Ponto-Caspian gammarids: Exposure to parasites

How is the evidence assessed?
  • Effectiveness
    50%
  • Certainty
    50%
  • Harms
    not assessed

Study locations

Key messages

  • A replicated, laboratory study in Canada found that an introduced parasitic mould reduced populations of an invasive shrimp.

 

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A replicated, controlled laboratory study in 2011 in Canada (Kestrup et al. 2011) found that a parasitic water mould (oomycete) of unknown origin infected and killed invasive gammarids Echinogammarus ischnus. Invasive shrimps exposed to water carrying the mould had a 52% mortality rate after seven days, compared with 16% mortality in native shrimps. Laboratory tests used 20 replicate aquaria each containing 10 invasive and 10 native (Gammarus faciatus) shrimps. Two litres of river water was placed in each aquarium from the St. Lawrence River, which was the location of the mould’s original discovery.  Aquaria were checked twice daily for seven days and dead individuals were removed.

    Study and other actions tested
Please cite as:

Aldridge, D., Ockendon, N., Rocha, R., Smith, R.K. & Sutherland, W.J. (2020) Some Aspects of Control of Freshwater Invasive Species. Pages 555-87 in: W.J. Sutherland, L.V. Dicks, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2020. Open Book Publishers, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Control of Freshwater Invasive Species

This Action forms part of the Action Synopsis:

Control of Freshwater Invasive Species
Control of Freshwater Invasive Species

Control of Freshwater Invasive Species - Published 2017

Control of Freshwater Invasive Species Synopsis

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What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

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