPM VL 37 IS 3 BP 363 EP 368 ID 2148 ER EF