Freshwater pest species

This is a series of fact sheets on alien fish, invertebrate, algal and weed species that are recorded in New Zealand freshwaters.

The fact sheets outline species distributions in New Zealand, preferred habitat, dispersal mechanisms, identification features, similar species and how to distinguish these, current biosecurity status and biosecurity risks.

The establishment of alien pest species in New Zealand's freshwater systems continues to threaten the values and utility of our natural resources. Early identification of new pest incursions and appropriate action can help prevent further spread or mitigate their impacts. Water body managers and agency field staff also require resources on pests to aid in inventory, surveillance and monitoring.

These fact sheets provide an updated resource to replace the 2004 booklet Identification Guide: Freshwater Pests of New Zealand. They address nine fish species, eleven invertebrate species, two algal species and thirty-nine weed species.

A Publishing and Reporting System enables on-going content management for the provision of up-to-date information. Funding was provided by the Terrestrial and Freshwater Biodiversity Information System (TFBIS) Programme, administered by the Department of Conservation. 

The factsheets are available for download below, and are available in both landscape and portrait format.

Freshwater Pests of New Zealand 2013 - landscape format (PDF 6.8 MB)

Freshwater Pests of New Zealand 2013 - portrait format (PDF 6.6 MB)

Freshwater Pests of New Zealand.
Planorbarius corneus. Lateral view, with insert of shell opening. [B. Smith]