Invasive Species Ireland

Fishhook waterflea

Cercopagis pengoi

Status:

Potential

Habitat:

Freshwater

Threats:

Competiton with native invertebrates. Negative impacts on native fish.

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Floating primrose - willow

Ludwigia peploides

Status:

Potential

Habitat:

Freshwater

Threats:

Shades out native plants and changes water chemistry

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Gyrodactylus salaris

Status:

Potential

Habitat:

Freshwater

Threats:

Serious negative impacts on salmonid stocks.

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Killer shrimp

Dikerogammarus villosus

Status:

Potential

Habitat:

Freshwater

Threats:

Efficient predator. Adapatable to new freshwater systems. Highly mobile.

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Marbled crayfish

Procambarus fallax f. virginalis

Status:

Potential

Habitat:

Freshwater

Threats:

Potential threat of native crayfish. Potential threat to wetlands by extensive burrowing activities.

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North American signal crayfish

Pacifastacus leniusculus

Status:

Potential

Habitat:

Freshwater

Threats:

Detrimental impacts on white clawed crayfish. Human health impacts.

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Pacific or Pink humpback salmon

Oncorhynchus gorbuscha

Status:

Potential

Habitat:

Freshwater

Threats:

Has a high reproductive rate. May predate on native plankton, crustaceans and smaller fish.

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Pumpkinseed

Lepomis gibbosus

Status:

Potential

Habitat:

Freshwater

Threats:

Highly adaptable to different environments. Fast growing ang high reproductive capacity. Has a broad diet.

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Red swamp crayfish

Procambarus clarkii

Status:

Potential

Habitat:

Freshwater

Threats:

Outcompetes the native European crayfish. Degrades riverbanks through burrowing

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