VARIABILITÉ ANNUELLE DU RECRUTEMENT ET ÉVALUATION DES BESOINS EN NOMBRE DE CAPTURES D'UNE PÊCHERIE LITTORALE DE HOMARD HOMARUS GAMMARUS EN BRETAGNE (ILE D'HOUAT) (1973,1974,1975,1977,1978)

-i%rough the log-books offishermen an estimation of the annual variability of recruitment (by annualJirst commercial size-class strengh) in a coastal lobsterfishery has been realized forflve fishingseason (1973 to 1978). For this feature, year 1975 appears as an exceptionnal lobster season for the wholefishery along Brittany Coast, considering the apparent abundance of the recruits. The sharing out of the catches in commercial size-groups for this smallfishery allows to estimate the minimal nurnber of surplus-recruits (roughly one thousand 4 years old by year) to beproduced by the juvenile (stage IV and V) lobster hatchery operating in the analj~zedfishery area. i%is minimum level, if the hatchery impact has to be assessed from surplus commercial catches by this littleyeet of nearby 20 crabs and lobsters fishing bouts, approximates one thousand 4 years-age recruits trapped during first fishing season.