scholarly journals Temporal Foraging Patterns of Nonnative Coqui Frogs (Eleutherodactylus coqui) in Hawaii

2016 ◽  
Vol 50 (4) ◽  
pp. 582-588 ◽  
Author(s):  
Arthur C. Wallis ◽  
Robyn L. Smith ◽  
Karen H. Beard
Keyword(s):  
Eleutherodactylus Coqui ◽  
Foraging Patterns

scholarly journals Foraging behavior and at-sea distribution of White-Tailed Tropicbirds in tropical ocean

2017 ◽  
Vol 78 (3) ◽  
pp. 556-563 ◽  
Author(s):  
L. F. A. S. Campos ◽  
A. B. Andrade ◽  
S. Bertrand ◽  
M. A. Efe
Keyword(s):  
Endangered Species ◽  
Foraging Behavior ◽  
Mortality Rates ◽  
Nest Attendance ◽  
Breeding Colony ◽  
Tropical Ocean ◽  
Foraging Patterns ◽  
Land Crab ◽  
Egg Consumption ◽  
Foraging Pattern

Abstract We used miniaturized GPS loggers and site observations to access foraging patterns and nest behaviour of the White-tailed Tropicbird Phaethon lepturus (WTTB), an endangered species at its South Atlantic breeding colony. Dual foraging pattern was observed with alternation between long and short foraging trips. Birds responsible for nest attendance engaged in short foraging trips with mean distance from colony of 25 ± 17 km, total distance covered of 79 ± 65 km and mean duration of 4.02 ± 5.28 hours. Birds flew by dawn and returned before dusk while partners were at sea for long foraging trips that ranged from four to 11 days, with mean maximum distance from colony of 105 ± 47.48 km. Chicks were usually left alone for hours and chick predation by Land Crab Johngartia lagostroma, egg consumption by Goniopsis cruentata and intra-specific competition are suspected to be responsible for high chick mortality rates.

Vigilance and foraging patterns of American elk during the rut in habitats with and without predators

2003 ◽  
Vol 81 (2) ◽  
pp. 266-271 ◽  
Author(s):  
Jerry O Wolff ◽  
Toni Van Horn
Keyword(s):  
Cervus Elaphus ◽  
National Park ◽  
Forest Cover ◽  
Hot Springs ◽  
Rocky Mountain ◽  
Predation Pressure ◽  
Risk Avoidance ◽  
Foraging Patterns ◽  
Survival And Reproduction ◽  
Free Environment

Animal behavior is often optimized as a trade-off between survival and reproduction. During the breeding season, mammals tend to maximize their reproductive effort within the constraints of predation pressure. When predation pressure is reduced, greater effort can be allocated to reproductive behavior and less to vigilance and predator avoidance. The objective of this study was to test the hypothesis that elk, Cervus elaphus, in Yellowstone National Park (YNP), with predators, would spend more time in vigilance and risk-avoidance behavior than would elk in Rocky Mountain National Park (RMNP), a predator-free environment. We further predicted that elk at Mammoth Hot Springs (MAM) in YNP would behave similarly to those at RMNP because predators were absent in that area of the park. Cow elk in YNP spent more time in vigilance and less in foraging during activity periods than did cows in RMNP or MAM. Also, elk in YNP retreated to forest cover during the midday inactive period, whereas elk in RMNP and MAM remained in open habitat. Vigilance was not correlated with group size at either site. Cows with calves spent more time in vigilance and less in foraging than did cows without calves in RMNP and YNP. Bull elk spent most of their time in courtship at all sites, but foraged more at RMNP than in YNP or MAM. Mean harem sizes were similar among the three sites: 17.0 in RMNP, 15.7 in YNP, and 19.0 in MAM. The proportion of cows with calves was significantly lower in the area with predators, YNP (0.10), than in the predator-free areas (0.24 in RMNP and 0.37 in MAM), probably because of greater calf mortality in YNP. Elk in YNP behaved in accordance with a predation risk, whereas those in RMNP and MAM showed less vigilance behavior.

Fruits foraging patterns and seed dispersal effect of frugivorous birds on Hippophae rhamnoides sinensis

2006 ◽  
Vol 1 (3) ◽  
pp. 318-322 ◽  
Author(s):  
Xianwen Lu ◽  
Kun Sun ◽  
Ruijun Ma ◽  
Hui Zhang ◽  
Xue Su ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Hippophae Rhamnoides ◽  
Frugivorous Birds ◽  
Foraging Patterns ◽  
Hippophaë Rhamnoides

Tiny insects against the weather-flight and foraging patterns of Frankliniella schultzei (Thripidae) not altered by onset of rainfall

2017 ◽  
Vol 25 (6) ◽  
pp. 1119-1127 ◽  
Author(s):  
Lachlan C. Jones ◽  
Brodie J. Foster ◽  
Michelle A. Rafter ◽  
Gimme H. Walter
Keyword(s):  
Foraging Patterns ◽  
Frankliniella Schultzei

scholarly journals Evidence of Levy walk foraging patterns in human hunter-gatherers

2013 ◽  
Vol 111 (2) ◽  
pp. 728-733 ◽  
Author(s):  
D. A. Raichlen ◽  
B. M. Wood ◽  
A. D. Gordon ◽  
A. Z. P. Mabulla ◽  
F. W. Marlowe ◽  
...  
Keyword(s):  
Hunter Gatherers ◽  
Foraging Patterns ◽  
Lévy Walk ◽  
Levy Walk

Foraging Patterns of Breeding Egrets at Coastal and Interior Locations

Waterbirds ◽  
2002 ◽  
Vol 25 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Alan D. Maccarone ◽  
John N. Brzorad
Keyword(s):  
Foraging Patterns
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