Collected Evidence: Collected Evidence: Provide supplementary food to increase parental presence and so reduce brood parasitism We found no evidence on providing supplementary food to increase parental presence and so reduce boord parasitims 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%2Fconservationevidencejournal.com%2Factions%2F445https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F445Thu, 23 Aug 2012 16:04:16 +0100Collected Evidence: Collected Evidence: Provide supplementary foodA replicated, controlled study from Europe found that overall, gardens with supplementary food did not contain more species than those without. However, there was some evidence that gardens with supplementary food in five countries did contain more species than unfed ones, when countries were analysed separately.   For specific interventions see: provide supplementary foodCollected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F521https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F521Sat, 08 Sep 2012 13:18:10 +0100Collected Evidence: Collected Evidence: Provide supplementary food for waders to increase reproductive successA small controlled trial from the Netherlands found that Eurasian oystercatchers Haematopus ostralegus did not produce larger replacement eggs if provided with supplementary food, and their eggs were, in fact smaller than the first clutch, whereas control females laid larger replacement eggs.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F529https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F529Sun, 09 Sep 2012 17:48:48 +0100Collected Evidence: Collected Evidence: Provide supplementary food for ibises to increase reproductive successA study from China found that breeding success of crested ibis Nipponia nippon was correlated with the amount of supplementary food provided, although no comparison was made with unfed nests.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F530https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F530Sun, 09 Sep 2012 17:51:49 +0100Collected Evidence: Collected Evidence: Provide supplementary food for kingfishers to increase reproductive successA controlled study in the USA found that belted kingfisher Ceryle alcyon supplied with food had heavier nestlings and were more likely to renest. There was mixed evidence for the effect of feeding on laying date.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F534https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F534Sun, 09 Sep 2012 19:30:18 +0100Collected Evidence: Collected Evidence: Provide supplementary food for pigeons to increase reproductive successA replicated cross-over study in the UK found no differences in reproductive parameters of European turtle doves Streptopelia turtur between years when food was supplied and those when it was not.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F535https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F535Sun, 09 Sep 2012 19:40:03 +0100Collected Evidence: Collected Evidence: Provide supplementary food to allow the rescue of a second chickA small controlled study in Spain found that second chicks from lammergeier Gypaetus barbatus nests survived longer if nests were provided with food, allowing one chick to be rescued.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F541https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F541Sat, 15 Sep 2012 20:58:36 +0100Collected Evidence: Collected Evidence: Provide supplementary food for waders to increase adult survivalA study in Northern Ireland found that waders fed on millet seed when provided, but were dominated by mallards Anas platyrhynchos when larger seeds were provided.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F543https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F543Sun, 16 Sep 2012 08:50:12 +0100Collected Evidence: Collected Evidence: Provide supplementary food for gulls, terns and skuas to increase adult survivalA randomised, replicated and controlled study in the Antarctic found that female south polar skuas Catharacta maccormicki that were fed lost more weight whilst feeding two chicks than unfed birds. There was no difference for birds with single chicks, or male birds.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F548https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F548Sun, 16 Sep 2012 09:21:14 +0100Collected Evidence: Collected Evidence: Use captive breeding to increase or maintain populations of pigeonsA review of a captive-breeding programme on Mauritius and in the UK found that 42 pink pigeons, Nesoenas mayeri, were successfully bred in captivity.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F597https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F597Sat, 13 Oct 2012 15:21:33 +0100Collected Evidence: Collected Evidence: Artificially incubate and hand-rear vultures in captivityA study in Peru found that hand-reared Andean condors Vultur gryphus had similar survival to parent-reared birds after release into the wild.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F613https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F613Sun, 14 Oct 2012 12:01:57 +0100Collected Evidence: Collected Evidence: Release captive-bred individuals into the wild to restore or augment wild populations of pigeonsA single review of a captive-release programme in Mauritius found that that released pink pigeons Nesoenas mayeri had a first year survival of 36%.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F628https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F628Sun, 14 Oct 2012 22:54:33 +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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