Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell

Detalhes bibliográficos
Autor(a) principal: Coelho, Paulo Marcos Zectt
Data de Publicação: 1986
Outros Autores: Gerken, Silvia Elizabeth, Freitas, José Rabelo de
Tipo de documento: Artigo
Idioma: por
Título da fonte: Revista do Instituto de Medicina Tropical de São Paulo
Texto Completo: https://www.revistas.usp.br/rimtsp/article/view/87467
Resumo: A new method for labeling planorbidae to estimate the density and other parameters related with population studies, such as migration capacity, growth rates and biotic potential in natural habitats, is proposed. The snails are labelled with two small holes (2 mm diameter each) perforated in each side of the shell by means of a pointed metalic tool. After labeling, the snails are immediately put back in their habitat, at the same site where they were captured a few minutes ago. In all experiments carried out, the rates of labelled snails, recovered a week after labeling, varied from 14 to 18% and allowed to estimate the total population of B. glabrata, with 5 mm diameter or more. This method enables to evaluate juvenile population (with less than 5 mm), as well as to perform different marks. It is very simple/ease of handling; it does not require either specialized personnel or equipment and, on the other hand, it causes less trouble in the habitat than other procedures do.
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spelling Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell Avaliação de populações de planorbídeos, em habitats naturais, pelo método de perfuração da concha A new method for labeling planorbidae to estimate the density and other parameters related with population studies, such as migration capacity, growth rates and biotic potential in natural habitats, is proposed. The snails are labelled with two small holes (2 mm diameter each) perforated in each side of the shell by means of a pointed metalic tool. After labeling, the snails are immediately put back in their habitat, at the same site where they were captured a few minutes ago. In all experiments carried out, the rates of labelled snails, recovered a week after labeling, varied from 14 to 18% and allowed to estimate the total population of B. glabrata, with 5 mm diameter or more. This method enables to evaluate juvenile population (with less than 5 mm), as well as to perform different marks. It is very simple/ease of handling; it does not require either specialized personnel or equipment and, on the other hand, it causes less trouble in the habitat than other procedures do. Propõe-se um novo método de marcação de planorbídeos para determinação de densidade e de outros parâmetros pertinentes ao estudo de dinâmica de população, como capacidade de migração, taxas de crescimento e potencial biótico nos habitats naturais. Consiste em marcação através de dois furos de cerca de 2 mm de diâmetro de cada lado da concha em sua extremidade anterior, usando-se um estilete metálico. Após a marcação os caramujos são imediatamente reintroduzidos no habitat, em local correspondente ao da captura processada poucos minutos antes. Nos experimentos realizados, as taxas de caramujos marcados, recapturados uma semana após a marcação, variaram de 14 a 18% e permitiram calcular a população total de B. glabrata, de 5 mm de diâmetro ou mais. O método permite estimar também a população de jovens com menos de 5 mm e fazer marcações múltiplas. É muito simples, de fácil manejo, não exige equipamentos nem pessoal especializados e provoca menos impacto no ambiente do que outros métodos. Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo1986-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/rimtsp/article/view/87467Revista do Instituto de Medicina Tropical de São Paulo; Vol. 28 No. 2 (1986); 74-79Revista do Instituto de Medicina Tropical de São Paulo; Vol. 28 Núm. 2 (1986); 74-79Revista do Instituto de Medicina Tropical de São Paulo; v. 28 n. 2 (1986); 74-791678-99460036-4665reponame:Revista do Instituto de Medicina Tropical de São Pauloinstname:Instituto de Medicina Tropical (IMT)instacron:IMTporhttps://www.revistas.usp.br/rimtsp/article/view/87467/90425Copyright (c) 2018 Revista do Instituto de Medicina Tropical de São Pauloinfo:eu-repo/semantics/openAccessCoelho, Paulo Marcos ZecttGerken, Silvia ElizabethFreitas, José Rabelo de2014-11-07T18:33:33Zoai:revistas.usp.br:article/87467Revistahttp://www.revistas.usp.br/rimtsp/indexPUBhttps://www.revistas.usp.br/rimtsp/oai||revimtsp@usp.br1678-99460036-4665opendoar:2022-12-13T16:52:26.166297Revista do Instituto de Medicina Tropical de São Paulo - Instituto de Medicina Tropical (IMT)true
dc.title.none.fl_str_mv Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
Avaliação de populações de planorbídeos, em habitats naturais, pelo método de perfuração da concha
title Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
spellingShingle Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
Coelho, Paulo Marcos Zectt
title_short Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
title_full Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
title_fullStr Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
title_full_unstemmed Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
title_sort Evaluation of aquatic snail populations, under natural habitat conditions, by the method of perforation of the shell
author Coelho, Paulo Marcos Zectt
author_facet Coelho, Paulo Marcos Zectt
Gerken, Silvia Elizabeth
Freitas, José Rabelo de
author_role author
author2 Gerken, Silvia Elizabeth
Freitas, José Rabelo de
author2_role author
author
dc.contributor.author.fl_str_mv Coelho, Paulo Marcos Zectt
Gerken, Silvia Elizabeth
Freitas, José Rabelo de
description A new method for labeling planorbidae to estimate the density and other parameters related with population studies, such as migration capacity, growth rates and biotic potential in natural habitats, is proposed. The snails are labelled with two small holes (2 mm diameter each) perforated in each side of the shell by means of a pointed metalic tool. After labeling, the snails are immediately put back in their habitat, at the same site where they were captured a few minutes ago. In all experiments carried out, the rates of labelled snails, recovered a week after labeling, varied from 14 to 18% and allowed to estimate the total population of B. glabrata, with 5 mm diameter or more. This method enables to evaluate juvenile population (with less than 5 mm), as well as to perform different marks. It is very simple/ease of handling; it does not require either specialized personnel or equipment and, on the other hand, it causes less trouble in the habitat than other procedures do.
publishDate 1986
dc.date.none.fl_str_mv 1986-04-01
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/rimtsp/article/view/87467
url https://www.revistas.usp.br/rimtsp/article/view/87467
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://www.revistas.usp.br/rimtsp/article/view/87467/90425
dc.rights.driver.fl_str_mv Copyright (c) 2018 Revista do Instituto de Medicina Tropical de São Paulo
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2018 Revista do Instituto de Medicina Tropical de São Paulo
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo
publisher.none.fl_str_mv Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo
dc.source.none.fl_str_mv Revista do Instituto de Medicina Tropical de São Paulo; Vol. 28 No. 2 (1986); 74-79
Revista do Instituto de Medicina Tropical de São Paulo; Vol. 28 Núm. 2 (1986); 74-79
Revista do Instituto de Medicina Tropical de São Paulo; v. 28 n. 2 (1986); 74-79
1678-9946
0036-4665
reponame:Revista do Instituto de Medicina Tropical de São Paulo
instname:Instituto de Medicina Tropical (IMT)
instacron:IMT
instname_str Instituto de Medicina Tropical (IMT)
instacron_str IMT
institution IMT
reponame_str Revista do Instituto de Medicina Tropical de São Paulo
collection Revista do Instituto de Medicina Tropical de São Paulo
repository.name.fl_str_mv Revista do Instituto de Medicina Tropical de São Paulo - Instituto de Medicina Tropical (IMT)
repository.mail.fl_str_mv ||revimtsp@usp.br
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