SciELO - Scientific Electronic Library Online

 
vol.81 issue2Redescribe the male and describe the female of Lutzomyia (Helcocyrtomyia) peresi (Mangabeira, 1942)RS virus diagnosis: comparison of isolation, immunofluorescence and enzyme immunoassay author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Memórias do Instituto Oswaldo Cruz

Print version ISSN 0074-0276On-line version ISSN 1678-8060

Mem. Inst. Oswaldo Cruz vol.81 no.2 Rio de Janeiro Apr./June. 1986

http://dx.doi.org/10.1590/S0074-02761986000200012 

Weight loss and survival of Biomphalaria Glabrata deprived of water

Marc Vianey-Liaud1 

Félix Lancastre2 

Université des Sciences et Techniques du Languedoc, Laboratoire d'Ichthyologie et de Parasitologie Générale, Montpellier, France

Université P. et M Curie, Faculté de Médecine Saint-Antoine, Laboratoire de PArasitologie, Paris, France

ABSTRACT

Immature and mature Biomphalaria glabrata are kept out of water at relative humidities varying from 0 to 100%. When snails are submitted to a saturated atmosphere, they show a slow weight loss and survival may be long. If relative humidity (RH) decreases, weight loss becomes important and survival is short. A reduced RH (0 to 65%) produces similar effects. During desiccation, fasting has no noticeable effect; survival depends essentially on weight loss.

Key words: Biomphalaria glabrata; desiccation; weight loss; survival

RESUMO

Biomphalaria glabrata maduros ou imaturos são mantidos fora da água, variando a umidade de 0 a 100%. Quando caramujos são submetidos a uma atmosfera saturada, sofrem uma lenta perda de peso e a sobrevivência pode ser longa. Se a umidade relativa decresce, a perda de peso será importante e a sobrevida será abreviada. Uma umidade relativa de 0 a 65% pode produzir efeitos similares. Durante a dessecação, a privação de alimento não tem efeito notável, a sobrevivência dependendo essencialmente da perda de peso.

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License