Impact of some environmental factors on distribution of certain vector snails in five Egyptian Governorates

Saad, A. O. M.; Mostafa, Bayaumy B.; Azzam, Ahmed M.; El-Magd, Samah

doi:10.21608/ejabf.2012.2111

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…Njoku (2011) claimed that conductivity is a limiting factor to snail growth and abundance as snail population was high in medium with conductivity range 50-110 μmhos than in medium with lower ranges. These results are in line with that obtained by El-Kady et al (2000); Saad et al (2012) and Abdel-Wareth (2014).…”

Section: Discussionsupporting

confidence: 93%

“…B. alexandrina, B. truncatus, L. natalensis, L. carinatus and C. bulimoides) was recorded in March and April (spring season) and in October and November (Autumn season) from irrigation and drainage canals in El-Ismailia governorate. Moreover, Kloos et al (2004);Owojori et al (2006); Ntonifor and Ajayi (2007);El-Khayat et al (2011); Saad et al (2012) and Abd El-Wakeil et al (2013) were supported these findings.…”

Section: Discussionmentioning

confidence: 83%

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Bioaccumulation of heavy metals in freshwater snails in relation to lining of water courses in Egypt.

Kader

Ismail

Abdel-Motleb

et al. 2016

Journal of Bioscience and Applied Research

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The present study was aimed to determine the heavy metal concentrations in whole body of fresh water snails in relation to lining of water courses in two governorates (Behaira (Nubaria) and Giza) Through four successive seasons from Septemper 2013, to October 2014. The obtained results indicated that the electrical conductivity (EC) and iron metal (Fe) showed the highest values and generally the physicochemical measurements indicated that no significant difference between the two tested habitats, however, the conductivity of water in lined water bodies was lower than those of unlined ones. The present study recorded 14 species of snails belonging to class Gastropoda; these species belonged to Pulmonate and Prosobranch snails. The density of all recorded Pulmonate snails in lined sites were lower than those in unlined ones. On the other hand, the abundance of Prosobranch snails was higher in numbers in the lined sites than those in the unlined. In Nubaria the most abundant snails were Melanoides tuberculata and Theodoxus niloticus and exhibited their maximum percentages in the lined (82.15%) and unlined (72.34%) sites during summer, respectively. While, in Giza Governorate Physa acuta snails had the highest percentages among collected snails approximately at all seasons, and exhibited its maximum percentages during spring in lined (90.22%) and unlined sites (85.38%). Correlations between physicochemical parameters and the collected snails, revealed that there were different negative or positive correlations depending on the sites of investigation. The bioconcentration factor of heavy metals in snail's soft tissues at the investigated in lined and unlined sites compared to the content of the metals (Cd, Cu, Fe, Pb and Zinc) in the water showed high variation in BCF values depending on the type of metal and the snail. Generally P. acuta (7626.95μg.g-1 DW for Fe) and H. duryi (8787.10 μg.g-1 DW for Cu) were the highest snails of accumulated metal contents in the tested sites of the two surveyed governorates, respectively.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 83%

Bioaccumulation of heavy metals in freshwater snails in relation to lining of water courses in Egypt.

Kader

Ismail

Abdel-Motleb

et al. 2016

Journal of Bioscience and Applied Research

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“…The snails can live in a wide range of mineral content in water till certain limiting [30]. On the contrary, it was found that the highest numbers of B. truncatus snails were found under low dissolved salts (100-300 ppm) while B. alexandrina snails were obtained from a range of 601-1000 ppm [31].…”

Section: Discussionmentioning

confidence: 99%

Freshwater Snail Distribution Related to Physicochemical Parameters and Aquatic Macrophytes in Giza and Kafr El-Shiekh Governorates, Egypt

Deeb¹,

El-Shenawy²,

Soliman³

et al. 2017

Int J Vet Sci Res

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A fi eld work was conducted to study the density of the freshwater snail in relation to the vegetation cover as well as the physical and chemical properties in different watercourses. Two sites were selected in Giza governorate while, three sites were selected at Kafr El-Shiekh governorate. Water temperature, conductivity, total hardness, and pH were measured in the selected sites as well as bisphenol A (BPA) levels. Snail sampling was carried out and all types of macrophytes found in each site were collected, identifi ed and coverage. Nine snails species namely Biomphalaria alexandrina, Physa acuta, Planorbis planorbis, Lymnaea natalensis, Bulinus truncates, Bellamya unicolor, Melanoides tuberculata, Helisoma duryi and Lanistes carinatus were identifi ed. B. alexandrina was the most enumeration of snail species. The percentage of total snail species (75.47 %) was recorded at 28 °C as compared to 5.86 % recorded at 34 °C. Five species of aquatic vegetation were identifi ed, two of them correlated positively and signifi cantly with various snail species. Sites in which snails associated with macrophytes were characterized with higher ranges of chemicals, dissolved oxygen, and conductivity. In conclusion, the most important of the associating vegetation was L. gibba which correlated with B. alexandrina and served as an indicator plant.

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“…8). However, Saad et al (2012) indicated that B. alexandrina snails were found at wide TDS range of (601-1000 ppm). While, Goncalves et al (2017) indicated that Cu 2+ dissolution with inverse salinity dependence, the toxic effects observed for CuO NPs might be due to intrinsic toxicity mechanisms related to the nanoform and their aggregation plays a key role in their toxicity.…”

Section: Effect Of Some Environmental Factors On Molluscicidal Activimentioning

confidence: 97%

Improvement molluscicidal activity of Anagalis arvensis extracted by copper oxide nanoparticles against Biomphalaria alexandrina snails

Saad¹,

Azzam²,

Mostafa³

et al. 2019

Egypt. J. of Aquatic Biolo. and Fish.

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Keywords: B.alexandrina Anagalis arvensisCopper oxide Molluscicide Nanoparticles Histopathology Nanotechnology has received more attention in the field of control of intermediate hosts. In the present study, copper nanoparticles were fabricated and characterized using scanning electron microscopy (SEM), transmission electron microscope (TEM), x-ray fluorescence (XRF) and fourier transform infrared (FTIR). Improvement of the molluscicidal activity of Anagalis arvensis ethanolic extract was made using CuO NPs by forming plant nanocomposite (ACuO NC). The results showed that ACuO NC has high molluscicidal activity against B. alexandrina snails; recording LC 50 and LC 90 were 1.76 and 3.16 ppm, respectively. Also, biochemical parameters (Total protein, ALT, AST and ALP) revealed highly significant changes in treated snails with sublethal concentrations (LC 10 and LC 25 ) of ACuO NC. However, histopathological changes occurred in the hermaphrodite glands of snails exposed to these concentrations of nanocomposite were detected, where, the ova and sperms degenerated and there were losses of connective tissues between acini. ACuO NC was more safety when tested against the biological indicator Daphnia magna. These observations prove that ACuO NC has potent molluscicidal activity against the intermediate hosts of Schistosoma mansoni with more safety for aquatic environment.

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Impact of some environmental factors on distribution of certain vector snails in five Egyptian Governorates

Cited by 3 publications

References 4 publications

Bioaccumulation of heavy metals in freshwater snails in relation to lining of water courses in Egypt.

Bioaccumulation of heavy metals in freshwater snails in relation to lining of water courses in Egypt.

Freshwater Snail Distribution Related to Physicochemical Parameters and Aquatic Macrophytes in Giza and Kafr El-Shiekh Governorates, Egypt

Improvement molluscicidal activity of Anagalis arvensis extracted by copper oxide nanoparticles against Biomphalaria alexandrina snails

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