The role of antipredator behavior in an experimental community of jumping spiders with intraguild predation

2002 ◽  
Vol 44 (2) ◽  
pp. 121-125 ◽  
Author(s):  
T. Okuyama
2015 ◽  
Vol 157 (3) ◽  
pp. 360-364 ◽  
Author(s):  
Ignacio Castellanos ◽  
Pedro Barbosa ◽  
Iriana Zuria ◽  
Astrid Caldas

Author(s):  
Kevin S. McCann

This chapter considers four-species modules and the role of generalism (effectively a three-species module with a consumer feeding on two resources). It first examines how generalists affect the dynamics of food webs by focusing on a set of modules that contrast generalist consumer dynamics relative to the specialist case. It then discusses organismal trade-offs that play a role in governing the diamond food web module and the intraguild predation module, arguing that such tradeoffs influence the flux of matter, the organization of interaction strengths, and ultimately the stability of communities. The chapter also reviews empirical evidence showing that apparent competition and the diamond module with and without intraguild predation are ubiquitous, and that weak interactions in simple modules seem to promote less variable population dynamics.


2010 ◽  
Vol 213 (14) ◽  
pp. 2372-2378 ◽  
Author(s):  
D. B. Zurek ◽  
A. J. Taylor ◽  
C. S. Evans ◽  
X. J. Nelson
Keyword(s):  

2015 ◽  
Vol 213 ◽  
pp. 59-64 ◽  
Author(s):  
Lorin A. Neuman-Lee ◽  
Amber N. Stokes ◽  
Sydney Greenfield ◽  
Gareth R. Hopkins ◽  
Edmund D. Brodie ◽  
...  

Behaviour ◽  
1999 ◽  
Vol 136 (1) ◽  
pp. 1-21 ◽  
Author(s):  
Reginald Cocroft

Parental care of post-hatching offspring is widespread in insects, but the role of communication in parent-offspring interactions remains largely unknown. I have found that, in the subsocial treehopper Umbonia crassicornis , aggregated nymphal offspring produce substrate-borne, vibrational signals in synchronized bursts that elicit the mother's antipredator behavior. In this study I describe the signals used by nymphs and explore their role in mother-offspring interactions and within-brood communication. Nymphs were stimulated to signal in the laboratory in response to light contact, simulating the approach of a predator. Signals of nymphs at the site of disturbance triggered a rapid wave of signaling by many individuals within the aggregation. This coordinated signaling was associated with the mother's defensive behavior. Signaling was limited to the vibrational channel: when transmission of vibrations was blocked between signaling nymphs and the mother, the mothers' response was abolished. Nymphs signaled not only in response to contact, but also in response to playback of signals from their siblings. Nymphs in otherwise undisturbed aggregations signaled only in response to signals coordinated into synchronized, group displays, and not to signals in random temporal patterns. However, nymphal signaling thresholds were lowered after a recent experience of simulated predation. After a period in which nymphs were stimulated to signal (by light contact simulating a predator's approach), playback of one individual signal could trigger a coordinated burst within the aggregation. It remains unknown if coordination among siblings to produce synchronized, group signals is completely cooperative, or if siblings compete for the mother's proximity. But it is clear that a complex system of communication among siblings, and between siblings and their parent, is an important feature of maternal care in these subsocial insects.


1998 ◽  
Vol 13 (2) ◽  
pp. 121-126 ◽  
Author(s):  
William F. Fagan ◽  
Arief Lukman Hakim ◽  
Hartjahyo Ariawan ◽  
Sri Yuliyantiningsih

2008 ◽  
Vol 77 (2) ◽  
pp. 91-98 ◽  
Author(s):  
Jaimie T.A. Dick

In attempting to understand the distributions of both introduced species and the native species on which they impact, there is a growing trend to integrate studies of behaviour with more traditional life history/ecological approaches. The question of what mechanisms drive the displacement of the freshwater amphipod Gammarus duebeni by the often introduced G. pulex is presented as a case study. Patterns of displacement are well documented throughout Europe, but the speed and direction of displacement between these species can be varied. From early studies proposing interspecific competition as causal in these patterns, I review research progress to date. I show there has been no evidence for interspecific competition operating, other than the field patterns themselves, a somewhat tautological argument. Rather, the increased recognition of behavioural attributes with respect to the cannibalistic and predatory nature of these species gave rise to a series of studies unravelling the processes driving field patterns. Both species engage in ‘intraguild predation’ (IGP), with moulting females particularly vulnerable to predation by congeneric males. G. pulex is more able both to engage in and avoid this interaction with G. duebeni. However, several factors mediate the strength and asymmetry of this IGP, some biotic (e.g. parasitism) and others abiotic (e.g. water chemistry). Further, a number of alternative hypotheses that may account for the displacement (hybridization; parasite transmission) have been tested and rejected. While interspecific competition has been modelled mathematically and found to be a weak interaction relative to IGP, mechanisms of competition between these Gammarus species remain largely untested empirically. Since IGP may be finely balanced in some circumstances, I conclude that the challenge to detect interspecific competition remains and we require assessment of its role, if any, in the interaction between these species. Appreciation of behavioural attributes and their mediation should allow us to more fully understand, and perhaps predict, species introductions and resultant distributions.


2021 ◽  
Vol 89 ◽  
pp. 105-135
Author(s):  
Jai Prakash Tripathi ◽  
Partha Sarathi Mandal ◽  
Ashish Poonia ◽  
Vijay Pal Bajiya

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