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	Provedor de dados Neotropical Ichthyology (2) Biota Neotropica (1) RChHN (1) Autor Araújo,Francisco Gerson (2) Albrecht,Miriam P. (1) Caramaschi,Érica P. (1) Gusson,André E (1) Martins,Mariana Marques (1) Mendonça,Helaine Silva (1) Oliveira,Ana P (1) Prado-júnior,J A (1) Reis,Vanessa C. S. (1) Santos,Alejandra Filippo Gonzalez Neves dos (1) Santos,Alexandre Clistenes Alcântara (1) Santos,Luciano Neves dos (1) Schiavini,I (1) Vale,Vagner S (1) Mais... Palavra-chave Impoundment (4) Condition factor (1) Diet (1) Dynamic (1) Ecological changes (1) Environmental variables (1) Feeding ecology (1) Freshwater fishes (1) Gonadosomatic index (1) Hydrological regime (1) Mass-length relationship (1) Non-native species (1) Piscivory (1) Richness (1) Scale-eating (1) Tocantins-Araguaya basin (1) Turnover (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Journal article (1) Ano 2018 (1) 2015 (1) 2013 (1) 2004 (1) País Brazil (3) Chile (1) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Resource use by the facultative lepidophage Roeboides affinis (Günther, 1868): a comparison of size classes, seasons and environment types related to impoundment Neotropical Ichthyology Albrecht,Miriam P.; Reis,Vanessa C. S.; Caramaschi,Érica P.. We report the consumption of scales and other food resources by the facultative lepidophage Roeboides affinis in the upper Tocantins River where it was impounded by the Serra da Mesa Hydroelectric Dam. We compared the diet among size classes, between dry and wet seasons, and between sites with distinct water flow characteristics (lotic vs. lentic) related to the distance from the dam and phase of reservoir development. As transparency and fish abundance increased after impoundment, we expected a higher consumption of scales in lentic sites. Likewise, habitat contraction, higher transparency and decrease in terrestrial resources availability, would promote a higher consumption of scales. Scales were consumed by 92% of individuals and represented 26% of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diet; Hydrological regime; Impoundment; Scale-eating; Tocantins-Araguaya basin. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200387 Water level influences on body condition of Geophagus brasiliensis (Perciformes: Cichlidae) in a Brazilian oligotrophic reservoir Neotropical Ichthyology Santos,Alejandra Filippo Gonzalez Neves dos; Santos,Luciano Neves dos; Araújo,Francisco Gerson. Effects of water level fluctuations on body condition of Geophagus brasiliensis were studied in a 30 km² Brazilian oligotrophic reservoir. Physiological condition (K) and gonadosomatic index (GSI) were compared according to water level (low and high). Females' best conditions were associated to higher resources availability during high water, since gonad development did not change between low and high water. Males' condition did not change between water levels, while the highest gonad development occurred in low water. Females presented higher reproductive investment than males, which allocated most of energy for somatic development. This strategy could be a mechanism to undergo the stress caused by oligotrophic characteristics of the reservoir enhanced... Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental variables; Condition factor; Gonadosomatic index; Mass-length relationship; Impoundment. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300007 Rapid changes in tree composition and biodiversity: consequences of dams on dry seasonal forests RChHN Vale,Vagner S; Schiavini,I; Prado-júnior,J A; Oliveira,Ana P; Gusson,André E. BACKGROUND: Plants in a seasonal environment that become close to the artificial lake after dams construction may have enhanced growth or die due to the new conditions. Changes in mortality or growth rates lead to changes in community diversity, and we do not know if the community functions will change; our main hypothesis was that a few years after impoundment, species richness and diversity will increase because the increased supply of water would favor the establishment of water-associated species. Therefore, we evaluated the consequences of proximity of three dry seasonal forests to the water table after damming, with a dynamic evaluation of the species studied to understand changes in diversity in these areas. We sampled 60 plots of 20x10 m in each... Tipo: Journal article Palavras-chave: Dynamic; Ecological changes; Impoundment; Richness; Turnover. Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100013 Size-related and seasonal changes in the diet of the non-native Cichla kelberi Kullander & Ferreira, 2006 in a lowland reservoir in the southeastern Brazil Biota Neotropica Mendonça,Helaine Silva; Santos,Alexandre Clistenes Alcântara; Martins,Mariana Marques; Araújo,Francisco Gerson. Abstract: We examined size-related and seasonal changes in the diet of the peacock bass Cichla kelberi in a tropical lowland reservoir in southeastern Brazil over three hydro-climatic seasons: summer (high rainfall and temperature), winter (low rainfall and temperature), and late spring (increasing rainfall and temperature) during two years (2006-2007). The tested hypothesis is that this non-native predator fish changes diet during the subadult and adult phases and among seasons to adapt in new colonized environment. Fishes of the families Clupeidae (Platanichthys platana), Characidae (Astyanax spp.) and Cichlidae (Cichla kelberi) were the most important food items, followed by insects of the order Odonata. Cannibalism was also recorded for the largest... Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding ecology; Freshwater fishes; Non-native species; Piscivory; Impoundment. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000300207 Registros recuperados: 4 Primeira ... 1 ... Última

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