Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using artificial nest covers: Sea turtles Fifteen studies evaluated the effects of protecting nests and nesting sites from predation using artificial nest covers on sea turtle populations. Six studies were in the USA, two were in each of Turkey and Australia, and one was in each of Greece, Qatar, Indonesia, Cape Verde and Costa Rica. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (15 STUDIES) Reproductive success (15 studies): Eight of 14 studies (including 10 replicated, controlled studies) in the USA, Turkey, Qatar, Indonesia, Cape Verde, Australia and Costa Rica found that sea turtle, loggerhead, hawksbill and artificial sea turtle nests with artificial covers were predated less frequently than nests with no covers. Three studies found that covering sea turtle nests had mixed effects on predation, depending on predator species or year. One study found that loggerhead turtle nests with artificial covers were predated more frequently than nests with no covers. One study found that olive ridley turtle nests with and without artificial covers were all predated. The other study found that predation attempts of green and hawksbill turtle nests with artificial covers were similar compared to nests with no cover, but that predation success was affected by the cover design. Three studies also found that sea turtle and loggerhead turtle nests with artificial covers had higher hatching success than nests with no covers. One study also found that loggerhead turtle nests with artificial covers had similar hatching and emergence success compared to nests with no covers. One replicated, controlled study in Greece found that covering loggerhead turtle nests had mixed effects on hatching success compared to nests with no covers. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3686https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3686Fri, 10 Dec 2021 16:10:02 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using artificial nest covers: Tortoises, terrapins, side-necked & softshell turtles Seven studies evaluated the effects of protecting nests and nesting sites from predation using artificial nest covers on tortoise, terrapin, side-necked and softshell turtle populations. Five studies were in the USA and one was in each of the Galápagos and Canada. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (7 STUDIES) Reproductive success (7 studies): Two replicated studies (including one controlled study) in the Galápagos and the USA found that Galápagos giant tortoise nests surrounded by rock-walled corrals and bog turtle nests covered with cages were predated less frequently than unprotected nests. Two replicated studies (including one randomized, controlled study) in Canada and the USA found that nests of painted and snapping turtles and bog turtles covered with cages had similar hatching success compared to nests left uncovered. One of two replicated controlled studies (including one randomized study) in Canada and the USA found that painted and snapping turtle nests protected by three different cage types were predated a similar amount. The other study found mixed effects of different cage designs on predation rate of artificial nests at a diamondback terrapin nesting site. One replicated, before-and-after study in the USA found that diamondback terrapin nests covered by a nest box with an electrified wire were predated less frequently than nests under a box with no wire. One before-and-after study in the USA found that over half of eggs from bog turtle nests covered with cages in an area grazed by cattle hatched successfully. One replicated, controlled study in the USA found that diamondback terrapin nests covered with cages had hatching success of 55–93%, and 83–100% of uncaged nests were predated. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3687https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3687Fri, 10 Dec 2021 17:08:55 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using artificial nest covers: Snakes & lizards We found no studies that evaluated the effects of protecting nests and nesting sites from predation using artificial nest covers on snake and lizard 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%2Fconservationevidencejournal.com%2Factions%2F3688https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3688Fri, 10 Dec 2021 17:26:23 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using artificial nest covers: Crocodilians We found no studies that evaluated the effects of protecting nests and nesting sites from predation using artificial nest covers on crocodilian 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%2Fconservationevidencejournal.com%2Factions%2F3689https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3689Fri, 10 Dec 2021 17:28:19 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using artificial nest covers: Tuatara We found no studies that evaluated the effects of protecting nests and nesting sites from predation using artificial nest covers on tuatara 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%2Fconservationevidencejournal.com%2Factions%2F3690https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3690Fri, 10 Dec 2021 17:29:54 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation by camouflaging nests Two studies evaluated the effects of protecting nests and nesting sites from predation by camouflaging nests on reptile populations. One study was in the USA and one was in Costa Rica. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (2 STUDIES) Reproductive success (2 studies): One replicated, controlled study in the USA found that Ouachita map turtle nests that were disguised by sweeping with a broom were predated at a similar rate as unswept nests. One before-and-after, site comparison study in Costa Rica found that camouflaged (details of method not provided) olive ridley turtle nests had similar hatching and emergence success compared to nests moved to a hatchery. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3691https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3691Fri, 10 Dec 2021 17:31:50 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using visual deterrents One study evaluated the effects of protecting nests and nesting sites from predation using visual deterrents on reptile populations. This study was in Australia. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Reproductive success (1 study): One replicated, controlled study in Australia found that a similar number of loggerhead turtle nests marked with red flags were predated compared to those marked only with wooden stakes. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3692https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3692Fri, 10 Dec 2021 17:37:45 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation by creating new nesting sites One study evaluated the effects of protecting nests and nesting sites from predation by creating new nesting sites on reptile populations. This study was in Spain. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Reproductive success (1 study): One replicated, controlled study in Spain found that predation rate of artificial Hermann’s tortoise nests in newly created nesting sites was similar to the predation rate in natural nesting sites. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3693https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3693Fri, 10 Dec 2021 17:39:17 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using chemical deterrents Four studies evaluated the effects of protecting nests and nesting sites from predation using chemical deterrents on reptile populations. Two studies were in the USA and one was in each of Spain and Australia. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (4 STUDIES) Reproductive success (4 studies): Three of four controlled studies (including three replicated studies) in Spain, the USA and Australia found that a similar number of artificial Hermann’s tortoise nests, diamondback terrapin nests and loggerhead turtle nests that had chemical deterrents, pepper powder or chilli powder applied were predated compared to nests with no deterrent. The other study found that fewer loggerhead turtle nets that had habanero pepper powder applied to the surface were predated than nests with no pepper powder, or nest with pepper powder below the surface. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3694https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3694Fri, 10 Dec 2021 18:08:18 +0000Collected Evidence: Collected Evidence: Protect nests and nesting sites from predation using conditioned taste aversion One study evaluated the effects of protecting nests and nesting sites from predation using conditioned taste aversion on reptile populations. This study was in the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Reproductive success (1 study): One replicated, randomized, controlled, before-and-after study in the USA found that a similar number of loggerhead turtle nests were predated in areas of the beach where artificial nests containing unpalatable eggs were deployed (to condition taste aversion) compared to areas with no artificial nests with unpalatable eggs. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3695https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3695Fri, 10 Dec 2021 18:18:32 +0000