Collected Evidence: Collected Evidence: Reduce legal speed limit One study evaluated the effects on mammals of reducing the legal speed limit. This study was in Canada. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Survival (1 study): A controlled, before-and-after study in Canada found that speed limit reductions and enforcement did not reduce vehicle collisions with bighorn sheep or elk. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2596https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2596Thu, 11 Jun 2020 15:03:23 +0100Collected Evidence: Collected Evidence: Remove roadkill regularly to reduce kill rate of predators/scavengers We found no studies that evaluated the effects of removing roadkill regularly to reduce the kill rate of predators/scavengers. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2601https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2601Thu, 11 Jun 2020 15:32:32 +0100Collected Evidence: Collected Evidence: Retain/maintain road verges as small mammal habitat We found no studies that evaluated the effects of retaining or maintaining road verges as small mammal habitat. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2604https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2604Thu, 11 Jun 2020 15:49:04 +0100Collected Evidence: Collected Evidence: Use road lighting to reduce vehicle collisions with mammals Two studies evaluated the effects on mammals of using road lighting to reduce vehicle collisions with mammals. Both studies were in the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (2 STUDIES) Survival (2 studies): One of two studies (one controlled and one before-and-after), in the USA, found that road lighting reduced vehicle collisions with moose. The other study found that road lighting did not reduce vehicle collisions with mule deer. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2614https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2614Fri, 12 Jun 2020 08:16:01 +0100Collected Evidence: Collected Evidence: Use chemical repellents along roads or railways Five studies evaluated the effects on mammals of using chemical repellents along roads or railways. Two studies were in Canada and one each was in Germany, Norway and Denmark. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (2 STUDIES) Survival (2 studies): Two studies (one before-and-after, one site comparison), in Germany and Norway, found that chemical-based repellents did not reduce collisions between ungulates and road vehicles or trains. BEHAVIOUR (4 STUDIES) Behaviour change (4 studies): Two of four studies (including three replicated, controlled studies), in Germany, Canada, and Denmark, found that chemical repellents, trialled for potential to deter animals from roads, did not deter ungulates. The other two studies found mixed results with repellents temporarily deterring some ungulate species in one study and one of three deterrents deterring caribou in the other. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2615https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2615Fri, 12 Jun 2020 08:24:14 +0100Collected Evidence: Collected Evidence: Use alternative de-icers on roads We found no studies that evaluated the effects on mammals of using alternative de-icers on roads. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2616https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2616Fri, 12 Jun 2020 09:06:31 +0100Collected Evidence: Collected Evidence: Use reflective collars or paint on mammals to reduce collisions with road vehicles We found no studies that evaluated the effects of using reflective collars or paint on mammals to reduce collisions with road vehicles. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2619https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2619Fri, 12 Jun 2020 09:31:06 +0100Collected Evidence: Collected Evidence: Use wildlife decoy to reduce vehicle collisions with mammals We found no studies that evaluated the effects of using wildlife decoys to reduce vehicle collisions with mammals. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2620https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2620Fri, 12 Jun 2020 09:32:37 +0100
What Works 2021 cover

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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