Seasonal Patterns in Activity Rhythm and Foraging Ecology in the Neotropical Forest-Dwelling Ant, Odontomachus chelifer (Formicidae: Ponerinae)

2009 ◽  
Vol 102 (6) ◽  
pp. 1151-1157 ◽  
Author(s):  
Rafael L. G. Raimundo ◽  
André V. L. Freitas ◽  
Paulo S. Oliveira
Keyword(s):  
Foraging Ecology ◽  
Activity Rhythm ◽  
Seasonal Patterns ◽  
Neotropical Forest ◽  
Odontomachus Chelifer

scholarly journals Seasonal Patterns of the Foraging Ecology of Myrmelachista arthuri Forel, 1903 (Formicidae: Formicinae)

Sociobiology ◽  
2017 ◽  
Vol 64 (3) ◽  
pp. 237
Author(s):  
Gustavo Henrique Castro ◽  
Débora Yumi Kayano ◽  
Rodrigo Fernando Souza ◽  
Alexandre Wagner Hilsdorf ◽  
Rodrigo Machado Feitosa ◽  
...  
Keyword(s):  
Temporal Dynamics ◽  
Foraging Ecology ◽  
Seasonal Patterns ◽  
Forest Trees ◽  
Foraging Activity ◽  
Plant Materials ◽  
Food Items ◽  
Neotropical Species ◽  
Generalist Diet ◽  
Worker Activity

Temporal dynamics of foraging activity, diet and habitat are key to understanding the bioecology of ants. These patterns are poorly studied in many Neotropical species, such as those belonging to genus Myrmelachista. In the present work, we investigate the foraging behavior and diet of M. arthuri and describe aspects of their food-searching behavior. We recorded the dynamics of workers exiting and entering nests built in the stems of native Atlantic forest trees during the cold/dry and warm/wet seasons. Food items carried by workers were also counted and identified. Myrmelachista arthuri foraged throughout the day, but worker activity became more intense as temperature increased and moisture declined, regardless of the season, and especially in the afternoon. This species had a generalist diet: 92% of the food items were live or dead arthropods or their remains, and a small proportion consisted of plant materials, such as seeds. Arthropod fragments, mostly of M. arthuri workers, represented the largest proportion of the diet, followed by whole Collembola individuals. Food items did not vary between seasons, the number of items was higher in the cold/dry season. The results of this work contribute to the understanding of M. arthuri biology, especially related to foraging dynamics.

Seasonal Patterns of Host Plant Use in an Assemblage of Heliconiini Butterflies (Lepidoptera: Nymphalidae) in a Neotropical forest

2021 ◽  
Author(s):  
Renato Rogner Ramos ◽  
Ronaldo Bastos Francini ◽  
Mohamed Ezz El-Din Mostafa Habib ◽  
André Victor Lucci Freitas
Keyword(s):  
Host Plant ◽  
Seasonal Patterns ◽  
Plant Use ◽  
Neotropical Forest ◽  
Host Plant Use

Seasonal Variation of Suicide in the City of São Paulo, Brazil, 1996–2010

Crisis ◽  
2014 ◽  
Vol 35 (1) ◽  
pp. 5-9 ◽  
Author(s):  
Daniel Hideki Bando ◽  
Fernando Madalena Volpe
Keyword(s):  
Seasonal Pattern ◽  
Total Sample ◽  
Sao Paulo ◽  
Seasonal Patterns ◽  
São Paulo ◽  
Health Statistics ◽  
Males And Females ◽  
June July ◽  
The City ◽  
Over Time

Background: In light of the few reports from intertropical latitudes and their conflicting results, we aimed to replicate and update the investigation of seasonal patterns of suicide occurrences in the city of São Paulo, Brazil. Methods: Data relating to male and female suicides were extracted from the Mortality Information Enhancement Program (PRO-AIM), the official health statistics of the municipality of São Paulo. Seasonality was assessed by studying distribution of suicides over time using cosinor analyses. Results: There were 6,916 registered suicides (76.7% men), with an average of 39.0 ± 7.0 observed suicides per month. For the total sample and for both sexes, cosinor analysis estimated a significant seasonal pattern. For the total sample and for males suicide peaked in November (late spring) with a trough in May–June (late autumn). For females, the estimated peak occurred in January, and the trough in June–July. Conclusions: A seasonal pattern of suicides was found for both males and females, peaking in spring/summer and dipping in fall/winter. The scarcity of reports from intertropical latitudes warrants promoting more studies in this area.

scholarly journals Contrasting tree-cover loss and subsequent land cover in two neotropical forest regions: sample-based assessment of the Mexican Yucatán and Argentine Chaco

2018 ◽  
Vol 13 (6) ◽  
pp. 549-564 ◽  
Author(s):  
Alexander Krylov ◽  
Marc K. Steininger ◽  
Matthew C. Hansen ◽  
Peter V. Potapov ◽  
Stephen V. Stehman ◽  
...  
Keyword(s):  
Land Cover ◽  
Tree Cover ◽  
Neotropical Forest ◽  
Forest Regions
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