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.

中文翻译：

---

大西洋中部海岸线旋转封闭造成的海扇贝溢出（美国）

我们检查了大西洋扇贝（Placopecten magellanicus）的幼虫外溢证据（在封闭处外增加招募））是由于大西洋中部地区采用40年渔业调查时间序列和幼体运输模型进行的轮流封闭。自1998年哈德逊峡谷以南地区（HCS）首次关闭以来，从该关闭处直接下游的两个地区的平均招募，即象鼻（ET）和德尔玛（DMV）分别增加了约7倍和2倍。 ， 分别。种群招聘图表明，HCS中低生物量与ET和DMV的平均募集减少有关。模拟表明，HCS中产卵的幼虫通常在两个下游区域定居，模型估计的定居（基于HCS中的性腺生物量和各区域之间特定年份的幼虫运输）与观察到的募集相关。