Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil
Periodical flooding cause strong modifications in Central Amazonian floodplain. Periodical rising and decreasing of the water level influences abiotic and biotic factors of the aquatic environments. During the flooding season, there is a high feed availability, in contrast with dry season in which f...
| Autor principal: | Yamamoto, Kedma Cristine |
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| Outros Autores: | Soares, Maria Gercilia Mota, Carvalho, Carlos Edwar Freitas de |
| Grau: | Artigo |
| Idioma: | pt_BR |
| Publicado em: |
Acta Amazonica
2020
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https://repositorio.inpa.gov.br/handle/1/13078 |
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oai:repositorio:1-13078 |
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oai:repositorio:1-13078 Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil Feeding of Triportheus angulatus (Spix & Agassiz, 1829) in the Camaleão lake, Manaus, Amazonas state, Brazil Yamamoto, Kedma Cristine Soares, Maria Gercilia Mota Carvalho, Carlos Edwar Freitas de Amazon Floodplain Areas Feeding Triportheus Angulatus Amazônia Areas alagaveis Alimentação Triportheus Angulatus Periodical flooding cause strong modifications in Central Amazonian floodplain. Periodical rising and decreasing of the water level influences abiotic and biotic factors of the aquatic environments. During the flooding season, there is a high feed availability, in contrast with dry season in which feed availability is at the lowest level. Limnological parameters also change seasonally. Oxygen concentrations vary both daily and seasonally, sometimes even showing hypoxic conditions. Despite these alterations, floodplain lakes are inhabited by several fish species, having the most diverse and abundant fish fauna among the Amazonian environments. This study focused on Triportheus angulatus feeding in temporal distribution in order to understand the influences of hydrological changes on individual size, diet composition and feeding even in low oxygen concentrations. In rising waters season, small individuals are predominant while the decreasing and the dry seasons there are mostly larger ones. There is a seasonal change on diet composition and this is related to feed type that is more available: during the rising, fishes eat mainly insects and zooplankton; in the flood season and drying season, seeds and fruits are predominant, and at the dry season they eat mainly insects. Feed ingestion was higher in the rising waters and mostly in the flood, and it was lower in the drying season. Feeding activity was not related with oxygen concentrations. As inundações periódicas na Amazônia Central causam profundas modificações no meio ambiente. A alternância dos períodos de cheias e secas tem influência nos fatores bióticos e abióticos do meio aquático. Na enchente e na cheia é alta a oferta de alimentos, ampliando o espectro alimentar que é restrito na seca. As variáveis limnológicas também sofrem modificações. As concentrações de oxigênio têm variações sazonais e diárias, às vezes com períodos de hipoxia. Apesar dessas alterações, os lagos de várzea são habitados por muitas espécies de peixes e estão entre os ambientes de maior abundância e riqueza de peixes na Amazônia. A distribuição temporal e a alimentação de Triportheus angulatus (Spix & Agassiz, 1829) foi estudada em um lago de várzea da Amazônia Central para entender a influência das modificações hídricas sobre o tamanho dos indivíduos, a composição da dieta e a ingestão dos alimentos mesmo em condições de baixas concentrações de oxigênio. Na enchente predominam os indivíduos menores, enquanto que na cheia, vazante e seca os maiores. Houve mudança sazonal na composição da dieta que foi relacionada com a disponibilidade de alimentos no ambientena enchente os peixes ingerem principalmente insetos e zooplâncton; na cheia e vazante frutos e sementes, e na seca insetos. O consumo de alimento foi alto na enchente e cheia, decrescendo na vazante e atingindo as menores quantidades na seca. A atividade alimentar, no período estudado, não foi influenciada pelas baixas concentrações de oxigênio existentes no lago. 2020-04-24T15:14:08Z 2020-04-24T15:14:08Z 2004 Artigo https://repositorio.inpa.gov.br/handle/1/13078 10.1590/S0044-59672004000400017 pt_BR Volume 34, Número 4, Pags. 653-659 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Acta Amazonica |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
pt_BR |
| topic |
Amazon Floodplain Areas Feeding Triportheus Angulatus Amazônia Areas alagaveis Alimentação Triportheus Angulatus |
| spellingShingle |
Amazon Floodplain Areas Feeding Triportheus Angulatus Amazônia Areas alagaveis Alimentação Triportheus Angulatus Yamamoto, Kedma Cristine Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil |
| topic_facet |
Amazon Floodplain Areas Feeding Triportheus Angulatus Amazônia Areas alagaveis Alimentação Triportheus Angulatus |
| description |
Periodical flooding cause strong modifications in Central Amazonian floodplain. Periodical rising and decreasing of the water level influences abiotic and biotic factors of the aquatic environments. During the flooding season, there is a high feed availability, in contrast with dry season in which feed availability is at the lowest level. Limnological parameters also change seasonally. Oxygen concentrations vary both daily and seasonally, sometimes even showing hypoxic conditions. Despite these alterations, floodplain lakes are inhabited by several fish species, having the most diverse and abundant fish fauna among the Amazonian environments. This study focused on Triportheus angulatus feeding in temporal distribution in order to understand the influences of hydrological changes on individual size, diet composition and feeding even in low oxygen concentrations. In rising waters season, small individuals are predominant while the decreasing and the dry seasons there are mostly larger ones. There is a seasonal change on diet composition and this is related to feed type that is more available: during the rising, fishes eat mainly insects and zooplankton; in the flood season and drying season, seeds and fruits are predominant, and at the dry season they eat mainly insects. Feed ingestion was higher in the rising waters and mostly in the flood, and it was lower in the drying season. Feeding activity was not related with oxygen concentrations. |
| format |
Artigo |
| author |
Yamamoto, Kedma Cristine |
| author2 |
Soares, Maria Gercilia Mota Carvalho, Carlos Edwar Freitas de |
| author2Str |
Soares, Maria Gercilia Mota Carvalho, Carlos Edwar Freitas de |
| title |
Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil |
| title_short |
Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil |
| title_full |
Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil |
| title_fullStr |
Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil |
| title_full_unstemmed |
Alimentação de Triportheus angulatus (Spix & Agassiz, 1829) no lago Camaleão, Manaus, AM, Brasil |
| title_sort |
alimentação de triportheus angulatus (spix & agassiz, 1829) no lago camaleão, manaus, am, brasil |
| publisher |
Acta Amazonica |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/13078 |
| _version_ |
1787142396824256512 |
| score |
11.755432 |