Abstract：
:Global ocean acidification is expected to chronically lower the pH to 7.3 (>2200 µatm seawater pCO2) by the year 2300. Acute hypercapnia already occurs along the South African west and south coasts due to upwelling- and low-oxygen events, with increasing frequency. In the present project we investigated the impact of hypercapnia on the endemic demersal shark species Haploblepharus edwardsii. Specifically, we experimentally analysed acid-base regulation during acute and chronic hypercapnia, the effects of chronic hypercapnia on growth rates and on denticle structure- and composition. While H. edwardsii are physiologically well adapted to acute and chronic hypercapnia, we observed, for the first time, denticle corrosion as a result of chronic exposure. We conclude that denticle corrosion could increase denticle turnover and compromise hydrodynamics and skin protection.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Dziergwa J,Singh S,Bridges CR,Kerwath SE,Enax J,Auerswald Ldoi
10.1038/s41598-019-54795-7subject
Has Abstractpub_date
2019-12-19 00:00:00pages
18668issue
1issn
2045-2322pii
10.1038/s41598-019-54795-7journal_volume
9pub_type
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