2006
DOI: 10.1590/s1413-70542006000500027
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Abstract: RESUMOA presença de derivados do nitrogênio na água indica processos biológicos ativos influenciados por poluição orgânica, podendo, em altas concentrações, causar danos fisiológicos e até mortalidade em organismos aquáticos. Com o objetivo de determinar o efeito letal da amônia não ionizada e do nitrito, alevinos de cará (Cichlasoma facetum) foram expostos por 96 horas a diversas concentrações desses compostos: de 0 a 4,60 mg. ABSTRACTThe nitrogen is derivates in water presence indicates active biological pr… Show more

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Cited by 9 publications
(5 citation statements)
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“…This interaction among variables can be explained since they are all derived from nitrogenated compounds. According to Medeiros et al (2002) and Piedras et al (2006), nitrogen undergoes several changes in form and states of oxidation in the aquatic world. Those of greatest interest and in descending order of state of oxidation are: nitrate (NO 3 -), nitrite (NO 2 -), ammoniacal nitrogen (NH 4 -N) or ammonia (NH 3 or NH 4 + ) and organic nitrogen (dissolved or in suspension).…”
Section: Water Quality Index (Wqi)mentioning
confidence: 99%
“…This interaction among variables can be explained since they are all derived from nitrogenated compounds. According to Medeiros et al (2002) and Piedras et al (2006), nitrogen undergoes several changes in form and states of oxidation in the aquatic world. Those of greatest interest and in descending order of state of oxidation are: nitrate (NO 3 -), nitrite (NO 2 -), ammoniacal nitrogen (NH 4 -N) or ammonia (NH 3 or NH 4 + ) and organic nitrogen (dissolved or in suspension).…”
Section: Water Quality Index (Wqi)mentioning
confidence: 99%
“…High levels of inorganic nitrogen pollution are harmful to aquatic organisms, including fish and invertebrates (Arthur et al ., 1987; Camargo & Alonso, 2005, 2006; Piedras et al ., 2006). The negative correlation found between acanthocephalans and total ammonia nitrogen concentration may be a result of the direct negative effect of this substance on the definitive host of the parasite.…”
Section: Discussionmentioning
confidence: 99%
“…In both cases, fish tolerance to ammonia, nitrite and pH is the main focus of most of the research performed. [84][85][86][87] In addition, the toxic effects of pesticides and metals have also been considered. In fact, metals are potential disruptors of the ionic and osmotic balance in both fish and crustaceans.…”
Section: Aquatic Pollutants Of Concern and Biological Modelsmentioning
confidence: 99%