Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Brasileira de Biologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400013 |
Resumo: | Length, weight, structural index and sexual maturity in tambaqui Colossoma macropomum were analysed. 449 specimens were obtained from the commercial fishing fleet arriving at Manaus Harbour from the floodplain areas from May 1992 to July 1993. The objective of this study is to describe changes in structural index during one hidrological cycle and to interpret them according to the water level fluctuations and to also determine the time, reproductive period and length in sexual maturity. Sex ratio in tambaqui was 1:1 however, the length of females was significantly longer than males'. Length/weight relationship was described by the expression: Pt = 0.00058*Cp2.9039. b value was significantly different from 3 which meant an alometric growth. Lower condition index values (Kn) were found from August to October at the end of receding water and dry period. The feeding index was significantly lower during the receding water and dry period. Lower hepatosomatic index values were found in December during the dry period. Fishes in lengths longer than 550 mm which were more common from September to December during the dry period, stored larger cavitary fat reserves. Fishes smaller than the standard length of 550 mm stored less fat reserves and were more common during the rising of the water and flooding period. Spawning period of tambaqui extends from September to February in a total spawning synchronized with "repiquetes"(native term used to name a sudden recending and rising of the water level). Length of tambaqui was 60.69 cm, at sexual maturity. |
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Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, BrazilColossoma macropomumfloodplainsstructural indexreproductionsexual maturityLength, weight, structural index and sexual maturity in tambaqui Colossoma macropomum were analysed. 449 specimens were obtained from the commercial fishing fleet arriving at Manaus Harbour from the floodplain areas from May 1992 to July 1993. The objective of this study is to describe changes in structural index during one hidrological cycle and to interpret them according to the water level fluctuations and to also determine the time, reproductive period and length in sexual maturity. Sex ratio in tambaqui was 1:1 however, the length of females was significantly longer than males'. Length/weight relationship was described by the expression: Pt = 0.00058*Cp2.9039. b value was significantly different from 3 which meant an alometric growth. Lower condition index values (Kn) were found from August to October at the end of receding water and dry period. The feeding index was significantly lower during the receding water and dry period. Lower hepatosomatic index values were found in December during the dry period. Fishes in lengths longer than 550 mm which were more common from September to December during the dry period, stored larger cavitary fat reserves. Fishes smaller than the standard length of 550 mm stored less fat reserves and were more common during the rising of the water and flooding period. Spawning period of tambaqui extends from September to February in a total spawning synchronized with "repiquetes"(native term used to name a sudden recending and rising of the water level). Length of tambaqui was 60.69 cm, at sexual maturity.Instituto Internacional de Ecologia1999-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400013Revista Brasileira de Biologia v.59 n.4 1999reponame:Revista Brasileira de Biologia (Online)instname:Instituto Internacional de Ecologia (IIE)instacron:IIE10.1590/S0034-71081999000400013info:eu-repo/semantics/openAccessVILLACORTA-CORREA,M. A.SAINT-PAUL,U.eng2001-04-05T00:00:00Zoai:scielo:S0034-71081999000400013Revistawww.scielo.br/rbbioONGhttps://old.scielo.br/oai/scielo-oai.php||bjb.iie@terra.com.br1806-96060034-7108opendoar:2001-04-05T00:00Revista Brasileira de Biologia (Online) - Instituto Internacional de Ecologia (IIE)false |
dc.title.none.fl_str_mv |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil |
title |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil |
spellingShingle |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil VILLACORTA-CORREA,M. A. Colossoma macropomum floodplains structural index reproduction sexual maturity |
title_short |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil |
title_full |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil |
title_fullStr |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil |
title_full_unstemmed |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil |
title_sort |
Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil |
author |
VILLACORTA-CORREA,M. A. |
author_facet |
VILLACORTA-CORREA,M. A. SAINT-PAUL,U. |
author_role |
author |
author2 |
SAINT-PAUL,U. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
VILLACORTA-CORREA,M. A. SAINT-PAUL,U. |
dc.subject.por.fl_str_mv |
Colossoma macropomum floodplains structural index reproduction sexual maturity |
topic |
Colossoma macropomum floodplains structural index reproduction sexual maturity |
description |
Length, weight, structural index and sexual maturity in tambaqui Colossoma macropomum were analysed. 449 specimens were obtained from the commercial fishing fleet arriving at Manaus Harbour from the floodplain areas from May 1992 to July 1993. The objective of this study is to describe changes in structural index during one hidrological cycle and to interpret them according to the water level fluctuations and to also determine the time, reproductive period and length in sexual maturity. Sex ratio in tambaqui was 1:1 however, the length of females was significantly longer than males'. Length/weight relationship was described by the expression: Pt = 0.00058*Cp2.9039. b value was significantly different from 3 which meant an alometric growth. Lower condition index values (Kn) were found from August to October at the end of receding water and dry period. The feeding index was significantly lower during the receding water and dry period. Lower hepatosomatic index values were found in December during the dry period. Fishes in lengths longer than 550 mm which were more common from September to December during the dry period, stored larger cavitary fat reserves. Fishes smaller than the standard length of 550 mm stored less fat reserves and were more common during the rising of the water and flooding period. Spawning period of tambaqui extends from September to February in a total spawning synchronized with "repiquetes"(native term used to name a sudden recending and rising of the water level). Length of tambaqui was 60.69 cm, at sexual maturity. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-11-01 |
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=S0034-71081999000400013 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400013 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0034-71081999000400013 |
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 |
Instituto Internacional de Ecologia |
publisher.none.fl_str_mv |
Instituto Internacional de Ecologia |
dc.source.none.fl_str_mv |
Revista Brasileira de Biologia v.59 n.4 1999 reponame:Revista Brasileira de Biologia (Online) instname:Instituto Internacional de Ecologia (IIE) instacron:IIE |
instname_str |
Instituto Internacional de Ecologia (IIE) |
instacron_str |
IIE |
institution |
IIE |
reponame_str |
Revista Brasileira de Biologia (Online) |
collection |
Revista Brasileira de Biologia (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Biologia (Online) - Instituto Internacional de Ecologia (IIE) |
repository.mail.fl_str_mv |
||bjb.iie@terra.com.br |
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1754821093661605888 |