Enormous gill chambers of deep-sea coffinfishes (Lophiiformes: Chaunacidae) support unique ventilatory specialisations such as breath holding and extreme inflation.
Enormous gill chambers of deep-sea coffinfishes (Lophiiformes: Chaunacidae) support unique ventilatory specialisations such as breath holding and extreme inflation.
复制标题
深海棺鱼（Lophiiformes：Chaunacidae）巨大的鳃室支持独特的通气功能，例如屏气和极度充气。
作者：
Nicholas P Long;S. Farina
深海栖息地往往有利于物种低能量的需求，因此，我们预测，深海鱼类将有行为和形态专业化的鳃排泄系统，以减少能量成本泵水通过鳃。然而，由于缺乏对活体鱼类进行实验室实验的能力，深海鱼类的功能形态学研究是困难的。在这项研究中，我们结合了远程操作的车辆记录的公开可用的视频分析与博物馆标本的详细解剖研究，以记录在棺材鱼（Lophiiformes：Chaunacidae）中观察到的巨大鳃室的功能形态。Chaunacids，像其他lophiiforms一样，表现出高度专业化的解剖结构，如扩大的鳃蒂装置和限制鳃开口，但视频显示他们以一种新的和不寻常的方式使用这种解剖结构。我们观察到8个个体以0.03-0.004 Hz的速率非常缓慢地呼吸，在此期间，鳃腔充满，但我们在26至245 s的时间内没有看到吸气或呼气。这种屏住呼吸的行为在任何其他鱼类中都没有观察到，可能是非常有效的。这种鳃腔的膨胀也使身体体积增加了30%，使它们更球形，更难被捕获，就像河豚（河豚科）的胃膨胀一样。我们还使用微型计算机断层扫描（CT）来记录支持这种独特行为的巨大的鳃蒂射线和相关肌肉。
Deep sea habitats tend to favor species with low energetic demands, and therefore we predict that deep sea fishes will have behavioral and morphological specializations of the gill ventilatory system to reduce the energetic cost of pumping water across the gills. However, it is difficult to study functional morphology of deep sea fishes due the lack of ability to conduct laboratory experiments with living fishes. For this study, we combined analysis of publicly available video recorded by remote-operated vehicles (ROV) with detailed anatomical study of museum specimens to document the functional morphology of the massive gill chambers that are observed in coffinfishes (Lophiiformes: Chaunacidae). Chaunacids, like other lophiiforms, exhibit highly specialised ventilatory anatomy such as an enlarged branchiostegal apparatus and restricted gill openings, but videos show them using this anatomy in a new and unusual way. We observed eight individuals ventilating extremely slowly at rates of 0.03-0.004 Hz, during which the gill chambers were full yet we saw no inhalation or exhalation for periods of 26 to 245 s. This holding breath behaviour has not been observed in any other fishes and is probably highly energetically efficient. This inflation of the gill chambers also increases body volume by up to 30%, making them more globose and difficult to be taken as prey, much like stomach inflation in pufferfishes (Tetraodontidae). We also used micro computed-tomography (CT) scans to document the enormous branchiostegal rays and associated muscles that support this unique behaviour.
DOI：
10.1159/000115896
发表时间：
1989
期刊：
Brain, behavior and evolution
影响因子：
--
作者：
Jacqueline F. Webb
通讯作者：
Jacqueline F. Webb