• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Predator-prey dynamics between recently established stone crabs (Menippe spp.)and oyster prey (Crassostrea virginica)
【24h】

Predator-prey dynamics between recently established stone crabs (Menippe spp.)and oyster prey (Crassostrea virginica)

机译：最近建立的石蟹（Menippe spp。）和牡蛎猎物（Crassostrea virginica）之间的捕食者-猎物动态。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Range expansion and population establishment of individual species can have significant impacts on previously established food webs and predator-prey dynamics. The stone crab [Menippe spp.) is found throughout southwestern North Atlantic waters, from North Carolina through the Gulf of Mexico and the Central American Caribbean, including the Greater Antilles. Recent observations suggest that stone crabs have become better established on certain oyster reefs in North Carolina than in the early 1900s when they we first observed in NC. To assess the predatory impact of stone crabs on oysters, we (1) quantified stone crab densities on subtidal oyster reefs in Pamlico Sound, NC using scuba surveys, and (2) conducted laboratory predation experiments to assess the functional response of stone crabs to varying densities of oysters. We then (3) analyzed previously unpublished functional response data on another important oyster predator, the mud crab Panopeus herbstii. Finally, we (4) compared and contrasted potential predatory impacts of stone, mud and blue crabs (Callinectes sapidus). The functional response data and analyses for both stone crabs and mud crabs were consistent with a type II functional response. Mud crabs, on a m~2 basis, inflicted the highest proportional mortality on oysters over a 24 hour period, followed by stone and then blue crabs. Proportional mortality did not vary significantly with oyster size; however, relatively small and large oysters were consumed disproportionately less than medium-sized oysters, likely due to the mechanical inability of stone crabs to handle small oysters, and the inability to crush large oysters. Although stone crabs appear to be established in Pamlico Sound at densities equivalent to densities in other systems such as the U.S. Florida Panhandle, their predatory activities on oysters are not expected to have as significant a negative impact on oyster populations compared to other resident predators such as mud crabs.
机译：单个物种的范围扩大和种群建立会对先前建立的食物网和捕食者-猎物动态产生重大影响。石蟹（Menippe spp。）遍布北大西洋西南海域，从北卡罗来纳州到墨西哥湾和中美洲加勒比海地区，包括大安的列斯群岛。最近的观察表明，与我们在北卡罗来纳州首次观察到的1900年代初期相比，北卡罗来纳州某些牡蛎礁上的石蟹已经变得更好。为了评估石蟹对牡蛎的掠食性影响，我们（1）使用水肺调查对北卡罗来纳州帕姆利科桑德的潮汐牡蛎礁石蟹的密度进行了量化，并且（2）进行了实验室捕食实验，以评估石蟹对各种变化的功能响应牡蛎的密度。然后，我们（3）在另一个重要的牡蛎捕食者Panopeus herbtiii上分析了以前未发布的功能响应数据。最后，我们（4）比较并对比了石，泥和青蟹（Callinectes sapidus）的潜在掠食性影响。石蟹和泥蟹的功能反应数据和分析均与II型功能反应一致。以m〜2为基准，泥蟹在24小时内对牡蛎造成的比例死亡率最高，其次是石蟹，然后是蓝蟹。牡蛎大小的比例死亡率没有显着变化。然而，相对较小和较大的牡蛎比中等大小的牡蛎消耗的比例要少得多，这可能是由于石蟹的机械能力不足以处理小牡蛎，并且不能压碎大牡蛎。尽管在Pamlico Sound建立的石蟹密度与其他系统（例如美国佛罗里达潘汉德尔）的密度相同，但与其他常驻捕食者相比，预计它们对牡蛎的捕食活动不会对牡蛎种群产生显着的负面影响。泥蟹。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号