Eight-year Record of Hemigrapsus sanguineus (Asian Shore Crab) Invasion in Western Long Island Sound Estuary
Eight-year Record of Hemigrapsus sanguineus (Asian Shore Crab) Invasion in Western Long Island Sound Estuary
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西长岛海峡河口 Hemigrapsus sanguineus（亚洲岸蟹）入侵的八年记录
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Jeff L. Main
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文献类型：
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作者：
G. Kraemer;M. Sellberg;Alon Gordon;Jeff L. Main
亚洲岸蟹（Hemigrapsus sanguineus）于1994年首次抵达美国纽约黑麦。1998-2005年对海地的红蟹（H. sanguineus）、绿蟹（Carcinus maenas）、本土蟹（Eurypanopeus depressus）、大西洋岩蟹（Cancer irroratus）和蜘蛛蟹（Libinia emarginata）的潮间带丰度进行了调查。亚洲岸蟹密度（6月估计）从1998-2001年增加到约120只螃蟹m - 2，然后从2002-2005年下降到80只螃蟹m - 2。扁背泥蟹的数量减少了约95%。大西洋岩蟹、绿蟹和蜘蛛蟹的数量也可能有所减少，尽管这些物种在研究开始时并不常见。滨蟹（Littorina littorea）潮间带低密度下降约80%，与亚洲滨蟹种群的扩大一致。6月，小型亚洲岸蟹在潮间带上游的数量远多于大型蟹在潮间带下游的数量。1月份潮间带种群以小型亚洲岸蟹为主，这些蟹仅限于潮间带的下半部分。
Abstract Hemigrapsus sanguineus (Asian shore crab) first arrived at Rye, NY in 1994. The intertidal abundances of H. sanguineus, Carcinus maenas (green crab), and the native crabs Eurypanopeus depressus (flatback mud crab), Cancer irroratus (Atlantic rock crab), and Libinia emarginata (spider crab) were censused from 1998–2005. Asian shore crab densities (estimated in June) increased from 1998–2001 to ca. 120 crabs m−2, and then declined to 80 crabs m−2 from 2002–2005. The flatback mud crab declined in abundance by about 95%. Decreases in the abundances of Atlantic rock crabs, green crabs, and spider crabsmay also have occurred, though these species were uncommon at the outset of the study. The lower intertidal density of the gastropod Littorina littorea (common periwinkle) decreased by about 80%, and the decline was coincident with the expansion of the Asian shore crab population. In June, small Asian shore crabs were disproportionately more abundant in the upper intertidal zone compared with lower zones, where large crabs were more abundant. January intertidal populations were dominated by small Asian shore crabs, and these were restricted to the lower half of the intertidal zone.