Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Acta Scientiarum. Animal Sciences (Online) |
Texto Completo: | https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3137 |
Resumo: | This investigation aimed to evaluate the effects of organic matter (pig manure) and nutrients on the structure of zooplankton in plankton tanks at Furnas hatchery station. Zooplankton is commonly used as food resource of Hoplias lacerdae fry. Total lipid levels, density and biomass of zooplankton were analyzed in two plankton tanks twice a week during 60 days. Water temperature, pH, dissolved oxygen and electric conductivity were also monitored daily. Chlorophyll-a, total phosphorus, ammonium and total kejdahl nitrogen (TKN) were measured on a weekly basis. In the first thirty days, nutrient fertilization was performed every five days. In the last thirty days, there was no external input of nutrient or organic material. The interruption of external nutrient load caused a clear and conspicuous modification in most physical and chemical variables as well as in the zooplankton. There was an abrupt and conspicuous reduction in the conductivity, ammonium, TKN, total phosphorus and chlorophyll. On the other hand, dissolved oxygen and pH increased. Biomass of total zooplankton also showed a brief peak following the interruption of external nutrient flux. During this period, the cladocera Moina and the rotifer Brachionus calyciflorus became the dominant zooplanktons. At the end of the study, the ciclopods became once more the dominant organisms, although there was a higher proportion of immature stages. Levels of total lipids of zooplankton remained at lower levels (6-10%) throughout the covered period, suggesting that zooplankton was eating food particles of lower nutritional quality. Nevertheless, the study demonstrates that nutrient input is essential for maintaining zooplankton at adequate levels. However, lower lipid levels also suggest that the quality, quantity and frequency of this nutrient input showed be thoroughly revised. |
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Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture stationEfeitos de fertilização na biomassa e qualidade nutricional do zooplâncton utilizado para alimentação de alevinos na estação de hidrobiologia e piscicultura de Furnas, MGlípideosalevinoszooplânctonbiomassafertilizaçãoaqüicultura5.04.00.00-2 ZootecniaThis investigation aimed to evaluate the effects of organic matter (pig manure) and nutrients on the structure of zooplankton in plankton tanks at Furnas hatchery station. Zooplankton is commonly used as food resource of Hoplias lacerdae fry. Total lipid levels, density and biomass of zooplankton were analyzed in two plankton tanks twice a week during 60 days. Water temperature, pH, dissolved oxygen and electric conductivity were also monitored daily. Chlorophyll-a, total phosphorus, ammonium and total kejdahl nitrogen (TKN) were measured on a weekly basis. In the first thirty days, nutrient fertilization was performed every five days. In the last thirty days, there was no external input of nutrient or organic material. The interruption of external nutrient load caused a clear and conspicuous modification in most physical and chemical variables as well as in the zooplankton. There was an abrupt and conspicuous reduction in the conductivity, ammonium, TKN, total phosphorus and chlorophyll. On the other hand, dissolved oxygen and pH increased. Biomass of total zooplankton also showed a brief peak following the interruption of external nutrient flux. During this period, the cladocera Moina and the rotifer Brachionus calyciflorus became the dominant zooplanktons. At the end of the study, the ciclopods became once more the dominant organisms, although there was a higher proportion of immature stages. Levels of total lipids of zooplankton remained at lower levels (6-10%) throughout the covered period, suggesting that zooplankton was eating food particles of lower nutritional quality. Nevertheless, the study demonstrates that nutrient input is essential for maintaining zooplankton at adequate levels. However, lower lipid levels also suggest that the quality, quantity and frequency of this nutrient input showed be thoroughly revised.O estudo objetivou avaliar os efeitos da adição intensiva de dejetos orgânicos e de nutrientes na qualidade do zooplâncton obtido em tanques de plâncton, empregado na alimentação de alevinos de “trairão” (Hoplias lacerdae). Os teores de lipídeos totais do zooplâncton bem como sua abundância e biomassa foram acompanhados, através de duas coletas semanais, em dois tanques de produção de plâncton durante dois meses seguidos. Foram medidos ainda a temperatura, pH, oxigênio dissolvido, condutividade elétrica na coluna de água. As concentrações de clorofila-a, fósforo total, amônia e nitrogênio total (TKN) foram acompanhadas semanalmente. Nos primeiros trinta dias, foi feita a adubação a cada cinco dias e, nos últimos trinta dias, não houve qualquer adubação em ambos os tanques. A interrupção da fertilização causou uma notável e rápida mudança na qualidade físico-química da água bem como na estrutura da comunidade zooplanctônica. Houve um decréscimo nos teores de condutividade, amônia, nitrogênio total, fósforo total e clorofila-a. Em contraste, houve um aumento nos níveis de oxigênio dissolvido e pH. Logo após a parada da fertilização, houve um pico na biomassa total do zooplâncton que perdurou por cerca de 20 dias, em ambos os tanques. Nesse período, o cladócero Moina reticulata e o rotífero Brachionus calyciflorus foram os mais abundantes. No entanto, ao final do período de estudos, os ciclopóides voltaram a ser os organismos dominantes, embora com predominância de formas imaturas. Os teores de lipídeos totais do zooplâncton permaneceram baixos durante todo o período de estudos (6-10%), sugerindo a má qualidade do seu alimento dentro dos tanques. O estudo demonstra que a fertilização é necessária para que seja obtido um zooplâncton com maiores valores nutricionais mas a baixa qualidade da água causada pela hipereutrofização e os baixos níveis de lipídeos encontrados no zooplâncton também sugerem que a qualidade, a dosagem e a freqüência dessa adubação devem ser amplamente revistas.Editora da Universidade Estadual de Maringá2008-05-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/313710.4025/actascianimsci.v22i0.3137Acta Scientiarum. Animal Sciences; Vol 22 (2000); 707-716Acta Scientiarum. Animal Sciences; v. 22 (2000); 707-7161807-86721806-2636reponame:Acta Scientiarum. Animal Sciences (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3137/2198Santeiro, Raquel MagalhãesPinto-Coelho, Ricardo Mottainfo:eu-repo/semantics/openAccess2024-05-17T13:03:51Zoai:periodicos.uem.br/ojs:article/3137Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/oaiactaanim@uem.br||actaanim@uem.br|| rev.acta@gmail.com1807-86721806-2636opendoar:2024-05-17T13:03:51Acta Scientiarum. Animal Sciences (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station Efeitos de fertilização na biomassa e qualidade nutricional do zooplâncton utilizado para alimentação de alevinos na estação de hidrobiologia e piscicultura de Furnas, MG |
title |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station |
spellingShingle |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station Santeiro, Raquel Magalhães lípideos alevinos zooplâncton biomassa fertilização aqüicultura 5.04.00.00-2 Zootecnia |
title_short |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station |
title_full |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station |
title_fullStr |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station |
title_full_unstemmed |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station |
title_sort |
Fertilization effects on biomass and nutritional quality of zooplancton in feeding of fry in the Furnas (MG, Brazil) hydrobiology and pisciculture station |
author |
Santeiro, Raquel Magalhães |
author_facet |
Santeiro, Raquel Magalhães Pinto-Coelho, Ricardo Motta |
author_role |
author |
author2 |
Pinto-Coelho, Ricardo Motta |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Santeiro, Raquel Magalhães Pinto-Coelho, Ricardo Motta |
dc.subject.por.fl_str_mv |
lípideos alevinos zooplâncton biomassa fertilização aqüicultura 5.04.00.00-2 Zootecnia |
topic |
lípideos alevinos zooplâncton biomassa fertilização aqüicultura 5.04.00.00-2 Zootecnia |
description |
This investigation aimed to evaluate the effects of organic matter (pig manure) and nutrients on the structure of zooplankton in plankton tanks at Furnas hatchery station. Zooplankton is commonly used as food resource of Hoplias lacerdae fry. Total lipid levels, density and biomass of zooplankton were analyzed in two plankton tanks twice a week during 60 days. Water temperature, pH, dissolved oxygen and electric conductivity were also monitored daily. Chlorophyll-a, total phosphorus, ammonium and total kejdahl nitrogen (TKN) were measured on a weekly basis. In the first thirty days, nutrient fertilization was performed every five days. In the last thirty days, there was no external input of nutrient or organic material. The interruption of external nutrient load caused a clear and conspicuous modification in most physical and chemical variables as well as in the zooplankton. There was an abrupt and conspicuous reduction in the conductivity, ammonium, TKN, total phosphorus and chlorophyll. On the other hand, dissolved oxygen and pH increased. Biomass of total zooplankton also showed a brief peak following the interruption of external nutrient flux. During this period, the cladocera Moina and the rotifer Brachionus calyciflorus became the dominant zooplanktons. At the end of the study, the ciclopods became once more the dominant organisms, although there was a higher proportion of immature stages. Levels of total lipids of zooplankton remained at lower levels (6-10%) throughout the covered period, suggesting that zooplankton was eating food particles of lower nutritional quality. Nevertheless, the study demonstrates that nutrient input is essential for maintaining zooplankton at adequate levels. However, lower lipid levels also suggest that the quality, quantity and frequency of this nutrient input showed be thoroughly revised. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-05-13 |
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://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3137 10.4025/actascianimsci.v22i0.3137 |
url |
https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3137 |
identifier_str_mv |
10.4025/actascianimsci.v22i0.3137 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3137/2198 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Editora da Universidade Estadual de Maringá |
publisher.none.fl_str_mv |
Editora da Universidade Estadual de Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Animal Sciences; Vol 22 (2000); 707-716 Acta Scientiarum. Animal Sciences; v. 22 (2000); 707-716 1807-8672 1806-2636 reponame:Acta Scientiarum. Animal Sciences (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum. Animal Sciences (Online) |
collection |
Acta Scientiarum. Animal Sciences (Online) |
repository.name.fl_str_mv |
Acta Scientiarum. Animal Sciences (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
actaanim@uem.br||actaanim@uem.br|| rev.acta@gmail.com |
_version_ |
1799315358640766976 |