Collected Evidence: Collected Evidence: Provide refuges for fish within pondsA controlled cross-over trial in the UK found that great cormorant Phalacrocorax carbo foraging success was lower in a pond with artificial refuges, compared to a control pond.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F253https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F253Wed, 18 Jul 2012 12:49:06 +0100Collected Evidence: Collected Evidence: Use in-water devices to reduce fish loss from ponds A before-and-after study from the USA found a 95% reduction in the number of double-crested cormorant Phalacrocorax auritus at two ponds in a fish farm following the installation of underwater ropes. A replicated study at a fish farm in Australia found that hanging gill nets in ponds did not decrease the number of cormorants swimming in ponds.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F254https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F254Wed, 18 Jul 2012 12:54:38 +0100Collected Evidence: Collected Evidence: Spray water to deter birds from pondsA replicated study from Sweden found that a rotating water spray deterred birds from fish ponds, but that birds often became used to the spray.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F255https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F255Wed, 18 Jul 2012 12:57:49 +0100Collected Evidence: Collected Evidence: Deter birds from landing on shellfish culture gear using spikes on oyster cagesA replicated and controlled study from Canada found that significantly fewer birds landed on oyster cages with spikes attached, compared to control cages.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F256https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F256Wed, 18 Jul 2012 13:00:33 +0100Collected Evidence: Collected Evidence: Deter birds from landing on shellfish culture gear by suspending oyster bags under waterA replicated and controlled study from Canada found that significantly fewer birds roosted on oyster bags suspended 6 cm below the water, compared with non-submerged bags. Birds roosted on bags suspended 3 cm below the water as frequently as control bags.  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F257https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F257Wed, 18 Jul 2012 13:31:25 +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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The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

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