Influence de quelques facteurs du milieu sur la fécondité de <i>Biomphalaria glabrata</i> (Say, 1818) (Mollusca, Pulmonata) dans les conditions du laboratoire

Lévêque, Christian; Pointier, Jean‐Pierre; Toffart, J L

doi:10.1051/parasite/1978534393

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…It has been demonstrated that high Mg: Ca ratios have an adverse effect on B. pfeifferi and B. glabrata (Harrison, Nduku & Hooper 1966;Nduku & Harrison 1976, 1980aLeveque, Pointier & Toffart 1978). It has been demonstrated that high Mg: Ca ratios have an adverse effect on B. pfeifferi and B. glabrata (Harrison, Nduku & Hooper 1966;Nduku & Harrison 1976, 1980aLeveque, Pointier & Toffart 1978).…”

Section: Discussionmentioning

confidence: 99%

Effect of Calcium Concentration on Growth and Egg Laying of Helisoma duryi, Biomphalaria alexandrina, B. camerunensis and Bulinus truncatus (Gastropoda: Planorbidae)

Madsen¹

1987

The Journal of Applied Ecology

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. This content downloaded from 137.189. SUMMARY(1) Helisoma duryi is a potential competitor of the intermediate hosts of schistosomes and has been suggested as a candidate for biological control of schistosomiasis. In order to evaluate the potential of H. duryi to establish populations in schistosomiasis endemic areas, this study compared the response of H. duryi to calcium concentrations ranging from 0 00 to 2 00 mm with the response of some representative species of the intermediate hosts, namely Biomphalaria alexandrine, B. camerunensis and Bulinus truncatus.(2) Growth increased with calcium concentration up to 0 25-050 mm for H. duryi, B. alexandrine and B. truncatus; while for B. camerunensis, concentrations above 0 06 mm did not result in significantly increased growth over 10 weeks. The net reproductive rate after 10 weeks also increased with calcium concentration up to 0 13-0 25 mm in all the species except B. camerunensis, which showed smaller differences between the calcium treatments.(3) All four species formed heavier shells at higher calcium concentrations.(4) H. duryi caused greater calcium decrements in all test media than the other three species. At the lower calcium concentrations, H. duryi appeared to extract calcium more efficiently than the other three species.(5) Hatching of egg masses was not affected by the calcium concentration, except in the 0 00 mm treatment for B. alexandrine and B. camerunensis. Survival of newly hatched snails for 1 week was high and was only reduced in media with the lowest calcium concentrations.

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Section: Discussionmentioning

confidence: 99%

Effect of Calcium Concentration on Growth and Egg Laying of Helisoma duryi, Biomphalaria alexandrina, B. camerunensis and Bulinus truncatus (Gastropoda: Planorbidae)

Madsen¹

1987

The Journal of Applied Ecology

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“…The high calcium levels of the predominantly limestone environment of Virgem das Graças appear to promote large B. glabrata populations in wells and springs. Calcium has been associated with high fecundity of B. glabrata (Lévesque et al 1978) and shell development (Brown 1994).…”

Section: Discussionmentioning

confidence: 99%

Distribution and Schistosoma mansoni infection of Biomphalaria glabrata in different habitats in a rural area in the Jequitinhonha Valley, Minas Gerais, Brazil: environmental and epidemiological aspects

Kloos¹,

Passos

LoVerde

et al. 2004

Mem. Inst. Oswaldo Cruz

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“…Os 3 (500 e 1000 ppm), no experimento I e MgCO 3 , MgCO 3 + latossolo (500 e 1000 ppm), Mg e Mg + latossolo (1000 ppm) no experimento II, quando comparados os períodos de adaptação com os de exposição.…”

Section: Experimento IIunclassified

“…For each solution, 10 adult snails from Pampulha, Belo Horizonte-MG (Brazil), reared in the laboratory, were used. In experiment I solutions, in dechlorinated water, of magnesium (Mg), magnesium chloride (MgCl 2 3 + latosoil, always at concentrations of 500 and 1000 ppm. The snails were kept in dechlorinate water for an adaptation period of two weeks.…”

Section: Experimento IImentioning

confidence: 99%

Influência do magnésio metálico e diferentes sais de magnésio em desovas de Biomphalaria glabrata (Say, 1818)

Mendes

Katz

1983

Rev. Saúde Pública

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N. Influência do magnésio metálico e diferentes sais de magnésio em desovas de Biomphalaria glabrata (Say, 1818 + latossolo, sempre nas concentrações de 500 e 1.000 ppm. Durante duas semanas os planorbídeos permaneceram em água para adaptação; em seguida, por quatro semanas em exposição com as soluções testadas e, posteriormente, em água por mais duas semanas para recuperação. A cada sete dias as desovas eram contadas, eliminadas e as soluções renovadas. Foi observado que as soluções de Mg e MgCO 3 , isoladamente ou associada ao latossolo, produziram uma diminuição significativa do número de desovas dos caramujos, mas não parada completa de oviposição, quando comparados os períodos de adaptação com os de exposição. As soluções de Mg e MgCO 3 não devem ser consideradas como produtos promissores para o controle da população de B. glabrata, em virtude da diminuição das desovas só terem sido observadas quando foram utilizadas concentrações muito altas.

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Influence de quelques facteurs du milieu sur la fécondité de Biomphalaria glabrata (Say, 1818) (Mollusca, Pulmonata) dans les conditions du laboratoire

Abstract: Influence de quelques facteurs du milieu sur la fécondité de Biomphalaria glabrata (Say, 1818) (Mollusca, Pulmonata) dans les conditions du laboratoire par C. LEVEQUE *, J.

Cited by 6 publications

References 5 publications

Effect of Calcium Concentration on Growth and Egg Laying of Helisoma duryi, Biomphalaria alexandrina, B. camerunensis and Bulinus truncatus (Gastropoda: Planorbidae)

Effect of Calcium Concentration on Growth and Egg Laying of Helisoma duryi, Biomphalaria alexandrina, B. camerunensis and Bulinus truncatus (Gastropoda: Planorbidae)

Distribution and Schistosoma mansoni infection of Biomphalaria glabrata in different habitats in a rural area in the Jequitinhonha Valley, Minas Gerais, Brazil: environmental and epidemiological aspects

Influência do magnésio metálico e diferentes sais de magnésio em desovas de Biomphalaria glabrata (Say, 1818)

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