Collected Evidence: Collected Evidence: Alter road surfaces One study evaluated the effects of altering road surfaces on reptile populations. This study was in Canada. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (1 STUDY) Use (1 study): One replicated study in Canada found that paved roads were not used more by Blanding’s turtles than unpaved roads. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3504https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3504Mon, 06 Dec 2021 18:00:05 +0000Collected Evidence: Collected Evidence: Add lights to fishing gear Five studies evaluated the effects of adding lights to fishing gear on reptile populations. Two studies were in the Baja California peninsula (Mexico) and one was in each of Sechura Bay (Peru), the Atlantic and North Pacific and the Adriatic Sea. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Survival (1 study): One randomized, controlled, paired study in the Adriatic Sea found that no loggerhead turtles were caught and died in in gillnets with UV lights whereas some did in nets without lights. BEHAVIOUR (0 STUDIES) OTHER (5 STUDIES) Unwanted catch (5 studies): Four controlled studies (including three replicated and two paired studies) in the Baja California peninsula, Sechura Bay and the Adriatic Sea found that gillnets with LED lights, light sticks or UV lights caught fewer green turtles and loggerhead turtles than nets without lights. One replicated study in the Atlantic and North Pacific found mixed effects of increasing the number of light sticks on longlines on the chance of catching loggerhead and leatherback turtles. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3554https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3554Wed, 08 Dec 2021 13:59:36 +0000Collected Evidence: Collected Evidence: Add chemicals or minerals to sediment to remove or neutralize pollutants We found no studies that evaluated the effects on reptile populations of adding chemicals or minerals to sediment to remove or neutralize pollutants. ‘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%2F3562https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3562Wed, 08 Dec 2021 14:50:43 +0000Collected Evidence: Collected Evidence: Augment ponds with ground water to reduce acidification We found no studies that evaluated the effects on reptile populations of augmenting ponds with ground water to reduce acidification. ‘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%2F3591https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3591Wed, 08 Dec 2021 16:20:49 +0000Collected Evidence: Collected Evidence: Alter water flow rates One study evaluated the effects of altering water flow rates on reptile populations. This study was in Australia. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Abundance (1 study): One before-and-after study in Australia found that releasing a large flow of water into a wetland system had mixed effects on relative abundance of eastern long-necked turtles and the number of turtles caught. Condition (1 study): One before-and-after study in Australia found that after releasing a large flow of water into a wetland system, body condition of eastern long-necked turtles improved. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3666https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3666Fri, 10 Dec 2021 11:17:59 +0000Collected Evidence: Collected Evidence: Armour shorelines to prevent erosion We found no studies that evaluated the effects of armouring shorelines to prevent erosion 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%2F3670https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3670Fri, 10 Dec 2021 11:37:19 +0000Collected Evidence: Collected Evidence: Add woody debris to landscapes Six studies evaluated the effects of adding woody debris to landscapes on reptile populations. Three studies were in Australia, two were in the USA and one was in Indonesia. COMMUNITY RESPONSE (3 STUDIES) Richness/diversity (5 studies): Four of five studies (including four replicated, randomized, controlled studies) in the USA, Indonesia and Australia found that areas with added woody debris had similar richness and diversity or richness or of reptiles, rare reptiles and snakes and lizards compared to areas with no added debris. The other study found that areas with added woody debris had higher reptile species richness than areas with no added debris. POPULATION RESPONSE (6 STUDIES) Abundance (6 studies): Two of six replicated studies (including four randomized, controlled studies) in Australia, Indonesia and the USA found that areas with added woody debris had a higher abundance of reptiles than areas with no added debris. Three studies found that areas with woody debris had a similar abundance of reptiles and snakes and lizards compared to areas with no added debris. The other study found that pastures with added timber had lower abundance of rare reptile species compared to pastures without timber, but that in pastures with added timber, reptile abundance was higher after 15 months than after 12 months. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3718https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3718Mon, 13 Dec 2021 15:33:28 +0000Collected Evidence: Collected Evidence: Alter incubation temperatures to achieve optimal/desired sex ratio: Sea turtles One study evaluated the effects of altering incubation temperatures to achieve optimal/desired sex ratios on sea turtles. This study was in Canada. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Reproductive success (1 study): One replicated study in Canada reported that hatching success of two clutches of artificially incubated green turtle eggs was 8% and 62%. BEHAVIOUR (0 STUDIES) OTHER (1 STUDY): Offspring sex ratio (1 study): One replicated study in Canada found that incubating green turtle eggs at higher temperatures resulted in more females hatchlings. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3761https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3761Tue, 14 Dec 2021 16:09:09 +0000Collected Evidence: Collected Evidence: Alter incubation temperatures to achieve optimal/desired sex ratio: Tortoises, terrapins, side-necked & softshell turtles Eight studies evaluated the effects of altering incubation temperatures to achieve optimal/desired sex ratios on tortoise, terrapin, side-necked and softshell turtle populations. Four studies were in the USA, two were in Columbia and one was in each of Brazil and the Galápagos. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (5 STUDIES) Reproductive success (5 studies): Four studies (including two replicated studies) in the USA, Colombia and the Galápagos found that hatching success of alligator snapping turtle, Magdalena river turtle, western pond turtle and Española giant tortoise eggs varied across the range of temperatures tested. One controlled study in Brazil found that Amazon River turtle nests covered with black plastic sheeting had lower hatching success than uncovered nests. BEHAVIOUR (0 STUDIES) OTHER (8 STUDIES): Offspring sex ratio (8 studies): Seven studies (including three replicated, randomized studies) in the USA, Colombia and the Galápagos found that hatchling sex ratio of turtles and tortoises was affected by incubation temperature, and that warmer temperatures resulted in more female hatchlings. One controlled study in Brazil found that Amazon River turtle nests covered with black plastic sheeting produced more female hatchlings than uncovered nests. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3762https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3762Tue, 14 Dec 2021 16:12:00 +0000Collected Evidence: Collected Evidence: Alter incubation temperatures to achieve optimal/desired sex ratio: Snakes & lizards Four studies evaluated the effects of altering incubation temperatures to achieve optimal/desired sex ratios on snake and lizard populations. Two studies were in each of the USA and China. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (3 STUDIES) Reproductive success (3 studies): Two replicated studies (including one randomized study) in China and the USA found that toad-headed agama hatching success was lowest at the highest incubation temperature tested and southern alligator lizard hatching success was highest at intermediate temperatures.One randomized study in the USA found that survival of garter snake offspring was highest when females were maintained at intermediate temperatures. BEHAVIOUR (0 STUDIES) OTHER (4 STUDIES): Offspring sex ratio (4 studies): Three replicated studies (including two randomized studies) in China and the USA found that hatchling sex ratio of stripe-tailed ratsnakes, toad-headed agamas and southern alligator lizard was not affected by incubation temperature. One randomized study in the USA found that sex ratio of live garter snake offspring was not affected by the temperature females were maintained at. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3763https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3763Tue, 14 Dec 2021 16:36:15 +0000Collected Evidence: Collected Evidence: Alter incubation temperatures to achieve optimal/desired sex ratio: Crocodilians Three studies evaluated the effects of altering incubation temperatures to achieve optimal/desired sex ratios on crocodilian populations. Two studies were in Argentina and one was in China. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (2 STUDIES) Reproductive success (2 studies): Two replicated, randomized study in Argentina found that hatching success of broad-snouted caiman eggs was similar across all temperatures tested. BEHAVIOUR (0 STUDIES) OTHER (3 STUDIES): Offspring sex ratio (3 studies): Two replicated, randomized studies in Argentina found that hatchling sex ratio of broad-snouted caimans was affected by temperature, and that warmer temperatures resulted in fewer females. One replicated study in China found that exposing Chinese alligator eggs to short periods of high temperatures during incubation resulted in fewer female hatchlings. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3764https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3764Tue, 14 Dec 2021 16:44:08 +0000Collected Evidence: Collected Evidence: Alter incubation temperatures to achieve optimal/desired sex ratio: Tuatara Two studies evaluated the effects of altering incubation temperatures to achieve optimal/desired sex ratios on tuatara populations. Both studies were in New Zealand. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (0 STUDIES) OTHER (2 STUDIES): Offspring sex ratio (2 studies): Two replicated studies (including one controlled study) in New Zealand found that hatchling sex ratio of tuatara was affected by temperature, and that warmer temperatures resulted in more males. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3765https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3765Tue, 14 Dec 2021 17:00:12 +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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