Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2
Rising seawater pCO2 (ocean acidification) presents a challenge for marine organisms. To counteract disturbances, many aquatic crustaceans excrete/accumulate acid-base equivalents through their gills; however, not much is known about the role of ammonia in this response. The present study investigat...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Marine Biology
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/1993/32673 |
id |
ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/32673 |
---|---|
record_format |
openpolar |
spelling |
ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/32673 2023-06-18T03:42:25+02:00 Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2 Hans, Stephanie Fehsenfeld, Sandra Weihrauch, Dirk 2013 application/pdf http://hdl.handle.net/1993/32673 eng eng Marine Biology http://hdl.handle.net/1993/32673 open access ammonia excretion ocean acidification gill epithelium Article 2013 ftunivmanitoba 2023-06-04T17:46:06Z Rising seawater pCO2 (ocean acidification) presents a challenge for marine organisms. To counteract disturbances, many aquatic crustaceans excrete/accumulate acid-base equivalents through their gills; however, not much is known about the role of ammonia in this response. The present study investigated the effects of elevated pCO2 on acid-base and ammonia regulation in the Dungeness crab, Metacarcinus magister on the whole animal and the isolated gill level. Hemolymph pCO2 and [HCO3-] increased in M. magister acclimated to elevated pCO2 while pH remained stable. Additionally, hemolymph [Na+], [Ca2+], and [SO42-] were significantly increased. When challenged with varying pH during gill perfusion, the pH of the artificial hemolymph remained relatively unchanged. Overall, ammonia production and excretion were reduced in crabs acclimated to elevated pCO2, demonstrating that either amino acid metabolism is reduced in response to this particular stress, or nitrogenous wastes are excreted in an alternative form. Article in Journal/Newspaper Ocean acidification MSpace at the University of Manitoba |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
topic |
ammonia excretion ocean acidification gill epithelium |
spellingShingle |
ammonia excretion ocean acidification gill epithelium Hans, Stephanie Fehsenfeld, Sandra Weihrauch, Dirk Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2 |
topic_facet |
ammonia excretion ocean acidification gill epithelium |
description |
Rising seawater pCO2 (ocean acidification) presents a challenge for marine organisms. To counteract disturbances, many aquatic crustaceans excrete/accumulate acid-base equivalents through their gills; however, not much is known about the role of ammonia in this response. The present study investigated the effects of elevated pCO2 on acid-base and ammonia regulation in the Dungeness crab, Metacarcinus magister on the whole animal and the isolated gill level. Hemolymph pCO2 and [HCO3-] increased in M. magister acclimated to elevated pCO2 while pH remained stable. Additionally, hemolymph [Na+], [Ca2+], and [SO42-] were significantly increased. When challenged with varying pH during gill perfusion, the pH of the artificial hemolymph remained relatively unchanged. Overall, ammonia production and excretion were reduced in crabs acclimated to elevated pCO2, demonstrating that either amino acid metabolism is reduced in response to this particular stress, or nitrogenous wastes are excreted in an alternative form. |
format |
Article in Journal/Newspaper |
author |
Hans, Stephanie Fehsenfeld, Sandra Weihrauch, Dirk |
author_facet |
Hans, Stephanie Fehsenfeld, Sandra Weihrauch, Dirk |
author_sort |
Hans, Stephanie |
title |
Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2 |
title_short |
Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2 |
title_full |
Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2 |
title_fullStr |
Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2 |
title_full_unstemmed |
Acid-base regulation in the Dungeness crab (Metacarcinus magister): effects of predicted future changes in environmental pCO2 |
title_sort |
acid-base regulation in the dungeness crab (metacarcinus magister): effects of predicted future changes in environmental pco2 |
publisher |
Marine Biology |
publishDate |
2013 |
url |
http://hdl.handle.net/1993/32673 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://hdl.handle.net/1993/32673 |
op_rights |
open access |
_version_ |
1769008336712237056 |