Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juveniles
The objective of this study was to verify net ion fluxes and ammonia excretion in silver catfish transported in plastic bags at three different loading densities: 221, 286 and 365g L-1 for 5h. A water sample was collected at the beginning and at the end of the transport for analysis of water parameters. There was a significant positive relationship between net ion effluxes and negative relationship between ammonia excretion and loading density, demonstrated by the following equations: Na+: y-24.5-0.27x, r2=0.99, Cl-: y=40.2-0.61x, r2=0.98, K+: y=8.0-27.6x, r2=0.94; ammonia excretion: y=-11.43+0.017x, r2=0.95, where y: net ion flux (mmol kg-1 h-1) or ammonia excretion (mg kg-1 h-1) and x: loading density (g). Therefore, the increase of loading density increases net ion loss, but reduces ammonia excretion during the transport of silver catfish, indicating the possibility of ammonia accumulation
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Universidade Federal de Santa Maria
2015
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oai:scielo:S0103-847820150010018542016-02-26Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juvenilesGarcia,Luciano de OliveiraBarcellos,Leonardo José GilBaldisserotto,Bernardo fish transport ionoregulation load density The objective of this study was to verify net ion fluxes and ammonia excretion in silver catfish transported in plastic bags at three different loading densities: 221, 286 and 365g L-1 for 5h. A water sample was collected at the beginning and at the end of the transport for analysis of water parameters. There was a significant positive relationship between net ion effluxes and negative relationship between ammonia excretion and loading density, demonstrated by the following equations: Na+: y-24.5-0.27x, r2=0.99, Cl-: y=40.2-0.61x, r2=0.98, K+: y=8.0-27.6x, r2=0.94; ammonia excretion: y=-11.43+0.017x, r2=0.95, where y: net ion flux (mmol kg-1 h-1) or ammonia excretion (mg kg-1 h-1) and x: loading density (g). Therefore, the increase of loading density increases net ion loss, but reduces ammonia excretion during the transport of silver catfish, indicating the possibility of ammonia accumulationinfo:eu-repo/semantics/openAccessUniversidade Federal de Santa MariaCiência Rural v.45 n.10 20152015-10-01info:eu-repo/semantics/othertext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001001854en10.1590/0103-8478cr20141420 |
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Garcia,Luciano de Oliveira Barcellos,Leonardo José Gil Baldisserotto,Bernardo |
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Garcia,Luciano de Oliveira Barcellos,Leonardo José Gil Baldisserotto,Bernardo Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juveniles |
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Garcia,Luciano de Oliveira Barcellos,Leonardo José Gil Baldisserotto,Bernardo |
| author_sort |
Garcia,Luciano de Oliveira |
| title |
Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juveniles |
| title_short |
Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juveniles |
| title_full |
Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juveniles |
| title_fullStr |
Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juveniles |
| title_full_unstemmed |
Net ion fluxes and ammonia excretion during transport of Rhamdia quelen juveniles |
| title_sort |
net ion fluxes and ammonia excretion during transport of rhamdia quelen juveniles |
| description |
The objective of this study was to verify net ion fluxes and ammonia excretion in silver catfish transported in plastic bags at three different loading densities: 221, 286 and 365g L-1 for 5h. A water sample was collected at the beginning and at the end of the transport for analysis of water parameters. There was a significant positive relationship between net ion effluxes and negative relationship between ammonia excretion and loading density, demonstrated by the following equations: Na+: y-24.5-0.27x, r2=0.99, Cl-: y=40.2-0.61x, r2=0.98, K+: y=8.0-27.6x, r2=0.94; ammonia excretion: y=-11.43+0.017x, r2=0.95, where y: net ion flux (mmol kg-1 h-1) or ammonia excretion (mg kg-1 h-1) and x: loading density (g). Therefore, the increase of loading density increases net ion loss, but reduces ammonia excretion during the transport of silver catfish, indicating the possibility of ammonia accumulation |
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Universidade Federal de Santa Maria |
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2015 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001001854 |
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