Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Relocate nests/eggs to a nearby natural setting (not including hatcheries): Snakes & lizards We found no studies that evaluated the effects of relocating nests/eggs to a nearby natural setting 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%2F3769https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3769Tue, 14 Dec 2021 17:56:49 +0000Collected Evidence: Collected Evidence: Relocate nests/eggs to a nearby natural setting (not including hatcheries): Sea turtles Thirteen studies evaluated the effects of relocating nests/eggs to a nearby natural setting on sea turtle populations. Five studies were in the USA, two were in Suriname and the US Virgin Islands and one was in each of Costa Rica, Ascension Island, Brazil and Cape Verde. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (12 STUDIES) Reproductive success (12 studies): Four of 12 controlled studies (including three replicated, randomized studies) in the USA, Suriname, US Virgin Islands, Costa Rica, Ascension Island, Brazil and Cape Verde found that relocated sea turtle nests had lower hatching success than natural nests in six of seven years, in 26 of 29 years, or lower hatching success than nests laid above the tidal zone, or that nests relocated >10 days after being laid had lower hatching and emergence success than natural nests or nests relocated within 12 hours. One of those studies also found that relocating nests within 12 hours had mixed effects on hatching and emergence success compared to natural nests. One study also found that two different egg collecting methods resulted in either more dead early stage or late-stage embryos. Four of the studies found that relocated sea turtle nests had similar hatching and emergence success or hatching success compared to natural nests and specifically compared to those laid in safer parts of the beach or above the high tide line. One of those studies also found that relocated nests experienced similar levels of predation by ghost crabs as natural nests. One of the studies also found that fewer relocated nests failed completely due to tidal flooding compared to natural nests. One of the studies found that relocated loggerhead turtle nests had higher hatching success than natural nests. One of the studies found that relocated leatherback turtle nests had higher hatching success compared to natural nests that were washed over by sea swells, but similar hatching success compared to natural nests that were not washed over by sea swells. The other two studies found that relocating sea turtle nests had mixed effects on hatching or hatching and emergence success compared to natural nests. One of those studies also found that in years when leatherback turtle nests were relocated, fewer were lost to erosion than when no relocations took place. Condition (1 study): One replicated, randomized, controlled study in the USA found that hatchlings from relocated loggerhead turtle nests were a similar size to hatchlings from natural nests. BEHAVIOUR (0 STUDIES) OTHER (1 STUDY) Offspring sex ratio (1 study): One replicated, randomized, controlled study in Suriname found that relocated leatherback turtle nests produced all female hatchlings, whereas 30–100% of hatchlings from naturally incubated nests were female. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3781https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3781Wed, 15 Dec 2021 14:46:00 +0000Collected Evidence: Collected Evidence: Relocate nests/eggs to a nearby natural setting (not including hatcheries): Tortoises, terrapins, side-necked & softshell turtles Four studies evaluated the effects of relocating nests/eggs to a nearby natural setting on tortoise, terrapin, side-necked & softshell turtle One study was in each of Venezuela, Columbia, Canada and the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (4 STUDIES) Reproductive success (4 studies): Two of four replicated, controlled studies in Venezuela, Columbia, Canada and the USA found that relocated Arrau turtle and Magdalena river turtle nests had similar hatching success compared to natural nests. One of the studies found that painted turtle and snapping turtle nests relocated to artificial nest mounds had higher hatching success than natural nests. The other study found that relocating diamondback terrapin nests to artificial nest mounds had mixed effects on hatching success compared to natural nests. Survival (1 study): One replicated, controlled study in Venezuela found that Arrau turtle hatchlings from relocated nests had lower survival during their first year compared to hatchlings from natural nests. Condition (2 studies): One replicated, controlled study in Venezuela found that Arrau turtle hatchlings from relocated nests had more physical abnormalities compared to hatchlings from natural nests. One replicated, controlled study in Columbia found that a similar number of eggs were infested by invertebrates and fungi in relocated and natural nests. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3782https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3782Wed, 15 Dec 2021 15:14:03 +0000Collected Evidence: Collected Evidence: Relocate nests/eggs to a nearby natural setting (not including hatcheries): Crocodilians We found no studies that evaluated the effects of relocating nests/eggs to a nearby natural setting on crocodile 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%2F3783https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3783Wed, 15 Dec 2021 15:24:24 +0000Collected Evidence: Collected Evidence: Relocate nests/eggs to a nearby natural setting (not including hatcheries): Tuatara We found no studies that evaluated the effects of relocating nests/eggs to a nearby natural setting 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%2F3784https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3784Wed, 15 Dec 2021 15:25:47 +0000