scholarly journals Behavioural response of invasive Mytilus galloprovincialis and indigenous Perna perna mussels exposed to risk of predation

2007 ◽  
Vol 336 ◽  
pp. 169-175 ◽  
Author(s):  
KR Nicastro ◽  
GI Zardi ◽  
CD McQuaid
Keyword(s):  
Mytilus Galloprovincialis ◽  
Behavioural Response ◽  
Perna Perna ◽  
Risk Of Predation

Use of Acetylcholinesterase in Perna perna and Mytilus galloprovincialis as a Biomarker of Pollution in Agadir Marine Bay (South of Morocco)

1997 ◽  
Vol 58 (6) ◽  
pp. 901-908 ◽  
Author(s):  
S. Najimi ◽  
A. Bouhaimi ◽  
M. Daubèze ◽  
A. Zekhnini ◽  
J. Pellerin ◽  
...  
Keyword(s):  
Mytilus Galloprovincialis ◽  
Perna Perna

scholarly journals Behavioural reactions of three-spined sticklebacks to simulated risk of predation—Effects of predator distance and movement

FACETS ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 55-66 ◽  
Author(s):  
Joacim Näslund ◽  
Leo Pettersson ◽  
Jörgen I Johnsson
Keyword(s):  
Gasterosteus Aculeatus ◽  
Behavioural Response ◽  
Control Treatment ◽  
Predator Control ◽  
Experimental Setting ◽  
Potential Predator ◽  
Risk Of Predation ◽  
Predation Effects ◽  
Predator Model ◽  
Time Freezing

The behavioural response of animals to predation risk commonly depends on the behaviour of potential predators. Here, we report an experiment investigating effects of predator model (a life-like wooden trout model) distance and movement on the behaviour of three-spined sticklebacks Gasterosteus aculeatus L. in a standardized experimental setting. When the predator model was immobile, the behaviour of the sticklebacks could, in general, not be clearly distinguished from a no-predator control treatment. When moving the predator 41 cm towards the stickleback, clear anti-predator behaviours were observed. However, behavioural expression depended on the distance to the predator. At the two farthest distances (approaching from 129 to 88 cm and from 170 to 129 cm), the sticklebacks approached the predator and spent little time freezing. At the two closest distances (approaching from 88 to 47 cm and from 47 to 6 cm), the sticklebacks increased the distance to the predator model and froze their movements. These results suggest that the closest-distance groups showed avoidance behaviour, whereas the farthest-distance groups instead appeared to start inspecting the potential predator. This provides evidence for conditional anti-predator behaviour and highlights the importance of considering distance to, and movement of predator models when interpreting data from standardized behavioural trials.

scholarly journals Effect of Alarm Chemicals and Predator Kairomones on the Behaviour of Two Species of Mosquito Larvae

2019 ◽  
Vol 24 (1) ◽  
pp. 18
Author(s):  
Derek Roberts ◽  
Nargis Al-Alawi ◽  
Mai Al-Gharibi
Keyword(s):  
High Risk ◽  
Mosquito Species ◽  
Chemical Signals ◽  
Behavioural Response ◽  
Mosquito Larvae ◽  
Predator Detection ◽  
Risk Of Predation ◽  
Culiseta Longiareolata ◽  
Filter Feeders ◽  
High Level

Mosquito larvae have developed a variety of responses to reduce the risk of predation, but this requires them to be able to identify the different species of predators and respond accordingly. We investigated the behavioural response of two mosquito species to three chemical signals: kairomones from two predators, and also to alarm semiochemicals from killed mosquito larvae. Culex perexiguus mosquito larvae are primarily surface filter-feeders. In response to all three chemical signals, they significantly reduced feeding by the high-risk active bottom scraping of biofilms in favour of the less active (and so lower predator-detection risk) surface filter feeding.  Active escape swimming (instead of feeding) also increased for all three signals, but was much less for dragonfly nymph kairomones. Dragonflies are almost entirely bottom feeders and so are a much lower danger to surface feeding mosquitoes compared with damselfly nymphs, which feed at all depths. Culiseta longiareolata mosquito larvae normally have a high level of bottom-feeding. This was significantly reduced to all three chemical signals, but escape swimming only occurred for dragonfly kairomones (which are natural predators for the bottom-feeding larvae).

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