Collected Evidence: Collected Evidence: Primates: Present food in water (including dishes and ponds) One replicated, before-and-after study in the USA found that when exposed to water-filled troughs, monkeys were more active and increased their use of tools.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1320https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1320Wed, 12 Oct 2016 15:01:04 +0100Collected Evidence: Collected Evidence: Primates: Present food dipped in food colouring One before-and-after study in the USA found that when food was dipped in food colouring juvenile and adult orangutans ate more and took less time to consume it.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1322https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1322Wed, 12 Oct 2016 15:12:41 +0100Collected Evidence: Collected Evidence: Primates: Present food items whole instead of processed One before-and-after study in the USA found that when macaques were presented with whole foods instead of chopped foods the amount consumed and time spent feeding increased.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1323https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1323Wed, 12 Oct 2016 15:33:43 +0100Collected Evidence: Collected Evidence: Primates: Present feeds at different crowd levels One before-and-after study in the USA found that when smaller crowds were present foraging and object use in chimpanzees increased. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1324https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1324Wed, 12 Oct 2016 15:38:41 +0100Collected Evidence: Collected Evidence: Primates: Provide live vegetation in planters for foraging One replicated, before-and-after study in the USA reported that chimpanzees spent more time foraging when provided with planted rye grass and scattered sunflower seeds compared to browse and grass added to the enclosure with their normal diet.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1327https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1327Thu, 13 Oct 2016 08:18:54 +0100Collected Evidence: Collected Evidence: Primates: Provide cut branches (browse) One replicated, before-and-after study in the Netherlands and Germany found that when presented with stinging nettles captive gorillas used the same processing skills as wild gorillas to forage.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1332https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1332Thu, 13 Oct 2016 08:33:09 +0100Collected Evidence: Collected Evidence: Primates: Provide live invertebrates One before-and-after study in the UK found that when provided with live insect prey inactivity reduced and foraging increased in captive loris to levels seen in wild loris.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1333https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1333Thu, 13 Oct 2016 08:35:55 +0100Collected Evidence: Collected Evidence: Primates: Provide fresh produce One replicated, before-and-after study in the USA found that when fresh produce was offered instead of pellet feed more time was spent feeding and less time inactive in rhesus macaques.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1335https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1335Thu, 13 Oct 2016 08:40:05 +0100Collected Evidence: Collected Evidence: Amphibians: Manipulate humidity to improve development or survival to adulthood No evidence was captured for the effects of manipulating humidity to improve development or survival to adulthood. '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%2Fwww.conservationevidence.com%2Factions%2F1891https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1891Fri, 19 Jan 2018 14:52:17 +0000Collected Evidence: Collected Evidence: Amphibians: Manipulate quality and quantity of enclosure lighting to improve development or survival to adulthood No evidence was captured for the effects of manipulating quality and quantity of lighting to improve development or survival to adulthood. '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%2Fwww.conservationevidence.com%2Factions%2F1892https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1892Fri, 19 Jan 2018 14:54:25 +0000Collected Evidence: Collected Evidence: Amphibians: Allow adults to attend their eggs No evidence was captured for the effects of allowing adults to attend their eggs. '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%2Fwww.conservationevidence.com%2Factions%2F1895https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1895Fri, 19 Jan 2018 15:07:03 +0000Collected Evidence: Collected Evidence: Amphibians: Use artificial cloning from frozen or fresh tissue No evidence was captured for the effects of using artificial cloning from frozen or fresh tissue. '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%2Fwww.conservationevidence.com%2Factions%2F1898https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1898Fri, 19 Jan 2018 15:11:18 +0000Collected Evidence: Collected Evidence: Carnivores: Supplement meat-based diet with vitamins or minerals No evidence was captured for the effect of supplementing meat-based diets with vitamins or minerals on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1907https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1907Wed, 24 Jan 2018 10:39:15 +0000Collected Evidence: Collected Evidence: Carnivores: Supplement meat-based diet with fatty acids No evidence was captured for the evidence of supplementing diets with fatty acids on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1909https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1909Wed, 24 Jan 2018 10:42:24 +0000Collected Evidence: Collected Evidence: Carnivores: Alter food abundance or type seasonally No evidence was captured for the effects of altering food abundance or type seasonally on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1910https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1910Wed, 24 Jan 2018 10:42:25 +0000Collected Evidence: Collected Evidence: Carnivores: Provide food during natural active periods No evidence was captured for the effects of providing food during natural active periods. '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%2Fwww.conservationevidence.com%2Factions%2F1911https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1911Wed, 24 Jan 2018 10:43:17 +0000Collected Evidence: Collected Evidence: Carnivores: Increase variety of food items No evidence was captured on the effect of increasing the variety of food items on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1912https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1912Wed, 24 Jan 2018 10:43:54 +0000Collected Evidence: Collected Evidence: Carnivores: Use of automated feeders No evidence was captured for the effects of using automated feeders on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1913https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1913Wed, 24 Jan 2018 10:44:47 +0000Collected Evidence: Collected Evidence: Carnivores: Alter feeding schedule according to visitor activity No evidence was captured for the effects of altering feeding schedule to visitor activity on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1914https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1914Wed, 24 Jan 2018 10:46:41 +0000Collected Evidence: Collected Evidence: Carnivores: Provide food during visitor experiences No evidence was captured for the effects of feeding during visitor experiences on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1916https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1916Wed, 24 Jan 2018 10:48:57 +0000Collected Evidence: Collected Evidence: Carnivores: Feed individuals separately No evidence was captured for the effects of feeding individuals separately on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1917https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1917Wed, 24 Jan 2018 10:50:39 +0000Collected Evidence: Collected Evidence: Carnivores: Feed individuals within a social group No evidence was captured for the effects of feeding individuals within a social group. '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%2Fwww.conservationevidence.com%2Factions%2F1919https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1919Wed, 24 Jan 2018 10:53:13 +0000Collected Evidence: Collected Evidence: Carnivores: Hand-feed No evidence was captured for the effects of hand-feeding on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1920https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1920Wed, 24 Jan 2018 10:54:17 +0000Collected Evidence: Collected Evidence: Carnivores: Present food in/on water No evidence was captured on the effects of presenting food in/on water on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1922https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1922Wed, 24 Jan 2018 11:46:32 +0000Collected Evidence: Collected Evidence: Carnivores: Use food as a reward in animal training No evidence was captured for the effects of using food as a reward in animal training on captive carnivores. '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%2Fwww.conservationevidence.com%2Factions%2F1928https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1928Wed, 24 Jan 2018 12:35:13 +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