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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on June 23, 2009
ICES Journal of Marine Science: Journal du Conseil 2009 66(10):2155-2164; doi:10.1093/icesjms/fsp175
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© 2009 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Dispersal and settlement of sea scallop larvae spawned in the fishery closed areas on Georges Bank

Rucheng C. Tian1, Changsheng Chen1,2, Kevin D. E. Stokesbury1, Brian J. Rothschild1, Geoffrey W. Cowles1, Qichun Xu1, Song Hu1,2, Bradley P. Harris1 and Michael C. Marino, II1

1 Department of Fisheries Oceanography, School for Marine Science and Technology, University of Massachusetts Dartmouth, 706 South Rodney French Boulevard, New Bedford, MA 02744, USA
2 Marine Ecosystem and Environmental Laboratory, Shanghai Ocean University, 999 Hucheng Huan Road, 201306 Shanghai, China

Correspondence to R. C. Tian: tel: +1 508 910 6310; fax: +1 508 910 6371; e-mail: rtian{at}umassd.edu

Tian, R. C., Chen, C., Stokesbury, K. D. E., Rothschild, B. J., Cowles, G. W., Xu, Q., Hu, S., Harris, B. P., and Marino II, M. C. 2009. Dispersal and settlement of sea scallop larvae spawned in the fishery closed areas on Georges Bank. – ICES Journal of Marine Science, 66: 2155–2164.

Three fishery closed areas in the Georges Bank (GB) region were implemented in 1994 to protect depleted groundfish stocks for population replenishment. However, the drift and ultimate destination of larvae spawned in the closed areas have not been analysed specifically within the framework of ocean currents. To assess the efficiency of the closed areas as population replenishment sources, we conducted a simulation-based analysis on the dispersal and settlement of sea scallop larvae spawned in the closed areas from 1995 to 2005 using circulation fields computed by the Finite-Volume Coastal Ocean Model, scallop survey data, and a population dynamics model. Closed area I located in the Great Southern Channel (GSC) had a persistently high rate of larval retention (86% on average). For closed area II located on eastern GB, a considerable quantity of larvae was dispersed out of the domain. For the Nantucket Lightship Closed Area located on Nantucket Shoals, larvae consistently drifted away from the region during the 11 years simulated. Our simulation revealed three high-retention regions that are the most suitable for closed-area selection and rotational fishery management in terms of larval supply to the GB–GSC region.

Keywords: fishery closed area, Georges Bank, Lagrangian simulation, larval dispersal, sea scallop

Received 4 November 2008; accepted 10 May 2009; advance access publication 23 June 2009.


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