| Author | Paraense, W. Lobato | |
| Access date | 2020-09-25T20:14:56Z | |
| Available date | 2020-09-25T20:14:56Z | |
| Document date | 1993 | |
| Citation | PARAENSE, W. Lobato. Egg-laying induced by insemination in Biomphalaria snails. Memórias do Instituto Oswaldo Cruz, Rio de Janeiro, v. 88, n. 4, p. 551-555, Oct./Dec. 1993. | pt_BR |
| ISSN | 0074-0206 | pt_BR |
| URI | https://www.arca.fiocruz.br/handle/icict/43629 | |
| Language | eng | pt_BR |
| Publisher | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz | pt_BR |
| Rights | open access | |
| Subject in Portuguese | Postura de ovos | pt_BR |
| Subject in Portuguese | Indução | pt_BR |
| Subject in Portuguese | Inseminação | pt_BR |
| Subject in Portuguese | Caramujos Biomphalaria | pt_BR |
| Title | Egg-laying induced by insemination in Biomphalaria snails | pt_BR |
| Type | Article | |
| DOI | 10.1590/S0074-02761993000400009 | |
| Abstract | Contrasting with many populations of Biomphalaria glabrata and B. straminea previously dealt with in this laboratory, which when reared in isolation deposit self-fertilized eggs without apparent restraint, isolated individuals of the former species from São Sebastião do Passé, Bahia state, and of the latter from Porto Alegre, Rio Grande do Sul state, show a high degree of self-sterility, laying egg capsules with a few usually abortive, rarely viable egg cells, or just jellylike masses without egg cells. When two individuals are paired they readily copulate, usually withing 24 hr deposit one of more egg capsules containing many eggs, and egg-laying continues up to exhaustion of stored allosperm. So far this aspect of reproductive biology has been only observed in a number of populations of the planorbid species Helisoma duryi, and should be viewed as a populational rather than specific characteristic. Since sterility is not overcome by courtship, copulation and insemination by individuals of a different species, the stimulating factor that causes ovulation in the studied self-sterile individuals is considered to be present in the conspecific allosperm. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Malacologia. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Subject | Egg-laying induced | pt_BR |
| Subject | Insemination | pt_BR |
| Subject | Biomphalaria snails | pt_BR |
| e-ISSN | 1678-8060 | |
