Nest-Activity Patterns and Food-Provisioning Rates by Great Egrets (Ardea alba)

Waterbirds ◽  
2010 ◽  
Vol 33 (4) ◽  
pp. 504-510 ◽  
Author(s):  
Alan D. Maccarone ◽  
John N. Brzorad ◽  
Heather M. Stone
Keyword(s):  
Activity Patterns ◽  
Food Provisioning ◽  
Ardea Alba ◽  
Nest Activity

scholarly journals Reproductive behavior of White-tailed Kites (Elanus leucurus) in the Pampas of Argentina

2019 ◽  
Vol 27 (3) ◽  
pp. 153-157
Author(s):  
Alejandro V. Baladrón ◽  
Matilde Cavalli ◽  
Matías G. Pretelli ◽  
María S. Bó
Keyword(s):  
North America ◽  
Species Distribution ◽  
Reproductive Behavior ◽  
Activity Patterns ◽  
Behavioral Pattern ◽  
Nest Construction ◽  
Food Provisioning ◽  
Breeding Behavior ◽  
Time Activity ◽  
Nearctic Region

AbstractThe White-tailed Kite (Elanus leucurus) is a raptor that has been less studied in the Neotropics than in the Nearctic region, especially in relation to its reproductive behavior. In this study, we report information about the phenology and activity patterns of this raptor at the Pampas of Argentina. We found that White-tailed Kites have a prolonged breeding season, from October to May. Time-activity budgets of mating pairs indicated a pronounced division of roles in parental care between sexes. Females devoted most of their time to nest construction, incubation and chick care (80% of total time) and males to food provisioning and vigilance (70% of total time). We registered 11 cases of prey transfer from the male to the female. In four cases the transfer occurred in flight and in the remaining seven cases while individuals were perched. Our results agree with general patterns on breeding behavior of White-tailed Kites from North America, suggesting a consistent behavioral pattern throughout the species’ distribution.

Foraging ecology of the night-active bull ant Myrmecia pyriformis

2013 ◽  
Vol 61 (2) ◽  
pp. 170 ◽  
Author(s):  
Samuel F. Reid ◽  
Ajay Narendra ◽  
Robert W. Taylor ◽  
Jochen Zeil
Keyword(s):  
Visual System ◽  
Foraging Ecology ◽  
Activity Patterns ◽  
Colony Founding ◽  
Liquid Food ◽  
Mating Season ◽  
Wild Populations ◽  
Ecological Information ◽  
Light Levels ◽  
Nest Activity

Here we report on the nocturnal bull ant Myrmecia pyriformis, a species whose activity to and from the nest is mainly restricted to the dawn and dusk twilight respectively. Recent research on M. pyriformis has focussed on its visual system, the timing of activity patterns, and the navigational strategies employed by individuals while foraging. There is, however, a lack of basic ecological information about this species. The present study describes the behaviour and foraging ecology of wild populations of M. pyriformis. We find that most foragers make only one foraging journey per night, leaving the nest at dusk twilight and returning during dawn twilight. Individuals who make multiple trips typically return with prey. We provide evidence that foragers imbibe liquid food while abroad and likely share these resources via trophallaxis once within the nest. Activity during the night varies with moon illumination, and we postulate that this is due to changes in light levels, which influence navigation to and from the nest. This hypothesis is supported by observations of activity during overcast conditions. Finally, we also describe some aspects of colony founding, colony demise and the behaviour of reproductive individuals during the mating season.

Activity Patterns of Snowy Egrets (Egretta thula) and Great Egrets (Ardea alba):A Seasonal Comparison

Waterbirds ◽  
2013 ◽  
Vol 36 (1) ◽  
pp. 11-19 ◽  
Author(s):  
John n. Brzorad ◽  
Alan D. Maccarone
Keyword(s):  
Activity Patterns ◽  
Ardea Alba ◽  
Egretta Thula

Harpy Eagle Harpia harpyja nest activity patterns: Potential ecotourism and conservation opportunities in the Amazon Forest

2021 ◽  
pp. 1-15
Author(s):  
EVERTON B. P. MIRANDA ◽  
CAIO F. KENUP ◽  
CHARLES A. MUNN ◽  
NIKI HUIZINGA ◽  
NICKOLAS LORMAND ◽  
...  
Keyword(s):  
Wildlife Conservation ◽  
Activity Patterns ◽  
Daily Basis ◽  
Local Communities ◽  
Camera Traps ◽  
Amazon Forest ◽  
Apex Predators ◽  
Nest Activity ◽  
Harpia Harpyja ◽  
Potential Tool

Summary Tourism can be a powerful tool for wildlife conservation if well controlled and responsibly managed. Apex predators constitute particularly attractive subjects for tourism, but simultaneously they may generate conflict with local communities. Harpy Eagles Harpia harpyja are the largest eagle species and are highly sought-after by ecotourists. The last stronghold of the Harpy Eagle is the Amazon Forest, which is being deforested for cattle ranching. We tested methods for developing Harpy Eagle ecotourism as a potential tool to harmonize these issues. Using camera traps, we collected data on timing of Harpy Eagle visits to their nests, as well as on probabilities of viewing an eagle. Harpy Eagles can only be seen predictably during the first 12 of the 30–36 month nest cycle. In nests with nestlings (up to 5–7 months), adults are visible on a daily basis, and this period lasts 16.6% of the nesting cycle, demanding a minimum of 13, 17, and 26 nests to have at least one nest with a nestling on 90%, 95% and 99% of the days. After this 5–7 month window, we found that two and 4.16 days spent at nests afforded high probabilities of sighting a fledgling or adult eagle, respectively. Harpy Eagles were mainly active at the beginning and the end of the day. Activity core lasted 6.5 decimal hours for adults, peaking at 10h00, and 7.45 decimal hours for fledged eagles, peaking at 15h00. Our results demonstrate that Harpy Eagles fit several criteria for a viable wildlife attraction: predictable in activity and location, viewable, and diurnal, even though at the same time they are considered a rarity. In a broader perspective, Harpy Eagle tourism shows every indication of being a significant tool for more robust rainforest conservation.

scholarly journals Activity Patterns during Food Provisioning Are Affected by Artificial Light in Free Living Great Tits (Parus major)

PLoS ONE ◽  
2012 ◽  
Vol 7 (5) ◽  
pp. e37377 ◽  
Author(s):  
Mieke Titulaer ◽  
Kamiel Spoelstra ◽  
Cynthia Y. M. J. G. Lange ◽  
Marcel E. Visser
Keyword(s):  
Activity Patterns ◽  
Parus Major ◽  
Artificial Light ◽  
Food Provisioning ◽  
Free Living

Predicting spatial activity patterns in a neural map from a probabilistic atlas of 3-D reconstructed neurons

1995 ◽  
Vol 53 ◽  
pp. 812-813
Author(s):  
G. Jacobs ◽  
F. Theunissen
Keyword(s):  
Activity Patterns ◽  
Three Dimensional ◽  
Sensory System ◽  
Neural System ◽  
Probabilistic Atlas ◽  
Uniform Sample ◽  
Dimensional Reconstruction ◽  
The Time Domain ◽  
And Function ◽  
Visualization Techniques

In order to understand how the algorithms underlying neural computation are implemented within any neural system, it is necessary to understand details of the anatomy, physiology and global organization of the neurons from which the system is constructed. Information is represented in neural systems by patterns of activity that vary in both their spatial extent and in the time domain. One of the great challenges to microscopists is to devise methods for imaging these patterns of activity and to correlate them with the underlying neuroanatomy and physiology. We have addressed this problem by using a combination of three dimensional reconstruction techniques, quantitative analysis and computer visualization techniques to build a probabilistic atlas of a neural map in an insect sensory system. The principal goal of this study was to derive a quantitative representation of the map, based on a uniform sample of afferents that was of sufficient size to allow statistically meaningful analyses of the relationships between structure and function.

Inducing Unconscious Stress

2020 ◽  
Vol 34 (3) ◽  
pp. 192-201
Author(s):  
Melanie M. van der Ploeg ◽  
Jos F. Brosschot ◽  
Markus Quirin ◽  
Richard D. Lane ◽  
Bart Verkuil
Keyword(s):  
Repeated Measures ◽  
Activity Patterns ◽  
Physiological Changes ◽  
Implicit Measures ◽  
Prime Word ◽  
Student Sample ◽  
Priming Task ◽  
Subject Design ◽  
The Relationship ◽  
Stress And Health

Abstract. Stress-related stimuli may be presented outside of awareness and may ultimately influence health by causing repetitive increases in physiological parameters, such as blood pressure (BP). In this study, we aimed to corroborate previous studies that demonstrated BP effects of subliminally presented stress-related stimuli. This would add evidence to the hypothesis that unconscious manifestations of stress can affect somatic health. Additionally, we suggest that these findings may be extended by measuring affective changes relating to these physiological changes, using measures for self-reported and implicit positive and negative affectivity. Using a repeated measures between-subject design, we presented either the prime word “angry” ( n = 26) or “relax” ( n = 28) subliminally (17 ms) for 100 trials to a student sample and measured systolic and diastolic BP, heart rate (HR), and affect. The “angry” prime, compared to the “relax” prime, did not affect any of the outcome variables. During the priming task, a higher level of implicit negative affect (INA) was associated with a lower systolic BP and diastolic BP. No association was found with HR. Self-reported affect and implicit positive affect were not related to the cardiovascular (CV) activity. In sum, anger and relax primes elicited similar CV activity patterns, but implicit measures of affect may provide a new method to examine the relationship between (unconscious) stress and health.

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