Collected Evidence: Collected Evidence: Procambarus crayfish control: Trapping and removal One controlled, replicated study in Italy found that baiting traps with food (tinned meat) trapped the most red swamp crayfish compared to the use of male and female pheromones or the control (no bait). Over half of all crayfish caught were found in traps baited with food.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1029https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1029Fri, 03 Jul 2015 15:14:42 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Encouraging predators Two replicated, controlled studies in Italy found that eels fed on the red swamp crayfish and reduced population size. One replicated, controlled study from France in 2001 found that pike predated red swamp crayfish.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1030https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1030Fri, 03 Jul 2015 15:15:43 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Trapping combined with encouragement of predators A before-and-after study in Switzerland found that introducing predators, combined with trapping significantly reduced red swamp crayfish populations in a pond. A second replicated, controlled study from Italy demonstrated that trapping and predation in combination was more effective at reducing red swamp crayfish populations than predation alone.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1031https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1031Fri, 03 Jul 2015 15:16:05 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Sterilization of males One replicated laboratory study in Italy found that exposing male red swamp crayfish to X-rays reduced the number of offspring they produced by 43%.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1032https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1032Fri, 03 Jul 2015 15:16:20 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Removal of food source No evidence was captured on the effect of removing food sources as a control tool for Procambarus crayfish. 'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1033https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1033Fri, 03 Jul 2015 15:16:38 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Draining the waterway No evidence was captured on the effect of draining the waterway as a control tool for Procambarus crayfish. 'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1034https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1034Fri, 03 Jul 2015 15:16:57 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Remove the crayfish by electrofishing No evidence was captured on the effect of electrofishing as a control tool for Procambarus crayfish. 'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.    Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1035https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1035Fri, 03 Jul 2015 15:17:11 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Add chemicals to the water One replicated, controlled study in Italy found that red swamp crayfish could be killed using the natural pyrethrum Pyblast at a concentration of 0.05 mg/l, but that application to drained crayfish burrows was not effective.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1036https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1036Fri, 03 Jul 2015 15:17:25 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Create barriers A before-and-after study conducted between 2007 and 2010 in Spain found that the use of concrete dams across a stream, specifically designed with features to prevent red swamp crayfish from crawling over them, were effective at containing spread of the population upstream.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1037https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1037Fri, 03 Jul 2015 15:18:00 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Relocate vulnerable crayfish No evidence was captured for the effect of relocating native species as a management tool against the effects of Procambarus crayfish. 'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1038https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F1038Fri, 03 Jul 2015 15:18:14 +0100
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What Works in Conservation

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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