Collected Evidence: Collected Evidence: Limit vessel numbers We found no studies that evaluated the effects of limiting vessel numbers on reptile populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2Fwww.conservationevidence.com%2Factions%2F3529https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3529Tue, 07 Dec 2021 15:37:06 +0000Collected Evidence: Collected Evidence: Limit vessel speeds Three studies evaluated the effects of limiting vessel speeds on reptiles. One study was in each of Australia, Costa Rica and the USA. COMMUNITY RESPONSE (0 STUDIES)   POPULATION RESPONSE (2 STUDIES) Survival (2 studies): One replicated, site comparison study in Costa Rica found that in waterways with enforced speed limits, fewer spectacled caiman were found dead with boat-related injuries compared to waterways with no speed limits. One replicated study in the USA found that vessels travelling at lower speeds caused fewer catastrophic injuries to artificial loggerhead turtle shells, though vessels with jet motors caused no catastrophic injuries at any speed tested. Condition (1 study): One replicated, site comparison study in Costa Rica found that in waterways with enforced speed limits, fewer spectacled caiman were found with boat-related injuries compared to waterways with no speed limits. BEHAVIOUR (1 STUDY) Behaviour change (1 study): One replicated study in Australia found that green turtles were more likely to flee from vessels travelling at lower speeds. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3531https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3531Tue, 07 Dec 2021 15:40:57 +0000Collected Evidence: Collected Evidence: Establish protocols to reduce collisions We found no studies that evaluated the effects of establishing protocols to reduce collisions on reptile populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2Fwww.conservationevidence.com%2Factions%2F3533https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3533Tue, 07 Dec 2021 15:56:10 +0000Collected Evidence: Collected Evidence: Train vessel operators on appropriate avoidance techniques to reduce collisions We found no studies that evaluated the effects on reptile populations of training vessel operators on appropriate avoidance techniques to reduce collisions. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2Fwww.conservationevidence.com%2Factions%2F3534https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3534Tue, 07 Dec 2021 15:58:45 +0000Collected Evidence: Collected Evidence: Use technology and reporting systems to avoid collisions We found no studies that evaluated the effects on reptile populations of using technology and reporting systems to avoid collisions. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2Fwww.conservationevidence.com%2Factions%2F3535https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3535Tue, 07 Dec 2021 16:02:55 +0000Collected Evidence: Collected Evidence: Use visual or acoustic deterrents to discourage reptiles from approaching vessels We found no studies that evaluated the effects on reptile populations of using visual or acoustic deterrents to discourage reptiles from approaching vessels. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2Fwww.conservationevidence.com%2Factions%2F3536https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3536Tue, 07 Dec 2021 16:06:10 +0000Collected Evidence: Collected Evidence: Modify vessels to reduce or prevent injuries to reptiles from collisions Two studies evaluated the effects on reptile populations of modifying vessels to reduce or prevent injuries to reptiles from collisions. Both studies were in the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (2 STUDIES) Survival (2 studies): One controlled study found that using a horizontal-fin propeller guard or a cage propeller guard did not reduce catastrophic injuries to artificial loggerhead turtle shells compared to using no guard, but that the types of injuries sustained were different. One controlled study found that using a jet drive outboard motor reduced catastrophic injuries to artificial loggerhead turtle shells compared to using a standard outboard motor. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3537https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3537Tue, 07 Dec 2021 16:07:29 +0000
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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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