Differences in aggressive behaviour along the expanding range of an invasive crayfish: an important component of invasion dynamics

Hudina, Sandra, Zganec, Kresimir and Hock, Karlo (2015) Differences in aggressive behaviour along the expanding range of an invasive crayfish: an important component of invasion dynamics. Biological Invasions, 17 11: 3101-3112. doi:10.1007/s10530-015-0936-x


Author Hudina, Sandra
Zganec, Kresimir
Hock, Karlo
Title Differences in aggressive behaviour along the expanding range of an invasive crayfish: an important component of invasion dynamics
Journal name Biological Invasions   Check publisher's open access policy
ISSN 1387-3547
1573-1464
Publication date 2015-07-02
Sub-type Article (original research)
DOI 10.1007/s10530-015-0936-x
Open Access Status Not yet assessed
Volume 17
Issue 11
Start page 3101
End page 3112
Total pages 12
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2016
Language eng
Abstract Aggressive interactions are essential for resource distribution and population dynamics of many animal species. Aggression can also help invasive species to wrestle the resources from other species and invade new habitat. To examine the effects of intra-species aggression on range expansion, we compared aggression levels of signal crayfish (Pacifastacus leniusculus) at the core and front of the invasion range in recently invaded regions of Croatia. More pronounced aggression was observed in core populations with high population densities, indicating potentially greater importance of highly aggressive behaviour in populations with higher competitive pressure. Despite better overall physical condition, individuals at the invasion front generally displayed lower levels of aggression and regularly lost interactions to individuals from the invasion core. Rather than providing a competitive advantage during range expansion, aggression may be more expressed in established populations, priming the individuals for future expansions while also driving the dispersal outward. The observed difference in aggression along the invasion pathway demonstrates that traits that help individuals to overcome challenges of their environment, such as competition against conspecifics, can drive the invasion dynamics of a successful invader in a new environment in terms of both niche competition and intrinsic expansion dynamics.
Keyword Aggression
Dispersal
Freshwater invasion
Invasive species
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Early view of article. Published online 2 July, 2015.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
 
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