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首页> 外文期刊>Journal of Shellfish Research >DIFFERENTIAL RESPONSE OF THE AMERICAN LOBSTER HOMARUS AMERICANUS TO THE INVASIVE ASIAN SHORE CRAB HEMIGRAPSUS SANGUINEUS AND GREEN CRAB CARCINUS MAENAS
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DIFFERENTIAL RESPONSE OF THE AMERICAN LOBSTER HOMARUS AMERICANUS TO THE INVASIVE ASIAN SHORE CRAB HEMIGRAPSUS SANGUINEUS AND GREEN CRAB CARCINUS MAENAS

机译：美国龙虾大螯虾对入侵的亚洲蟹半边虾SANGUINEUS和绿色蟹大螯虾的差异反应

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摘要

The American lobster Homarus americanus shares rocky shore habitats and resources with two common invasive crab species in the northwest Atlantic: the green crab Carcinus maenas and the Asian shore crab Hemigrapsus sanguineus. Juvenile or early benthic phase (EBP) lobsters live under the same boulders as these crabs and are potentially vulnerable to crab predation and competition. Time-lapse photography was used to quantify aggressive interactions between EBP lobsters and invasive crabs in the laboratory. Lobsters behaved far more aggressively toward Asian shore crabs (initiating 11.8 attacks/h) than green crabs (4.9 attacks/h). Crab behavior varied widely as well, as green crabs were five times more likely to attack EBP lobsters than were Asian shore crabs. Thus, lobsters initiated 75.5% of aggressive interactions with Asian shore crabs, compared with only 22.3% with green crabs. Invasion history was a possible reason for this disparity, as green crabs have shared geographic range with American lobsters for more than 100 y, compared with only more than 10 y for Asian shore crabs. Differences in lobster responses to the two crab species suggest that aggressive behavior is the default for EBP lobsters and that they attacked the novel species (H. sanguineus) because they had not developed avoidance behavior to the potential crab threat. Green crabs posed more of a predation threat than Asian shore crabs, consuming over 80% of lobsters in 24-h trials. These results suggest that invasion history and predator-prey adaptation may shape the behavior and ecological interactions of native and invasive species.
机译：美国龙虾美洲大螯虾（Homarus americanus）与大西洋西北部的两种常见入侵蟹种共享多岩石的海岸生境和资源：绿色蟹Carcinus maenas和亚洲海岸蟹Hemigrapsus sanguineus。幼年或底栖初期（EBP）龙虾与这些螃蟹生活在同一块巨石下，因此可能容易受到螃蟹的捕食和竞争。延时摄影被用于量化实验室中EBP龙虾和侵入性螃蟹之间的侵略性相互作用。龙虾对亚洲岸蟹的行为（每小时发起11.8次攻击）要比青蟹（4.9次攻击/小时）更具攻击性。螃蟹的行为也大不相同，因为绿色螃蟹攻击EBP龙虾的可能性是亚洲沿海螃蟹的五倍。因此，龙虾开始与亚洲岸蟹进行侵略性互动的比例为75.5％，而绿蟹仅为22.3％。入侵历史可能是造成这种差异的原因，因为青蟹与美国龙虾的地理范围已超过100年，而亚洲岸蟹仅超过10年。对这两种蟹的龙虾反应差异表明，侵略性行为是EBP龙虾的默认行为，它们攻击新颖的物种（H. sanguineus）是因为它们没有针对潜在的蟹威胁开发回避行为。与亚洲沿海螃蟹相比，绿色螃蟹构成了更大的捕食威胁，在24小时试验中，绿色螃蟹消耗了80％以上的龙虾。这些结果表明入侵历史和捕食者-猎物的适应可能会影响本地和入侵物种的行为和生态相互作用。

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