Ventilatory and behavioural responses of the marbled sole Pseudopleuronectes yokohamae to progressive hypoxia.
Ventilatory and behavioural responses of the marbled sole Pseudopleuronectes yokohamae to progressive hypoxia.
复制标题
横滨假侧脑鱼对进行性缺氧的通气和行为反应。
DOI：
10.1111/jfb.13319
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发表时间：
2017
影响因子：
2
通讯作者：
H. Mitamura
中科院分区：
文献类型：
--
作者：
Hideaki Nishizawa;Y. Kono;N. Arai;Jun Shoji;H. Mitamura
本研究确定了在实验诱导的溶解氧（DO）水平逐步下降的大理石唯一的Pseudopleuronectes yokohamae的排泄和行为反应。通气频率随DO水平的降低而增加，从常氧到2.75 mg O2 l-1，然后在DO水平从2.00降低到0.75 mg O2 l-1时通气频率降低。在DO水平低于2.00毫克l-1，在底部的行为受到抑制，而回避行为增加。回避行为的减少，观察到从1·00至0·75毫克O2 l-1。在1.00 ~ 0.75mgO_2l ~（-1）的DO水平下，倒位反转和失能现象表明，对横钩原螯虾的亚致死效应被诱导。在亚致死DO水平之前观察到的反应可以解释为维持氧摄取、减少日常活动和促进回避的努力。所观察到的DO水平阈值，诱导行为反应，除了亚致死效应，表明缺氧耐受性是很重要的了解缺氧对沿海生态系统的影响。
This study identified ventilatory and behavioural responses in the marbled sole Pseudopleuronectes yokohamae under experimentally induced progressive decreases in dissolved oxygen (DO) levels. Ventilation frequency showed an increase with decreasing DO levels from normoxia to 2·75 mg O2 l-1 , followed by a decrease in ventilation frequency at decreased DO levels from 2·00 to 0·75 mg O2 l-1 . At DO levels below 2·00 mg l-1 , behaviours at the bottom were suppressed, whereas avoidance behaviours increased. A decrease in avoidance behaviours was observed from 1·00 to 0·75 mg O2 l-1 . Upside-down reversal and incapacitation at DO levels of 1·00-0·75 mg O2 l-1 suggested that sublethal effects on P. yokohamae were induced. The responses observed before the sublethal DO level could be interpreted as an effort to maintain oxygen uptake, reduce routine activities and facilitate avoidance. The observed DO level thresholds that induce behavioural responses, in addition to sublethal effects, indicate hypoxia-tolerance that is important for understanding the effects of hypoxia on coastal ecosystems.