| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
5821
|
Cherax destructor
|
Competition
|
Observational
|
Field
|
Stable isotope analysis revealed significant resource overlap between Cherax destructor and C. cainii, suggesting competition for resources.
|
Hutt River, Australia
|
29500
|
|
5822
|
Cherax destructor
|
Competition
|
Anecdotal
|
N/A
|
The yabby’s (Cherax destructor) adaptive diet suggests it may compete with smaller native freshwater crayfish for resources, especially in small, unproductive lotic and lentic ecosystems.
|
|
29500
|
|
5825
|
Cherax destructor
|
Competition
|
Experimental
|
Laboratory
|
In a lab experiment, the yabby (Cherax destructor) consistently won competitive interactions with the giant spiny crayfish (Euastacus spinifer), regardless of habitat complexity or residency status.
|
|
40012
|
|
5827
|
Cherax destructor
|
Competition
|
Observational
|
Field
|
An observational field study using an underwater video camera documented competitive interactions between the yabby (Cherax destructor) and the endangered Fitzroy Falls spiny crayfish (Euastacus dharawalus). The yabby displayed increased aggression compared to the spiny crayfish. Findings suggest the yabby poses a significant threat to this species through behavioral interactions.
|
Australia
|
40021
|
|
6099
|
Cherax destructor
|
Competition
|
Experimental
|
Laboratory
|
Contest experiments conducted between the yabby (Cherax destructor) and the giant spiny crayfish (Euastacus spinifer) suggest the yabby has a competitive advantage at elevated water temperatures. The giant spiny crayfish had high mortality rates post-contest, particularly at higher water temperatures.
|
Australia
|
41107
|
|
6100
|
Cherax destructor
|
Competition
|
Experimental
|
Laboratory
|
Contest experiments between the yabby (Cherax destructor), signal crayfish (Pacifastacus leniusculus), and marbled crayfish (Procambarus virginalis) suggest the signal crayfish is the most aggressive and competitively dominant of the three species. The yabby was more aggressive and won more contests than the marbled crayfish, indicating a high probability of competitive dominance in areas where they co-occur.
|
|
41109
|
|
6101
|
Cherax destructor
|
Competition
|
Experimental
|
Laboratory
|
Competition experiments conducted between the yabby (Cherax destructor) and the Australian redclaw crayfish (Cherax quadricarinatus) indicate the redclaw crayfish had higher dominance and behavioral intensity scores. However, the yabby spent more time in possession of the food resource and results suggest the redclaw crayfish may outcompete the yabby for territory but not food resources.
|
|
41113
|
|
6102
|
Cherax destructor
|
Competition
|
Experimental
|
Laboratory
|
Contest experiments between the yabby (Cherax destructor) and the Fitzroy Falls spiny crayfish (Euastacus dharawalus) found that the spiny crayfish was frequently more aggressive and less submissive than the yabby. However, the yabby spent significantly more time consuming food and may negatively impact the fitness of the Fitzroy Falls spiny crayfish through reduced access to resources.
|
|
41115
|
|
6109
|
Cherax destructor
|
Competition
|
Anecdotal
|
N/A
|
Environmental niche and species distribution modeling suggest a high degree of niche overlap and high risk of co-occurence between the yabby (Cherax destructor) and freshwater crab species in Southeast Asia.
|
Southeast Asia
|
41131
|