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| Registros recuperados: 233 | |
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| Fontoura,Pedro Luiz; Ribeiro,Luiz Fernando; Pie,Marcio Roberto. |
| Saddleback toads (Brachycephalidae: Brachycephalus) are a remarkable group of highly endemic species from the southern Atlantic Rainforest of Brazil. They are brightly colored, diurnal, minute frogs that live in the leaf litter of high-elevation cloud forests. Little is known about the natural history of these frogs, particularly their diet. In the present study we provide the first published account of a Brachycephalus species diet. Specimens of Brachycephalus brunneus Ribeiro, Alves, Haddad & Reis, 2005 (N = 20) were collected from two locations in the Serra do Mar mountain range in the state of Paraná, southern Brazil. A total of 137 food items were recorded, with Acari being the most common item (62.4%). This prevalence is much higher than the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acari; Feeding; Foraging; Litter frog. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500019 |
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| 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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| Alves, Gustavo Henrique Zaia; Tófoli, Raffael Marcos; Ganassin, Maria Julia Mileo; Hahn, Norma Segatti. |
| This study aimed to assess the diet of Poecilia reticulata in rural (RS) and urban stream (US) and under seasonal influence. We hypothesized that rainfall have a strong negative impact on the diet of the species in the US, due to its abrupt effect on food resources; in RS this effect is less apparent. Both streams belong to Pirapó River sub-basin, Paraná River basin. Fishes were sampled bimonthly, between July 2007 and June 2008 in three sample sites along the longitudinal gradient of the streams, using electrofishing. According to the Feeding Index, in both streams the population consumed almost exclusively detritus associated with aquatic organisms (>95%), regardless of the hydrological period. The main taxa explored by fish were Simuliidae in RS and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecologia de ecossistemas benthivorous fish; Feeding; Macroinvertebrates; Anthropic impact; Paraná River basin Ecologia alimentar de peixes. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/29881 |
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| Trindade,Márcia Emília de Jesus; Jucá-Chagas,Ricardo. |
| Serrasalmus brandtii and Pygocentrus piraya are two common piranha species in the Barragem da Pedra Reservoir, rio de Contas. In order to identify the diet composition of the two species, monthly collections were performed at three sites between May 2001 and April 2003, using two gill nets of different mesh sizes cast at the beginning of the day and visited after 6, 12 and 24 h. The qualitative composition of the diet was analyzed by determining the frequency of occurrence. Comparison of the two species showed a higher relative abundance of S. brandtii (151) compared to P. piraya (55). The food items most frequently found in the stomachs of the two species were fins, fish and shrimp. Serrasalmus brandtii showed a greater feeding plasticity than P. piraya. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical; Feeding; Piranha; Reservoir. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400013 |
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| Renzi, M.A.. |
| The "abadejo" is one of the species that has been traditionally exploited in the Argentine Sea. Although the capture was not very important, it has been increased in the last years. In this work, the structure of the concentration areas of summer, spring and winter distribution and other biological items were analyzed, basing on the data collected during cruises effected by R/V "Walther Herwing" and R/V "Shinkai Maru" in these waters during 1978/79. Winter and spring distribution patterns showed the highest concentrations located between 41º and 48º SL, specially on the slope. Summer distribution pattern showed the concentration areas located between 43º30' and 48º30' LS shifted rather to the coast when comparing to the previous one. During the winter, in... |
| Tipo: Theses and Dissertations |
Palavras-chave: Geographical distribution; Population structure; Feeding; Length-weight relationships; Stomach content; Diets; Seasonal distribution. |
| Ano: 1982 |
URL: http://hdl.handle.net/1834/5028 |
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| Llanes Iglesias, J.; Toledo Pérez, J.. |
| Se evaluaron cuatro niveles de alimentación en el comportamiento productivo de Clarias gariepinus (8,0 + 0,01 g de peso medio inicial) en la etapa de preceba, mediante un diseño completamente aleatorizado. Los tratamientos fueron: TI- Pienso vegetal al 5 % del peso corporal; TII- Pienso vegetal al 3 % y desechos pesqueros al 2 % del peso corporal; TIII- Pienso vegetal al 3 % y desechos pesqueros al 2 % en base seca (que representó el 6 % en base húmeda) del peso corporal y TIV- Pienso vegetal y desechos pesqueros según Tabla del Laboratorio de Nutrición. Los mejores crecimientos (p < 0,001) se encontraron con los tratamientos TIII y TIV (111,2 y 116 g de pesos finales, respectivamente), los que se correspondieron con los niveles de alimentación más... |
| Tipo: Journal Contribution |
Palavras-chave: Fish wastes; Feeding. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5705 |
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| Seiffert,M.E.B.; Cerqueira,V.R.; Madureira,L.A.S.. |
| The effect of rotifers, Brachionus rotundiformis (S-type), fed three different diets: A (rotifer fed Nannochloropsis oculata), B (rotifer fed N. oculata and baker's yeast, 1:1), and C (rotifer fed N. oculata and baker's yeast, 1:1, and enriched with Selco<FONT FACE="Symbol">â</FONT>), was evaluated based on the survival, growth and swim bladder inflation rate of fat snook larvae. Rotifers of treatment A had higher levels (4.58 mg/g dry weight) of eicosapentaenoic acid (EPA) than B (1.81 mg/g dry weight), and similar levels (0.04 and 0.06 mg/g dry weight, respectively) of docosahexaenoic acid (DHA). Rotifers of treatment C had the highest levels of EPA (13.2 mg/g dry weight) and DHA (6.08 mg/g dry weight). Fat snook eggs were obtained by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Larvae; Centropomus parallelus; Feeding; Highly unsaturated fatty acid. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500013 |
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| Registros recuperados: 233 | |
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