Lab-scale periphyton-based system for fish culture
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011001200022 |
Resumo: | The present research aimed to assess a lab-scale model to study periphyton-based systems for fish culture. Twenty-five liters plastic aquaria were stocked with three Nile tilapia, Oreochromis niloticus, juveniles (0.77±0.09g; 12 fish m-2) for 6 weeks in a 2x2 factorial design. Small plastic bottles were placed in some aquaria for periphyton development. Two feeding regimes were employed: "full-fed" (standard feeding rates were fully adopted) and "half-fed" (50% of standard feeding rates). Growth performance and limnological variables were observed in each aquarium. There werefive replicates per treatment. Fish have fed actively on periphyton, especially in the half-fed aquaria. The placement of periphyton bottles had no significant effects on the water quality variables, except by the gross primary productivity which became lower. Half-fed aquaria presented lower concentrations of ammonia (0.28-0.29mg L-1), nitrite (0.33-0.37mg L-1) and phosphorus (0.42-0.43mg L-1) than full-fed aquaria (0.57-0.60mg L-1; 0.75-0.77mg L-1; 0.67-0.70mg L-1, respectively). The final body weight of fish in half-fed aquaria with periphyton bottles (6.22±0.64g) was significantly higher than in aquaria without bottles (4.65±0.36g). Although the growth rate of fish was lower in the half-fed aquaria (4.27-4.72 vs. 5.29-5.61% BW day-1), survival was significantly higher when compared to the full-fed aquaria (93.3-100.0 vs. 80.0-83.4%). Only in the aquaria with periphyton the feed conversation ratio was improved by the feeding restriction regime. |
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Lab-scale periphyton-based system for fish cultureperiphytontilapiafeeding restrictionfish cultureThe present research aimed to assess a lab-scale model to study periphyton-based systems for fish culture. Twenty-five liters plastic aquaria were stocked with three Nile tilapia, Oreochromis niloticus, juveniles (0.77±0.09g; 12 fish m-2) for 6 weeks in a 2x2 factorial design. Small plastic bottles were placed in some aquaria for periphyton development. Two feeding regimes were employed: "full-fed" (standard feeding rates were fully adopted) and "half-fed" (50% of standard feeding rates). Growth performance and limnological variables were observed in each aquarium. There werefive replicates per treatment. Fish have fed actively on periphyton, especially in the half-fed aquaria. The placement of periphyton bottles had no significant effects on the water quality variables, except by the gross primary productivity which became lower. Half-fed aquaria presented lower concentrations of ammonia (0.28-0.29mg L-1), nitrite (0.33-0.37mg L-1) and phosphorus (0.42-0.43mg L-1) than full-fed aquaria (0.57-0.60mg L-1; 0.75-0.77mg L-1; 0.67-0.70mg L-1, respectively). The final body weight of fish in half-fed aquaria with periphyton bottles (6.22±0.64g) was significantly higher than in aquaria without bottles (4.65±0.36g). Although the growth rate of fish was lower in the half-fed aquaria (4.27-4.72 vs. 5.29-5.61% BW day-1), survival was significantly higher when compared to the full-fed aquaria (93.3-100.0 vs. 80.0-83.4%). Only in the aquaria with periphyton the feed conversation ratio was improved by the feeding restriction regime.Universidade Federal de Santa Maria2011-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011001200022Ciência Rural v.41 n.12 2011reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/S0103-84782011005000146info:eu-repo/semantics/openAccessCavalcante,Davi de HolandaSilva,Suzete Roberta daPinheiro,Paloma DamascenoMartins,Ádila da CunhaSá,Marcelo Vinícius do Carmo eeng2012-01-09T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Lab-scale periphyton-based system for fish culture |
title |
Lab-scale periphyton-based system for fish culture |
spellingShingle |
Lab-scale periphyton-based system for fish culture Cavalcante,Davi de Holanda periphyton tilapia feeding restriction fish culture |
title_short |
Lab-scale periphyton-based system for fish culture |
title_full |
Lab-scale periphyton-based system for fish culture |
title_fullStr |
Lab-scale periphyton-based system for fish culture |
title_full_unstemmed |
Lab-scale periphyton-based system for fish culture |
title_sort |
Lab-scale periphyton-based system for fish culture |
author |
Cavalcante,Davi de Holanda |
author_facet |
Cavalcante,Davi de Holanda Silva,Suzete Roberta da Pinheiro,Paloma Damasceno Martins,Ádila da Cunha Sá,Marcelo Vinícius do Carmo e |
author_role |
author |
author2 |
Silva,Suzete Roberta da Pinheiro,Paloma Damasceno Martins,Ádila da Cunha Sá,Marcelo Vinícius do Carmo e |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Cavalcante,Davi de Holanda Silva,Suzete Roberta da Pinheiro,Paloma Damasceno Martins,Ádila da Cunha Sá,Marcelo Vinícius do Carmo e |
dc.subject.por.fl_str_mv |
periphyton tilapia feeding restriction fish culture |
topic |
periphyton tilapia feeding restriction fish culture |
description |
The present research aimed to assess a lab-scale model to study periphyton-based systems for fish culture. Twenty-five liters plastic aquaria were stocked with three Nile tilapia, Oreochromis niloticus, juveniles (0.77±0.09g; 12 fish m-2) for 6 weeks in a 2x2 factorial design. Small plastic bottles were placed in some aquaria for periphyton development. Two feeding regimes were employed: "full-fed" (standard feeding rates were fully adopted) and "half-fed" (50% of standard feeding rates). Growth performance and limnological variables were observed in each aquarium. There werefive replicates per treatment. Fish have fed actively on periphyton, especially in the half-fed aquaria. The placement of periphyton bottles had no significant effects on the water quality variables, except by the gross primary productivity which became lower. Half-fed aquaria presented lower concentrations of ammonia (0.28-0.29mg L-1), nitrite (0.33-0.37mg L-1) and phosphorus (0.42-0.43mg L-1) than full-fed aquaria (0.57-0.60mg L-1; 0.75-0.77mg L-1; 0.67-0.70mg L-1, respectively). The final body weight of fish in half-fed aquaria with periphyton bottles (6.22±0.64g) was significantly higher than in aquaria without bottles (4.65±0.36g). Although the growth rate of fish was lower in the half-fed aquaria (4.27-4.72 vs. 5.29-5.61% BW day-1), survival was significantly higher when compared to the full-fed aquaria (93.3-100.0 vs. 80.0-83.4%). Only in the aquaria with periphyton the feed conversation ratio was improved by the feeding restriction regime. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-12-01 |
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=S0103-84782011001200022 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011001200022 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-84782011005000146 |
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 |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Rural v.41 n.12 2011 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140540173058048 |