Formação de cardumes por Astyanax altiparanae (Teleostei: Characidae) no Rio Congonhas, Paraná, Brasil
Foi observado o comportamento de formação de cardumes de Astyanax altiparanae Garutti & Britski, 2000 no subafluente do médio rio Paranapanema, durante o período de janeiro de 1997 a fevereiro de 1998. Foi constatado que essa espécie forma basicamente dois tipos de cardumes: os maiores (aproxima...
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Published in | Revista brasileira de zoologia Vol. 25; no. 3; pp. 566 - 569 |
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Main Authors | , |
Format | Journal Article |
Language | English |
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01.09.2008
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Abstract | Foi observado o comportamento de formação de cardumes de Astyanax altiparanae Garutti & Britski, 2000 no subafluente do médio rio Paranapanema, durante o período de janeiro de 1997 a fevereiro de 1998. Foi constatado que essa espécie forma basicamente dois tipos de cardumes: os maiores (aproximadamente 50 indivíduos) formados pelos menores espécimes e localizando-se à margem, entre a vegetação aquática; enquanto os menores cardumes (cerca de 15 indivíduos), formados por espécimes maiores, localizam-se, preferencialmente, em áreas mais profundas. Foram evidenciadas algumas variações comportamentais (organização e localização) entre esses dois grupos dependendo do tipo de atividade realizada como, freqüência de deslocamento e forrageamento. O comportamento observado desses cardumes ante ao sinal de ameaça reforça a idéia de que a formação de cardumes é, também, uma tática anti-predatória.
The schooling behavior of Astyanax altiparanae Garutti & Britski, 2000, was observed in a subtributary of the mid-Paranapanema River from January 1998 to February 1999. This species was shown to form two types of school: large schools, with approximately 50 individuals, were formed by smaller specimens located near the margin, around aquatic vegetation; and small schools (around 15 individuals), composed of larger specimens living preferentially in areas of deep water. Some behavioral variations in organization and localization were observed between these two groups, depending on the type of conducted activity, such as displacement frequency and foraging. The observed behavior of these schools when under threat underscores the idea that schooling is also an antipredation tactic. |
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AbstractList | Foi observado o comportamento de formação de cardumes de Astyanax altiparanae Garutti & Britski, 2000 no subafluente do médio rio Paranapanema, durante o período de janeiro de 1997 a fevereiro de 1998. Foi constatado que essa espécie forma basicamente dois tipos de cardumes: os maiores (aproximadamente 50 indivíduos) formados pelos menores espécimes e localizando-se à margem, entre a vegetação aquática; enquanto os menores cardumes (cerca de 15 indivíduos), formados por espécimes maiores, localizam-se, preferencialmente, em áreas mais profundas. Foram evidenciadas algumas variações comportamentais (organização e localização) entre esses dois grupos dependendo do tipo de atividade realizada como, freqüência de deslocamento e forrageamento. O comportamento observado desses cardumes ante ao sinal de ameaça reforça a idéia de que a formação de cardumes é, também, uma tática anti-predatória.
The schooling behavior of Astyanax altiparanae Garutti & Britski, 2000, was observed in a subtributary of the mid-Paranapanema River from January 1998 to February 1999. This species was shown to form two types of school: large schools, with approximately 50 individuals, were formed by smaller specimens located near the margin, around aquatic vegetation; and small schools (around 15 individuals), composed of larger specimens living preferentially in areas of deep water. Some behavioral variations in organization and localization were observed between these two groups, depending on the type of conducted activity, such as displacement frequency and foraging. The observed behavior of these schools when under threat underscores the idea that schooling is also an antipredation tactic. |
Author | Suzuki, Fábio M. Orsi, Mário L. |
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References | HELFMAN G.S. (ref5) 1984; 32 SHAW E. (ref12) 1978; 66 PITCHER T.J. (ref11) 1986 ORSI M.L. (ref8) 2004; 21 GARUTTI V. (ref3) 2000; 13 MILINSKI M. (ref7) 1986 CARVALHO C.D. DE (ref1) 2007; 5 ZHENG M. (ref14) 2005; 235 GÉRY J. (ref4) 1977 WOOTON J.R. (ref13) 1998 DUBOC L.F. (ref2) 2007; 24 PARTRIDGE B.L. (ref10) 1982; 246 KREBS J.R. (ref6) 1993 PARTRIDGE B.L. (ref9) 1981; 144 |
References_xml | – year: 1977 ident: ref4 contributor: fullname: GÉRY J. – volume: 24 start-page: 1163 issn: 0101-8175 issue: 4 year: 2007 ident: ref2 article-title: Análise comparativa e aspectos ecológicos da reação de alarme em duas espécies de Mimagoniates (Ostariophysi, Characidae, Glandulocaudinae) publication-title: Revista Brasileira de Zoologia doi: 10.1590/S0101-81752007000400038 contributor: fullname: DUBOC L.F. – volume: 144 start-page: 313 issn: 0340-7594 issue: 3 year: 1981 ident: ref9 article-title: Internal dynamics and the interrelations of fish in schools publication-title: Journal of Comparative Physiology A doi: 10.1007/BF00612563 contributor: fullname: PARTRIDGE B.L. – volume: 13 start-page: 65 year: 2000 ident: ref3 article-title: Descrição de uma espécie nova de Astyanax (Teleostei: Characidae) da bacia do alto rio Paraná e considerações sobre as demais espécies do gênero na bacia publication-title: Comunicações do Museu Ciência e Tecnologia, Série Zoologia contributor: fullname: GARUTTI V. – start-page: 236 volume-title: Constraints placed by predators on feeding behaviour year: 1986 ident: ref7 contributor: fullname: MILINSKI M. – start-page: 294 volume-title: Functions of shoaling behaviour in teleosts year: 1986 ident: ref11 contributor: fullname: PITCHER T.J. – volume: 246 start-page: 114 issn: 0036-8733 issue: 6 year: 1982 ident: ref10 article-title: The structure and function of fish schools publication-title: Scientific American doi: 10.1038/scientificamerican0682-114 contributor: fullname: PARTRIDGE B.L. – volume: 5 start-page: 81 issn: 1679-6225 issue: 1 year: 2007 ident: ref1 article-title: Schooling behavior of Mugil curema (Perciformes: Mugilidae) in an estuary in southeastern Brazil publication-title: Neotropical Ichthyology doi: 10.1590/S1679-62252007000100012 contributor: fullname: CARVALHO C.D. DE – volume: 21 start-page: 207 issn: 0101-8175 issue: 2 year: 2004 ident: ref8 article-title: Biologia populacional de Astyanax altiparanae Garutti & Britski, 2000 (Teleostei, Characidae) do médio rio Paranapanema, Paraná, Brasil publication-title: Revista Brasileira de Zoologia doi: 10.1590/S0101-81752004000200008 contributor: fullname: ORSI M.L. – year: 1998 ident: ref13 contributor: fullname: WOOTON J.R. – volume: 32 start-page: 663 issue: 3 year: 1984 ident: ref5 article-title: School fidelity in fishes: the yellow perch pattern publication-title: Animal Behavior doi: 10.1016/S0003-3472(84)80142-6 contributor: fullname: HELFMAN G.S. – volume: 66 start-page: 166 issn: 0003-0996 issue: 2 year: 1978 ident: ref12 article-title: Schooling fishes publication-title: American Scientist contributor: fullname: SHAW E. – year: 1993 ident: ref6 contributor: fullname: KREBS J.R. – volume: 235 start-page: 153 issn: 0022-5193 year: 2005 ident: ref14 publication-title: Journal of Theoretical Biology doi: 10.1016/j.jtbi.2004.12.025 contributor: fullname: ZHENG M. |
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Title | Formação de cardumes por Astyanax altiparanae (Teleostei: Characidae) no Rio Congonhas, Paraná, Brasil |
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