The Impact of Pesticides on Ricefield Vertebrates with Emphasis on Fish

Cagauan, A.G.

doi:10.1007/978-94-011-0647-4_8

Cited by 20 publications

(9 citation statements)

References 21 publications

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“…In contrast, applications of herbicides (especially butachlor) may have affected fishes via decreasing their food sources (algae and plankton) and habitat qualities. Herbicides can affect fishes directly (Moraes et al 2009;Tramboo et al 2011;Tu et al 2013), but the decomposition of weeds may also lead to deteriorating dissolved oxygen (DO) levels in the water (Murty 1986;Cagauan 1995). Serious adverse effects of abamectin on fishes (depending on chemical concentrations) have been noted in several studies (Ali et al 1997;Tišler & Eržen 2006;Sheeba Jasmine et al 2008;XiZhen & HongDa 2009).…”

Section: Patterns Of Abundance Of Fishesmentioning

confidence: 94%

“…High usage of pesticides may also partly explain the absence of needle fishes from most fields at PNA. Studies have found significant pesticide sensitivities by Oryzias species, and toxicity is often particularly high for small fishes (Cagauan 1995;González-Doncel et al 2004;Capkin et al 2006;Kim et al 2008). In contrast, applications of herbicides (especially butachlor) may have affected fishes via decreasing their food sources (algae and plankton) and habitat qualities.…”

Section: Patterns Of Abundance Of Fishesmentioning

confidence: 94%

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Aquatic faunal abundance and diversity in relation to synthetic and natural pesticide applications in rice fields of Central Thailand

Cochard

Maneepitak

Kumar

2014

International Journal of Biodiversity Science, Ecosystem Servic

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Despite wetland conversion to intensive rice production Central Thailand remains a center for wetland biodiversity in Southern Asia. Fauna inhabiting rice fields (many species perform important ecosystem services) are, however, increasingly threatened by pesticide uses. In Ayutthaya and Ang Thong Provinces 40 conventionally and 31 organically managed farms were visited to investigate how abundance and diversity of aquatic fauna in rice fields relate to pesticide regimes. In the dry and wet seasons fields were surveyed for plankton, aquatic macro-invertebrates, fishes, and waterfowl. Using multivariate statistics pesticide variables and biophysical field parameters (determined in a previous study) were assessed as potential predictors of abundance/diversity of faunal groups. Effects of pesticide regimes on aquatic fauna were nontrivial. Phytoplankton was lowered under exposures to herbicides and natural insecticides. Zooplankton (except amoeboids) was unaffected or increased on pesticide-exposed fields, probably suffering lower predation. Biophysical aspects partly explained abundance/diversity of aquatic insects, but abundance/diversity was generally higher on fields treated with natural rather than synthetic insecticides. Fishes and waterfowl tended to be less abundant on fields exposed to synthetic insecticides and herbicides. Detailed findings may interest agro-ecologists, medical entomologists, and conservation biologists. Further research incorporating wider landscape aspects and including pesticide-free reference sites is suggested.

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Section: Patterns Of Abundance Of Fishesmentioning

confidence: 94%

Section: Patterns Of Abundance Of Fishesmentioning

confidence: 94%

Aquatic faunal abundance and diversity in relation to synthetic and natural pesticide applications in rice fields of Central Thailand

Cochard

Maneepitak

Kumar

2014

International Journal of Biodiversity Science, Ecosystem Servic

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“…Plants are considered as the pillars of structurally diverse bioactive substances as many of them contain compounds that have insecticidal, pesticide and molluscicidal properties. These compounds are preferred over the synthetic chemical pesticides as they may result harmful residual footprints in the aquatic environment [1] . Besides, chemical piscicides have several environmental consequences variable with their relative persistency in aquatic ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Histopathological studies of tilapia (Oreochromis mossambicus) gastro-intestinal system exposed to Castor bean seed as piscicide compared with Mohua oil cake as haemotoxic agent

Mondal¹,

Das²

2020

J. Entomol. Zool. Stud.

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Histopathological manifestation of castor bean seed as fish toxicant upon gastro-intestinal system of Tilapia (Oreochromis mossambicus) was investigated parallel with mohua oil cake as haemotoxic piscicidal agent in outdoor experimental tanks. Castor seed bean was proved to be an effective piscicide with activity potential comparative with mohua oil cake though the mortality rate was higher and quicker in the later. As plant derived toxicant castor bean exhibited strong histopathological lessions in intestinal mucosa and liver whereas, mohua oil cake exhibited severe respiratory distress to the test fish. Significant reduction of dissolved oxygen and concurrent increase in BOD1 of water under both the piscicides aggravated the distress of the test fish.

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“…The more widely used pesticides are persistent, and their toxicity is of a broad spectrum type. Most of these pesticides are extremely toxic to fish and other aquatic organisms, and they are used in sufficiently high quantities to pollute waters, as is indicated by residues in fish (Cagauan 1990).…”

Section: Introductionmentioning

confidence: 99%

Effect of the synthetic pyrethroid Deltamethrin and the neem-based pesticide Achook on the reproductive ability of zebrafish, Danio rerio (Cyprinidae)

Sharma¹,

Ansari²

2010

Archives of Polish Fisheries

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Abstract. In the present research, both male and female zebrafish, Danio rerio (Hamilton), were exposed to 96-h LC5 values of Deltamethrin (0.016 µg dm -3 ) and Achook (0.025 µg dm -3 ) for three months. The fish were then returned to normal water and allowed to breed to permit observations of fecundity and hatchability. The results show significant reductions in fecundity and hatchability in comparison to the control group. Fecundity was reduced by 54.12% in the fish treated with Deltamethrin and by 17.81% in those treated with Achook. Significant decreases in hatchability of up to 49.7% were noted in the Deltamethrin group and of 36.9% in the Achook treated fish. The number of unhatched/dead eggs increased significantly (P < 0.05 for each case). It was concluded that low concentrations (96-h LC5 values) of both pesticides can have a significant impact on the reproduction of zebrafish.

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The Impact of Pesticides on Ricefield Vertebrates with Emphasis on Fish

Cited by 20 publications

References 21 publications

Aquatic faunal abundance and diversity in relation to synthetic and natural pesticide applications in rice fields of Central Thailand

Aquatic faunal abundance and diversity in relation to synthetic and natural pesticide applications in rice fields of Central Thailand

Histopathological studies of tilapia (Oreochromis mossambicus) gastro-intestinal system exposed to Castor bean seed as piscicide compared with Mohua oil cake as haemotoxic agent

Effect of the synthetic pyrethroid Deltamethrin and the neem-based pesticide Achook on the reproductive ability of zebrafish, Danio rerio (Cyprinidae)

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