NDLI: Eastern mosquitofish resists invasion by nonindigenous poeciliids through agonistic behaviors

Content Provider	Springer Nature Link
Author	Thompson, Kevin A. Hill, Jeffrey E. Nico, Leo G.
Copyright Year	2012
Abstract	Florida is a hotspot for nonindigenous fishes with over 30 species established, although few of these are small-bodied species. One hypothesis for this pattern is that biotic resistance of native species is reducing the success of small-bodied, introduced fishes. The eastern mosquitofish Gambusia holbrooki is common in many freshwater habitats in Florida and although small-bodied (<50 mm), it is a predator and aggressive competitor. We conducted four mesocosm experiments to examine the potential for biotic resistance by eastern mosquitofish to two small-bodied nonindigenous fishes, variable platyfish (Xiphophorus variatus) and swordtail (X. hellerii). Experiments tested: (1) effect of eastern mosquitofish density on adult survival, (2) effect of eastern mosquitofish on a stage-structured population, (3) role of habitat structural complexity on nonindigenous adult survival, and (4) behavioral effects of eastern mosquitofish presence and habitat complexity. Eastern mosquitofish attacked and killed non-native poeciliids with especially strong effects on juveniles of both species. Higher eastern mosquitofish density resulted in greater effects. Predation on swordtails increased with increasing habitat complexity. Eastern mosquitofish also actively drove swordtails from cover, which could expose non-native fish to other predators under field conditions. Our results suggest that eastern mosquitofish may limit invasion success.
Starting Page	1515
Ending Page	1529
Page Count	15
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	14
Issue Number	7
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-02-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biotic resistance Gambusia holbrooki Xiphophorus Predation Aggressive competition Mesocosm Nonindigenous species Ecology Freshwater & Marine Ecology Plant Sciences Developmental Biology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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