Ocean acidification promotes otolith growth and calcite deposition in gilthead sea bream (Sparus aurata) larvae

被引：28

作者：

Coll-Llado, Clara ^{[1
,2
]}

Giebichenstein, Jan ^{[3
]}

Webb, Paul B. ^{[4
]}

Bridges, Christopher R. ^{[3
]}

de la Serrana, Daniel Garcia ^{[1
]}

机构：

[1] Univ St Andrews, Sch Biol, Scottish Oceans Inst, Gatty Marine Lab, St Andrews, Fife, Scotland

[2] Xelect Ltd, Horizon House, St Andrews, Fife, Scotland

[3] Heinrich Heine Univ, Inst Stoffwechselphysiol AG Ecophysiol, Dusseldorf, Germany

[4] Univ St Andrews, Sch Chem, St Andrews, Fife, Scotland

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

关键词：

INNER-EAR; SAGITTAL OTOLITHS; VATERITE OTOLITHS; FISH; ENDOLYMPH; CHEMISTRY; ARAGONITE; IMPACTS; CO2; POPULATIONS;

D O I：

10.1038/s41598-018-26026-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The effects of ocean acidification on otolith crystallization and growth rates were investigated in gilthead sea bream (Sparus aurata) larvae. Larvae were exposed to three different pH levels: pH8.2, pH7.7 and pH7.3 for a period of 18 days post-fertilization. For the first time, we demonstrate that pH has a significant impact on the carbonate polymorph composition, showing calcite in a significant percentage of individuals at low pH. Around 21% of the larvae exposed to pH7.3 showed irregular calcitic otoliths rather than commonly found round aragonitic otoliths. Calcitic otoliths showed a moderate level of heritability suggesting an important role of genetic factors. We also observed significantly larger otoliths in larvae reared at pH7.7 and pH7.3 compared to pH8.2 in both sagittae and lapilli. Our results demonstrate that otolith growth rates in gilthead sea bream larvae increase at low pH while a significant proportion of larvae are prone to the formation of calcitic otoliths at pH7.3.

引用

页数：10

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