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      EFECTOS ECOTOXICOLOGICOS DEL CARTAP SOBRE POECILIA RETICULATA "GUPPY'' (POECILIDAE) Y PARACHEIRODON INNESI "NEON TETRA'' (CHARACIDAE) Translated title: ECOTOXICOLOGICAL EFFECTS OF CARTAP ON POECILIA RETICULATA "GUPPY'' (POECILIDAE) AND PARACHEIRODON INNESI "NEON TETRA'' (CHARACIDAE)

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          Abstract

          Se evaluó el impacto ecotoxicológico del insecticida carbámico cartap (1,3 di (carbamoytio)-2-dimetiloaminopropano) usado para el control de plagas agrícolas y como molusquicida de vectores de importancia en Salud Pública, sobre dos especies de peces del ecosistema acuático continental: Poecilia reticulata (Peters 1859) "guppy" (Poecilidae) y Paracheirodon innesi (Myers 1936) ``Neon Tetra" (Characidae). Ellos fueron utilizados como organismos no destinatarios en ensayos de corta duración, para determinar el impacto toxicológico del cartap. Para ambas especies de peces se evaluó el porcentaje de mortalidad, y dos respuestas subletales: el incremento del movimiento opercular y el nado extraño. A 3 h de exposición para P. reticulata, se encontró un valor de CL50 (Concentración letal media) de 6,75 mg•L-1 y valores de CE50 (Concentración efectiva media) de <7,55 y < 8,16 mg•L-1 para el incremento del movimiento opercular y nado extraño, respectivamente. Para P. innesi, se encontró un valor de CL50 de <0,02 mg•L-1 y valores de CE50 de < 0,01 y < 0,03 mg•L-1, para el incremento del movimiento opercular y nado extraño, respectivamente. P. innesi fue más sensible al cartap que P. reticulata. Se calculó los cuocientes de riesgo (RQ) para la evaluación del riesgo ambiental (ERA) de este insecticida sobre el ecosistema acuático, indicando que P. innesi es más adecuada que P. reticulata como herramienta ecotoxicológica para evaluar cartap.

          Translated abstract

          The ecotoxicological impact of the carbamate insecticide cartap (1,3 di (carbamoythio)-2-dimethyloaminopropan) used for agriculture pests and as mollusquicide of vectors of Public Health importance was evaluated, on two fish species of the continental aquatic ecosystem. Poecilia reticulata (Peters 1859) ``guppy" (Poecilidae) and Paracheirodon innesi (Myers 1936) ``Neon Tetra" (Characidae) were employed as non-target organisms in assays of short duration to determine the toxicological impact of cartap. For both fish, percentage of mortality and two sublethal responses: increase of opercula movement and strange swim, were evaluated. In P. reticulata after 3 h exposure it was found a LC50 (mean Lethal Concentration) of 6.75 mg'•L-1 and values of EC50 (mean Effective Concentration) of <7.55 and <8.16 mg•L-1 as speed up of opercula movement and strange swim, respectively. For P. innesi, it was found an LC50 value of <0.02 mg•L-1 and values of EC50 of <0.01 and <0.03 mg•L-1, as speed up of opercula movement and strange swim, respectively. P. innesi was more sensitive to cartap than P. reticulata. Risk Quotients (RQ) to evaluate environmental risk (ERA) of this insecticide on aquatic ecosystem were calculated, indicating that P. innesi was more accurate than P. reticulata as ecotoxicological tool to evaluate cartap.

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          Most cited references28

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          About the oldest domesticates among fishes

          E Balon (2004)
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            Sex-biased movement in the guppy (Poecilia reticulata).

            The movement strategies of birds and mammals are often closely linked to their mating system, but few studies have examined the relationship between mating systems and movement in fishes. We examined the movement patterns of the guppy ( Poecilia reticulata) in the Arima river of Trinidad and predicted that sexual asymmetry in reproductive investment would result in male-biased movement. Since male guppies maximize their reproductive success by mating with as many different females as possible, there should be strong selection for males to move in search of mates. In agreement with our prediction, the percentage of fish that emigrated from release pools was higher for males than females (27.3% vs. 6.9%, respectively). Sex ratio was highly variable among pools and may influence a male's decision to emigrate or continue moving. We also detected a positive relationship between body length and the probability of emigration for males and a significant bias for upstream movement by males. Among the few females that did emigrate, a positive correlation was observed between body length and distance moved. Sex-biased movement appears to be related to mating systems in fishes, but the evidence is very limited. Given the implications for ecology, evolution, and conservation, future studies should explicitly address the influence of sex and mating systems on movement patterns.
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              Pesticide use in rice and rice–fish farms in the Mekong Delta, Vietnam

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                Author and article information

                Journal
                gayana
                Gayana (Concepción)
                Gayana (Concepc.)
                Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción (Concepción, , Chile )
                0717-652X
                0717-6538
                2007
                : 71
                : 2
                : 170-177
                Affiliations
                [01] Lima orgnameUniversidad Ricardo Palma orgdiv1Facultad de Ciencias Biológicas orgdiv2Laboratorio de Invertebrados Perú joseiannacone@ 123456yahoo.es
                [02] Lima orgnameUniversidad Nacional Federico Villarreal orgdiv1Facultad de Ciencias Naturales y Matemática orgdiv2Laboratorio de Ecofisiología Animal Perú ROCHI2980hotmail.com; marioli1379@ 123456hotmail.com
                Article
                S0717-65382007000200005 S0717-6538(07)07100205
                10.4067/S0717-65382007000200005
                832ee0e0-3c02-4a83-9789-5e845972ce1a

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 04 December 2006
                : 03 July 2007
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 27, Pages: 8
                Product

                SciELO Chile

                Categories
                Ambiente Acuático

                Poecilia,Paracheirodon,insecticida,cartap,Bioensayo,insecticide,Bioassay

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