Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/1519-6984.06414 http://hdl.handle.net/11449/172309 |
Resumo: | In Southeastern Brazil tilapia culture is conducted in extensive and semi-intensive flow-through earthen ponds, being water availability and flow management different in the rainy and dry seasons. In this region lettuce wastes are a potential cheap input for tilapia culture. This study examined the ecological processes developing during the rainy and dry seasons in three extensive flow-through earthen tilapia ponds fertilized with lettuce wastes. Water quality, plankton and sediment parameters were sampled monthly during a year. Factor analysis was used to identify the ecological processes occurring within the ponds and to construct a conceptual graphic model of the pond ecosystem functioning during the rainy and dry seasons. Processes related to nitrogen cycling presented differences between both seasons while processes related to phosphorus cycling did not. Ecological differences among ponds were due to effects of wind protection by surrounding vegetation, organic loading entering, tilapia density and its grazing pressure on zooplankton. Differences in tilapia growth among ponds were related to stocking density and ecological process affecting tilapia food availability and intraspecific competition. Lettuce wastes addition into the ponds did not produce negative effects, thus this practice may be considered a disposal option and a low-cost input source for tilapia, at least at the amounts applied in this study. |
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Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do BrasilEffects of season on ecological processes in extensive earthen tilapia ponds in Southeastern BrazilEarthen pond ecologyFlow-throughSeasonal variationsTilapia extensive cultureWater qualityIn Southeastern Brazil tilapia culture is conducted in extensive and semi-intensive flow-through earthen ponds, being water availability and flow management different in the rainy and dry seasons. In this region lettuce wastes are a potential cheap input for tilapia culture. This study examined the ecological processes developing during the rainy and dry seasons in three extensive flow-through earthen tilapia ponds fertilized with lettuce wastes. Water quality, plankton and sediment parameters were sampled monthly during a year. Factor analysis was used to identify the ecological processes occurring within the ponds and to construct a conceptual graphic model of the pond ecosystem functioning during the rainy and dry seasons. Processes related to nitrogen cycling presented differences between both seasons while processes related to phosphorus cycling did not. Ecological differences among ponds were due to effects of wind protection by surrounding vegetation, organic loading entering, tilapia density and its grazing pressure on zooplankton. Differences in tilapia growth among ponds were related to stocking density and ecological process affecting tilapia food availability and intraspecific competition. Lettuce wastes addition into the ponds did not produce negative effects, thus this practice may be considered a disposal option and a low-cost input source for tilapia, at least at the amounts applied in this study.Centro de Aquicultura Universidade Estadual Paulista – UNESP, Via de Acesso Prof. Paulo D. Castellane, s/nAgricultural Research Organization Fish and Aquaculture Research Station – DorCentro de Aquicultura Universidade Estadual Paulista – UNESP, Via de Acesso Prof. Paulo D. Castellane, s/nUniversidade Estadual Paulista (Unesp)Fish and Aquaculture Research Station – DorFavaro, E. G.P. [UNESP]Sipaúba-Tavares, L. H. [UNESP]Milstein, A.2018-12-11T16:59:38Z2018-12-11T16:59:38Z2015-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleS97-S107application/pdfhttp://dx.doi.org/10.1590/1519-6984.06414Brazilian Journal of Biology, v. 75, n. 4, p. S97-S107, 2015.1678-43751519-6984http://hdl.handle.net/11449/17230910.1590/1519-6984.06414S1519-698420150008000972-s2.0-84949961043S1519-69842015000800097.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Biology0,523info:eu-repo/semantics/openAccess2024-04-09T15:29:58Zoai:repositorio.unesp.br:11449/172309Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-09T15:29:58Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil Effects of season on ecological processes in extensive earthen tilapia ponds in Southeastern Brazil |
title |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil |
spellingShingle |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil Favaro, E. G.P. [UNESP] Earthen pond ecology Flow-through Seasonal variations Tilapia extensive culture Water quality |
title_short |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil |
title_full |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil |
title_fullStr |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil |
title_full_unstemmed |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil |
title_sort |
Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil |
author |
Favaro, E. G.P. [UNESP] |
author_facet |
Favaro, E. G.P. [UNESP] Sipaúba-Tavares, L. H. [UNESP] Milstein, A. |
author_role |
author |
author2 |
Sipaúba-Tavares, L. H. [UNESP] Milstein, A. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Fish and Aquaculture Research Station – Dor |
dc.contributor.author.fl_str_mv |
Favaro, E. G.P. [UNESP] Sipaúba-Tavares, L. H. [UNESP] Milstein, A. |
dc.subject.por.fl_str_mv |
Earthen pond ecology Flow-through Seasonal variations Tilapia extensive culture Water quality |
topic |
Earthen pond ecology Flow-through Seasonal variations Tilapia extensive culture Water quality |
description |
In Southeastern Brazil tilapia culture is conducted in extensive and semi-intensive flow-through earthen ponds, being water availability and flow management different in the rainy and dry seasons. In this region lettuce wastes are a potential cheap input for tilapia culture. This study examined the ecological processes developing during the rainy and dry seasons in three extensive flow-through earthen tilapia ponds fertilized with lettuce wastes. Water quality, plankton and sediment parameters were sampled monthly during a year. Factor analysis was used to identify the ecological processes occurring within the ponds and to construct a conceptual graphic model of the pond ecosystem functioning during the rainy and dry seasons. Processes related to nitrogen cycling presented differences between both seasons while processes related to phosphorus cycling did not. Ecological differences among ponds were due to effects of wind protection by surrounding vegetation, organic loading entering, tilapia density and its grazing pressure on zooplankton. Differences in tilapia growth among ponds were related to stocking density and ecological process affecting tilapia food availability and intraspecific competition. Lettuce wastes addition into the ponds did not produce negative effects, thus this practice may be considered a disposal option and a low-cost input source for tilapia, at least at the amounts applied in this study. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-11-01 2018-12-11T16:59:38Z 2018-12-11T16:59:38Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/1519-6984.06414 Brazilian Journal of Biology, v. 75, n. 4, p. S97-S107, 2015. 1678-4375 1519-6984 http://hdl.handle.net/11449/172309 10.1590/1519-6984.06414 S1519-69842015000800097 2-s2.0-84949961043 S1519-69842015000800097.pdf |
url |
http://dx.doi.org/10.1590/1519-6984.06414 http://hdl.handle.net/11449/172309 |
identifier_str_mv |
Brazilian Journal of Biology, v. 75, n. 4, p. S97-S107, 2015. 1678-4375 1519-6984 10.1590/1519-6984.06414 S1519-69842015000800097 2-s2.0-84949961043 S1519-69842015000800097.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Biology 0,523 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
S97-S107 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964997487427584 |