scholarly journals Temporal Variation in Predation Risk May Explain Daily Rhythms of Foraging Behavior in an Orb-Weaving Spider

2018 ◽  
Vol 191 (1) ◽  
pp. 74-87 ◽  
Author(s):  
J. Colton Watts ◽  
Thomas C. Jones ◽  
Ashley Herrig ◽  
Madeleine Miller ◽  
Brigitte Tenhumberg
Keyword(s):  
Temporal Variation ◽  
Predation Risk ◽  
Foraging Behavior ◽  
Daily Rhythms

Perceived predation risk, parasitism, and the foraging behavior of a freshwater snail (Potamopyrgus antipodarum)

1998 ◽  
Vol 76 (10) ◽  
pp. 1878-1884 ◽  
Author(s):  
Edward P Levri
Keyword(s):  
Predation Risk ◽  
Foraging Behavior ◽  
Freshwater Snail ◽  
Potamopyrgus Antipodarum ◽  
Plain Water ◽  
Fish Diet ◽  
Fish Predator ◽  
Size Dependent ◽  
Individual Size ◽  
Perceived Predation Risk

Foraging behavior can be influenced by such factors as predation risk, individual size, and parasite infection. Snails (Potamopyrgus antipodarum) placed in tanks with large rocks were exposed to four types of water: (1) water with crushed snails, (2) water from a tank in which fish (Gobiomorphus cotidianus) were fed only trout chow, (3) water from a tank where the fish were also fed snails, and (4) plain water. Snails could respond by moving to the top of rocks (where algal food was present) or to the bottom of rocks (where the predation risk was lower). The snails responded to fish chemicals by moving to the bottom of rocks. The response was dependent on snail size and fish diet. Smaller snails moved to the bottom of rocks more than larger snails did. Trematode-infected snails were found on top of the rocks more than other classes of snails, but infected snails still moved to the bottom of rocks in response to the fish predator. Snails eaten by fish in the field tend to be smaller than snails in the overall available population. Thus, snails that are more vulnerable to predation respond more intensely to the odor of fish by moving to the bottom of rocks. This size-dependent response to fish appears to be independent of the occurrence of trematode infection.

Assessing Effects of Predation Risk on Foraging behavior of Mule Deer

2001 ◽  
Vol 82 (2) ◽  
pp. 430-439 ◽  
Author(s):  
K. B. Altendorf ◽  
J. W. Laundre ◽  
C. A. L. GonzaLez ◽  
J. S. Brown
Keyword(s):  
Predation Risk ◽  
Foraging Behavior ◽  
Mule Deer

Daily Rhythms of Female Self-maintenance Correlate with Predation Risk and Male Nest Attendance in a Biparental Wader

2020 ◽  
Vol 35 (5) ◽  
pp. 489-500 ◽  
Author(s):  
Kateřina Brynychová ◽  
Miroslav E. Šálek ◽  
Eva Vozabulová ◽  
Martin Sládeček
Keyword(s):  
Parental Care ◽  
Predation Risk ◽  
Video Recording ◽  
Nest Attendance ◽  
Daily Rhythms ◽  
Female Self ◽  
Fitness Consequences ◽  
Vanellus Vanellus ◽  
Lack Of Sleep ◽  
Over Time

Parents make tradeoffs between care for offspring and themselves. Such a tradeoff should be reduced in biparental species, when both parents provide parental care. However, in some biparental species, the contribution of one sex varies greatly over time or between pairs. How this variation in parental care influences self-maintenance rhythms is often unclear. In this study, we used continuous video recording to investigate the daily rhythms of sleep and feather preening in incubating females of the Northern Lapwing ( Vanellus vanellus), a wader with a highly variable male contribution to incubation. We found that the female’s sleep frequency peaked after sunrise and before sunset but was low in the middle of the day and especially during the night. In contrast, preening frequency followed a 24-h rhythm and peaked in the middle of the day. Taken together, incubating females rarely slept or preened during the night, when the predation pressure was highest. Moreover, the sleeping and preening rhythms were modulated by the male contribution to incubation. Females that were paired with more contributing males showed a stronger sleep rhythm but also a weaker preening rhythm. If more incubating males also invest more in nest guarding and deterring daylight predators, their females may afford more sleep on the nest during the day and preen more when they are off the nest. Whether the lack of sleep in females paired with less caregiving males has fitness consequences awaits future investigation.

scholarly journals The responses of prey fish to temporal variation in predation risk: sensory habituation or risk assessment?

2010 ◽  
Vol 21 (3) ◽  
pp. 532-536 ◽  
Author(s):  
M. C. O. Ferrari ◽  
C. K. Elvidge ◽  
C. D. Jackson ◽  
D. P. Chivers ◽  
G. E. Brown
Keyword(s):  
Risk Assessment ◽  
Temporal Variation ◽  
Predation Risk ◽  
Prey Fish

Predation Risk and The Foraging Behavior of Competing Stream Insects

Ecology ◽  
1989 ◽  
Vol 70 (6) ◽  
pp. 1811-1825 ◽  
Author(s):  
Steven L. Kohler ◽  
Mark A. McPeek
Keyword(s):  
Predation Risk ◽  
Foraging Behavior ◽  
Stream Insects

Temporal variation in habitat selection breaks the catch-22 of spatially contrasting predation risk from multiple predators

Oikos ◽  
2016 ◽  
Vol 126 (5) ◽  
pp. 624-632 ◽  
Author(s):  
Karen Lone ◽  
Atle Mysterud ◽  
Terje Gobakken ◽  
John Odden ◽  
John Linnell ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Temporal Variation ◽  
Predation Risk ◽  
Multiple Predators ◽  
Catch 22
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