dissolved oxygen and ammonia levels in water that affect plasma ionic content and gallbladder bile in silver catfish níveis de oxigênio dissolvido e amônia na água afetam o conteúdo iônico do plasma e da bile vesicular em jundiá

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ID: 155606
2009
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Abstract
Ionic contents (Na+, K+ and Cl-) of plasma and gallbladder bile (GB) of juveniles silver catfish, Rhamdia quelen (156.1±0.2g, 28.2±0.3cm), were determined in three different times (0, 6 and 24h) after exposure to: a) control or high dissolved oxygen (DO = 6.5mg L-1) + low NH3 (0.03mg L-1); b) low DO (3.5mg L-1) + low NH3; c) high DO + high NH3 (0.1mg L-1); and d) low DO + high NH3. High waterborne NH3 or low DO levels increased plasma and GB ion levels. These parameters might have followed different mechanisms to affect osmoregulation since a synergic effect of these variables was detected.
O conteúdo iônico (Na+, K+ e Cl-) do plasma e da bile vesicular (BV) de juvenis de jundiá, Rhamdia quelen (156,1±0,2g, 28,2±0,3cm), foi determinado em três diferentes tempos (0, 6 e 24h) após exposi��ão a: a) controle ou alto oxigênio dissolvido (OD = 6,5mg L-1) + baixa NH3 (0,03mg L-1); b) baixo OD (3,5mg L-1) + baixa NH3; c) alto OD + alta NH3 (0,1mg L-1); e baixo OD + alta NH3 . Alta concentração de amônia ou baixo oxigênio dissolvido na água aumentaram os níveis iônicos no plasma e na BV. Aparentemente, os efeitos osmorregulatórios desses parâmetros podem estar relacionados a mecanismos distintos, pois foi detectado efeito sinérgico sobre essa alteração osmorregulatória.
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Authors Alexssandro Geferson Becker, Luciano de Oliveira Garcia, Daiani Kochhann, Jamile Fabbrin Gonçalves, Vania Lúcia Loro, Bernardo Baldisserotto
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Journal Trials
Year 2009
DOI
DOI not found
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000600020
Keywords
Hypoxia osmoregulationagricultureagriculture (general)

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