Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility

Detalhes bibliográficos
Autor(a) principal: Kawazoe, Urara
Data de Publicação: 1977
Tipo de documento: Artigo
Idioma: por
Título da fonte: Revista de Saúde Pública
Texto Completo: https://www.revistas.usp.br/rsp/article/view/22821
Resumo: The fecundity (ratio egg-masses per snail, eggs per snail and eggs per egg-mass) and the fertility (hatchability and viability of eggs) of Biomphalaria glabrata and Biomphalaria tenagophila were compared during one year, in the laboratory. The average of eggs per egg-mass was significantly higher in B. glabrata (19.9) than in B. tenagophila (16.2) and both species showed highest fecundity during April. The influence of temperature was very small. The fecundity defined as egg-mass per snail per day was greater in B. glabrata (0.65) than in B. tenagophila (0.56). The same was verified in the ratio eggs per snail per day: the average was 13.4 in B. glabrata and 9.9 in B. tenagophila. Considering the fertility as percentage of snail hatchability, B. glabrata showed an average of 95.8 and B. tenagophila 90.5%, the difference being significant, at the 5% level. The greatest hatchability rate in B. glabrata was observed during November-January (98.0); in B. tenagophila, during October-November (95.0%). Seasonal rhythm and influence of seasonal variation of temperature were not observed.
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spelling Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility Alguns aspectos da biologia de Biomphalaria glabrata (Say, 1818) e Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundidade e fertilidade Planorbídeos^i1^sbioloBiomphalaria glabrataBiomphalaria tenagophilaFecundidadeFertilidadePlanorbidae^i2^sbiolBiomphalaria glabrataBiomphalaria tenagophilaFecundityFertility The fecundity (ratio egg-masses per snail, eggs per snail and eggs per egg-mass) and the fertility (hatchability and viability of eggs) of Biomphalaria glabrata and Biomphalaria tenagophila were compared during one year, in the laboratory. The average of eggs per egg-mass was significantly higher in B. glabrata (19.9) than in B. tenagophila (16.2) and both species showed highest fecundity during April. The influence of temperature was very small. The fecundity defined as egg-mass per snail per day was greater in B. glabrata (0.65) than in B. tenagophila (0.56). The same was verified in the ratio eggs per snail per day: the average was 13.4 in B. glabrata and 9.9 in B. tenagophila. Considering the fertility as percentage of snail hatchability, B. glabrata showed an average of 95.8 and B. tenagophila 90.5%, the difference being significant, at the 5% level. The greatest hatchability rate in B. glabrata was observed during November-January (98.0); in B. tenagophila, during October-November (95.0%). Seasonal rhythm and influence of seasonal variation of temperature were not observed. Foi realizada, comparativamente, a avaliação do número de cápsulas ovíferas e ovos por caramujo e do número de ovos por desova (fecundidade) e a verificação da taxa de eclosão e de ovos férteis (fertilidade) de Biomphalaria glabrata e Biomphalaria tenagophila, no período de um ano, em condições de laboratório. Verificou-se que a média do número de ovos por desova foi significativamente maior em B. glabrata (19,9) do que em B. tenagophila (16,2), constatando-se que ambas as espécies apresentavam maior fecundidade no mês de abril, embora os fatores ambientes tenham influído pouco no parâmetro em questão. A fecundidade traduzida pelo número de desovas por caramujo-dia, mostrou-se maior em B. glabrata (0,65) do que em B. tenagophila (0,56), o mesmo acontecendo em relação ao número de ovos por caramujo-dia pois B. glabrata apresentou média de 13,4 e B. tenagophila média de 9,9. Considerando-se a fertilidade como a percentagem de eclosão dos caramujos, B. glabrata apresentou média de 95,8% e B. tenagophila a média de 90,5% de eclosão, sendo esta diferença significativa ao nível de 5%. As taxas mais elevadas de eclosão em B. glabrata foram verificadas nos meses de nomais elevadas de eclosão em B. glabrata foram verificadas nos meses de novembro a janeiro (98,0%) e em B. tenagophila nos meses outubro-novembro (95,0%) embora não tenham sido observados ritmo sazonal nem influência da temperatura na eclosão dos planorbídeos estudados. Universidade de São Paulo. Faculdade de Saúde Pública1977-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/rsp/article/view/2282110.1590/S0034-89101977000100005Revista de Saúde Pública; Vol. 11 No. 1 (1977); 47-64 Revista de Saúde Pública; Vol. 11 Núm. 1 (1977); 47-64 Revista de Saúde Pública; v. 11 n. 1 (1977); 47-64 1518-87870034-8910reponame:Revista de Saúde Públicainstname:Universidade de São Paulo (USP)instacron:USPporhttps://www.revistas.usp.br/rsp/article/view/22821/24845Copyright (c) 2017 Revista de Saúde Públicainfo:eu-repo/semantics/openAccessKawazoe, Urara2012-05-28T13:58:47Zoai:revistas.usp.br:article/22821Revistahttps://www.revistas.usp.br/rsp/indexONGhttps://www.revistas.usp.br/rsp/oairevsp@org.usp.br||revsp1@usp.br1518-87870034-8910opendoar:2012-05-28T13:58:47Revista de Saúde Pública - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
Alguns aspectos da biologia de Biomphalaria glabrata (Say, 1818) e Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundidade e fertilidade
title Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
spellingShingle Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
Kawazoe, Urara
Planorbídeos^i1^sbiolo
Biomphalaria glabrata
Biomphalaria tenagophila
Fecundidade
Fertilidade
Planorbidae^i2^sbiol
Biomphalaria glabrata
Biomphalaria tenagophila
Fecundity
Fertility
title_short Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
title_full Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
title_fullStr Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
title_full_unstemmed Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
title_sort Some biological aspects of Biomphalaria glabrata (Say, 1818) and Biomphalaria tenagophila (D'Orbigny, 1835) (Pulmonata, planorbidae): II - Fecundity and fertility
author Kawazoe, Urara
author_facet Kawazoe, Urara
author_role author
dc.contributor.author.fl_str_mv Kawazoe, Urara
dc.subject.por.fl_str_mv Planorbídeos^i1^sbiolo
Biomphalaria glabrata
Biomphalaria tenagophila
Fecundidade
Fertilidade
Planorbidae^i2^sbiol
Biomphalaria glabrata
Biomphalaria tenagophila
Fecundity
Fertility
topic Planorbídeos^i1^sbiolo
Biomphalaria glabrata
Biomphalaria tenagophila
Fecundidade
Fertilidade
Planorbidae^i2^sbiol
Biomphalaria glabrata
Biomphalaria tenagophila
Fecundity
Fertility
description The fecundity (ratio egg-masses per snail, eggs per snail and eggs per egg-mass) and the fertility (hatchability and viability of eggs) of Biomphalaria glabrata and Biomphalaria tenagophila were compared during one year, in the laboratory. The average of eggs per egg-mass was significantly higher in B. glabrata (19.9) than in B. tenagophila (16.2) and both species showed highest fecundity during April. The influence of temperature was very small. The fecundity defined as egg-mass per snail per day was greater in B. glabrata (0.65) than in B. tenagophila (0.56). The same was verified in the ratio eggs per snail per day: the average was 13.4 in B. glabrata and 9.9 in B. tenagophila. Considering the fertility as percentage of snail hatchability, B. glabrata showed an average of 95.8 and B. tenagophila 90.5%, the difference being significant, at the 5% level. The greatest hatchability rate in B. glabrata was observed during November-January (98.0); in B. tenagophila, during October-November (95.0%). Seasonal rhythm and influence of seasonal variation of temperature were not observed.
publishDate 1977
dc.date.none.fl_str_mv 1977-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/rsp/article/view/22821
10.1590/S0034-89101977000100005
url https://www.revistas.usp.br/rsp/article/view/22821
identifier_str_mv 10.1590/S0034-89101977000100005
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://www.revistas.usp.br/rsp/article/view/22821/24845
dc.rights.driver.fl_str_mv Copyright (c) 2017 Revista de Saúde Pública
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Revista de Saúde Pública
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Saúde Pública
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Saúde Pública
dc.source.none.fl_str_mv Revista de Saúde Pública; Vol. 11 No. 1 (1977); 47-64
Revista de Saúde Pública; Vol. 11 Núm. 1 (1977); 47-64
Revista de Saúde Pública; v. 11 n. 1 (1977); 47-64
1518-8787
0034-8910
reponame:Revista de Saúde Pública
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Revista de Saúde Pública
collection Revista de Saúde Pública
repository.name.fl_str_mv Revista de Saúde Pública - Universidade de São Paulo (USP)
repository.mail.fl_str_mv revsp@org.usp.br||revsp1@usp.br
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