The swimming kinematics of larval Atlantic cod, Gadus morhua L., are resilient to elevated seawater pCO2
The swimming kinematics of larval Atlantic cod, Gadus morhua L., are resilient to elevated seawater pCO2
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DOI：
10.1007/s00227-012-2054-y
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发表时间：
2013-08-01
期刊：
影响因子：
2.4
通讯作者：
Skiftesvik, A. B.
中科院分区：
文献类型：
--
作者：
Maneja, R. H.;Frommel, A. Y.;Skiftesvik, A. B.
从使用剪影视频摄影获得的游泳路径记录中提取了2010年3月至5月在三种pCO（2）条件（对照-370，中等-1800和高-4200 mu atm）下培养的孵化后（dph）12天和27天的大西洋鳕鱼幼鱼游泳行为的动力学。对游泳路径进行了分析，包括游泳持续时间、距离和速度、停止持续时间以及水平和垂直转向角度，以确定海水pCO（2）升高是否会影响大西洋鳕鱼幼鱼的游泳运动学。测试的大多数变量没有显着差异：大西洋鳕鱼幼虫在12和27 dph时的游泳运动学对极高的pCO（2）水平具有高度弹性。尽管如此，在最高pCO（2）浓度下培养的鳕鱼幼虫显示出的垂直转向角（中位转向角，15 A度）比在12 dph（但不是在27 dph）下的对照（19 A度）和中等（19 A度）处理中的幼虫更受限制。在27 dph（但不是在12 dph）时，与对照组（0.32 s）相比，还观察到高剂量组鳕鱼幼虫的停止持续时间（中位停止持续时间，0.28 s）显著减少。这些细微差异的功能和生态意义尚不清楚，因此，需要进一步调查，以确定它们是否与生态有关或虚假。
Kinematics of swimming behavior of larval Atlantic cod, aged 12 and 27 days post-hatch (dph) and cultured under three pCO(2) conditions (control-370, medium-1800, and high-4200 mu atm) from March to May 2010, were extracted from swim path recordings obtained using silhouette video photography. The swim paths were analyzed for swim duration, distance and speed, stop duration, and horizontal and vertical turn angles to determine whether elevated seawater pCO(2)-at beyond near-future ocean acidification levels-affects the swimming kinematics of Atlantic cod larvae. There were no significant differences in most of the variables tested: the swimming kinematics of Atlantic cod larvae at 12 and 27 dph were highly resilient to extremely elevated pCO(2) levels. Nonetheless, cod larvae cultured at the highest pCO(2) concentration displayed vertical turn angles that were more restricted (median turn angle, 15A degrees) than larvae in the control (19A degrees) and medium (19A degrees) treatments at 12 dph (but not at 27 dph). Significant reduction in the stop duration of cod larvae from the high treatment (median stop duration, 0.28 s) was also observed compared to the larvae from the control group (0.32 s) at 27 dph (but not at 12 dph). The functional and ecological significance of these subtle differences are unclear and, therefore, require further investigation in order to determine whether they are ecologically relevant or spurious.