In Vivo Changes in the Activity of Gill ATPases, Muscle Cell Volume, and Plasma and Cellular Ionic Concentration of the African Catfish, Clarias gariepinus Induced by Atrazine or DDT at Different Sublethal Concentrations

Assem, H.; Elsaeidy, I.; Abo-Hegab, S.

doi:10.4197/mar.6-1.10

Cited by 2 publications

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“…Behavioural changes are among the most sensitive indicators of potential toxic effects of toxicants (Banaee et al 2011). The stressful behaviour observed in C. gariepinus was higher as concentrations of both pesticides increased, which may be due to (Assem, Elsaeidy, and Abo-Hegab 1995) and C. carpio (Ramesh, Srinivasan, and Saravanan 2009) exposed to atrazine, but higher than 0.38 and 1.25 mg l −1 reported for O. niloticus exposed to chloracetaliinde herbicides, alachlnor (Peebua et al 2007) and butachlor (Nwani et al 2013), respectively. The toxicity of compounds to organisms has however been known to be dependent on concentration, pH, temperature, developmental stages and exposure periods (Pandey et al 2011).…”

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confidence: 86%

Comparative evaluation of the acute toxicity and behavioural changes inClarias gariepinusfollowing exposure to dichlorvos and primextra pesticides

Nwani

Ifo

Ejere

et al. 2014

Zoology and Ecology

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Dichlorvos is an organophosphate pesticide used for the control of pests in crops and stored products, while primextra is a commercial herbicide formulation generally used in agriculture for weed control. The present study was designed to evaluate and compare the acute toxicity of dichlorvos and primextra pesticides and assess their effects on mortality and behavioural changes of Clarias gariepinus juveniles. The 24, 48, 72 and 96 h LC 50 of dichlorvos were 6.06, 4.96, 1.65 and 1.29 mg l −1 , while those of primextra were 9.34, 6.50, 5.41 and 4.67 mg l −1 , respectively. The safe levels estimated by different methods varied from 1.29 × 10 −1 to 1.29 × 10 −5 mg l −1 in dichlorvos and from 4.67 × 10 −1 to 4.67 × 10 −5 mg l −1 in primextra. Behavioural changes, such as hyperactivity, gulping of air, skin discoloration, loss of balance, convulsion, erratic swimming and mucous secretions, were observed in fish exposed to both pesticides. Our study indicated that dichlorvos (96 h LC 50 = 1.29 mg l −1 ) was more toxic to C. gariepinus compared with primextra (96 h LC 50 = 4.67 mg l −1 ). The use of these pesticides in both terrestrial ecosystems and aquatic environments should be subject to strict control and monitoring to prevent potential ecotoxicological hazards to aquatic lives.Darbo tikslas -įvertinti ir palyginti dichlofoso ir Primextra ūminį toksiškumą bei poveikį Clarias gariepinus jauniklių mirtingumui ir elgsenos pokyčiams. Dichlofosas -organinis fosforo junginys, naudojamas vabzdžių naikinimui laukuose ir sandėliuose, Primextra -herbicidas, dažniausiai naudojamas piktžolių naikinimui žemės ūkyje. Paveikus žuvis tiriamąja medžiaga 24, 48, 72 ir 96 valandas, dichlofoso LC 50 koncentracija buvo 6,06, 4,96, 1,65 ir 1,29 mg l −1 , Primextra LC 50 koncentracija -9,34, 6,50, 5,41 ir 4,67 mg l −1 atitinkamai. C. gariepinus saugios dichlofoso koncentracijos buvo nuo 1,29 × 10 −1 iki 1,29 × 10 −5 mg l −1 , Primextra -nuo 4,67 × 10 −1 iki 4,67 × 10 −5 mg l −1 . Abiem medžiagomis paveiktoms žuvims buvo būdingi elgsenos pokyčiai: hiperaktyvumas, žiopčiojimas ryjant orą, odos spalvos pakitimai, pusiausvyros sutrikimai, konvulsijos, chaotiškas plaukimas ir gleivingos išskyros. Šis tyrimas parodė, kad dichlofosas (96 val. LC 50 = 1,29 mg l −1 ) C. gariepinus yra toksiškesnis negu Primextra (96 val. LC 50 = 4,67 mg l −1 ). Dichlofoso ir Primextra naudojimas turi būti griežtai kontroliuojamas dėl galimo ekotoksikologinio poveikio vandens gyvūnams.

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