Electric signals for separation of earthworms (Eudrilus eugeniæ)

Detalhes bibliográficos
Autor(a) principal: Moraes,Maria J. de
Data de Publicação: 2012
Outros Autores: Oliveira Filho,Delly, Martins,José H., Santos,Luiz C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012001000015
Resumo: The worm Eudrilus eugeniæ is a species adapted to tropical climates and is highly demanded as fishing bait, therefore possessing high economic value. Separation of worms from humus is typically performed by manual, mechanical, behavioral and electric methods. The objective of this study was to characterize electric pulses for separation of worms (Eudrilus eugeniæ) from humus. To determine separation efficiency of worms from humus, a controlled pulse generator was used with frequencies of 1 and 5 Hz, voltages of 100 and 200 V, peak widths of 2, 3 and 4 x 10-3 s and exposure times of 15 and 30 min. The electrical pulse characteristics which resulted in greatest separation efficiency were: 1 Hz, 2 x 10-3 s and 200 V; and the maximum displacement index was 80% which occurred under these conditions. The survival index was 100% for the pulses which resulted in the greatest separation indices.
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spelling Electric signals for separation of earthworms (Eudrilus eugeniæ)vermiculturevermicompostingelectric stimulationThe worm Eudrilus eugeniæ is a species adapted to tropical climates and is highly demanded as fishing bait, therefore possessing high economic value. Separation of worms from humus is typically performed by manual, mechanical, behavioral and electric methods. The objective of this study was to characterize electric pulses for separation of worms (Eudrilus eugeniæ) from humus. To determine separation efficiency of worms from humus, a controlled pulse generator was used with frequencies of 1 and 5 Hz, voltages of 100 and 200 V, peak widths of 2, 3 and 4 x 10-3 s and exposure times of 15 and 30 min. The electrical pulse characteristics which resulted in greatest separation efficiency were: 1 Hz, 2 x 10-3 s and 200 V; and the maximum displacement index was 80% which occurred under these conditions. The survival index was 100% for the pulses which resulted in the greatest separation indices.Departamento de Engenharia Agrícola - UFCG2012-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012001000015Revista Brasileira de Engenharia Agrícola e Ambiental v.16 n.10 2012reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/S1415-43662012001000015info:eu-repo/semantics/openAccessMoraes,Maria J. deOliveira Filho,DellyMartins,José H.Santos,Luiz C.eng2012-09-25T00:00:00Zoai:scielo:S1415-43662012001000015Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2012-09-25T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Electric signals for separation of earthworms (Eudrilus eugeniæ)
title Electric signals for separation of earthworms (Eudrilus eugeniæ)
spellingShingle Electric signals for separation of earthworms (Eudrilus eugeniæ)
Moraes,Maria J. de
vermiculture
vermicomposting
electric stimulation
title_short Electric signals for separation of earthworms (Eudrilus eugeniæ)
title_full Electric signals for separation of earthworms (Eudrilus eugeniæ)
title_fullStr Electric signals for separation of earthworms (Eudrilus eugeniæ)
title_full_unstemmed Electric signals for separation of earthworms (Eudrilus eugeniæ)
title_sort Electric signals for separation of earthworms (Eudrilus eugeniæ)
author Moraes,Maria J. de
author_facet Moraes,Maria J. de
Oliveira Filho,Delly
Martins,José H.
Santos,Luiz C.
author_role author
author2 Oliveira Filho,Delly
Martins,José H.
Santos,Luiz C.
author2_role author
author
author
dc.contributor.author.fl_str_mv Moraes,Maria J. de
Oliveira Filho,Delly
Martins,José H.
Santos,Luiz C.
dc.subject.por.fl_str_mv vermiculture
vermicomposting
electric stimulation
topic vermiculture
vermicomposting
electric stimulation
description The worm Eudrilus eugeniæ is a species adapted to tropical climates and is highly demanded as fishing bait, therefore possessing high economic value. Separation of worms from humus is typically performed by manual, mechanical, behavioral and electric methods. The objective of this study was to characterize electric pulses for separation of worms (Eudrilus eugeniæ) from humus. To determine separation efficiency of worms from humus, a controlled pulse generator was used with frequencies of 1 and 5 Hz, voltages of 100 and 200 V, peak widths of 2, 3 and 4 x 10-3 s and exposure times of 15 and 30 min. The electrical pulse characteristics which resulted in greatest separation efficiency were: 1 Hz, 2 x 10-3 s and 200 V; and the maximum displacement index was 80% which occurred under these conditions. The survival index was 100% for the pulses which resulted in the greatest separation indices.
publishDate 2012
dc.date.none.fl_str_mv 2012-10-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012001000015
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1415-43662012001000015
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.16 n.10 2012
reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
instname:Universidade Federal de Campina Grande (UFCG)
instacron:UFCG
instname_str Universidade Federal de Campina Grande (UFCG)
instacron_str UFCG
institution UFCG
reponame_str Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
collection Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
repository.name.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)
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