Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae)
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da FURG (RI FURG) |
Texto Completo: | http://repositorio.furg.br/handle/1/3792 |
Resumo: | The effect of biofilm as an alternative food source and/or a complement for improving culture was assayed for early and advanced juveniles of Cherax quadricarinatus. For both kinds of juveniles, higher values of survival were seen in the experimental groups provided with either biofilm (B) or a combination of both formulated food and biofilm (B+F), compared to the group only receiving formulated food (F). Such higher survival was associated to a better water quality maintained by biofilm, in terms of low levels of both ammonium and nitrite, together with high levels of pH and dissolved oxygen. As for growing, specific growth rate was higher in the groups fed with formulated food, but only for early juveniles. Considering the crayfish biomass at the end of the experiment (i.e., an integrative index of both survival and growth), the best results were seen in the B+F group, for both kind of juveniles. The main micro-organisms present in biofilm were chlorophytas, xantophytas, pennate diatoms, cyanobacteria, flagellates, ciliates, rotifers and nematodes. Most of these items were found in the stomach of crayfishes fed on biofilm. The hepatopancreatic levels of total lipids were higher in animals of both B+F and F groups, compared to those of B group, while energetic reserves in the abdominal muscle showed no differences among experimental groups, for any kind of juveniles. Therefore, biofilm could be considered as a good complement for the culture system of C. quadricarinatus juveniles, mainly by improving survival through the maintenance of a good water quality. Combination of biofilm and formulated food has shown the best results, in terms of both survival and growth of juvenile crayfish. |
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Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae)BiofilmCherax quadricarinatusNatural productionArtificial substratesGrowthWater qualityThe effect of biofilm as an alternative food source and/or a complement for improving culture was assayed for early and advanced juveniles of Cherax quadricarinatus. For both kinds of juveniles, higher values of survival were seen in the experimental groups provided with either biofilm (B) or a combination of both formulated food and biofilm (B+F), compared to the group only receiving formulated food (F). Such higher survival was associated to a better water quality maintained by biofilm, in terms of low levels of both ammonium and nitrite, together with high levels of pH and dissolved oxygen. As for growing, specific growth rate was higher in the groups fed with formulated food, but only for early juveniles. Considering the crayfish biomass at the end of the experiment (i.e., an integrative index of both survival and growth), the best results were seen in the B+F group, for both kind of juveniles. The main micro-organisms present in biofilm were chlorophytas, xantophytas, pennate diatoms, cyanobacteria, flagellates, ciliates, rotifers and nematodes. Most of these items were found in the stomach of crayfishes fed on biofilm. The hepatopancreatic levels of total lipids were higher in animals of both B+F and F groups, compared to those of B group, while energetic reserves in the abdominal muscle showed no differences among experimental groups, for any kind of juveniles. Therefore, biofilm could be considered as a good complement for the culture system of C. quadricarinatus juveniles, mainly by improving survival through the maintenance of a good water quality. Combination of biofilm and formulated food has shown the best results, in terms of both survival and growth of juvenile crayfish.2013-09-16T19:06:29Z2013-09-16T19:06:29Z2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfVIAU, Verónica et al. Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae). Aquaculture, v. 324-325, p. 70-78, 2012. Disponível em: <http://myweb.dal.ca/km458418/article/Viau2012Aquaculture.PDF>. Acesso em: 15 mai. 2012.http://repositorio.furg.br/handle/1/3792engViau, VerónicaOstera, JuanTolivia, AnalíaBallester, Eduardo Luis CupertinoAbreu, Paulo Cesar Oliveira Vergne deRodríguez, Henriqueinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2013-09-16T19:06:29Zoai:repositorio.furg.br:1/3792Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2013-09-16T19:06:29Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false |
dc.title.none.fl_str_mv |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) |
title |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) |
spellingShingle |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) Viau, Verónica Biofilm Cherax quadricarinatus Natural production Artificial substrates Growth Water quality |
title_short |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) |
title_full |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) |
title_fullStr |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) |
title_full_unstemmed |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) |
title_sort |
Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae) |
author |
Viau, Verónica |
author_facet |
Viau, Verónica Ostera, Juan Tolivia, Analía Ballester, Eduardo Luis Cupertino Abreu, Paulo Cesar Oliveira Vergne de Rodríguez, Henrique |
author_role |
author |
author2 |
Ostera, Juan Tolivia, Analía Ballester, Eduardo Luis Cupertino Abreu, Paulo Cesar Oliveira Vergne de Rodríguez, Henrique |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Viau, Verónica Ostera, Juan Tolivia, Analía Ballester, Eduardo Luis Cupertino Abreu, Paulo Cesar Oliveira Vergne de Rodríguez, Henrique |
dc.subject.por.fl_str_mv |
Biofilm Cherax quadricarinatus Natural production Artificial substrates Growth Water quality |
topic |
Biofilm Cherax quadricarinatus Natural production Artificial substrates Growth Water quality |
description |
The effect of biofilm as an alternative food source and/or a complement for improving culture was assayed for early and advanced juveniles of Cherax quadricarinatus. For both kinds of juveniles, higher values of survival were seen in the experimental groups provided with either biofilm (B) or a combination of both formulated food and biofilm (B+F), compared to the group only receiving formulated food (F). Such higher survival was associated to a better water quality maintained by biofilm, in terms of low levels of both ammonium and nitrite, together with high levels of pH and dissolved oxygen. As for growing, specific growth rate was higher in the groups fed with formulated food, but only for early juveniles. Considering the crayfish biomass at the end of the experiment (i.e., an integrative index of both survival and growth), the best results were seen in the B+F group, for both kind of juveniles. The main micro-organisms present in biofilm were chlorophytas, xantophytas, pennate diatoms, cyanobacteria, flagellates, ciliates, rotifers and nematodes. Most of these items were found in the stomach of crayfishes fed on biofilm. The hepatopancreatic levels of total lipids were higher in animals of both B+F and F groups, compared to those of B group, while energetic reserves in the abdominal muscle showed no differences among experimental groups, for any kind of juveniles. Therefore, biofilm could be considered as a good complement for the culture system of C. quadricarinatus juveniles, mainly by improving survival through the maintenance of a good water quality. Combination of biofilm and formulated food has shown the best results, in terms of both survival and growth of juvenile crayfish. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012 2013-09-16T19:06:29Z 2013-09-16T19:06:29Z |
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 |
VIAU, Verónica et al. Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae). Aquaculture, v. 324-325, p. 70-78, 2012. Disponível em: <http://myweb.dal.ca/km458418/article/Viau2012Aquaculture.PDF>. Acesso em: 15 mai. 2012. http://repositorio.furg.br/handle/1/3792 |
identifier_str_mv |
VIAU, Verónica et al. Contribution of biofilm to water quality, survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae). Aquaculture, v. 324-325, p. 70-78, 2012. Disponível em: <http://myweb.dal.ca/km458418/article/Viau2012Aquaculture.PDF>. Acesso em: 15 mai. 2012. |
url |
http://repositorio.furg.br/handle/1/3792 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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.source.none.fl_str_mv |
reponame:Repositório Institucional da FURG (RI FURG) instname:Universidade Federal do Rio Grande (FURG) instacron:FURG |
instname_str |
Universidade Federal do Rio Grande (FURG) |
instacron_str |
FURG |
institution |
FURG |
reponame_str |
Repositório Institucional da FURG (RI FURG) |
collection |
Repositório Institucional da FURG (RI FURG) |
repository.name.fl_str_mv |
Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG) |
repository.mail.fl_str_mv |
|
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1807384402610618368 |