scholarly journals Nursery pollination by a moth in Silene latifolia: the role of odours in eliciting antennal and behavioural responses

2006 ◽  
Vol 169 (4) ◽  
pp. 707-718 ◽  
Author(s):  
S. Dotterl ◽  
A. Jurgens ◽  
K. Seifert ◽  
T. Laube ◽  
B. Weissbecker ◽  
...  
Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 293
Author(s):  
Selene S. C. Nogueira ◽  
Sérgio L. G. Nogueira-Filho ◽  
José M. B. Duarte ◽  
Michael Mendl

Within a species, some individuals are better able to cope with threatening environments than others. Paca (Cuniculus paca) appear resilient to over-hunting by humans, which may be related to the behavioural plasticity shown by this species. To investigate this, we submitted captive pacas to temperament tests designed to assess individual responses to short challenges and judgement bias tests (JBT) to evaluate individuals’ affective states. Results indicated across-time and context stability in closely correlated “agitated”, “fearful” and “tense” responses; this temperament dimension was labelled “restless”. Individual “restless” scores predicted responses to novelty, although not to simulated chasing and capture by humans in a separate modified defence test battery (MDTB). Restless animals were more likely to show a greater proportion of positive responses to an ambiguous cue during JBT after the MDTB. Plasticity in defensive behaviour was inferred from changes in behavioural responses and apparently rapid adaptation to challenge in the different phases of the MDTB. The results indicate that both temperament and behavioural plasticity may play a role in influencing paca responses to risky situations. Therefore, our study highlights the importance of understanding the role of individual temperament traits and behavioural plasticity in order to better interpret the animals’ conservation status and vulnerabilities.


Author(s):  
George F. Koob ◽  
Stephen C. Heinrichs ◽  
Emilio Merlo Pich ◽  
Frédérique Menzaghi ◽  
Helen Baldwin ◽  
...  

Parasitology ◽  
2019 ◽  
Vol 147 (8) ◽  
pp. 841-854 ◽  
Author(s):  
Navonil Banerjee ◽  
Elissa A. Hallem

AbstractCarbon dioxide (CO2) is an important sensory cue for many animals, including both parasitic and free-living nematodes. Many nematodes show context-dependent, experience-dependent and/or life-stage-dependent behavioural responses to CO2, suggesting that CO2 plays crucial roles throughout the nematode life cycle in multiple ethological contexts. Nematodes also show a wide range of physiological responses to CO2. Here, we review the diverse responses of parasitic and free-living nematodes to CO2. We also discuss the molecular, cellular and neural circuit mechanisms that mediate CO2 detection in nematodes, and that drive context-dependent and experience-dependent responses of nematodes to CO2.


2020 ◽  
Vol 10 (21) ◽  
pp. 11869-11874
Author(s):  
Nicolas M. Gutiérrez ◽  
Luciano Stucchi ◽  
Javier Galeano ◽  
Luis Giménez‐Benavides

2011 ◽  
Vol 5 ◽  
pp. JEN.S6280 ◽  
Author(s):  
Awoyemi A. Awofala ◽  
Susan Jones ◽  
Jane A. Davies

Stress plays an important role in drug- and addiction-related behaviours. However, the mechanisms underlying these behavioural responses are still poorly understood. In the light of recent reports that show consistent regulation of many genes encoding stress proteins including heat shock proteins following ethanol exposure in Drosophila, it was hypothesised that transition to alcohol dependence may involve the dysregulation of the circuits that mediate behavioural responses to stressors. Thus, behavioural genetic methodologies were used to investigate the role of the Drosophila hsp26 gene, a small heat shock protein coding gene which is induced in response to various stresses, in the development of rapid tolerance to ethanol sedation. Rapid tolerance was quantified as the percentage difference in the mean sedation times between the second and first ethanol exposure. Two independently isolated P-element mutations near the hsp26 gene eliminated the capacity for tolerance. In addition, RNAi-mediated functional knockdown of hsp26 expression in the glial cells and the whole nervous system also caused a defect in tolerance development. The rapid tolerance phenotype of the hsp26 mutants was rescued by the expression of the wild-type hsp26 gene in the nervous system. None of these manipulations of the hsp26 gene caused changes in the rate of ethanol absorption. Hsp26 genes are evolutionary conserved, thus the role of hsp26 in ethanol tolerance may present a new direction for research into alcohol dependency.


2003 ◽  
Vol 81 (3) ◽  
pp. 556-558 ◽  
Author(s):  
James E Dalby Jr ◽  
Joel K Elliott

In their study of behavioural responses of pennatulaceans to physical contact with asteroids in 2002, Weightman and Arsenault claim to be the first to demonstrate that cnidarians have the ability to distinguish predators from nonpredators. In fact, it has been known since at least the 1960s that cnidarians are capable of predator recognition. We briefly describe some of the abundant literature on this topic, especially studies on anthozoans.


2004 ◽  
Vol 132 (3) ◽  
pp. 427-433 ◽  
Author(s):  
A. Dobranskyte ◽  
R. Jugdaohsingh ◽  
E. Stuchlik ◽  
J.J. Powell ◽  
K.N. White ◽  
...  

Author(s):  
Liesbet Goubert ◽  
Laura E. Simons

Chronic pain is prevalent in children and adolescents. The current chapter outlines an interpersonal perspective on child pain, demonstrating the central role of child and parent pain-related cognitions in the development and maintenance of chronic pain in childhood. Pain takes place within a social context: children’s expressions of pain (e.g. facial pain displays) are observed and decoded by others (parents), eliciting emotional and behavioural responses. Parents’ responses may impact child outcomes in two ways, directly by imposing activity limitations/encouraging activity engagement or indirectly through observational learning. Although personality and temperamental factors may predispose children and parents to perceive pain as more or less threatening to deal with, the model presented in this chapter focuses on proximal pain-related cognitive processes and associated behaviours that contribute to pain-related disability in children. Recent evidence suggests that perceptions of pain as highly threatening (i.e. catastrophizing) may lead to fearful reactions to pain, activity avoidant behaviours, and more disability. In parents, catastrophizing thoughts about child pain are associated with higher levels of child disability, with recent evidence implicating parent protective behaviours as a mediating mechanism.


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