Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Use mowing techniques to reduce chick mortality A review from the UK found a large increase in corncrake Crex crex populations in the UK following a scheme to delay mowing and promote corncrake-friendly mowing techniques. One replicated controlled study from the UK and a review from the UK found lower levels of mortality of corncrakes and Eurasian skylark Alauda arvensis when wildlife-friendly mowing techniques were used, compared to other techniques. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F192https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F192Wed, 27 Jun 2012 17:30:44 +0100Collected Evidence: Collected Evidence: Use mixed stocking We found no evidence on the effects of mixed stocking 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%2F232https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F232Tue, 17 Jul 2012 15:51:52 +0100Collected Evidence: Collected Evidence: Use traditional breeds of livestockA replicated controlled study in four European countries found no differences in bird abundances between areas grazed with traditional or commercial breeds of livestock. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F233https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F233Tue, 17 Jul 2012 15:53:48 +0100Collected Evidence: Collected Evidence: Use netting to exclude fish-eating birds Two replicated studies from Germany and the USA found that netting or closely-spaced string barriers reduced losses of fish or deterred fish-eating birds from fish ponds. A review concluded that excluding birds was an effective way to reduce damage. A series of tests in the Netherlands found that netting or nylon lines over ponds did not prevent birds from landing, but did alter behaviour, whilst a before-and-after study from the USA found that fewer great blue herons Ardea Herodias landed at fish ponds with netting, but that they stayed longer. Two replicated studies from Germany and Israel found that some birds became entangled in netting or closely-spaced string barriers over fish ponds. The Israeli study found that dark, small meshed netting entangled fewer birds than other netting types. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F248https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F248Wed, 18 Jul 2012 12:00:45 +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 +0100