Floating litter banks are an ephemeral habitat consisting of branches, twigs, flowers, seeds, and fruits that are trapped on the stream water surface by a variety of retention mechanisms. These heterogeneous materials form a deep layer of dead plant matter that is colonized by a variety of organisms...

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Main Authors: Lucélia Nobre Carvalho, Luana Fidelis, Rafael Arruda, André Galuch, Jansen Zuanon
Format: Article
Language:English
Published: Sociedade Brasileira de Ictiologia 2013-03-01
Series:Neotropical Ichthyology
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100085
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author Lucélia Nobre Carvalho
Luana Fidelis
Rafael Arruda
André Galuch
Jansen Zuanon
author_facet Lucélia Nobre Carvalho
Luana Fidelis
Rafael Arruda
André Galuch
Jansen Zuanon
author_sort Lucélia Nobre Carvalho
collection DOAJ
description Floating litter banks are an ephemeral habitat consisting of branches, twigs, flowers, seeds, and fruits that are trapped on the stream water surface by a variety of retention mechanisms. These heterogeneous materials form a deep layer of dead plant matter that is colonized by a variety of organisms, including fish that forage on the aquatic macroinvertebrates found in this unique habitat. In this study, we aimed to characterize which fish species occupy the floating litter banks and their trophic characteristics, as well as determine if fish assemblage composition and species richness can be predicted by the size of the floating litter banks. Fish sampling was conducted in five rivers located in the Amazon basin. Of the 31 floating litter banks sampled that contained fish, 455 individuals were recorded and were distributed within 40 species, 15 families and five orders. Siluriformes were the most representative order among the samples and contained the largest number of families and species. The fish fauna sampled was mainly composed of carnivorous species that are typically found in submerged litter banks of Amazonian streams. The fish assemblage composition in the kinon can be predicted by the volume of the floating litter banks using both presence/absence and abundance data, but not its species richness. In conclusion, kinon banks harbor a rich fish assemblage that utilizes this habitat for shelter and feeding, and may function as a refuge for the fishes during the peak of the flooding season.<br>Bancos de folhi&#231;o flutuantes s&#227;o habitats ef&#234;meros constitu&#237;dos de troncos e galhos de &#225;rvores, flores, sementes e frutos retidos por uma variedade de mecanismos. Estes materiais formam uma camada espessa de mat&#233;ria vegetal morta, que &#233; colonizada por diferentes organismos, incluindo peixes que se alimentam de macroinvertebrados aqu&#225;ticos presentes neste habitat. Nosso objetivo foi caracterizar as esp&#233;cies e caracter&#237;sticas tr&#243;ficas dos peixes que ocupam esses bancos de folhi&#231;o flutuantes, bem como determinar se a composi&#231;&#227;o da assembleia de peixes e a riqueza de esp&#233;cies podem ser previstas pelo tamanho dos bancos. A amostragem dos peixes foi realizada em cinco rios da bacia amaz&#244;nica. Dos 31 bancos de folhi&#231;o flutuantes amostrados que continham peixes, foram registrados 455 indiv&#237;duos distribu&#237;dos em 40 esp&#233;cies, 15 fam&#237;lias e cinco ordens. Siluriformes foi a ordem mais representativa, com o maior n&#250;mero de esp&#233;cies e fam&#237;lias. A fauna de peixes coletados foi composta principalmente por esp&#233;cies carn&#237;voras, que geralmente s&#227;o encontrados em bancos de folhi&#231;o submersos de igarap&#233;s amaz&#244;nicos. A composi&#231;&#227;o das assembleias de peixes do 'kinon' pode ser prevista pelo volume desses bancos de liteira flutuante, tanto utilizando dados de presen&#231;a/aus&#234;ncia quanto de abund&#226;ncia, mas n&#227;o de riqueza de esp&#233;cies. Em conclus&#227;o, os bancos de folhi&#231;o flutuante abrigam uma rica assembleia de peixes, que utilizam esse habitat como local de abrigo e de alimenta&#231;&#227;o, e podem funcionar como ref&#250;gio para a ictiofauna dos bancos de folhi&#231;o submerso durante a esta&#231;&#227;o chuvosa.
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spelling doaj.art-39796b5f0a0b47bf9bccba9bacbff6a02022-12-22T03:46:43ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1679-62251982-02242013-03-011118594Lucélia Nobre CarvalhoLuana FidelisRafael ArrudaAndré GaluchJansen ZuanonFloating litter banks are an ephemeral habitat consisting of branches, twigs, flowers, seeds, and fruits that are trapped on the stream water surface by a variety of retention mechanisms. These heterogeneous materials form a deep layer of dead plant matter that is colonized by a variety of organisms, including fish that forage on the aquatic macroinvertebrates found in this unique habitat. In this study, we aimed to characterize which fish species occupy the floating litter banks and their trophic characteristics, as well as determine if fish assemblage composition and species richness can be predicted by the size of the floating litter banks. Fish sampling was conducted in five rivers located in the Amazon basin. Of the 31 floating litter banks sampled that contained fish, 455 individuals were recorded and were distributed within 40 species, 15 families and five orders. Siluriformes were the most representative order among the samples and contained the largest number of families and species. The fish fauna sampled was mainly composed of carnivorous species that are typically found in submerged litter banks of Amazonian streams. The fish assemblage composition in the kinon can be predicted by the volume of the floating litter banks using both presence/absence and abundance data, but not its species richness. In conclusion, kinon banks harbor a rich fish assemblage that utilizes this habitat for shelter and feeding, and may function as a refuge for the fishes during the peak of the flooding season.<br>Bancos de folhi&#231;o flutuantes s&#227;o habitats ef&#234;meros constitu&#237;dos de troncos e galhos de &#225;rvores, flores, sementes e frutos retidos por uma variedade de mecanismos. Estes materiais formam uma camada espessa de mat&#233;ria vegetal morta, que &#233; colonizada por diferentes organismos, incluindo peixes que se alimentam de macroinvertebrados aqu&#225;ticos presentes neste habitat. Nosso objetivo foi caracterizar as esp&#233;cies e caracter&#237;sticas tr&#243;ficas dos peixes que ocupam esses bancos de folhi&#231;o flutuantes, bem como determinar se a composi&#231;&#227;o da assembleia de peixes e a riqueza de esp&#233;cies podem ser previstas pelo tamanho dos bancos. A amostragem dos peixes foi realizada em cinco rios da bacia amaz&#244;nica. Dos 31 bancos de folhi&#231;o flutuantes amostrados que continham peixes, foram registrados 455 indiv&#237;duos distribu&#237;dos em 40 esp&#233;cies, 15 fam&#237;lias e cinco ordens. Siluriformes foi a ordem mais representativa, com o maior n&#250;mero de esp&#233;cies e fam&#237;lias. A fauna de peixes coletados foi composta principalmente por esp&#233;cies carn&#237;voras, que geralmente s&#227;o encontrados em bancos de folhi&#231;o submersos de igarap&#233;s amaz&#244;nicos. A composi&#231;&#227;o das assembleias de peixes do 'kinon' pode ser prevista pelo volume desses bancos de liteira flutuante, tanto utilizando dados de presen&#231;a/aus&#234;ncia quanto de abund&#226;ncia, mas n&#227;o de riqueza de esp&#233;cies. Em conclus&#227;o, os bancos de folhi&#231;o flutuante abrigam uma rica assembleia de peixes, que utilizam esse habitat como local de abrigo e de alimenta&#231;&#227;o, e podem funcionar como ref&#250;gio para a ictiofauna dos bancos de folhi&#231;o submerso durante a esta&#231;&#227;o chuvosa.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100085Ephemeral habitatsFish assemblagesInsectivoresLotic systemsTrophic structure
spellingShingle Lucélia Nobre Carvalho
Luana Fidelis
Rafael Arruda
André Galuch
Jansen Zuanon
Neotropical Ichthyology
Ephemeral habitats
Fish assemblages
Insectivores
Lotic systems
Trophic structure
topic Ephemeral habitats
Fish assemblages
Insectivores
Lotic systems
Trophic structure
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100085