Diel and seasonal patterns of foraging activity in the arboreal ant Crematogaster matsumurai Forel

Exclusive to the Neotropical region, leaf cutter ants are considered agricultural pests, although they can also have a positive effect on plants. In Mendoza vineyards, vegetal biodiversity is minimal, therefore they cut off this plant as a feeding resource. Acromyrmex lobicornis Emery it is mostly nocturnal and forages according to temperature. Foraging and maintenance activity was measured monthly in 14 colonies, throughout a full day at fourhour intervals, from October 2019 to March 2020. Acromyrmex lobicornis showed different seasonal patterns of foraging activity. Foraging intensity was highest throughout January and February, intermediate during December, and lowest in October and November. A bimodal feeding pattern was observed, foraging both day and night avoiding the hottest hours. The maximum collection of fragments was observed in the range of 10 and 19 °C, less between 20 - 39 °C, minimum between 40 - 49 °C and null between 0 - 9 °C. The nest - maintenance activity was maximum between 20 - 29 °C, less between 30 - 39 ° C, minimum between 40 - 49 °C and null between 0 - 20 °C.

Download Full-text

Seasonal patterns of body temperature and activity in free-ranging muskrats (Ondatra zibethicus)

Canadian Journal of Zoology ◽

10.1139/z79-005 ◽

1979 ◽

Vol 57 (1) ◽

pp. 25-33 ◽

Cited By ~ 20

Author(s):

Robert A. MacArthur

Keyword(s):

Body Temperature ◽

Seasonal Patterns ◽

Foraging Activity ◽

Ondatra Zibethicus ◽

Winter Foraging ◽

Body Cooling ◽

Free Ranging ◽

The Relationship ◽

Foraging Time

Radiotelemetry techniques were employed to study the relationship between activity and abdominal temperature (Tb) changes in free-ranging muskrats (Ondatra zibethicus). Body cooling accompanied foraging activity by adults in winter and juveniles in summer and was retarded by periodic withdrawal from water. Net Tb decline during winter foraging rarely exceeded 2 °C and was relatively independent of foraging time for excursions exceeding 40 min duration. In addition to periodic rewarming within feeding shelters, muskrats appeared to avoid hypothermia during under-ice excursions by elevating Tb prior to entering water. This elevation was maximal (mean increase = 1.2 °C) for excursions exceeding 40 min duration. Comparable increases were not observed in summer.

Download Full-text

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

Sociobiology ◽

10.13102/sociobiology.v64i3.1629 ◽

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.

Download Full-text

Seasonal patterns of foraging activity in colonies of the African honey bee,Apis mellifera scutellata, in Africa

Insectes Sociaux ◽

10.1007/bf01249293 ◽

1992 ◽

Vol 39 (2) ◽

pp. 181-193 ◽

Cited By ~ 12

Author(s):

S. S. Schneider ◽

L. C. McNally

Keyword(s):

Apis Mellifera ◽

Honey Bee ◽

Seasonal Patterns ◽

Foraging Activity ◽

Apis Mellifera Scutellata ◽

African Honey Bee

Download Full-text

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

Crisis ◽

10.1027/0227-5910/a000222 ◽

2014 ◽

Vol 35 (1) ◽

pp. 5-9 ◽

Cited By ~ 10

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.

Download Full-text

Butinage: The Art of Religious Mobility

10.3138/9781487538989 ◽

2021 ◽

Author(s):

Yonatan N Gez ◽

Yvan Droz ◽

Jeanne Rey ◽

Edio Soares

Keyword(s):

Conceptual Framework ◽

Religious Practice ◽

Ethnographic Research ◽

Religious Institutions ◽

Foraging Activity ◽

French Word ◽

Pollinating Insects ◽

Shed Light

Based on comparative ethnographic research in four countries and three continents, Butinage: The Art of Religious Mobility explores the notion of "religious butinage" as a conceptual framework intended to shed light on the dynamics of everyday religious practice. Derived from the French word butiner, which refers to the foraging activity of bees and other pollinating insects, this term is employed by the authors metaphorically to refer to the "to-ing and fro-ing" of believers between religious institutions.

Download Full-text