Foraging behaviour of the parasitoidEretmocerus eremicusunder intraguild predation risk byMacrolophus pygmaeus

2014 ◽  
Vol 71 (9) ◽  
pp. 1346-1353 ◽  
Author(s):  
María Concepción Velasco-Hernández ◽  
Ricardo Ramirez-Romero ◽  
Carla Sánchez-Hernández ◽  
Antonio Biondi ◽  
Alejandro Muñoz-Urias ◽  
...  
Keyword(s):  
Predation Risk ◽  
Intraguild Predation ◽  
Foraging Behaviour

Design of experimental food patches to measure foraging intensity for octopus: a case study with the giant Pacific octopus Enteroctopus dofleini

2020 ◽  
Author(s):  
Stephanie Chancellor ◽  
David Scheel ◽  
Joel S Brown
Keyword(s):  
Predation Risk ◽  
Foraging Behaviour ◽  
Habitat Preferences ◽  
High Tide ◽  
Intertidal Habitat ◽  
Camera System ◽  
Subtidal Habitat ◽  
Enteroctopus Dofleini ◽  
Nontarget Species

ABSTRACT In a study of the foraging behaviour of the giant Pacific octopus Enteroctopus dofleini, we designed two types of experimental food patches to measure habitat preferences and perceptions of predation risk. The first patch successfully measured giving-up densities (GUDs), confirmed by octopus prey presence and higher foraging at sites with historically greater octopus presence. However, nontarget foragers also foraged on these experimental food patches. Our second floating patch design successfully excluded nontarget species from subtidal patches, and from intertidal patches at high tide, but allowed for foraging by E. dofleini. The second design successfully measured GUDs and suggested that octopus preferred foraging in a subtidal habitat compared to an intertidal habitat. We ascribe the higher GUD in the intertidal habitat to its higher predation risk relative to the subtidal habitat. The second patch design seems well suited for E. dofleini and, in conjunction with a camera system, could be used to provide behavioural indicators of the octopus's abundance, perceptions of habitat quality and predation risk.

Modification of 0+ perch foraging behaviour by indirect cues of predation risk

2006 ◽  
Vol 15 (2) ◽  
pp. 118-124 ◽  
Author(s):  
J. Wanzenbock ◽  
V. N. Mikheev ◽  
A. F. Pasternak
Keyword(s):  
Predation Risk ◽  
Foraging Behaviour ◽  
Indirect Cues

Predation risk and distance to cover affect foraging behaviour in Namib Desert gerbils

1993 ◽  
Vol 46 (6) ◽  
pp. 1243-1245 ◽  
Author(s):  
Jessica J. Hughes ◽  
David Ward
Keyword(s):  
Predation Risk ◽  
Foraging Behaviour ◽  
Namib Desert

scholarly journals Predation risk and resource abundance mediate foraging behaviour and intraspecific resource partitioning among consumers in dominance hierarchies

Oikos ◽  
2019 ◽  
Vol 128 (7) ◽  
pp. 1005-1014
Author(s):  
Sean M. Naman ◽  
Rui Ueda ◽  
Takuya Sato
Keyword(s):  
Predation Risk ◽  
Resource Partitioning ◽  
Foraging Behaviour ◽  
Dominance Hierarchies ◽  
Resource Abundance

Impact of intraguild predation on parasitoid foraging behaviour

2010 ◽  
Vol 35 (2) ◽  
pp. 183-189 ◽  
Author(s):  
ANGELIKI F. MARTINOU ◽  
BENJAMIN RAYMOND ◽  
PANAGIOTIS G. MILONAS ◽  
DENIS J. WRIGHT
Keyword(s):  
Intraguild Predation ◽  
Foraging Behaviour ◽  
Parasitoid Foraging

scholarly journals Threat-sensitive anti-intraguild predation behaviour: maternal strategies to reduce offspring predation risk in mites

2011 ◽  
Vol 81 (1) ◽  
pp. 177-184 ◽  
Author(s):  
Andreas Walzer ◽  
Peter Schausberger
Keyword(s):  
Predation Risk ◽  
Intraguild Predation

Intraguild Predation and Cannibalism in Odonate Larvae: Effects of Foraging Behaviour and Zooplankton Availability

Oikos ◽  
1993 ◽  
Vol 66 (1) ◽  
pp. 80 ◽  
Author(s):  
Frank Johansson
Keyword(s):  
Intraguild Predation ◽  
Foraging Behaviour ◽  
Odonate Larvae

Differential effects of predation risk and competition over vigilance variables and feeding success in Eurasian siskins (Carduelis spinus)

Behaviour ◽  
2013 ◽  
Vol 150 (14) ◽  
pp. 1665-1687 ◽  
Author(s):  
Jordi Pascual ◽  
Juan Carlos Senar
Keyword(s):  
Food Intake ◽  
Predation Risk ◽  
Foraging Behaviour ◽  
Interference Competition ◽  
Ecological Factors ◽  
Intake Rate ◽  
Similar Length ◽  
Feeding Success ◽  
High Predation ◽  
Food Intake Rate

Many investigations have studied the effects of predation risk and competition over vigilance and feeding success, but they have proven to be difficult to discriminate. Moreover, none of the studies that have avoided the confusion has considered all the vigilance variables, food intake rate and time spent in the foraging patch. In this study, we designed an experiment with Eurasian siskinsCarduelis spinusforaging on three bird table feeders: one with low predation risk and competition, one with low predation risk and high competition and one with high predation risk and intermediate competition. Birds responded to increasing interference competition by increasing mean scan durations (probably due to the birds having to be vigilant for both other flock members and predators) and maintaining the length of mean inter-scan durations, while they responded to increasing predation risk by reducing mean inter-scan durations (probably in order to detect the predator sooner) while maintaining similar length of mean scan durations. Birds were often ejected from the feeder or departed because of disturbances, so time spent on feeders was reduced both because of competition and predation risk. Pecking rates were affected by competition but not by predation risk. Our results clearly show that birds vigilance strategy while foraging might be very different when they are mainly concerned with scanning for predators or when they primarily monitor competing flock companions. In addition, they stress the importance of recording all the vigilance and feeding variables when studying the effect of ecological factors over the foraging behaviour of birds.

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