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Keidi Carolina dos Santos Bolner ; Felipe Link de Rosso ; Vania Lucia Loro ; Bernardo Baldisserotto ;Semina: Ciências Agrárias 2015, 36 6

Autor: Carlos Eduardo Copatti

Fuente: http://www.redalyc.org/articulo.oa?id=445744152041


Introducción



Semina: Ciências Agrárias ISSN: 1676-546X semina.agrarias@uel.br Universidade Estadual de Londrina Brasil Copatti, Carlos Eduardo; dos Santos Bolner, Keidi Carolina; Link de Rosso, Felipe; Loro, Vania Lucia; Baldisserotto, Bernardo Tolerance of piava juveniles to different ammonia concentrations Semina: Ciências Agrárias, vol.
36, núm.
6, noviembre-diciembre, 2015, pp.
3991-4001 Universidade Estadual de Londrina Londrina, Brasil Available in: http:--www.redalyc.org-articulo.oa?id=445744152041 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative DOI: 10.5433-1679-0359.2015v36n6p3991 Tolerance of piava juveniles to different ammonia concentrations Tolerância de juvenis de piava para diferentes concentrações de amônia na água Carlos Eduardo Copatti1*; Keidi Carolina dos Santos Bolner2; Felipe Link de Rosso2; Vania Lucia Loro3; Bernardo Baldisserotto4 Abstract The objective of this study was to evaluate the tolerance of piavas (Leporinus obtusidens) to ammonia (NH3) by measuring its effects on plasma ion levels and tissue metabolic parameters.
Piava juveniles (25-30 g) were exposed to ve concentrations of NH3 (mg L-1): 0.003 (control), 0.1, 0.4, 0.7, and 1.4; after 96 hours, plasma levels of Na , K , Cl- and NH4 ions and metabolic and enzyme activity in tissues (liver, kidneys, gills and muscle) were measured.
The lethal concentration (LC50; 96h) of NH3 was 0.27 mg L-1.
As NH3 increased, Na and NH4 in the plasma increased and K decreased.
In addition, Na -K ATPase activity concomitantly increased in the gills and decreased in the kidneys.
Glucose, glycogen, and protein levels decreased, while lactate and ammonia increased in the tissues of piava juveniles that were treated with higher concentrations of ammonia.
The observe...





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