Production of monosex male nile tilapia populations of the Chitralada strain

Detalhes bibliográficos
Autor(a) principal: Borges, Adalmyr Morais
Data de Publicação: 2005
Outros Autores: Moretti, Júlio Otávio Costa, McManus, Concepta, Mariante, Arthur da Silva
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/6936
Resumo: The effect of high temperature on sex ratio in the Chitralada strain of Nile tilapia (Oreochromis niloticus) was tested using two experiments. Primarily, the animals were exposed to a high (35ºC) or control (27ºC) water temperature for a 28-day-period, beginning ten days after hatching. A significant difference in sex ratio was found. The highest proportion of males was in the high temperature group (72.39%), compared with the control group (62.27%). No differences were found for total length or body weight between the groups. In the second experiment, the effect of exposure times (7, 14, 21 and 28 days starting ten days post hatching) at a constant temperature of 35ºC was tested. No differences were found in sex ratio between groups. A significant difference was found between treatments for body weight and total length. In both experiments, the survival rate had a direct relationship with the occurrence of cannibalism, which was significantly higher at 35ºC. The significant temperature effect on sex ratio found in the first experiment indicates the thermosensitivity of the Chitralada strain.
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spelling Production of monosex male nile tilapia populations of the Chitralada strainProdução de populações monossexo macho de tilápia-do-nilo da linhagem ChitraladaOreochromis niloticus; sex ratio; aquaculture; sex inversion; temperatureOreochromis niloticus; proporção de sexos; aqüicultura; reversão sexual; temperaturaThe effect of high temperature on sex ratio in the Chitralada strain of Nile tilapia (Oreochromis niloticus) was tested using two experiments. Primarily, the animals were exposed to a high (35ºC) or control (27ºC) water temperature for a 28-day-period, beginning ten days after hatching. A significant difference in sex ratio was found. The highest proportion of males was in the high temperature group (72.39%), compared with the control group (62.27%). No differences were found for total length or body weight between the groups. In the second experiment, the effect of exposure times (7, 14, 21 and 28 days starting ten days post hatching) at a constant temperature of 35ºC was tested. No differences were found in sex ratio between groups. A significant difference was found between treatments for body weight and total length. In both experiments, the survival rate had a direct relationship with the occurrence of cannibalism, which was significantly higher at 35ºC. The significant temperature effect on sex ratio found in the first experiment indicates the thermosensitivity of the Chitralada strain.A fim de avaliar o efeito da alta temperatura na proporção de sexos da tilápia-do-nilo (Oreochromis niloticus) da linhagem Chitralada, foram conduzidos dois experimentos. No primeiro foram analisados, por 28 dias, os efeitos da temperatura de 35ºC, em relação ao controle (27ºC), iniciando-se dez dias após a eclosão. Foi encontrada diferença significativa na proporção de sexos, sendo que o maior porcentual de machos foi encontrado no tratamento de temperatura alta (72,39%), em comparação com o controle (62,27%). Não foram encontradas diferenças de peso corporal e de comprimento total entre os tratamentos. No segundo experimento, foram analisados os efeitos dos períodos de exposição à temperatura de 35ºC, aos 7, 14, 21 e 28 dias, iniciando-se dez dias após a eclosão. Não houve diferença na proporção de sexos entre os períodos de exposição. Foram encontradas diferenças significativas entre os tratamentos, tanto para peso corporal como para comprimento total. Nos dois experimentos, as taxas de sobrevivência relacionaram-se diretamente com a ocorrência de canibalismo, significativamente maior a 35ºC. Os efeitos significativos da temperatura na proporção de sexos, no primeiro experimento, indicam a termossensibilidade na linhagem Chitralada.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBorges, Adalmyr MoraisMoretti, Júlio Otávio CostaMcManus, ConceptaMariante, Arthur da Silva2005-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6936Pesquisa Agropecuaria Brasileira; v.40, n.2, fev. 2005; 153-159Pesquisa Agropecuária Brasileira; v.40, n.2, fev. 2005; 153-1591678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6936/3984info:eu-repo/semantics/openAccess2014-09-22T19:28:55Zoai:ojs.seer.sct.embrapa.br:article/6936Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-22T19:28:55Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Production of monosex male nile tilapia populations of the Chitralada strain
Produção de populações monossexo macho de tilápia-do-nilo da linhagem Chitralada
title Production of monosex male nile tilapia populations of the Chitralada strain
spellingShingle Production of monosex male nile tilapia populations of the Chitralada strain
Borges, Adalmyr Morais
Oreochromis niloticus; sex ratio; aquaculture; sex inversion; temperature
Oreochromis niloticus; proporção de sexos; aqüicultura; reversão sexual; temperatura
title_short Production of monosex male nile tilapia populations of the Chitralada strain
title_full Production of monosex male nile tilapia populations of the Chitralada strain
title_fullStr Production of monosex male nile tilapia populations of the Chitralada strain
title_full_unstemmed Production of monosex male nile tilapia populations of the Chitralada strain
title_sort Production of monosex male nile tilapia populations of the Chitralada strain
author Borges, Adalmyr Morais
author_facet Borges, Adalmyr Morais
Moretti, Júlio Otávio Costa
McManus, Concepta
Mariante, Arthur da Silva
author_role author
author2 Moretti, Júlio Otávio Costa
McManus, Concepta
Mariante, Arthur da Silva
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Borges, Adalmyr Morais
Moretti, Júlio Otávio Costa
McManus, Concepta
Mariante, Arthur da Silva
dc.subject.por.fl_str_mv Oreochromis niloticus; sex ratio; aquaculture; sex inversion; temperature
Oreochromis niloticus; proporção de sexos; aqüicultura; reversão sexual; temperatura
topic Oreochromis niloticus; sex ratio; aquaculture; sex inversion; temperature
Oreochromis niloticus; proporção de sexos; aqüicultura; reversão sexual; temperatura
description The effect of high temperature on sex ratio in the Chitralada strain of Nile tilapia (Oreochromis niloticus) was tested using two experiments. Primarily, the animals were exposed to a high (35ºC) or control (27ºC) water temperature for a 28-day-period, beginning ten days after hatching. A significant difference in sex ratio was found. The highest proportion of males was in the high temperature group (72.39%), compared with the control group (62.27%). No differences were found for total length or body weight between the groups. In the second experiment, the effect of exposure times (7, 14, 21 and 28 days starting ten days post hatching) at a constant temperature of 35ºC was tested. No differences were found in sex ratio between groups. A significant difference was found between treatments for body weight and total length. In both experiments, the survival rate had a direct relationship with the occurrence of cannibalism, which was significantly higher at 35ºC. The significant temperature effect on sex ratio found in the first experiment indicates the thermosensitivity of the Chitralada strain.
publishDate 2005
dc.date.none.fl_str_mv 2005-02-01
dc.type.none.fl_str_mv
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://seer.sct.embrapa.br/index.php/pab/article/view/6936
url https://seer.sct.embrapa.br/index.php/pab/article/view/6936
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6936/3984
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 Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.40, n.2, fev. 2005; 153-159
Pesquisa Agropecuária Brasileira; v.40, n.2, fev. 2005; 153-159
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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