Collected Evidence: Collected Evidence: Food labelling schemes relating to biodiversity-friendly farming We captured no evidence for the effects of food labelling schemes on bird populations. '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%2F170https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F170Sun, 20 May 2012 13:07:59 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of gannets and boobies with wild conspecificsA small controlled study in Australia found that Australasian gannet chicks Morus serrator were lighter, and hatching and fledging success lower in nests which had an additional egg or chick added. However, overall productivity was (non-significantly) higher in experimental nests.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F507https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F507Thu, 06 Sep 2012 14:17:32 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of vultures with wild conspecificsTwo small studies, one a New World vulture and one of an Old World species found that single chicks were successfully adopted by foster conspecifics, although in one case this led to the death of one of the foster parents’ chicks.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F509https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F509Thu, 06 Sep 2012 14:34:30 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of raptors with wild conspecifics Ten out of 11 studies from across the world found that fostering raptor chicks to wild conspecifics had high success rates. A single study from the USA found that only one of six eggs fostered to wild bald eagle Haliaeetus leucocephalus nests were hatched and raised. The authors suggest that the other eggs may have been infertile. A replicated study from Spain found that Spanish imperial eagle Aquila adalberti chicks were no more likely to survive to fledging if they were transferred to foster nests from three chick broods (at high risk from siblicide), compared to chicks left in three-chick broods. A replicated study from Spain found that young (15–20 years old) Montagu's harrier Circus pygargus chicks were successfully adopted, but three older (27–29 day old) chicks were rejected.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F510https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F510Thu, 06 Sep 2012 14:42:31 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of owls with wild conspecifics A replicated study in the USA found high fledging rates for barn owl Tyto alba chicks fostered to wild pairs. A replicated controlled study from Canada found that captive-reared burrowing owl Athene cunicularia chicks fostered to wild nests did not have significantly lower survival or growth rates than wild chicks.    Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F511https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F511Thu, 06 Sep 2012 15:57:35 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of cranes with wild conspecificsA small study in Canada found high rates of fledging for whooping crane Grus americana eggs fostered to first time breeders (which normally have very low fertility).  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F512https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F512Thu, 06 Sep 2012 16:13:08 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of bustards with wild conspecificsA small study in Saudi Arabia found that a captive-bred egg was successfully fostered to a female in the wild.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F513https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F513Thu, 06 Sep 2012 16:18:42 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of parrots with wild conspecifics A replicated study from Venezuela found that yellow-shouldered Amazon Amazona barbadensis chicks had high fledging rates when fostered to conspecific nests in the wild. A second replicated study from Venezuela found significantly lower poaching rates of yellow-shouldered Amazons Amazona barbadensis when chicks were moved to foster nests closer to a field base.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F515https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F515Thu, 06 Sep 2012 16:34:58 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of petrels and shearwaters with wild non-conspecifics (cross-fostering)A replicated and partially controlled study from Hawaii found that Newell’s shearwater Puffinus newelli eggs fostered to wedge-tailed shearwater P. pacificus nests had high fledging rates.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F516https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F516Thu, 06 Sep 2012 16:54:21 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of ibises with wild non-conspecifics (cross-fostering)A 2007 literature review describes attempting to foster northern bald ibis Geronticus eremite chicks with cattle egrets Bubulcus ibis as unsuccessful.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F518https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F518Thu, 06 Sep 2012 17:07:49 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of cranes with wild non-conspecifics (cross-fostering)Two studies from the USA found low fledging success for cranes fostered to non-conspecifics’ nests.    Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F519https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F519Thu, 06 Sep 2012 17:13:19 +0100Collected Evidence: Collected Evidence: Foster eggs or chicks of songbirds with wild non-conspecifics (cross-fostering) A replicated study from the USA found that the survival of cross-fostered yellow warbler Dendroica petechia chicks was lower than previously-published rates for the species, although incubation and nestling periods were very similar. A replicated and controlled study from Norway found that the success of cross-fostering small songbirds varied depending on the species of chick and foster birds. However, only great tits P. major raised by blue tits P. caeruleus had lower pairing success than control birds, whilst blue tits raised by coal tits P. ater had higher recruitment than controls, or those raised by great tits.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F520https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F520Thu, 06 Sep 2012 17:37:20 +0100Collected Evidence: Collected Evidence: Floating pennywort: Biological control using native herbivores No evidence was captured on biological control of floating pennywort using native herbivores. '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%2F1124https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1124Tue, 13 Oct 2015 15:28:43 +0100Collected Evidence: Collected Evidence: Floating pennywort: Biological control using fungal-based herbicides No evidence was captured on biological control of floating pennywort using fungal-based herbicides. '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%2F1125https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1125Tue, 13 Oct 2015 15:29:58 +0100Collected Evidence: Collected Evidence: Floating pennywort: Physical removal A study in Western Australia found that following a two-week program of physical removal of floating pennywort, the rate of growth exceeded the rate of removal. A study in the UK, found that removal using a mechanical digger and monthly picking by hand greatly reduced the cover of floating pennywort but did not completely eradicate it. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1126https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1126Tue, 13 Oct 2015 15:33:08 +0100Collected Evidence: Collected Evidence: Floating pennywort: Chemical control using herbicides A controlled, replicated study in the UK found that the herbicide 2,4-D amine applied at 4.2 kg/ha achieved near to 100% mortality, compared with the herbicide glyphosate applied at 2.2 kg active ingredient/ha (without an adjuvant) which achieved  negligible mortality. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1127https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1127Tue, 13 Oct 2015 15:36:51 +0100Collected Evidence: Collected Evidence: Floating pennywort: Combination treatment using herbicides and physical removal A before-and-after study in Western Australia found that a combination of cutting followed by glyphosate chemical treatment, removed floating pennywort. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1128https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1128Tue, 13 Oct 2015 15:39:22 +0100Collected Evidence: Collected Evidence: Floating pennywort: Use of hydrogen peroxide A controlled, replicated pilot study in The Netherlands, found that hydrogen peroxide sprayed on potted floating pennywort plants resulted in curling and transparency of the leaves when applied at the highest tested concentration (30%), but this was still not sufficient to kill the plant.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1129https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1129Tue, 13 Oct 2015 15:41:57 +0100Collected Evidence: Collected Evidence: Floating pennywort: Use of liquid nitrogen No evidence was captured on the use of liquid nitrogen for control of floating pennywort. '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%2F1130https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1130Tue, 13 Oct 2015 15:43:21 +0100Collected Evidence: Collected Evidence: Floating pennywort: Flame treatment A controlled, replicated, pilot experiment in 2010 in The Netherlands, found that flame treatments of 1, 2 or 3 seconds had a significantly negative and progressive impact on floating pennywort, and a 3 second repeat treatment after 11 days proved fatal. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1131https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1131Tue, 13 Oct 2015 15:46:00 +0100Collected Evidence: Collected Evidence: Floating pennywort: Excavation of banks No evidence was captured on the effects of excavation of banks using a sod-cutter or ‘turf-cutter’ to remove floating pennywort. '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%2F1132https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1132Tue, 13 Oct 2015 15:46:58 +0100Collected Evidence: Collected Evidence: Floating pennywort: Environmental control (e.g. shading, reduced flow, reduction of rooting depth, or dredging) No evidence was captured on the potential for environmental control of floating pennywort using shading, increased flow, reduction of rooting depth to below 1 metre, or dredging. '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%2F1133https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1133Tue, 13 Oct 2015 15:48:34 +0100Collected Evidence: Collected Evidence: Floating pennywort: Public education No evidence was captured on the impact of education programmes on control of floating pennywort. '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%2F1134https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1134Tue, 13 Oct 2015 15:49:48 +0100Collected Evidence: Collected Evidence: Flood cropland when fallow to conserve freshwater marshes One study evaluated the effects, on freshwater marsh vegetation, of flooding cropland during fallow seasons or years. The study was in Brazil. VEGETATION COMMUNITY Community composition (1 study): One replicated, site comparison study in Brazil found that flooding rice fields during their fallow period affected the overall community composition of wetland plants, but that the nature of the effect depended on when fields were surveyed. Overall richness/diversity (1 study): The same study found that flooding rice fields during their fallow period had no significant effect on wetland plant species richness per site and per survey, although fewer species were recorded in the flooded fields over the year of the study. VEGETATION ABUNDANCE   VEGETATION STRUCTURECollected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2954https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2954Thu, 25 Mar 2021 13:44:32 +0000Collected Evidence: Collected Evidence: Flood cropland when fallow to conserve brackish/salt marshesWe found no studies that evaluated the effects, on brackish/salt marsh vegetation, of flooding cropland during fallow seasons or years.   ‘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%2F2955https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2955Thu, 25 Mar 2021 13:54:21 +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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