Study

Priming the larval pump: resurgence of bay scallop recruitment following initiation of intensive restoration efforts

  • Published source details Tettelbach S., Peterson B., Carroll J., Hughes S., Bonal D., Weinstock A., Europe J., Furman B. & Smith C. (2013) Priming the larval pump: resurgence of bay scallop recruitment following initiation of intensive restoration efforts. Marine Ecology Progress Series, 478, 153-172

Actions

This study is summarised as evidence for the following.

Action Category

Transplant/release captive-bred or hatchery-reared species - Transplant/release molluscs

Action Link
Subtidal Benthic Invertebrate Conservation
  1. Transplant/release captive-bred or hatchery-reared species - Transplant/release molluscs

    A replicated, before-and-after study in 2005–2010 of 23 sites across five areas of in Peconic Bays, North Atlantic Ocean, New York, USA (Tettelbach et al. 2013 - same expeimental set-up as Tettelbach et al. 2015) found that over four years after initiating transplantation of hatchery-reared bay scallop Argopecten irradians irradians, larval recruitment increased across all areas. Larval recruitment across all five areas was higher after restoration (2010: 29–118 spat/collector/day), compared to before (2005: 2–10 spat/collector/day), including two areas where no scallops had been transplanted, suggesting larval transport from restored sites to unrestored sites. A restoration programme aimed to increase scallop reproductive success was initiated in 2006 by transplanting several millions of hatchery-reared bay scallops in nets or directly on the seabed (100–200 scallops/m2; see paper for details). Larval recruitment was monitored at 23 sites across five embayments (three with transplanted scallops, two nearby without to assess larval transport) for 6 years: 2005–2006 (before intensive restoration) and 2007–2010 (after commencement of intensive restoration). Spat collectors were deployed (3/site) at 1–6 m average depth before 1st June to sample bay scallop larvae. A second set of collectors was deployed three weeks later. Every three weeks thereafter, a new set of collectors replaced those that had been in the water for six weeks. After retrieval, all scallops in the spat collectors were counted and shell heights were measured.

Output references

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