Deionized ammonium (NH3) acute toxicity (LC50-96h) in Patagonian blenny juveniles (Eleginops
maclovinus
) was assessed. Concentrations of deionized ammonium in salt water were prepared by
using 24.09 ± 2.1 g ammonium chloride (NH4Cl). Fish were exposed in triplicates to different
ammonium concentrations: 0.05; 0.094; 0.175; 0.325 and 0.605 mg NH3 L-1. Additionally, a control
group was included. Experimental fish were kept at a photoperiod of 16:8h. Average temperatures
were 16.24 ± 1.40°C. Oxygen concentration was 7.16 ± 0.40 mg L-1. Water pH was 7.89 ± 0.2. LC50-
96 h, was estimated by using Probit statistical method (95% intervals) using EPA software (1993).
Juveniles of E. maclovinus showed a LC50-96h of 0.413 mg NH3 L-1 value, different from most marine
species. This study presents the first record of ammonia toxicity in marine species of Chile.

Author (s) Details

A. Mardones
Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile and Núcleo de Investigación en Producción Alimentaria UC Temuco, P.O. Box 15-D, Temuco, Chile.

M. González
CMPC Celulosa, Panamericana Sur, Km 471, Laja, Chile.

C. Rivas-Mancilla
Universidad Santo Tomás, Buena Vecindad 91, Esquina Egaña, Puerto Montt, Chile.

R. Vega
Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile and Núcleo de Investigación en Producción Alimentaria UC Temuco, P.O. Box 15-D, Temuco, Chile.

A. Augsburger
Universidad Santo Tomás, Buena Vecindad 91, Esquina Egaña, Puerto Montt, Chile.

F. Encina
Departamento de Ciencias Ambientales, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile and Núcleo de Estudios Ambientales UC Temuco, P.O. Box 15-D, Temuco, Chile.

P. De los Ríos
Departamento de Ciencias Ambientales, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile and Departamento de Ciencias Biológicas y Químicas, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile.

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