Dissolved oxygen and ammonia levels in water that affect plasma ionic content and gallbladder bile in silver catfish

Ciência Rural

Alexssandro Geferson Becker²  Luciano De Oliveira Garcia²  Daiani Kochhann¹  Jamile Fabbrin Gonçalves¹  Vania Lúcia Loro¹  Bernardo Baldisserotto¹ 

[1] ,Universidade Federal de Santa MariaSanta Maria RS ,Brasil

关键词: nitrogen compound;    hypoxia;    ion levels;    jundiá;    osmoregulation;    amônia;    hipóxia;    níveis iônicos;    jundiá;    osmorregulação;   

DOI  :  10.1590/S0103-84782009005000132

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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