Freshwater Biodiversity Toolbox
Invasive Species Removal – Chemical Methods to Remove Invasive Crayfish
Invasive species adversely impact their introduced environments by causing environmental, ecological, and economic damages. Due to the reproductive biology and competitive strength of many invasive species, they can be extremely difficult or impossible to eradicate once established. Early management interventions such as removal and eradication programs can help control or eliminate populations of invasive aquatic organisms. Chemical treatments (e.g., biocides, surfactants) in lakes or rivers have been reported to have high success rates but are often broad-scale and negatively impact native flora and fauna as well. Other novel techniques include the use of pheromones such as anti-predator cues to control invasive crayfish species. Application, eradication success, and biological impacts are discussed in these syntheses.
Rating:
All syntheses were scored poorly in CEESAT demonstrating limitations in the rigour and the transparency in which the syntheses were conducted (i.e., no a-priori protocol, critical appraisal, or appropriate search strategy provided)
RASCAT scoring was mixed for this intervention; Holdich et al. (1999) was highly relevant to a Canadian freshwater context in terms of the reviewed habitats, climates, and countries. It is also an older synthesis, and alongside Gherardi et al. (2011), did not provide any consideration of implications, practical advice, or recommendations for decision-makers.
Photo credit: D. Gordon E. Robertson
