Economy of arm autotomy in the mesopelagic squid Octopoteuthis deletron
Economy of arm autotomy in the mesopelagic squid Octopoteuthis deletron
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DOI：
10.3354/meps09714
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发表时间：
2012-01-01
影响因子：
2.5
通讯作者：
Bush, Stephanie L.
中科院分区：
文献类型：
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作者：
Bush, Stephanie L.
1972年，使用遥控潜水器观察和收集中上层鱿鱼poteuthis deletron Young。我记录了许多人的手臂缩短，钝端和再生的手臂提示，这可能是手臂自切的指示，即丢弃身体部分作为防御。为了验证O. deletron能够进行手臂自切，实验室研究和使用ROV的原位实验试图诱导自切。我在组织切片的手臂上寻找自切骨折平面。O. deletron能够进行手臂自切，但需要牵引才能进行。O. deletron有许多可以切断臂的地方;臂断裂总是发生在紧邻相互作用点的近端，最大限度地减少了组织损失，并证明了“自切经济性”。尽管该物种可以在手臂长度的任何沿着自断，但在我们的组织学切片中仅发现少数明确的骨折平面，这表明自断可能是通过防御性相互作用期间拉伸强度的丧失而发生的。号手术deletron，一个自动切断的手臂通常鞭打和终端臂的发光生物发光-无论是稳定的辉光，闪烁和关闭，或两者兼而有之-这可能是一个重要的一部分捕食者分心与自动切断在黑暗中，中层沃茨。O. deletron是第一个报道的鱿鱼自切其手臂，唯一已知的头足类动物能够经济的自切，并且是已知的使用攻击自切的极少数物种之一，其中捕食者被抓住身体的一部分，随后自切。
Remotely operated vehicles (ROVs) were used to observe and collect the meso pelagic squid Octopoteuthis deletron Young, 1972. I documented numerous individuals with shortened, blunt-ended arms and regenerating arm-tips, which may be indicative of arm autotomy, i.e. the jettisoning of a body part as a defense. To test the hypothesis that O. deletron is capable of arm autotomy, laboratory investigations and an in situ experiment using ROVs attempted to induce autotomy. I looked for autotomy fracture planes in histologically sectioned arms. O. deletron is capable of arm autotomy, but it requires traction to occur. O. deletron has numerous places where an arm can sever; arm breakage always occurred immediately proximal to the point of interaction, minimizing tissue loss, and demonstrating 'economy of autotomy'. Despite the fact that this species can autotomize an arm anywhere along its length, only a few well-defined fracture planes were found in our histological sections, indicating that autotomy probably occurs via loss of tensile strength during a defensive interaction. In O. deletron, an autotomized arm usually thrashes and the terminal arm photophore bioluminesces-whether a steady glow, flashing on and off, or both-which could be an important part of predator distraction associated with autotomy in dark, mesopelagic waters. O. deletron is the first squid reported to autotomize its arms, the only cephalopod known to be capable of economy of autotomy, and is one of very few species known to use attack autotomy, whereby a predator is grasped by a body part that is subsequently autotomized.