Mechanisms of acid–base regulation in seawater-acclimated green crabs (Carcinus maenas)

Content Provider	Semantic Scholar
Author	Fehsenfeld, Sandra Weihrauch, Dirk
Copyright Year	2016
Abstract	The present study investigated acid–base regulatory mechanisms in seawater-acclimated green crabs (Carcinus maenas (L., 1758)). In full-strength seawater, green crabs are osmoconformers so that the majority of the observed responses were attributed to ion fluxes based on acid–base compensatory responses alone. Similar to observations in brackish-water-acclimated C. maenas, seawater-acclimated green crabs exposed to hypercapnia rapidly accumulated HCO3− in their hemolymph, compensating for the respiratory acidosis caused by excess hemolymph pCO2. A full recovery from the decreased hemolymph pH after 48 h, however, was not observed. Gill perfusion experiments on anterior gill No. 5 indicated the involvement of all investigated genes (i.e., bicarbonate transporters, V-(H+)-ATPase, Na+/K+-ATPase, K+-channels, Na+/H+-exchanger, and carbonic anhydrase) in the excretion of acid–base equivalents. The most significant effects were observed when targeting a potentially cytoplasmic and (or) basolaterally localized V...
Starting Page	95
Ending Page	107
Page Count	13
File Format	PDF HTM / HTML
DOI	10.1139/cjz-2015-0132
Volume Number	94
Alternate Webpage(s)	https://tspace.library.utoronto.ca/bitstream/1807/71116/1/cjz-2015-0132.pdf
Alternate Webpage(s)	https://doi.org/10.1139/cjz-2015-0132
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article