Large-scale, Manipulative Field Tests using Cultured and Wild Juveniles of the Soft-Shell Clam, Mya arenaria L.: Interactive Effects of Intertidal Location Predator Exclusion Netting, Netting Aperture Size, and Planting Area on Clam Growth and Survival within the Hampton-Seabrook Estuary. A Final Report to The New Hampshire Estuaries Project

摘要

A series of field experiments was conducted at two intertidal sites in the Hampton-Seabrook Estuary from November 2004-2006 to assess the efficacy of enhancing intertidal areas with cultured clam (Mya arenaria L.) seed (mean shell length (SL) = 7-10 mm). Measurement variables in each experiment included survival and growth of both cultured and wild seed clams. The first of three trials (November 2004-May 2005) examined the interactive effects of size of planting area (4 m2, 8 m2, 12 m2, and 18 m2) and predator deterrent netting (none, 4.2 mm, and 6.4 mm aperture (flexible, plastic netting)) at the Willows Flat in the Hampton River. The second trial (June-October 2005) examined the effect of predator deterrent netting at two discrete intertidal locations at the Willows Flat. The third trial (April-November 2006) replicated trial two except at two intertidal sites within the estuary approximately 3 km apart.