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| Registros recuperados: 313 | |
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| Marto,Vanilcia Clementino de Oliveira; Akama,Alberto; Pelicice,Fernando Mayer. |
| Cichla piquiti is endemic to the Tocantins-Araguaia river basin, but information about its biology is restricted to populations introduced in other basins. In order to fill this gap, we investigated the feeding ecology and reproductive dynamics of C. piquiti in Lajeado reservoir, rio Tocantins. A total of 270 fish were collected between November 2010 and October 2011. The diet is rich and composed of at least 23 resources, predominantly fish (at least 19 species). We observed no clear influence of sex, periods and ontogeny on diet, which was basically composed of Characidae and Cichlidae. Considering its reproductive dynamics, immature, reproductive and non-reproductive fish were recorded during the whole study, and reproductive effort did not differ among... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Management; Population; Predator; Recruitment. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300625 |
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| Roman,Jorge M.; Chierichetti,Melisa A.; Barbini,Santiago A.; Scenna,Lorena B.. |
| ABSTRACT The feeding habits of Callorhinchus callorynchus were investigated in coastal waters off northern Argentina. The effect of body size, seasons and regions was evaluated on female diet composition using a multiple-hypothesis modelling approach. Callorhinchus callorynchus fed mainly on bivalves (55.61% PSIRI), followed by brachyuran crabs (10.62% PSIRI) and isopods (10.13% PSIRI). Callorhinchus callorynchus females showed changes in the diet composition with increasing body size and also between seasons and regions. Further, this species is able to consume larger bivalves as it grows. Trophic level was 3.15, characterizing it as a secondary consumer. We conclude that C. callorynchus showed a behavior of crushing hard prey, mainly on bivalves,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chondrichthyes; Diet; Ontogenetic shifts; Southwest Atlantic; Trophic level. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000100202 |
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| Albrecht,Miriam P.; Pellegrini-Caramaschi,Erica. |
| The feeding ecology of Leporinus taeniofasciatus in the upper rio Tocantins was characterized before (river phase) and after (reservoir phase) its impoundment by the Serra da Mesa Hydroelectric Dam. The importance of each food item was given by the Alimentary Index (IAi), which combines the frequency of occurrence and volumetric methods. A significant difference in the diet of L. taeniofasciatus between seasons in the river phase, detected by a multivariate analysis of variance, was not kept when the reservoir was formed. Its feeding activity, verified through the percentage of stomachs with different degrees of fullness, was not affected by the impoundment. Leporinus taeniofasciatus was able to incorporate terrestrial food items to its diet when they... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Fish; Neotropical; Reservoir. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252003000100006 |
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| Gimenes,Michele de Faveri; Fugi,Rosemara; Isaac,Andréia; Silva,Marlene Rodrigues da. |
| We evaluated the factors that affect the food resource use by Plagioscion ternetzi using three approaches: spatial, seasonal, and ontogenetic changes. Fish were sampled between March 2000 and February 2001 and March 2003 and February 2004 in the Sinhá Mariana and Chacororé lagoons, wetlands of the Pantanal Matogrossense. Fish was the predominant food in the diet, but shrimps and insects have been also consumed. The diet of P. ternetzi was significantly different between lagoons, but no difference was detected between dry and flood periods. In Sinhá Mariana lagoon, the diet mainly consisted of Psectrogaster curviventris, in both periods. In the flood period in Chacororé lagoon, fish was the dominant food (especially Astyanax spp., Leporinus spp. and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chacororé lagoon; Diet; Plagioscion ternetzi; Sciaenidae; Sinhá Mariana lagoon. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100163 |
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| Vaslet,Amandine; France,Christine; Baldwin,Carole C.; Feller,Ilka C.. |
| Foraging habitats of juveniles of the Mayan cichlid, Cichlasoma urophthalmus (Günther, 1862), were investigated in two mangrove ponds located in Twin Cays offshore islet in Belize: Sink Hole pond (SH) and Hidden Lake pond (HL). Sink Hole pond is a semiclosed body of water, whereas Hidden Lake pond is connected by a channel to adjacent seagrass beds that surround the islet. Gut contents of 21 juvenile C. urophthalmus (9.8-13.2 cm total length) were analyzed, and five prey taxa were identified. In both mangrove ponds, C. urophthalmus were opportunistic carnivores and consumed primarily crustaceans. Plant material and detritus present in gut contents were most likely ingested incidentally when the fish foraged on small invertebrates. Carbon isotopic values of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caribbean; Cichlidae; Diet; Seagrass beds; Stable isotopes. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300021 |
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| Corrêa,Carlos Eduardo; Albrecht,Miriam Pilz; Hahn,Norma Segatti. |
| Spatial and temporal variations in patterns of niche breadth and feeding overlap were investigated for the fish fauna in the Pantanal region, aiming to determine the factors that account for species coexistence. Samples were conducted in the Cuiabá River and Chacororé pond, in the upper Pantanal region, Mato Grosso State, Brazil, during one hydrological cycle (March 2000 to February 2001), (designed spatial-seasonal units). Mean niche breadth values were overall low for the fish assemblage (0.2-0.3). Differences between periods were not statistically significant. Feeding overlap values ranged between 0 and 0.4, whereas the mean was always inferior to 0.05 in all spatial-temporal units, and differences between periods were not statistically significant. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coexistence; Diet; Fishes; Floodplain; Pantanal. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300017 |
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| Giora,Júlia; Fialho,Clarice B.; Dufech,Ana Paula S.. |
| This study aims to describe the feeding habits of a population of the weakly electric fish Eigenmannia trilineata from Southern Brazil through the monthly frequency variation of replection (RI) and hepatosomatic (HSI) indexes, condition factor (CF) and dietary analysis of the species, besides the comparison of the results with abiotic factors. We collected 428 specimens from June/2002 to May/2003 with a dip net and electric fish detector. Stomach contents were analyzed using three measurements: frequency of occurrence of food items, percentage composition per prey type and feeding importance index. Microcrustacea and autochthonous insects were the dominant food items in the stomachs of E. trilineata. The adults (males larger than 63.5 mm and females larger... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gymnotiformes; Electric-fish; Diet; Southern Brazil. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000200007 |
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| Mérona,Bernard de; Rankin-de-Mérona,Judy. |
| Diets of most of fish species inhabiting a floodplain lake in central Amazonia were studied over a two years and half period. Based on the percentage of relative occurrence of 11 major food categories a classification of species in 11 feeding guilds is proposed. Many species were found to be specialized feeders. Fish, detritus and insects were the most important food resources supporting the fish community in both seasons, but the proportions of fruits, invertebrates and fish were reduced during the low water season. At the community level mean diet overlap between species was low, suggesting efficient resource partitioning within the community. However mean overlap between unspecialized feeders was high. Based on the 23 most abundant species belonging to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Varzea lake; Fishes; Diet; Overlap; Seasonal variability. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000200004 |
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| Silva,Jislaine Cristina da; Delariva,Rosilene Luciana; Bonato,Karine Orlandi. |
| This study addressed the feeding ecology of fish fauna from a first-order stream located in a rural area. The purposes were to evaluate the influence of interspecific, seasonal and spatial factors on the diet, examine the dietary overlap, and determine the predominant food sources. Sampling was conducted in December 2007, September 2008, and March 2009, in three 50-m stretches of Itiz stream (upstream, intermediate, and downstream), through electrofishing. A total of 1,102 stomach contents were analyzed from 14 species, by the volumetric method. In general, allochthonous resources were predominant in the diets. Astyanax aff. fasciatus, Astyanax aff. paranae, Astyanax bockmanni, and Bryconamericus aff. iheringi consumed a higher proportion of plant remains,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allochthonous resources; Diet; Fish fauna; Trophic segregation; Riparian vegetation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200014 |
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| Dufech,Ana Paula S.; Azevedo,Marco A.; Fialho,Clarice B.. |
| The diet of two populations of Mimagoniates rheocharis, from two freshwater streams of the rio Tramandaí, northeastern Rio Grande do Sul, Brazil, are described and compared. The specimens were collected monthly from January 1998 to March 1999, with dip nets and seine nets and preserved in 10% formalin. In laboratory, the standard length of each specimen was measured. The stomachs were removed and dissected for identification of the alimentary items. The data were analyzed using the frequency of occurrence, percent composition and index of alimentary importance methods, being the last two compared among different classes of standard length. Three methods of analysis showed the highest values for allochthonous insects, regardless the locality of collection... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding; Allochthonous insects; Rio Maquiné; Diet; Neotropical. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252003000100008 |
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| Brito, A. I.; Perea, J.. |
| El objetivo de este trabajo fue evaluar el efecto de diferentes estabilizadores sobre las principales características texturales de una leche fermentada hipocalórica con adición de salvado de trigo como fuente de fibra dietética insoluble. Se empleó una proporción de fibra de 5 g/100 g de producto, adicionándolo de conjunto con los estabilizadores a evaluar. Se realizó un diseño de experimentos con los dos estabilizadores a emplear a tres niveles para establecer el valor óptimo de empleo de los mismos, midiendo como variables respuestas: sedimentación de partículas, sinéresis, gelificación y consistencia del coágulo. Se concluyó que el almidón fosfato a 1,0 % y la gelatina a 0,5 % permitieron obtener las características texturales deseadas en la leche... |
| Tipo: Journal Contribution |
Palavras-chave: Food; Research (experimental); Mathematical models; Stabilizers; Fermented milk; Diet. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4885 |
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| FONSECA-PÉREZ,KIMBERLYN A.; MOLINA,CÉSAR; TÁRANO,ZAIDA. |
| ABSTRACT The coexistence of species with similar ecological requirements (food, space, time) has typically drawn attention of researchers because competition for resources is expected to be high. The diet and microhabitat occupation of two morphologically and ecologically similar species of Hylidae (Anura), Dendropsophus microcephalus and Scarthyla vigilans, were analyzed at a locality in north-western Venezuela, with the aim of addressing the potential for space and food competition between them. Diet was estimated through the analysis of stomach contents and microhabitat occupation was estimated through recordings of perch type, height and horizontal distance to water. Thirty-six prey categories (32 families, 4 orders) of arthropods were identified: 30... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Generalist; Niche overlap; Resource partitioning; Microhabitat; Morphometry. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492017000700093 |
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| Hartmann,Paulo A.; Hartmann,Marília T.; Martins,Marcio. |
| The main objective of this study was to examine the natural history and the ecology of the species that constitute a snake assemblage in the Atlantic Rainforest, at Núcleo Picinguaba, Parque Estadual da Serra do Mar, located on the northern coast of the state of São Paulo, southeastern Brazil. The main aspects studied were: richness, relative abundance, daily and seasonal activity, and substrate use. We also provide additional information on natural history of the snakes. A total of 282 snakes, distributed over 24 species, belonging to 16 genera and four families, has been found within the area of the Núcleo Picinguaba. Species sampled more frequently were Bothrops jararaca and B. jararacussu. The methods that yielded the best results were time constrained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Assemblage; Snake; Diet; Habitat use; Activity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492009002700001 |
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| Gaiarsa,Marília P.; Alencar,Laura R.V. de; Martins,Marcio. |
| Even though natural history information is crucial for answering key ecological, evolutionary, and conservation questions, basic studies are still lacking for Neotropical snakes. This study aims at contributing to the knowledge of the Neotropical tribe Pseudoboini, based on literature data, analysis of museum specimens and unpublished data. The tribe is mainly composed of moderate-sized snakes, although small and large-sized snakes also occur in the clade. Mean fecundity ranged from two (Rodriguesophis iglesiasi) to 29 eggs (Clelia plumbea) and the species are predominantly terrestrial and nocturnal. Most species are diet specialists and lizards are the most commonly consumed prey (found in the diet of 29 species), followed by small mammals (consumed by 20... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecology; Diet; Microhabitat; Reproduction; Dipsadidae. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492013001900001 |
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| Silva,Ana Maria Dias da; Gomes,Levy de Carvalho; Roubach,Rodrigo. |
| The objective of this work was to evaluate the effect of pond management on fish feed, growth, yield, survival, and water and effluent quality, during tambaqui (Colossoma macropomum) juvenile production. Fish were distributed in nine 600 m² earthen ponds, at a density of 8 fish per m²; the rearing period was 60 days. Three different pond management were applied: limed and fertilized (LimFer), limed (Lim), and natural (Nat). Fish were fed with a commercial ration containing 34% crude protein three times daily. There were no significant differences in fish growth or yield. Three main items found in tambaqui stomach were insect, zooplankton and ration, without a significant difference among treatments in proportion. Alkalinity, hardness, and CO2 were greater... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colossoma macropomum; Growth; Yield; Diet; Environmental impact. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000500017 |
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| Registros recuperados: 313 | |
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