Layer: Sea Scallops 2016-2018 Potential Reproductive Output (ID: 89)

Name: Sea Scallops 2016-2018 Potential Reproductive Output

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Description: This layer shows the results of a drop camera survey to estimate the number and size of Atlantic sea scallops (Placopecten magellanicus) over 70,000 km^2 of the continental shelf, an area that nearly covers the entire range of this species. The survey was conducted from May to October in 2017, with additional areas surveyed in 2016 and 2018. In total, 22,592 quadrat samples were collected at 5648 stations. The productivity of sampled areas was ranked by the presence or absence of scallops observed in each quadrat image: 0 scallops for low productivity, 1–2 scallops for medium productivity, and 3 or more scallops for high productivity. This sampling represents a snapshot in time; over the 20-year time-series of the US resource, areas that at one time did not have scallops could potentially support high densities at a later date if a recruitment event were to occur. From these surveys, researchers estimated that there were 34 billion individual scallops (95% confidence limits: 22–46 billion) within the species’ range.

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Copyright Text: Stokesbury and Bethoney, 2020; Frontiers in Ecology and Environment 18(9):513–519, doi:10.1002/fee.2244

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