Ecological Effects of Experimental Insecticide Applications on Invertebrates in Sahelian Temporary Ponds

Lahr, J.; Diallo, Aly; Gadji, Baba; Diouf, Papa Samba; Bedaux, J.J.M.; Badji, Aliou; Ndour, Khalifa B.; Andreasen, Jude E.; Straalen, Nico M. van

doi:10.1897/1551-5028(2000)019<1278:eeoeia>2.3.co;2

Cited by 4 publications

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“…The differences in toxicity to the same African Catfish, C. gariepinus exposed to cypermethrin in studies conducted within the same institution indicated an almost 7-fold increase in toxicity (96-hour LC 50 values) with 9.461 μg/L reported in the present study compared to 63 μgL -1 reported by Ayoola and Ajani (2008) . Deltamethrin affects the nervous system and has high toxicity for benthic arthropods and fishes, but is less toxic for mammals and birds ( Lahr et al, 2000 ). The 96-h LC 50 for exposure to Deltamethrin in the present study (21.24 μgL -1 ) was considerably higher than those recorded by Mestres and Mestres (1992) , who reported values for rainbow trout ( Salmo gairdneri ) as 0.39 μgL -1 ; common carp ( Cyprinus carpio ) 1.84 μgL -1 and Mozambique tilapia ( Sarotherodon mossambica ) as 3.50 μgL -1 .…”

Section: Discussionmentioning

confidence: 99%

Comparative assessment of the acute toxicity, haematological and genotoxic effects of ten commonly used pesticides on the African Catfish, Clarias gariepinus Burchell 1822

Amaeze

Komolafe

Salako

et al. 2020

Heliyon

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Freshwater fishes are faced with increasing threats due to intensification of agriculture. This study evaluated the haematological and genotoxic effects of exposure of the African Catfish, Clarias gariepinus to sublethal concentrations of commonly used pesticides in agricultural settings. The evaluated pesticides were abamectin, carbofuran, chlorpyrifos, cypermethrin, deltamethrin, dichlorvos, dimethoate, fipronil, lambda-cyhalothrin and paraquat. The fishes were initially exposed singly to the pesticides for 96 h periods to determine their LC 50 , followed by exposure to sublethal concentrations (1/100 th 96 h LC 50 ) over a 21 d period. In all cases, a control experiment with catfishes kept in dechlorinated municipal water was monitored simultaneously. The 96 h LC 50 values was found to vary widely from 2.043 μgL -1 (Lambda-cyhalothrin) to 10284.288 μgL -1 (Paraquat). Significant differences (P < 0.05) were observed between mean haematological parameters-WBC, RBC, HGB, HCT, MCH and MCHC in the exposed and control catfishes. More so, micronucleus and nuclear abnormalities occurred at significantly higher proportions in pesticide exposed catfishes. Holistic cradle to grave approach as well as fate analysis is required to mitigate the potential harmful effects of pesticides to fresh water fishes.

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Section: Discussionmentioning

confidence: 99%

Comparative assessment of the acute toxicity, haematological and genotoxic effects of ten commonly used pesticides on the African Catfish, Clarias gariepinus Burchell 1822

Amaeze

Komolafe

Salako

et al. 2020

Heliyon

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“…Further, difl ubenzuron has low toxicity to mammals, birds, fi sh, and earthworms (Marx 1977, Booth et al 1987, World Health Organization 1996. Although it is toxic to aquatic microcrustaceans (Hansen & Garton 1982, Lahr et al 2000, Lahr et al 2001, populations recover rapidly due to dissipation of difl ubenzuron in water (Schaefer & Dupras 1976, Booth et al 1987, Knuth & Heinis 1995, Mabury & Crosby 1996, World Health Organization 1996, Lahr et al 2000. Effects on aquatic microcrustacea depend on their developmental stage when exposed (Touart & Rao 1987).…”

Section: Reviewmentioning

confidence: 99%

A literature review and new observations on the use of diflubenzuron for control of locusts and grasshoppers throughout the world

Weiland¹,

Judge²,

Pels³

et al. 2002

Journal of Orthoptera Research

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“…The recovery from the pesticide after 9 weeks differed among the species seemingly in close accordance with the species’ life history (voltinism) (see also van den Brink et al. 1996 and Lahr et al. 2000).…”

Section: Discussionmentioning

confidence: 54%

“…Immigration may be an important external recovery mechanism in addition to internal recovery by reproduction. If populations are wiped out by a contaminant disturbance, dispersal is the sole mechanism for local recovery (Simberloff & Wilson 1969; Lahr et al. 2000).…”

Section: Introductionmentioning

confidence: 99%

Habitat isolation shapes the recovery of aquatic insect communities from a pesticide pulse

Trekels

Meutter

Stoks

2011

Journal of Applied Ecology

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Summary1. The role of spatial processes in ecotoxicology is largely ignored. Yet, together with speciesspecific sensitivities to the pollutant, spatial processes may determine community recovery and the resulting community composition after a pollution event. 2. We investigated the isolation-specific potential for internal recovery by reproduction and external recovery by dispersal after a pesticide pulse in experimental aquatic insect communities along an isolation gradient. 3. External recovery was important in the univoltine species and in a multivoltine species that went locally extinct but only when a source population was nearby. Internal recovery occurred in all multivoltine species and was unexpectedly stronger in more isolated communities, probably because of release from a dispersal-limited key predator. 4. As a result, community recovery and resulting changes in composition strongly depended on isolation and species differences in the potential for external recovery through dispersal and internal recovery through reproduction. 5. Synthesis and applications. Our results indicate that while the immediate impact of a toxicant on natural communities is shaped by species sensitivities, their recovery is primarily dependent on the degree of isolation. Risk assessment and the protection of communities under toxicant threat may improve greatly from considering the spatial context: isolated communities and communities with poor dispersers should receive extra protection to safeguard their member species. Ideally, land use planning should strive to remediate isolation of natural communities under threat in agricultural landscapes. Where this is not possible, spatial regulation of pesticide application may considerably improve protection of extant diversity.

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Ecological Effects of Experimental Insecticide Applications on Invertebrates in Sahelian Temporary Ponds

Cited by 4 publications

References 0 publications

Comparative assessment of the acute toxicity, haematological and genotoxic effects of ten commonly used pesticides on the African Catfish, Clarias gariepinus Burchell 1822

Comparative assessment of the acute toxicity, haematological and genotoxic effects of ten commonly used pesticides on the African Catfish, Clarias gariepinus Burchell 1822

A literature review and new observations on the use of diflubenzuron for control of locusts and grasshoppers throughout the world

Habitat isolation shapes the recovery of aquatic insect communities from a pesticide pulse

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