Dynamic measurements of black oystercatcher ( Haematopus bachmani ) predation on mussels ( Mytilus californianus )
Dynamic measurements of black oystercatcher (
Haematopus bachmani
) predation on mussels (
Mytilus californianus
)
复制标题
黑蛎鹬 ( Haematopus bachmani ) 捕食贻贝 ( Mytilus californianus ) 的动态测量
DOI：
10.1111/ivb.12240
复制
发表时间：
2019
影响因子：
1.2
通讯作者：
W. Dowd
中科院分区：
文献类型：
--
作者：
L. Miller;W. Dowd
潮间带贻贝在高潮和低潮期间可能面临各种捕食性物种的威胁，它们必须平衡捕食的威胁和其他需求，如进食和有氧呼吸。北美太平洋沿岸的黑牡蛎捕手（Haematopus bachmani）可以依靠贻贝Mytilus californianus作为其饮食的重要部分。观察表明，牡蛎catchers往往集中在贻贝开始张开他们的阀门在涨潮期间，以下期间的空中浮现。我们提出了详细的，自主的现场测量的动态三个这样的捕食事件在岩石潮间带。我们测量了施加在贻贝上的高达4 g的加速度，打开外壳并去除大部分组织所需的处理时间为115-290 s。在每种情况下，一只牡蛎捕手攻击一只贻贝，当涨潮开始溅起贻贝床时，它的壳瓣比它的邻居稍微宽一点，但是没有其他明显的贻贝特征，如体温或方向，可以与牡蛎捕手的个体猎物选择联系起来。
Intertidal zone mussels can face threats from a variety of predatory species during high and low tides, and they must balance the threat of predation against other needs such as feeding and aerobic respiration. Black oystercatchers (Haematopus bachmani) on the Pacific coast of North America can depend on the mussel Mytilus californianus for a substantial portion of their diet. Observations suggest that oystercatchers tend to focus on mussels beginning to gape their valves during rising tides, following periods of aerial emersion. We present detailed, autonomous field measurements of the dynamics of three such predation events in the rocky intertidal zone. We measured accelerations of up to 4 g imposed on mussels, with handling times of 115–290 s required to open the shell and remove the majority of tissue. In each case a single oystercatcher attacked a mussel that had gaped the shell valves slightly wider than its neighbors as the rising tide began to splash the mussel bed, but no other obvious characteristic of the mussels, such as body temperature or orientation, could be linked to the oystercatcher's individual prey choice.