La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Post-settlement alteration of spatial patterns of soft shell clam (Mya arenaria) recruits
Auteurs :	H. L. Hunt, Auteur ; D. A. McLean, Auteur ; L. S. Mullineaux, Auteur
Type de document :	Article
Dans :	Estuaries (26(1) FEB 2003)
Article en page(s) :	72-81
Résumé :	To examine the roles of settlement and early post-settlement processes in patterns of recruitment of the soft shell clam Mya arenaria, abundance of juvenile Mya at three intertidal sites in Barnstable Harbor, Massachusetts, was monitored over two settlement seasons. Two peaks of settlement occurred in 1998 (July and September) and one peak was recorded in June 1999, indicating that a late season settlement event is not a consistent feature at this site. Abundance of recent settlers (i.e., early recruits, 3-mm shell length at the end of the settlement season (up to 60 m(-2)) indicated large losses of individuals during the early post-settlement period. This study demonstrates that spatial patterns in Mya abundance can change substantially during the early post-settlement period, and that high mortality rates can result in cohorts contributing little to the population size even when rates of settlement are high.

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