scholarly journals Water depth selection during foraging and efficiency in prey capture by the egrets Casmerodius albus and Egretta thula (Aves, Ardeidae) in an urban lagoon in Rio de Janeiro State, Brazil

2005 ◽  
Vol 95 (1) ◽  
pp. 107-109 ◽  
Author(s):  
Aline B. Moreno ◽  
Adriano R. Lagos ◽  
Maria Alice S. Alves
Keyword(s):  
Water Depth ◽  
Significant Relationship ◽  
Rio De Janeiro ◽  
Prey Capture ◽  
Food Resources ◽  
Food Items ◽  
Egretta Thula ◽  
Janeiro State

This study aimed to evaluate the water depth selection during foraging, the efficiency in prey capture, and the food items captured by Casmerodius albus (Linnaeus, 1758) and Egretta thula (Molina, 1782). The work was conducted at an urban lagoon, Lagoa Rodrigo de Freitas, Rio de Janeiro. Four transects were made each month (two in the morning and two in the afternoon) for six months. When the birds were detected foraging, the water depth and the types of prey captured were recorded. There was no significant relationship between the foraging efficiencies of the two species. However, they differed in relation to the water depth when foraging, and also in the food items captured. Casmerodius albus captured mainly fishes while Egretta thula captured mainly invertebrates. The results suggest that the differences in water depth when foraging and the food items captured allow a differential use of the food resources available by C. albus and E. thula at Lagoa Rodrigo de Freitas.

scholarly journals Trophic niche comparison between two predators in northern Rio de Janeiro State, Brazil: a stable isotopes approach

2013 ◽  
Vol 13 (3) ◽  
pp. 29-33 ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Carlos Eduardo Rezende ◽  
Plínio Barbosa Camargo ◽  
Helena Amaral Kehrig
Keyword(s):  
Food Chain ◽  
Rio De Janeiro ◽  
Trophic Position ◽  
Food Resources ◽  
Trophic Niche ◽  
Eastern Brazil ◽  
Trichiurus Lepturus ◽  
Δ15n And Δ13c ◽  
Pontoporia Blainvillei ◽  
Janeiro State

The trophic niche of the sympatric predators Pontoporia blainvillei(franciscana dolphin) and Trichiurus lepturus (ribbonfish) was compared by stable isotope (δ15N and δ13C) ratios in hepatic and muscular tissues to understand how they co-exist in the northern Rio de Janeiro State (21°30′S-22°15′S), south-eastern Brazil. Dolphin specimens were incidentally captured through commercial gillnet fisheries, while fish specimens were the target of these fisheries. The predators had similar δ15N values in the liver (P. blainvillei: 14.6 ± 1.0‰; T. lepturus: 14.4 ± 0.6‰), which indicates similar trophic position in the recent food intake. However,P. blainvillei showed lighter δ15N values in muscle (13.8 ± 1.0‰) than T. lepturus (15.0 ± 0.4‰), revealing differences in the long term diet that could be related with the prey size ingested. The δ13C signatures showed a preferential inshore and benthic food chain for P. blainvillei (liver: −15.2 ± 0.6‰; muscle: −16.0 ± 0.5‰) and a more offshore and pelagic food chain for T. lepturus(liver: −17.2 ± 0.6‰; muscle: −16.8 ± 0.3‰). The isotopic variances of liver and muscle revealed a broader niche width to P. blainvillei in relation to T. lepturus, with a greater use of available food resources in coastal waters. In the area of study, the differences in habitat use and exploitation of food resources are favoring the predators' coexistence.

scholarly journals Isotopic niche of the catfishes Bagre bagre and Genidens barbus in a coastal area of south-eastern Brazil

2018 ◽  
Vol 18 (3) ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Maria Thereza Manhães Tavares ◽  
Leandro Rabello Monteiro
Keyword(s):  
Coastal Area ◽  
Rio De Janeiro ◽  
Niche Overlap ◽  
Isotopic Niche ◽  
Food Items ◽  
South Eastern ◽  
Eastern Brazil ◽  
Xiphopenaeus Kroyeri ◽  
The Mean ◽  
Janeiro State

Abstract: The isotopic niche of Bagre bagre and Genidens barbus target of commercial fisheries in a marine coastal area from northern Rio de Janeiro State (~21ºS), south-eastern Brazil was compared to evaluate the feeding assimilation and the trophic relationship. The mean isotopic values of the catfishes and their food items in the δ13C-δ15N space were coherent with their respective trophic positions. The relative contributions of the food items highlighted the shrimp Xiphopenaeus kroyeri as the most assimilated item in the diet of B. bagre, while for G. barbus the model highlighted the fish Porichthys porosissimus. The absence of niche overlap together with the trophic evenness point to a reduced feeding overlap between B. bagre and G. barbus in northern Rio de Janeiro State.

scholarly journals Visits of bats to flowers of Lafoensia glyptocarpa KOEHNE (LYTHRACEAE)

1999 ◽  
Vol 59 (1) ◽  
pp. 19-22 ◽  
Author(s):  
S. S. P. SILVA ◽  
A. L. PERACCHI
Keyword(s):  
Tree Species ◽  
Rio De Janeiro ◽  
Food Resources ◽  
Behavior Patterns ◽  
Glossophaga Soricina ◽  
Phyllostomus Hastatus ◽  
Artibeus Lituratus ◽  
Landing Behavior ◽  
Janeiro State

In the present study visits of phyllostomid bats to the Lafoensia glyptocarpa Kohne flowers were observed at Federal Rural University of Rio de Janeiro, Itaguaí municipality, Rio de Janeiro state. This tree species present floral characteristics to fit the "chiropterophilous syndrome", encouraging the visit of four species of bats which showed different behavior patterns, according to their size, weight and access to the food resources. Glossophaga soricina (Pallas, 1766) showed hovering behavior. Phyllostomus hastatus (Pallas, 1767) and Platyrrhinus lineatus (Geoffroy, 1810) showed landing behavior and Artibeus lituratus (Olfers, 1818) fed during the quick flight, without a real landing.

scholarly journals Forrageio diurno de Odontomachus bauri Emery (Hymenoptera: Formicidae) em plantio de Eucalyptus sp. no município de Volta Redonda-RJ

2017 ◽  
Vol 10 (3) ◽  
pp. 143-147
Author(s):  
Gustavo Correiro Amaral ◽  
André Barbosa Vargas ◽  
Fábio Souto Almeida
Keyword(s):  
Air Temperature ◽  
Rio De Janeiro ◽  
Food Resources ◽  
Foraging Activity ◽  
Generalist Species ◽  
Eucalyptus Plantation ◽  
The City ◽  
Janeiro State

Resumo. O estudo da atividade de forrageio diurno de Odontomachus bauri Emery (Hymenoptera: Formicidae) em um plantio de Eucalyptus sp. foi realizado na Fazenda Volta Redonda localizada no município de Volta Redonda, Rio de Janeiro. Para as observações foram demarcados três ninhos distantes no mínimo 50 m entre si. Estes foram monitorados alternadamente a cada 20 min., ao longo do dia no período de 6:00 h às 18:00 h totalizando 108 horas em nove dias no período de abril a agosto de 2015. As saídas dos ninhos foram mais frequentes no período da tarde (35%), e a chegada com recurso alimentar acontecia ao longo do dia com maior frequência no período da manhã. Dentre a diversidade dos itens coletadosestão insetos de várias ordens, sementes, folhas, flores e aranhas, demonstrando um ecletismo alimentar peculiar do gênero. Os itens mais coletados foram pupas de insetos e sementes. A espécie O. bauri apresentou um padrão de atividade similar ao já descrito na literatura, entretanto, demonstrou maior atividade ao final da manhã, acompanhando o aumento de temperatura.Daytime foraging of Odontomachus bauri Emery in eucalyptus plantation in the municipality of Volta Redonda, Rio de Janeiro State, BrasilAbstract. The study of Odontomachus bauri Emery (Hymenoptera: Formicidae) daytime foraging activity in a plantation of Eucalyptus sp. was conducted in the Farm Volta Redonda, located in the city of Volta Redonda, Rio de Janeiro State, Brazil. Three nests were marked for observations. The nests were distant more than 50 m apart. These were monitored alternately every 20 min. throughout the day in the period of 6:00 h to 18:00 h. In total, the nests were monitored by 108 hours. The outputs of the ants of the nests were higher in the afternoon (35%), but the arrival with some kind of food resources was happening throughout the day more often in the morning. Amongst the diversity of items collected by O. bauri are insects of various orders, seeds, leaves, flowers and spiders. The most collected items were pupae of insects and seeds. The activity of this species was positively affected by air temperature. Thus, O. bauri shown a generalist species with foraging activity at the end of the morning, accompanying the increase in temperature.

scholarly journals High Uranium Concentrations in the Groundwater of the Rio de Janeiro State, Brazil, Mountainous Region

2018 ◽  
Author(s):  
José Godoy ◽  
Paulo Ferreira ◽  
Elder de Souza ◽  
Larisse da Silva ◽  
Isabela Bittencourt ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Mountainous Region ◽  
Janeiro State

A new species of Gonyleptellus Roewer, 1930 from the mountains of Rio de Janeiro State, Brazil (Opiliones: Gonyleptidae)

2020 ◽  
Vol 54 (29-30) ◽  
pp. 1947-1956
Author(s):  
Ludson Neves de Ázara ◽  
Miguel Medrano ◽  
Adriano Brilhante Kury
Keyword(s):  
New Species ◽  
Rio De Janeiro ◽  
A New Species ◽  
Janeiro State

scholarly journals Características sociodemográficas e clínicas de pacientes portadoras de cardiomiopatia periparto: contribuições para a enfermagem [Sociodemographic and clinical characteristics of peripartum cardiomyopathy patients: contributions to nursing] [Características sociodemográficas y clínicas de pacientes portadoras de cardiomiopatía periparto: contribuciones a la enfermería]

2018 ◽  
Vol 26 ◽  
pp. e32033
Author(s):  
Tamires Grama dos Santos ◽  
Karla Biancha Silva de Andrade ◽  
Flávia Giron Camerini ◽  
Andrezza Serpa Franco ◽  
Ana Lúcia Cascardo Marins ◽  
...  
Keyword(s):  
Skin Color ◽  
Rio De Janeiro ◽  
Clinical Characteristics ◽  
Peripartum Cardiomyopathy ◽  
University Hospital ◽  
Respiratory Pattern ◽  
Cross Sectional ◽  
Documentary Analysis ◽  
Cardiac Intensive Care ◽  
Janeiro State

Objetivo: identificar as características clínicas e sociodemográficas das pacientes portadoras de cardiomiopatia periparto em unidade cardiointensiva de um hospital universitário no Estado do Rio de Janeiro. Método: estudo quantitativo, transversal, de análise documental em cinco prontuários, entre janeiro de 2014 a dezembro de 2016, obedecendo aos critérios preestabelecidos de inclusão e exclusão e iniciado após aprovação do Comitê de Ética e Pesquisa. Os dados foram coletados mediante um formulário próprio, tabulados em planilhas eletrônicas e analisados através de estatística descritiva simples. Resultados: houve predominância de idade entre 26-35 anos – 4 (80%), multíparas, etnia parda, internação para pós-operatório de parto cesárea – 4 (80%), internação inferior a 2 semanas 4 (80%). Dentre os problemas de enfermagem encontrados, estão o débito cardíaco diminuído e padrão respiratório ineficaz. Conclusão: divulgar as características sociodemográficas e clínicas dessa clientela pode ajudar a delimitar alguns problemas de enfermagem representativos nessa população.ABSTRACTObjective: to identify the clinical and sociodemographic characteristics of patients with peripartum cardiomyopathy in a cardiac intensive care unit of a university hospital in Rio de Janeiro State. Method: this quantitative, cross-sectional, documentary analysis studied five medical records, between January 2014 and December 2016, according to pre-established inclusion and exclusion criteria, after approval by the research ethics committee. Data were collected using a specific form, tabulated in electronic spreadsheets, and analyzed by simple descriptive statistics. Results: subjects were aged predominantly 26-35 years (4; 80%), multiparous, skin color brown, admitted for caesarean section postoperative care (4; 80%), and for less than 2 weeks (4; 80%). The nursing problems encountered included decreased cardiac output and ineffective respiratory pattern. Conclusion: disclosure of this clientele’s sociodemographic and clinical characteristics can help to delimit some representative nursing problems in this population.RESUMENObjetivo: identificar las características clínicas y sociodemográficas de las pacientes portadoras cardiomiopatía periparto en una unidad de cuidados intensivos coronarios de un hospital universitario en el Estado de Río de Janeiro. Método: estudio cuantitativo, transversal, de análisis documental en cinco historias clínicas, entre enero de 2014 y diciembre de 2016, obedeciendo a los criterios preestablecidos de inclusión y exclusión e iniciado tras la aprobación del Comité de Ética en Investigación. Los datos fueron recolectados a través de un formulario propio, tabulados en planillas electrónicas y analizados a través de estadística descriptiva simple Resultados: hubo predominancia de edad entre 26 y 35 años – 4 (80%), multíparas, etnia parda, internación para postoperatorio de parto cesárea - 4 (80%), internación inferior a 2 semanas – 4 (80%). Entre los problemas de enfermería encontrados, están el débito cardíaco disminuido y el patrón respiratorio ineficaz. Conclusión: divulgar las características sociodemográficas y clínicas de esa clientela puede ayudar a delimitar algunos problemas de enfermería representativos en esa población.

Organochlorine compound accumulation in delphinids from Rio de Janeiro State, southeastern Brazilian coast

2012 ◽  
Vol 433 ◽  
pp. 123-131 ◽  
Author(s):  
José Lailson-Brito ◽  
Paulo R. Dorneles ◽  
Cláudio E. Azevedo-Silva ◽  
Tatiana L. Bisi ◽  
Lara G. Vidal ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Organochlorine Compound ◽  
Brazilian Coast ◽  
Janeiro State

scholarly journals The snake community of Serra do Mendanha, in Rio de Janeiro State, southeastern Brazil: composition, abundance, richness and diversity in areas with different conservation degrees

2009 ◽  
Vol 69 (3) ◽  
pp. 795-804 ◽  
Author(s):  
JAL. Pontes ◽  
RC. Pontes ◽  
CFD. Rocha
Keyword(s):  
Rio De Janeiro ◽  
Secondary Forest ◽  
Southeastern Brazil ◽  
Future Research ◽  
Native Forest ◽  
Abundance Distribution ◽  
Forested Areas ◽  
Undisturbed Forest ◽  
Banana Plantations ◽  
Janeiro State

We studied and compared parameters of the snake community of the Serra do Mendanha, Rio de Janeiro State, southeastern Brazil (22º 48'-22º 51' S and 43º 31'-43º 28' W), such as: abundance distribution, richness, species diversity and biomass, between forested areas, areas under regeneration and agriculture areas (banana plantations); to obtain information about the natural history and facilitate the development of future research. For capturing the snakes we used: pitfall traps, drift-fences and visual search (diurnal and nocturnal) along four transects for each habitat. The captured snakes were measured with a tape and caliper, weighed with dynamometers and sexed with the use of a catheter. The animals marked (with ventral scales cut) were released for posterior recapture. One individual per species was fixed and deposited at the Museu Nacional, Rio de Janeiro. We undertook an effort of 840 man/hour, and captured a total of 207 snakes belonging to 25 species (Colubridae 80.2%, Elapidae 12.6%, Viperidae 6.3% and Boidae 0.9%). The most abundant were: Liophis miliaris (n = 33), Micrurus corallinus and Chironius fuscus (both with n = 26); the least abundant: Elapomorphus quinquelineatus, Siphlophis compressus and Tropidodryas serra (all with n = 1). The species that contributed the greatest biomass were Spilotes pullatus (7,925 g), Chironius laevicollis (4,694 g), Liophis miliaris (3,675 g) and Pseustes sulphureus (3,050 g); those that contributed the lowest biomass were: Siphlophis compressus, Tropidodryas serra (both with 4 g) and Elapomorphus quinquelineatus (3 g). We found significant differences between the sampled habitats at the Serra do Mendanha (undisturbed forest, secondary forest and banana plantations). The results showed that a great reduction in the abundance, richness, diversity and biomass of the snakes occurs when the native forest is replaced by banana plantations.

Sign in / Sign up

Export Citation Format

Share Document