Proposta para identificação rápida dos períodos hidrológicos em áreas de várzea do rio Solimões-Amazonas nas proximidades de Manaus

Bittencourt, Maria Mercedes; Amadio, Sidinéia

doi:10.1590/s0044-59672007000200019

Cited by 71 publications

(58 citation statements)

References 3 publications

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“…Annual Madeira River level variation between dry and flood season ranges from 11 to 13 m and it is distinct from values observed in central Amazon (Bittencourt & Amadio 2005). The flood pulse in upper Madeira River area presented a long rising and a short high water period during sampling (pers.obs.).…”

Section: Study Areamentioning

confidence: 78%

Composition and trophic structure of the ichthyofauna from a stream downriver from Santo Antonio Falls in the Madeira River, Porto Velho, RO

et al. 2009

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Belmont Stream is the main tributary of the Madeira River in the area immediately downriver from the Santo Antonio Fall. Samplings were carried out using gill nets in the mouth of this stream between May 2005 and April 2006 and resulted in a list of 74 species. The analyses included values of composition, constancy of occurrence, species richness, abundance, Catch Per Unit of Effort and trophic structure about the ten most abundant species. Characiformes and Siluriformes were dominant order in the samples and Curimatidae (popularly known as "branquinhas") was the most abundant family, represented by Psectrogaster rutiloides (32.57% of the collected specimens), Potamorhina altamazonica (10.72%), and Potamorhina latior (7.79%). The most of species were considered accessory and accidental and richness suggests high values in the rising and high water. Belmont maybe considered as a moderate richness when compared to those found for others Amazon rivers. Detritivorous fishes composed 60% of the assemblage and the constancy of the most abundant species of this family suggests Belmont as an important area to these migratory fishes. Resumo: O igarapé Belmont localiza-se a cerca de 30 km de Porto Velho e é o principal afluente do rio Madeira na área imediatamente a jusante da cachoeira de Santo Antonio. No período compreendido entre maio de 2005 a abril de 2006, dez coletas realizadas na foz deste igarapé geraram uma lista com 74 espécies coletadas por malhadeiras. As análises incluem características físico-químicas do igarapé estudado, valores de riqueza, composição, constância, estrutura trófica da assembléia de peixes e valores de CPUE. O predomínio das ordens Characiformes e Siluriformes confirma o esperado para a Amazônia. A família Curimatidae foi a mais abundante, representada por Psectrogaster rutiloides (32,57%), Potamorhina altamazonica (10,72%) e Potamorhina latior (7,79%), popularmente conhecidas como branquinhas. A riqueza e constância de algumas espécies sugerem um papel especial da área no que diz respeito à transposição das corredeiras pelas espécies. Conclui-se que a estrutura e a composição da ictiofauna na área estudada do igarapé Belmont é marcada por espécies migradoras detritívoras, possivelmente em função do papel do rio Madeira nas rotas migratórias. Palavras-chave: riqueza, dominância, CPUE, rotas migratórias, Amazônia.

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Section: Study Areamentioning

confidence: 78%

Composition and trophic structure of the ichthyofauna from a stream downriver from Santo Antonio Falls in the Madeira River, Porto Velho, RO

et al. 2009

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“…As defined by Bittencourt and Amadio (2007), the hydrologial cycle in the Amazon is composed by four hydrological periods: rising-water entering the river system and increasing water level from mid December to beggining of March, with change between 20 to 26 m above sea level; high -water level equal or above to 26m above sea level from beggining of March to the end of July; reciding -water leaving the river system and water levels falling from the end of July to the end of October between 26 and 20m above the sea level; low-water level equal or below 20m above sea level from the end of October to mid December.…”

Section: Introductionmentioning

confidence: 99%

Zooplankton community structure of the lower Xingu River (PA) related to the hydrological cycle

et al. 2015

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The zooplankton community of the lower Xingu River shows strong fluctuations in species richness and number of organisms during periods of water level fluctuation. Pulses of density and species richness are adapted to the pulses in water flows and water level. This is conected with reproductive strategies of some zooplankton groups. The spatial heterogeneity of the lower Xingu River consisting of braided channels, bedrocks, macrophyte stands, is probably a relevant factor for the species richness of the zooplankton communities, and may be a fundamental factor for the overall aquatic biodiversity of the lower Xingu River.Keywords: Lower Xingu River, hydrological cycle, zooplankton richness, endemic species, reproductive strategies. Estrutura da comunidade do zooplancton do Baixo Rio Xingu (PA), em relação ao ciclo hidrológico ResumoA comunidade zooplanctônica do Baixo Rio Xingú apresenta grandes flutuações em riqueza de espécies e na densidade (n o org./m 3 ) durante os diferentes períodos de flutuação do nível da água. Pulsos de densidade e de riqueza de espécies, são adaptados e ajustados aos pulsos em nível da água e fluxo. Isto está conectado com as estratégias reprodutivas de certos grupos de zooplancton. A heterogeneidade espacial do baixo Rio Xingú consistindo de canais anastomosados, pedrais, macrófitas aquáticas é provavelmente um fator relevante que impulsiona a riqueza de espécies das comunidades zooplanctõnicas e pode ser um fator fundamental para a alta biodiversidade aquática do Rio Xingú.Palavras-chave: Baixo Rio Xingú, ciclo hidrológico, riqueza de zooplancton, espécies endêmicas, estratégias reprodutivas.

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“…The hydrological cycle for the studying site was defined according to BITTENCOURT & AMADIO (2007), considering four hydrological periods: rising-water entering the river system and water levels increasing, from mid December to early March, between 20-26 m above sea level; high-water level equal to or above 26 m above sea level, from early March to late of July; recedingwater leaving the river system with water level decreasing, from late July to late October, between 26-20 m above sea level; low-water level equal to or below 20 m above sea level, from and October to mid December.…”

Section: Methodsmentioning

confidence: 99%

Feeding of Pellona flavipinnis (Clupeiformes, Pristigasteridae)in a Central Amazonian floodplain

Moreira-Hara

Zuanon

Amadio

2009

Iheringia, Sér. Zool.

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ABSTRACT. The feeding habits of Pellona flavipinnis (Valenciennes, 1836) at Catalão, a floodplain area on the Brazilian Central Amazon was studied. Data was obtained during three hydrological cycles, between September 1999 and September 2003. Diet composition, daily and seasonal variation in the feeding activity and the relationship between predator's size and its prey were analyzed. Almost 80% of the food consumed has autochthonous origin and diet was composed basically by insects and fish. Juvenile fish predominated in the stomach contents of all size classes but there was no significant relationship between predator's size and its prey. Pellona flavipinnis may be considered a carnivorous species which feeds mainly on juvenile (young-of-the-year) specimens of other fish. More intense feeding activity occurred at night and in the high water period. KEYWORDS.Amazon basin, hydrological cycle, diet, carnivory, feeding activity.RESUMO. Dieta de Pellona flavipinnis (Clupeiformes, Pristigasteridae) em planície alagada da Amazônia Central. Os hábitos alimentares de Pellona flavipinnis (Valenciennes, 1836) de uma área de várzea na Amazônia Central, Catalão, foram estudados. Foram utilizados dados referentes a três ciclos hidrológicos, entre setembro de 1999 e setembro de 2003. Foram analisados a dieta, a atividade alimentar diária e sazonal e a relação entre o comprimento da presa e o do predador. Cerca de 80% dos alimentos consumidos eram de origem autóctone e a dieta composta basicamente de insetos e peixes. Peixes juvenis predominaram nos conteúdos estomacais de exemplares de todas as classes de tamanho, mas não houve relação significativa entre o tamanho do predador e o das presas consumidas. Pellona flavipinnis pode ser considerada uma espécie carnívora que se alimenta principalmente de indivíduos juvenis de outras espécies de peixes. A atividade alimentar foi maior durante a noite e no período da cheia.

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Proposta para identificação rápida dos períodos hidrológicos em áreas de várzea do rio Solimões-Amazonas nas proximidades de Manaus

Cited by 71 publications

References 3 publications

Composition and trophic structure of the ichthyofauna from a stream downriver from Santo Antonio Falls in the Madeira River, Porto Velho, RO

Composition and trophic structure of the ichthyofauna from a stream downriver from Santo Antonio Falls in the Madeira River, Porto Velho, RO

Zooplankton community structure of the lower Xingu River (PA) related to the hydrological cycle

Feeding of Pellona flavipinnis (Clupeiformes, Pristigasteridae)in a Central Amazonian floodplain

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