Spillover of sea scallops from rotational closures in the Mid-Atlantic Bight (United States)

Author:

Hart Deborah R1ORCID,Munroe Daphne M23,Caracappa Joseph C23,Haidvogel Dale3,Shank Burton V1,Rudders David B4,Klinck John M5,Hofmann Eileen E5,Powell Eric N6

Affiliation:

1. National Oceanic and Atmospheric Administration Northeast Fisheries Science Center, 166 Water St., Woods Hole, MA, USA

2. Haskin Shellfish Research Laboratory, Rutgers University, Port Norris, NJ, USA

3. Department of Marine and Coastal Science, Rutgers University, New Brunswick, NJ, USA

4. Department of Fisheries Science, Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA 23062, USA

5. Center for Coastal Physical Oceanography, Old Dominion University, Norfolk, VA, USA

6. Department of Coastal Sciences, Gulf Coast Research Laboratory, The University of Southern Mississippi, Ocean Springs, MS, USA

Abstract

Abstract We examined evidence for larval spillover (increased recruitment outside the closures) of Atlantic sea scallops (Placopecten magellanicus) due to rotational closures in the Mid-Atlantic Bight using a 40-year fisheries survey time series and a larval transport model. Since the first closure of the Hudson Canyon South (HCS) area in 1998, mean recruitment in the two areas directly down-current from this closure, Elephant Trunk (ET) and Delmarva (DMV), increased significantly by factors of about 7 and 2, respectively. Stock–recruit plots indicate that low biomasses in HCS were associated with reduced mean recruitment in ET and DMV. Simulations indicate that larvae spawned in HCS often settle in the two downstream areas and that model-estimated settlement (based on gonad biomass in HCS and year-specific larval transport between the areas) is correlated with observed recruitment. This study gives strong evidence that the rotational closure of HCS has induced increased recruitment in down-current areas.

Funder

NOAA Fisheries and the Environment

FATE

NOAA/CINAR

USDA National Institute of Food and Agriculture Hatch project

New Jersey Agricultural Experiment Station

Publisher

Oxford University Press (OUP)

Subject

Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics,Oceanography

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