Collected Evidence: Collected Evidence: Remove and relocate ‘problem’ animals One replicated, before-and-after study in India found that ‘problem’ rhesus monkeys that were translocated, alongside other interventions, survived and remained at the release sites for at least four years. One controlled, before-and-after study in Kenya found that after 16 years, most crop-raiding olive baboons that were translocated from farmland, alongside other interventions, had survived and had similar survival rates compared to non-translocated populations. One before-and-after, site comparison study in the Republic of Congo and Gaboon found that 84% of the ‘problem’ western lowland gorillas that were relocated, alongside other interventions, survived for at least four years. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1422https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1422Tue, 17 Oct 2017 09:04:32 +0100Collected Evidence: Collected Evidence: Prohibit (livestock) farmers from entering protected areas One before-and-after, site comparison in Rwanda found that the number of young gorillas increased after cattle were removed from a protected area, alongside other interventions. A before-and-after study in Rwanda, Uganda, and the Democratic Republic of Congo found that a mountain gorilla population decreased over time following the removal of livestock from a number of protected areas, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1432https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1432Tue, 17 Oct 2017 09:58:38 +0100Collected Evidence: Collected Evidence: Humans chase primates using random loud noise One controlled, replicated, before-and-after study in Indonesia found that in areas where noise deterrents were used, along with tree nets, crop raiding by orangutans was reduced. One study in the Democratic Republic Congo found that chasing gorillas and using random noise resulted in the return of gorillas from plantations to areas close to protected forest. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1449https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1449Tue, 17 Oct 2017 11:53:30 +0100Collected Evidence: Collected Evidence: Install rope or pole (canopy) bridges One study in Brazil found that black lion tamarins and capuchins used a pole bridge to cross a road. One before-and-after study in Belize found that a black howler monkey population increased after the construction of pole bridges over man-made gaps. One before-and-after study in Madagascar found that all six monitored lemur species used bridges to cross roads and pipelines. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1457https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1457Tue, 17 Oct 2017 13:28:40 +0100Collected Evidence: Collected Evidence: Regularly de-activate/remove ground snares One before-and-after study in the Democratic Republic of Congo and Rwanda found that mountain gorilla numbers increased over five years in an area that was patrolled for snares, alongside other interventions. One before-and-after study in the Democratic Republic of Congo, Rwanda and Uganda found that a mountain gorilla population declined in an area where snares were removed regularly, alongside other interventions. One before-and-after study in Ghana found that the number of snares declined in an area where they were regularly removed, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1475https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1475Tue, 17 Oct 2017 17:15:09 +0100Collected Evidence: Collected Evidence: Provide better equipment (e.g. guns) to anti-poaching ranger patrols One before-and-after study in the Democratic Republic of Congo and Rwanda found that gorilla populations increased after anti-poaching guard were provided with better equipment, alongside other interventions. One study in Uganda found that no gorillas were killed for 21 months after game guards were provided with better equipment, alongside other interventions. One before-and-after study in Rwanda found that the number of immature gorillas increased and the number of snares decreased after anti-poaching patrols were supplied with better equipment, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1476https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1476Tue, 17 Oct 2017 17:22:29 +0100Collected Evidence: Collected Evidence: Implement community control of patrolling, banning hunting and removing snares A site comparison study in the Democratic Republic of Congo found that community control was more effective at reducing illegal bushmeat hunting, including primates, compared to the nearby national park. A before-and-after study in Cameroon found that no incidents of gorilla poaching occurred over three years after implementation of community control and monitoring of illegal activities. A site comparison study in Nigeria found that there were more gorillas and chimpanzees in an area managed by a community conservation organisation than in areas not managed by local communities. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1482https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1482Tue, 17 Oct 2017 19:12:50 +0100Collected Evidence: Collected Evidence: Use selective logging instead of clear-cutting One site comparison in Sierra Leone found that primate densities were higher in forest that had been logged at low intensity than in a forest logged at high intensity. One before-and-after study in Madagascar found that the number of lemurs increased following selective logging. One site comparison study in Uganda found that primate densities were similar in forest that had been logged at low intensity and forest logged at high intensity. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1485https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1485Tue, 17 Oct 2017 19:26:45 +0100Collected Evidence: Collected Evidence: Provide monetary benefits to local communities for sustainably managing their forest and its wildlife (e.g. REDD, employment) One before-and-after study in Belize found that numbers of black howler monkeys increased by 138% over 13 years after local communities received monetary benefits, alongside other interventions. One before-and-after study in the Republic of Congo found that most central chimpanzees reintroduced to an area where local communities received monetary benefits, alongside other interventions, survived over five years. One before-and-after study in Rwanda, Uganda and the Democratic Republic of Congo found that numbers of mountain gorillas declined by 28% over 41 years despite the implementation of development projects in nearby communities, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1509https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1509Wed, 18 Oct 2017 15:15:52 +0100Collected Evidence: Collected Evidence: Provide non-monetary benefits to local communities for sustainably managing their forest and its wildlife (e.g. better education, infrastructure development) One before-and-after study in the Republic of Congo found that 70% of the central chimpanzees reintroduced to an area where local people were provided non-monetary benefits, alongside other interventions, survived over seven years. One before-and-after study in India found that numbers of hoolock gibbons increased by 66% over five years after providing local communities with alternative income, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1510https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1510Wed, 18 Oct 2017 15:39:00 +0100Collected Evidence: Collected Evidence: Resettle illegal human communities (i.e. in a protected area) to another location One review on mountain gorillas in Uganda found that no more gorillas were killed after illegal settlers were relocated from the area, alongside other interventions. One before-and-after study in the Republic of Congo found that most reintroduced chimpanzees survived over five years after human communities were resettled, from the protected area alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1515https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1515Thu, 19 Oct 2017 09:12:23 +0100Collected Evidence: Collected Evidence: Habituate primates to human presence to reduce stress from tourists/researchers etc. A before-and-after study in Brazil found that an introduced population of golden lion tamarins declined after one year, following habituation to human presence, alongside other interventions. A before-and-after study in Madagascar found that the majority of introduced black-and-white ruffed lemurs and diademed sifakas survived over 30 months, following habituation to human presence, alongside other interventions. A controlled, before-and-after study in Rwanda, Uganda, and Democratic Republic of Congo found that a mountain gorilla population increased over 41 years, following habituation to human presence, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1519https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1519Thu, 19 Oct 2017 09:30:50 +0100Collected Evidence: Collected Evidence: Regularly provide supplementary food to primates during resource scarce periods only One before-and-after study in the Republic of Congo found that the majority of chimpanzees survived for at least five years after supplementary feeding in resource scarce periods, alongside other interventions. One before-and-after study in Kenya found that wild olive baboons survived for at least 17 years after supplementary feeding in drought periods soon after translocation, alongside other interventions. One controlled study in Madagascar found that the diet of black-and-white ruffed lemurs was similar to that of wild individuals after supplementary feeding in resource scarce periods, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1527https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1527Thu, 19 Oct 2017 09:59:24 +0100Collected Evidence: Collected Evidence: Provide additional sleeping platforms/nesting sites for primates One before-and-after study in Brazil found that a translocated lion tamarin population declined after artificial nest boxes were provided, alongside other interventions. One before-and-after study in Brazil found that a majority of reintroduced golden lion tamarins died seven years after artificial nest boxes were provided, alongside other interventions. One before-and-after study in Gabon found that a majority of juvenile western lowland gorillas survived for at least seven years after nesting platforms were provided, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1530https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1530Thu, 19 Oct 2017 10:22:21 +0100Collected Evidence: Collected Evidence: Provide artificial water sources One before-and-after trial in Brazil found that a minority of reintroduced golden lion tamarins survived over seven years when provided with supplementary water, alongside other interventions. One before-and-after study in Madagascar found that a minority of reintroduced black-and-white ruffed lemurs survived for five years despite being provided with supplementary water, alongside other interventions. A before-and-after study in South Africa found that a minority of vervet monkeys had survived for 10 months when provided with supplementary water, alongside other interventions. A before-and-after study in Gabon found that a majority of western lowland gorillas survived for at least nine months while being provided with supplementary water, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1531https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1531Thu, 19 Oct 2017 10:26:56 +0100Collected Evidence: Collected Evidence: Wear face-masks to avoid transmission of viral and bacterial diseases to primates One study in Uganda found that a confiscated young chimpanzee was reunited with its mother after being handled by caretakers wearing face-masks, alongside other interventions. One before-and-after study in Rwanda, Uganda and the Democratic Republic of Congo found that numbers of mountain gorillas increased by 168% over 41 years while being visited by researchers and visitors wearing face-masks, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1537https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1537Thu, 19 Oct 2017 13:58:17 +0100Collected Evidence: Collected Evidence: Keep safety distance to habituated animals One before-and-after study in the Democratic Republic of Congo found that most reintroduced chimpanzees survived over five years after being followed from a distance of 5–100 m, alongside other interventions. One controlled study in Malaysia found that the number of reintroduced orangutans declined by 33% over 31 years despite visitors being required to keep a safety distance to the animals, alongside other interventions. One before-and-after study in Rwanda, Uganda and Congo found that numbers of mountain gorillas increased by 168% over 41 years while being observed from a safety distance, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1538https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1538Thu, 19 Oct 2017 14:38:23 +0100Collected Evidence: Collected Evidence: Limit time that researchers/tourists are allowed to spend with habituated animals One controlled study in Indonesia found that reintroduced Sumatran orangutans that spent limited time with caretakers acted more similar to wild orangutans than orangutans that spend more time with caretakers, alongside other interventions. One before-and-after study in Rwanda, Uganda and the Democratic Republic of Congo found that numbers of mountain gorillas increased by 168% over 41 years while being visited by researchers and visitors during a restricted amount of time, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1539https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1539Thu, 19 Oct 2017 15:12:10 +0100Collected Evidence: Collected Evidence: Ensure that researchers/tourists are up-to-date with vaccinations and healthy One controlled study in Malaysia found that a population of reintroduced orangutans decreased by 33% over 33 years despite staff and volunteers having received medical checks, alongside other interventions. One before-and-after study in Rwanda, Uganda and Congo found that mountain gorilla numbers increased by 168% over 41 years while sick/unwell researchers and visitors were not allowed to visit gorillas, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1546https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1546Thu, 19 Oct 2017 17:30:11 +0100Collected Evidence: Collected Evidence: Preventative vaccination of habituated or wild primates One before-and-after study in Puerto Rico found that annual mortality of rhesus macaques decreased after a preventive tetanus vaccine campaign, alongside other interventions. Two before-and-after studies in the Republic of Congo found that 70% of reintroduced chimpanzees vaccinated against poliomyelitis and tetanus, alongside other interventions, survived over 3.5-5 years after release. One before-and-after study in the Republic of Congo and Gabon found that more than 80% of the reintroduced gorillas that received preventive vaccination, alongside other interventions, survived over a 10 year period. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1549https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1549Thu, 19 Oct 2017 17:45:11 +0100Collected Evidence: Collected Evidence: Involve local community in primate research and conservation management One before-and-after study in Uganda found that a reintroduced chimpanzee repeatedly returned to human settlements despite the involvement of local communities in the reintroduction project, alongside other interventions. One before-and-after study in Belize found that numbers of black howler monkeys increased over 13 years while local communities were involved in the management of the sanctuary, alongside other interventions. One before-and-after study in Rwanda, Uganda and the Democratic Republic of Congo found that mountain gorilla numbers decreased over 41 years despite the implementation of an environmental education programme, alongside other interventions. One before-and-after study in Cameroon found that incidents of gorilla poaching stopped after the implementation of a community-based monitoring scheme, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1565https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1565Fri, 20 Oct 2017 10:26:50 +0100Collected Evidence: Collected Evidence: Establish areas for conservation which are not protected by national or international legislation (e.g. private sector standards & codes) One before-and-after study in Rwanda and Republic of Congo found that mountain gorilla numbers increased by 15% over five years after the implementation of a conservation project funded by a consortium of organizations, alongside other interventions. One before-and-after study in Belize found that black howler monkey numbers increased by 138% over 13 years after being protected by the local community, alongside other interventions. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1579https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1579Fri, 20 Oct 2017 12:57:53 +0100Collected Evidence: Collected Evidence: Captive breeding and reintroduction of primates into the wild: born and reared in cages One before-and-after study in Brazil found that most reintroduced golden lion tamarins that were born and reared in cages, alongside other interventions, did not survive over seven years or had a higher mortality than wild-born tamarins. One controlled study in French Guiana found that more squirrel monkeys which were born and reared in cages, alongside other interventions, died or were returned to captivity post-reintroduction compared to wild-born monkeys. One controlled study in Madagascar found that the diet of reintroduced black-and-white ruffed lemurs which were born and reared in cages, alongside other interventions, did not overlap with that of wild lemurs. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1594https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1594Fri, 20 Oct 2017 14:33:22 +0100Collected Evidence: Collected Evidence: Captive breeding and reintroduction of primates into the wild: limited free-ranging experience One controlled study in Madagascar found that the diet of reintroduced black-and-white ruffed lemurs with limited free-ranging experience, alongside other interventions, overlapped with that of wild lemurs. One before-and-after study in Madagascar found that most reintroduced black-and-white ruffed lemurs with limited free-ranging experience, alongside other interventions, died over five years. One before-and-after and site comparison and one before-and-after study in the Republic of Congo and Gabon found that most reintroduced western lowland gorillas with limited free-ranging experience, alongside other interventions, survived over a period of between nine months and four years. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1595https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1595Fri, 20 Oct 2017 14:36:52 +0100Collected Evidence: Collected Evidence: Captive breeding and reintroduction of primates into the wild: born and raised in a free-ranging environment One before-and-after study in Brazil found that only two out of three reintroduced black lion tamarins survived over four months, despite being raised in a free-ranging environment, alongside other interventions. One controlled study in Madagascar found that the diet of reintroduced black-and-white ruffed lemurs that were born and raised in a free-ranging environment alongside other interventions, overlapped with that of wild lemurs. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1596https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1596Fri, 20 Oct 2017 14:44:59 +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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