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Génétique des populations de Sphaeroma serratum (F.). 18. Étude des populations des côtes du Morbihan et de Loire Atlantique entre Lorient et l'embouchure de la Loire = Population genetics of Sphaeroma serratum (F.). 18. Study of the natural populations of the Morbihan and Loire-Atlantique coasts between Lorient and the Loire Estuary
Lejuez, R. (1988). Génétique des populations de Sphaeroma serratum (F.). 18. Étude des populations des côtes du Morbihan et de Loire Atlantique entre Lorient et l'embouchure de la Loire = Population genetics of Sphaeroma serratum (F.). 18. Study of the natural populations of the Morbihan and Loire-Atlantique coasts between Lorient and the Loire Estuary. Cah. Biol. Mar. 29(1): 51-75
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
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    Marine

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  • Lejuez, R.

Abstract
    During the summers from 1976 to 1979, the prospections of Sphaeroma serratum natural populations, on the Breton coast from Lorient to Saint-Nazaire, enabled the counting of 77 stations where 105,500 individuals were collected on a part of coast about 210 km long. While corroborating the genetic complexity of local populations, the analysis of the results prove some important particularities: except on the Wild Coast of Quiberon peninsula where they are particularly numerous, albicans are slightly represented; discretum , very numerous, are prevailing by the rocky capes (Sarzeau, Saint-Jacques, Penlan, Penestin, Pen Be, Le Croisic); lunulatum and ornatum mutants, for which correlations in the distribution of frequencies were pointed out, are well represented; signatum and rubrum , for which some correlation in the distribution of frequencies is also stated, are numerous in sheltered stations (baie de Quiberon, golfe du Morbihan, baie de Pouliguen).

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