Collected Evidence: Collected Evidence: Provide training and tools for safe release of mammals captured by fisheries We found no studies that evaluated the effects of providing training and tools for the safe release of mammals captured by fisheries on marine and freshwater mammal 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%2F2830https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2830Fri, 05 Feb 2021 16:03:59 +0000Collected Evidence: Collected Evidence: Introduce legislation to prohibit or restrict the use of fishing gear types or methods that are harmful to mammals We found no studies that evaluated the effects of introducing legislation to prohibit or restrict the use of fishing gear types or methods that are harmful to mammals on marine and freshwater mammal 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%2F2831https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2831Fri, 05 Feb 2021 16:05:04 +0000Collected Evidence: Collected Evidence: Enforce legislation to control illegal fishing using gear or methods that are harmful to mammals We found no studies that evaluated the effects of enforcing legislation to control illegal fishing using gear or methods that are harmful to mammals on marine and freshwater mammal 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%2F2832https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2832Fri, 05 Feb 2021 16:05:50 +0000Collected Evidence: Collected Evidence: Involve fishers in designing and trialling new fishing gear types to encourage uptake of gear that reduces unwanted catch of mammals We found no studies that evaluated the effects of involving fishers in designing and trialling new fishing gear types to encourage uptake of gear that reduces unwanted catch of mammals on marine and freshwater mammal 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%2F2833https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2833Fri, 05 Feb 2021 16:06:36 +0000Collected Evidence: Collected Evidence: Introduce fishing gear exchange programmes to encourage fishers to use gear that reduces unwanted catch of mammals We found no studies that evaluated the effects of introducing fishing gear exchange programmes to encourage fishers to use gear that reduces unwanted catch of mammals on marine and freshwater mammal 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%2F2834https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2834Fri, 05 Feb 2021 16:07:26 +0000Collected Evidence: Collected Evidence: Finance low interest loans to convert to fishing gear that reduces unwanted catch of mammals We found no studies that evaluated the effects of financing low interest loans to convert to fishing gear that reduces unwanted catch of mammals on marine and freshwater mammal 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%2F2835https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2835Fri, 05 Feb 2021 16:08:28 +0000Collected Evidence: Collected Evidence: Promote fish and seafood certification (e.g. ecolabels) to reduce consumer demand for fisheries that threaten mammals We found no studies that evaluated the effects of promoting fish and seafood certification (e.g. ecolabels) to reduce consumer demand for fisheries that threaten mammals on marine and freshwater mammal 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%2F2836https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2836Fri, 05 Feb 2021 16:09:36 +0000Collected Evidence: Collected Evidence: Educate the public to reduce consumer demand for fisheries that threaten mammals We found no studies that evaluated the effects of educating the public to reduce consumer demand for fisheries that threaten mammals on marine and freshwater mammal 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%2F2837https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2837Fri, 05 Feb 2021 16:10:27 +0000Collected Evidence: Collected Evidence: Introduce permits or licences for marine and freshwater mammal watching tours We found no studies that evaluated the effects of introducing permits or licences for marine and freshwater mammal watching tours on marine and freshwater mammal 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%2F2839https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2839Fri, 05 Feb 2021 16:17:40 +0000Collected Evidence: Collected Evidence: Introduce regulations for the use of underwater drones in proximity to marine and freshwater mammals We found no studies that evaluated the effects of introducing regulations for the use of underwater drones in proximity to marine and freshwater mammals. ‘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%2F2846https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2846Fri, 05 Feb 2021 16:35:33 +0000Collected Evidence: Collected Evidence: Use automated detection systems to prevent flood gates and locks from closing when mammals are present We found no studies that evaluated the effects of using automated detection systems to prevent flood gates and locks from closing when mammals are present on marine and freshwater mammal 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%2F2849https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2849Fri, 05 Feb 2021 16:38:30 +0000Collected Evidence: Collected Evidence: Translocate or temporarily bring marine and freshwater mammals into captivity to reduce exposure to disease We found no studies that evaluated the effects of translocating or temporarily bringing marine and freshwater mammals into captivity to reduce exposure to disease. ‘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%2F2859https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2859Mon, 08 Feb 2021 11:18:11 +0000Collected Evidence: Collected Evidence: Use biodegradable fishing gear We found no studies that evaluated the effects of using of biodegradable fishing gear on marine and freshwater mammal 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%2F2885https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2885Mon, 08 Feb 2021 11:48:20 +0000Collected Evidence: Collected Evidence: Recover lost or discarded fishing gear We found no studies that evaluated the effects of recovering lost or discarded fishing gear on marine and freshwater mammal 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%2F2886https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2886Mon, 08 Feb 2021 11:49:11 +0000Collected Evidence: Collected Evidence: Equip ports with dedicated fishing gear disposal facilities We found no studies that evaluated the effects of equipping ports with dedicated fishing gear disposal facilities on marine and freshwater mammal 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%2F2888https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2888Mon, 08 Feb 2021 11:50:38 +0000Collected Evidence: Collected Evidence: Improve methods for locating fishing gear We found no studies that evaluated the effects of improving methods for locating fishing gear on marine and freshwater mammal 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%2F2889https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2889Mon, 08 Feb 2021 11:51:49 +0000Collected Evidence: Collected Evidence: Establish fishing gear registration programmes We found no studies that evaluated the effects of establishing fishing gear registration programmes on marine and freshwater mammal 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%2F2890https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2890Mon, 08 Feb 2021 11:52:28 +0000Collected Evidence: Collected Evidence: Install stormwater traps or grids We found no studies that evaluated the effects of installing stormwater traps or grids on marine and freshwater mammal 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%2F2894https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2894Mon, 08 Feb 2021 11:58:26 +0000Collected Evidence: Collected Evidence: Remove litter from marine and freshwater environments We found no studies that evaluated the effects of removing litter from marine and freshwater environments on marine and freshwater mammal 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%2F2895https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2895Mon, 08 Feb 2021 11:59:16 +0000Collected Evidence: Collected Evidence: Use alternative methods instead of airguns for seismic surveys We found no studies that evaluated the effects of using alternative methods instead of airguns for seismic surveys on marine and freshwater mammal 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%2F2899https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2899Mon, 08 Feb 2021 16:10:05 +0000Collected Evidence: Collected Evidence: Reduce hammer energy during pile driving We found no studies that evaluated the effects of reducing hammer energy during pile driving on marine and freshwater mammal 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%2F2900https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2900Mon, 08 Feb 2021 16:10:51 +0000Collected Evidence: Collected Evidence: Limit, cease or prohibit the use of sonars We found no studies that evaluated the effects of limiting, ceasing or prohibiting the use of sonars on marine and freshwater mammal 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%2F2902https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2902Mon, 08 Feb 2021 16:13:57 +0000Collected Evidence: Collected Evidence: Limit, cease or prohibit the use of underwater explosives We found no studies that evaluated the effects of limiting, ceasing or prohibiting the use of underwater explosives on marine and freshwater mammal 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%2F2903https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2903Mon, 08 Feb 2021 16:14:39 +0000Collected Evidence: Collected Evidence: Modify vessels to reduce noise disturbance We found no studies that evaluated the effects of modifying vessels to reduce noise disturbance on marine and freshwater mammal 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%2F2904https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2904Mon, 08 Feb 2021 16:15:34 +0000Collected Evidence: Collected Evidence: Use non-toxic antifouling coatings on surfaces We found no studies that evaluated the effects of using non-toxic antifouling coatings on surfaces, on marine and freshwater mammal 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%2F2908https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2908Mon, 08 Feb 2021 16:19:22 +0000
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.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 21

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust