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Registros recuperados: 42
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Aquatic insects as the main food resource of fish the community in a Neotropical reservoir Neotropical Ichthyology
Vidotto-Magnoni,Ana Paula; Carvalho,Edmir Daniel.
We evaluated the feeding of fish species of the Nova Avanhandava Reservoir, low Tietê River, São Paulo State, Brazil. Fishes were collected in two stretches of the reservoir: Santa Bárbara (14 samples) and Bonito (two samples) between September 2002 and March 2004, using gill and seining nets. The results of stomach contents analysis were expressed with the frequency of occurrence and gravimetric method, combined in the Alimentary Index (AI). The 20 species studied consumed 52 food items, grouped in 10 food categories: aquatic insects, terrestrial insects, crustaceans, fish, macroinvertebrates, microcrustaceans, algae, vegetal matter, detritus/sediment and scales. The aquatic insects (mainly Chironomidae, Odonata and Ephemeroptera) were the most common...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish feeding; Trophic ecology; Resource availability; Zoobenthos.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400020
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Biology and ecomorphology of stream fishes from the rio Mogi-Guaçu basin, Southeastern Brazil Neotropical Ichthyology
Ferreira,Katiane M..
The córrego Paulicéia is a direct tributary of the rio Mogi-Guaçu, located in Santa Rita do Passa Quatro, State of São Paulo, Southeastern Brazil. This stream runs inside a savannah-like (cerrado) environment and it associated vegetation. Biological and ecomorphological aspects of its fish community were studied in three stretches of the stream, denominated herein as the upper, middle and lower courses. The fish fauna recorded in this study consisted of 15 species, belonging to five orders and nine families, based in a total of 715 collected individuals representing 1,450 kg of biomass. The most important abiotic factors related to the occurrence and distribution of the fish fauna were the substrate, current speed, and presence or absence of riparian...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ichthyofauna; Trophic ecology; Reproduction; Upper Paraná basin; Cerrado Biome.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300012
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Contrasting tropical estuarine ecosystem functioning and stability: A comparative study ArchiMer
Villanueva, Ching-maria.
A comparative study of the Sine-saloum (Senegal) and Gambia (The Gambia) estuaries was performed based on trophic model outputs that describe the system structure and functioning. These trophic models were constructed such as to differentiate main energetic flows in the systems and express how climate change may have impacted ecosystem resilience to change. Estuarine fish assemblages are highly resilient despite exposure to vast hydrodynamic variations and stress. Coupled with strong anthropogenic-driven stresses such as fisheries and climate change, ecosystems may undergo severe regime shifts that may weaken their resilience and stability. Taxonomically related and morphologically similar species do not necessarily play similar ecological roles in these...
Tipo: Text Palavras-chave: Complex adaptative systems; Climate change; Food web models; Regime shifts; Ecosystem resilience; Trophic ecology.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00249/36034/34571.pdf
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Diet and ecomorphology of Leporinus reticulatus (Characiformes: Anostomidae) from the upper Rio Juruena, MT, Brazil: ontogenetic shifts related to the feeding ecology Acta Amazonica
MACHADO-EVANGELISTA,Mariana; ESGUÍCERO,André Luiz Henríques; ARCIFA,Marlene Sofia; PEREIRA,Thiago Nilton Alves.
The conservation of diverse and well-distributed fish taxa, as the genus Leporinus, relies intrinsically on the knowledge of the ecological attributes of its representatives. Aiming to increase this knowledge, studies on diet and ecomorphology are ideal to provide important information about species ecology. Thus, this study aimed to analyze aspects of feeding ecology of L. reticulatus, from the upper Rio Juruena, Mato Grosso State, Brazil. The diet of specimens in different ontogenetic stages was compared, as well as their teeth morphology and ecomorphological attributes. Leporinus reticulatus presented omnivorous diet, with higher consumption of invertebrates by smaller specimens (younger ones), and gradual introduction of plant items in larger specimens...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical ichthyofauna; Freshwater fish; Trophic ecology; Ontogenetic morphological variation.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000400383
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Diet and trophic niche overlap of Boana bischoffi and Boana marginata (Anura: Hylidae) in southern Brazil Biota Neotropica
Moser,Camila F.; Oliveira,Mateus de; Avila,Fernanda R. de; Dutra-Araújo,Diogo; Farina,Renata K.; Tozetti,Alexandro M..
Abstract: The species Boana bischoffi and Boana marginata are endemic to the Atlantic Forest, where they often occur in sympatry. There is a large gap in the knowledge of natural history of both species. In this study, we aimed to describe and compare the diet composition of B. bischoffi and B. marginata in the southern domain of the Brazilian Atlantic Forest. We analyzed the gastrointestinal contents of 43 individuals of B. bischoffi and 30 individuals of B. marginata. Both showed a high trophic niche overlap (0.90 Ojk). The most important prey categories for both species belonged to the orders Araneae and Coleoptera. The species niche breadth (Bsta) varied from 0.35 to 0.42, suggesting a generalist feeding behavior for both species. Our data provide...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Trophic ecology; Atlantic forest; Niche breadth; Amphibians.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100502
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Diet and trophic structure of the fish assemblage in the mid-course of the Teles Pires River, Tapajós River basin, Brazil Neotropical Ichthyology
Dary,Eurizângela P.; Ferreira,Efrem; Zuanon,Jansen; Röpke,Cristhiana P..
ABSTRACT This study was carried out in a section of the middle course of the Teles Pires River, a clear water river that drains ancient and highly eroded geological formations, and where five hydropower plants are planned or in construction. In this study we tested the hypothesis that local fish fauna is mainly sustained by autochthonous food resources, with modest changes in the trophic structure of fish assemblages along the hydrometric cycle. Sampling was performed every three months between July 2008 and May 2009 at seven sites distributed along a 50-km section of the river. Piscivores was the most representative group in terms of biomass, abundance and species richness, followed by herbivores, insectivores and omnivores. The trophic structure did not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Environmental impact; Food resources; Temporal dynamics; Trophic ecology.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400201
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Diet of bromeliad-frog Phyllodytes luteolus (Anura, Hylidae) in Atlantic Forest environments: what have the frogs been eating outside sandy coastal plains? Pap. Avulsos de Zool. (São Paulo)
Mageski,Marcio Marques; Campinhos,Elaine Costa; Duca,Charles; Stein,Maria Carolina; Oliveira,Melissa Peron de; Clemente-Carvalho,Rute Beatriz Garcia.
Abstract Knowledge about the diet of anurans in different environments is essential to understanding important aspects of their trophic ecology. The bromeliad-frog Phyllodytes luteolus inhabits tank bromeliads in sandy coastal plains and lowland forests on the mainland, as well as a continental island in southeastern Brazil. In this work, we describe and analyze the diet of P. luteolus in three environments. We obtained the consumed prey items of 92 frogs (32 from sandy coastal plain, 32 from lowland forest and 28 from the island) via a stomach-flushing procedure. We found some variations in consumed prey composition and prey volume across populations, but ants represented the most important consumed prey in all environments. Only ants had a relative...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amphibians; Lowland forest; Prey; Restinga; Trophic ecology.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100229
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Diet of Hemigrammus marginatus (Characiformes: Characidae) in the Upper Contas River, Diamantina Plateau (Bahia, Brazil) Iheringia, Sér. Zool.
Barreto,Silvia B.; Silva,André T.; Souza,Fabiane B.; Jucá-Chagas,Ricardo.
ABSTRACT Studies on the composition of fish diet and on how species exploit food resources are especially relevant in tropical freshwater systems, where dietary plasticity is a commonly used strategy. In this study, we analysed the food spectrum and the environmental, seasonal and ontogenetic variations in the diet of a characid species [Hemigrammus marginatus Ellis, 1911 (Characidae)] in the region of the Upper Contas River, in the Diamantina Plateau, Brazil. We verified an omnivorous/invertivorous and opportunistic food habit, with predominance of insects and microcrustaceans, followed by filamentous algae. Seasonality did not alter the food resources used by the species. However, differences were detected in the dominant categories when comparing the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding; Coastal drainage; Trophic ecology; Freshwater fishes.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100236
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Diet of Leptodactylus fuscus (Amphibia: Anura: Leptodactylidae) in the Pantanal of Miranda river, Brazil Biota Neotropica
Sugai,José Luiz Massao Moreira; Terra,Juliana de Souza; Ferreira,Vanda Lúcia.
Amphibians are usually generalist predators, and their diet is influenced by extrinsic (e.g. food availability) and intrinsic factors (e.g. body size and skull shape). This study aims to describe the diet of adult males and females of Leptodactylus fuscus in the Pantanal of the Miranda river and to answer the following questions: i) Are prey's maximum size and number of food items explained by the anuran's body size? ii) Are richness of morphospecies and number of food items explained by frog sex? iii) Is there diet overlap between male and female? We recorded 62 food items, belonging to seven orders of Arthropoda, and one individual of Annelida. The diet of L. fuscus was dominated by Orthoptera, followed by Coleoptera, Araneae, Hymenoptera, Blattaria,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pantanal floodplain; Food items; Trophic ecology.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100008
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Diet of the Chilean flamingo Phoenicopterus chilensis (Phoenicopteriformes: Phoenicopteridae) in a coastal wetland in Chiloé, southern Chile RChHN
Tobar,Claudio N; Rau,Jaime R; Fuentes,Norka; Gantz,Alberto; Suazo,Cristián G; Cursach,Jaime A; Santibañez,Alexis; Pérez-Schultheiss,Jorge.
BACKGROUND: The geographical distribution of the Chilean flamingo (Phoenicopterus chilensis) includes the southern-central Neotropics. Despite its wide distribution, currently there is no dietary information on its southern distribution range. From June to September 2011, we quantified the diet and prey availability of the Chilean flamingo in the marine wetland of Caulín (41°48' S, 73°37' W), southern Chile. RESULTS: The prey availability related to both plankton and benthos were four species of copepods, four polychaetes, one foraminifera, and two amphipods. The diet of the Chilean flamingo was composed of foraminifera (Ammonia beccarii), copepods (Harpacticus sp.) and polychaetes. The most abundant prey items from feces of flamingos were Ammonia beccarii...
Tipo: Journal article Palavras-chave: Copepods; Diet selectivity; Migration; Trophic ecology.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100014
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Diet of the coati Nasua nasua (Carnivora: Procyonidae) in an area of woodland inserted in an urban environment in Brazil RChHN
FERREIRA,GIOVANNE A; NAKANO-OLIVEIRA,EDUARDO; GENARO,GELSON; LACERDA-CHAVES,ADMA K.
Coatis are omnivores whose diet consists of small vertebrates, invertebrates, and fruit. In urban areas, they may ingest food waste that has been discarded in deposits near their habitat, or they may consume food offered by humans. The present work investigates the diet of coatis through analysis of 56 fecal samples collected from Morro Imperador, a fragment of woodland inserted into an urban center in the municipality of Juiz de Fora, State of Minas Gerais, Brazil. The results point to a diet with niche breadth of 0.4 in which the percentage of occurrence of insects (34.9 %) and fruit (19.9 %) comprise the main dietary items. The presence of food due to human action (direct or indirect) is also constant throughout the year (14.1 %), thereby demonstrating...
Tipo: Journal article Palavras-chave: Anthropic influence; Atlantic Forest; Diet alteration; Trophic ecology.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000100008
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Do local environmental factors structure the trophic niche of the splash tetra, Copella arnoldi? A test in an Amazonian stream system Acta Amazonica
SOARES,Bruno Eleres; BENONE,Naraiana Loureiro; ROSA,Daniela Cristina Oliveira; MONTAG,Luciano Fogaça de Assis.
ABSTRACT Environmental variation affects the availability of spatial and trophic resources in Amazonian streams and may be important factors structuring the diet of fishes. We analyzed the diet composition and trophic niche breadth of the lebiasinid splash tetra, Copella arnoldi, aiming to evaluate how environmental variation in Amazonian streams affects the species’ trophic niche. Fish were captured and environmental factors were recorded in 20 streams in the Caxiuanã National Forest, in the eastern Amazon, in November 2010. We made a semi-quantitative analysis of stomach contents of 200 individuals. Copella arnoldi exhibited an omnivorous diet composed mainly of detritus and allochthonous invertebrates. Environmental variation (stream width, stream...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental variation; Lebiasinidae; Niche breadth; Trophic ecology; Brazilian Amazon.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000100054
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Eating up the world's food web and the human trophic level ArchiMer
Bonhommeau, Sylvain; Dubroca, Laurent; Le Pape, Olivier; Barde, Julien; Kaplan, David; Chassot, Emmanuel; Nieblas, Anne-elise.
Trophic levels are critical for synthesizing species' diets, depicting energy pathways, understanding food web dynamics and ecosystem functioning, and monitoring ecosystem health. Specifically, trophic levels describe the position of species in a food web, from primary producers to apex predators (range, 1-5). Small differences in trophic level can reflect large differences in diet. Although trophic levels are among the most basic information collected for animals in ecosystems, a human trophic level (HTL) has never been defined. Here, we find a global HTL of 2.21, i.e., the trophic level of anchoveta. This value has increased with time, consistent with the global trend toward diets higher in meat. National HTLs ranging between 2.04 and 2.57 reflect a...
Tipo: Text Palavras-chave: Human ecology; Nutrition transition; Trophic ecology.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00171/28190/26609.pdf
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Ecologia trófica de Portunus spinimanus Latreille (Decapoda, Portunidae) na Armação do Itapocoroy, Penha, Santa Catarina, Brasil Zoologia
Branco,Joaquim Olinto; Lunardon-Branco,Maria José.
The feeding of P. spinunanus Latreille, 1819 was analyzed from January to December 1995 using the frequency of occurrence, frequency of points and feeding index methods. The species presents a broad trophic specter and diversified, composed by 24 items. The trophic analyses indicated the species show that the categories Crustacea, Osteichthyes, Echinodennata and Mollusca were the rnostexploited resources.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Decapoda; Portunidae; Portunus spinimanus; Trophic ecology; Natural diet.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300009
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Ecological data for western Indian Ocean tuna ArchiMer
Bodin, Nathalie; Chassot, Emmanuel; Sardenne, Fany; Zudaire, Iker; Grande, Maitane; Dhurmeea, Zahirah; Murua, Hilario; Barde, Julien.
Tipo: Text Palavras-chave: Energetics; Fatty acids; Lipids; Morphometrics; Multi-tissues; Proteins; Stable isotopes; Trophic ecology; Tropical marine ecosystems; Tuna fisheries.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00626/73787/75067.pdf
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Ecological States and the Resilience of Coral Reefs Ecology and Society
McClanahan, Tim; Wildlife Conservation Society; crcp@africaonline.co.ke; Polunin, Nicholas; Newcastle University; n.polunin@ncl.ac.uk; Done, Terry; Australian Institute of Marine Science; t.done@aims.gov.au.
We review the evidence for multiple ecological states and the factors that create ecological resilience in coral reef ecosystems. There are natural differences among benthic communities along gradients of water temperature, light, nutrients, and organic matter associated with upwelling-downwelling and onshore-offshore systems. Along gradients from oligotrophy to eutrophy, plant-animal symbioses tend to decrease, and the abundance of algae and heterotrophic suspension feeders and the ratio of organic to inorganic carbon production tend to increase. Human influences such as fishing, increased organic matter and nutrients, sediments, warm water, and transportation of xenobiotics and diseases are common causes of a large number of recently reported ecological...
Tipo: Peer-Reviewed Reports Palavras-chave: Carbon production; Coral reefs; Diseases; Ecological stress; Fishing; Global climate change; Keystone species; Oligotrophy-eutrophy; Resilience; Trophic ecology.
Ano: 2002
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Ecologie trophique de la tortue verte Chelonia mydas dans les herbiers marins et algueraies du sud-ouest de l’océan Indien ArchiMer
Ballorain, Katia.
Reproduction of sea turtles primarily relies on body reserves stored during the time spent on foraging grounds prior to the nesting season. Accordingly, the investigation of foraging behaviour of sea turtles is critical for better assessing their biology but also for conservation issues of these endangered species. Sea turtles contribute significantly to the consuming biomass of their ecosystem and hence to its functioning, thus providing natural indications of the health of the ecosystem. Yet the trophic ecology of sea turtles is poorly documented because their feeding grounds remain poorly known and for most of them hardly accessible. Among sea turtles the green turtle is the only species where sub-adults and adults are mostly herbivorous feeding on...
Tipo: Text Palavras-chave: Tortue verte Chelonia mydas; Herbier marin; Phanérogame; Algueraie; Mayotte; Réunion; Sud-ouest de l’Océan Indien; Écologie trophique; Green turtles Chelonia mydas; Seagrass; Algae; Mayotte; Reunion Island; Southwestern Indian Ocean; Trophic ecology.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00031/14254/11538.pdf
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Écologie trophique des étoiles de mer de l’Océan Austral : Influence des facteurs environnementaux sur la diversité trophique ArchiMer
Le Bourg, Baptiste.
Like in the rest of the world, climate change impacts the Southern Ocean, but not in the same way in all regions of this ocean. Changes in sea ice cover around the Antarctic continent are one of the most visible manifestations. For example, sea ice cover has decreased significantly in the Western Antarctic Peninsula while it tends to increase slightly on the rest of the coastline of the continent. These changes in environmental conditions influence the functioning of the ecosystems of this ocean. In particular, the disappearance or persistence of sea ice in a region where it was seasonally present may prevent the appearance of summer phytoplankton blooms, thus impacting the dynamics of krill populations and their predators in the pelagic environment. The...
Tipo: Text Palavras-chave: Sea stars; Southern Ocean; Trophic ecology; Stable isotopes.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00633/74468/74296.pdf
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Ecomorphology and diet reflect the spatial segregation between two Siluriformes species inhabiting a stream of the Bodoquena Plateau, in Central Brazil Iheringia, Sér. Zool.
Severo-Neto,Francisco; Teresa,Fabrício B.; Froehlich,Otávio.
Pimelodella taenioptera Miranda Ribeiro, 1914 and Imparfinis schubarti (Gomes, 1956) are two of the most common fish species in Bodoquena Plateau streams, Paraguay basin. These species have benthic habits and subaquatical observations suggested that they present differentiation in their preference for mesohabitat types. Pimelodella taenioptera shows preference for slow waters, such as pools, while I. schubarti is associated to riffles. In this study we investigated if the known patterns of mesohabitat use of P. taenioptera and I. schubarti can be predict by their ecomorphological and trophic traits. We described the dietary habits and ecomorphological attributes of P. taenioptera and I. schubarti individuals, captured in the Parque Nacional da Serra da...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pimelodella; Imparfinis; Ecomorphogical traits; Mesohabitats; Trophic ecology.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000100062
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Feeding ecology of a stream fish assemblage in an Atlantic Forest remnant (Serra do Japi, SP, Brazil) Neotropical Ichthyology
Rolla,Ana Paula Pozzo Rios; Esteves,Katharina Eichbaum; Ávila-da-Silva,Antônio Olinto.
This study aimed to characterize the trophic structure of the fish assemblage in streams of the Serra Japi, an ecotonal area between the Atlantic Forest and inland forests of São Paulo State, Southeastern Brazil. Fish were collected with electrofishing equipment in 15 sites covering different regions, substrate types and riparian vegetation, distributed throughout the Caguaçú River, Caxambú, Piraí and Guapeva River micro-basins, during the rainy (January/February) and dry season (June) of 2007. The 589 specimens analyzed from 22 species, were assigned to different trophic groups, discriminated through a matrix of similarity, based on the food index (IAi). The results show the formation of seven groups with a predominance of insectivorous and omnivorous...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropical streams; Freshwater fish; Trophic ecology; Distribution.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100009
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