spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online July 14, 2008
Journal of Experimental Biology 211, 2542-2550 (2008)
Published by The Company of Biologists 2008
doi: 10.1242/jeb.015586
This Article
Right arrow Summary Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cooper, C. A.
Right arrow Articles by Wilson, R. W.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Cooper, C. A.
Right arrow Articles by Wilson, R. W.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Post-prandial alkaline tide in freshwater rainbow trout: effects of meal anticipation on recovery from acid–base and ion regulatory disturbances

C. A. Cooper* and R. W. Wilson

School of Biosciences, University of Exeter, Hatherly Laboratories, Exeter, Devon EX4 4PS, UK


Figure 1
View larger version (11K):
[in this window]
[in a new window]

  		Fig. 1. The change in (A) blood pH (solid line), plasma HCO3– (mmol l–1; dashed line), and (B) the partial pressure of CO2 (PCO2) over the duration of the experiment in which fish were fed a 1% of body mass ration via an oesophageal catheter. Values are means ± s.e.m. (N=11). An asterisk denotes a significant difference when compared with pre-feed levels [adjusted P<0.05; RM-ANOVA followed by a multiple pairwise control (pre-feed) comparisons versus post-feed groups using the Bonferroni t-test method], whereas a dagger indicates a significant difference of {Delta}pH when compared with voluntarily fed fish (P<0.05; paired t-test).

 

Figure 2
View larger version (11K):
[in this window]
[in a new window]

  		Fig. 2. Plasma concentrations of (A) chloride (Cl–, dashed line), sodium (Na+, solid line), (B) potassium (K+, solid line), calcium (Ca2+, dashed line) and magnesium (Mg2+, dotted line), over the duration of the experiment in which fish were fed a 1% of body mass ration via an oesophageal catheter. Values are means ± s.e.m. (N=11). A single asterisk denotes P<0.05, whereas a double asterisk indicates P<0.01 [adjusted P value; RM-ANOVA followed by a multiple pairwise control (pre-feed) comparisons versus post-feed groups using the Bonferroni t-test method].

 

Figure 3
View larger version (7K):
[in this window]
[in a new window]

  		Fig. 3. Fluxes of titratable alkalinity (JTAlk, grey bars), total ammonia (JTamm, white bars) and net acidic equivalents (JnetH+ black bars) over a 72 h period after fish were fed a 1% of body mass ration via an oesophageal catheter. Positive values indicate base excretion and negative values indicate acid excretion. Values are means ± s.e.m. (N=8–11). An asterisk denotes a significant difference when compared with pre-feed levels [adjusted P<0.05; RM-ANOVA followed by a multiple pairwise control (pre-feed) comparisons versus post-feed groups using the Bonferroni t-test method], whereas a dagger indicates a significant difference of {Delta}JTAlk or JTamm when compared with voluntarily fed fish (P<0.05; paired t-test).

 

Figure 4
View larger version (10K):
[in this window]
[in a new window]

  		Fig. 4. The change in (A) blood pH (solid line), plasma HCO3– (mmol l–1, dashed line) and (B) the partial pressure of CO2 (PCO2), over the duration of the experiment when fish fed voluntarily on a 1% of body mass ration. Values are means ± s.e.m. (N=8). An asterisk denotes a significant difference when compared with pre-feed levels [adjusted P<0.05; RM-ANOVA followed by a multiple pairwise control (pre-feed) comparisons versus post-feed groups using the Bonferroni t-test method], whereas a dagger indicates a significant difference in {Delta}pH when compared with catheter-fed fish (P<0.05; paired t-test).

 

Figure 5
View larger version (10K):
[in this window]
[in a new window]

  		Fig. 5. Plasma concentrations of (A) chloride (Cl–, solid line), sodium (Na+, dashed line), (B) potassium (K+, solid line), calcium (Ca2+, dashed line) and magnesium (Mg2+, dotted line), over the duration of the experiment when fish were allowed to feed voluntarily on a 1% of body mass ration. Values are means ± s.e.m. (N=8).

 

Figure 6
View larger version (8K):
[in this window]
[in a new window]

  		Fig. 6. Fluxes of titratable alkalinity (JTAlk, grey bars), total ammonia (JTamm, white bars) and net acidic equivalents (JnetH+ black bars) over a 72 h period after fish fed voluntarily on a 1% of body mass ration. Positive values indicate base excretion and negative values indicate acid excretion. Values are means ± s.e.m. (N=8). An asterisk denotes a significant difference when compared with pre-feed levels (adjusted P<0.05; RM-ANOVA followed by a multiple pairwise control (pre-feed) comparisons versus post-feed groups using the Bonferroni t-test method), whereas a dagger indicates a significant difference of {Delta}JTAlk and JTamm when compared with voluntarily fed fish (P<0.05; paired t-test).

 

Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?



© The Company of Biologists Ltd 2008