Collected Evidence: Collected Evidence: Procambarus crayfish control: Trapping and removal One controlled, replicated study in Italy found that baiting traps with food (tinned meat) trapped the most red swamp crayfish compared to the use of male and female pheromones or the control (no bait). Over half of all crayfish caught were found in traps baited with food.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1029https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1029Fri, 03 Jul 2015 15:14:42 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Sterilization of males One replicated laboratory study in Italy found that exposing male red swamp crayfish to X-rays reduced the number of offspring they produced by 43%.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1032https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1032Fri, 03 Jul 2015 15:16:20 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Add chemicals to the water One replicated, controlled study in Italy found that red swamp crayfish could be killed using the natural pyrethrum Pyblast at a concentration of 0.05 mg/l, but that application to drained crayfish burrows was not effective.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1036https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1036Fri, 03 Jul 2015 15:17:25 +0100Collected Evidence: Collected Evidence: Procambarus crayfish control: Create barriers A before-and-after study conducted between 2007 and 2010 in Spain found that the use of concrete dams across a stream, specifically designed with features to prevent red swamp crayfish from crawling over them, were effective at containing spread of the population upstream.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1037https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1037Fri, 03 Jul 2015 15:18:00 +0100Collected Evidence: Collected Evidence: American bullfrog control: Biological control using native predators One replicated, controlled study conducted in Belgium found the introduction of the northern pike led to a strong decline in bullfrog tadpole numbers.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1039https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1039Fri, 03 Jul 2015 15:18:58 +0100Collected Evidence: Collected Evidence: American bullfrog control: Application of a biocide One replicated, controlled study in the USA found a number of chemicals killed American bullfrogs, including caffeine (10% solution), chloroxylenol (5% solution), and a combined treatment of Permethrin (4.6% solution) and Rotenone (1% solution).  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1048https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1048Fri, 03 Jul 2015 15:21:26 +0100Collected Evidence: Collected Evidence: Brown and black bullheads: Netting A replicated study from 1999-2000 in shallow interconnected ponds in a nature reserve in Belgium1 found that double fyke nets could be used to significantly reduce the population of brown bullhead measuring over 8cm  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1051https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1051Wed, 07 Oct 2015 10:51:53 +0100Collected Evidence: Collected Evidence: Red-eared terrapin: Application of a biocide One replicated, controlled laboratory study in the USA, found that application of glyphosate to the eggs of red-eared terrapins reduced hatching success to 73%, but only at the highest experimental concentration of glyphosate and a surface active agent.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1059https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1059Tue, 13 Oct 2015 12:05:40 +0100Collected Evidence: Collected Evidence: Ponto-Caspian gobies: Changing salinity A replicated, controlled laboratory study in Canada found 100% mortality of round gobies within 48 hours of exposure to water of 30% salinity.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1072https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1072Tue, 13 Oct 2015 12:27:09 +0100Collected Evidence: Collected Evidence: Ponto-Caspian gobies: Use of barriers to prevent migration A controlled, replicated field study in the USA, found that an electrical barrier prevented movement of round gobies across it, and that increasing electrical pulse duration and voltage increased effectiveness of the barrier.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1074https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1074Tue, 13 Oct 2015 12:31:01 +0100Collected Evidence: Collected Evidence: Ponto-Caspian gammarids: Exposure to parasites A replicated, laboratory study in Canada found that an introduced parasitic mould reduced populations of an invasive shrimp.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1089https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1089Tue, 13 Oct 2015 13:30:53 +0100Collected Evidence: Collected Evidence: Ponto-Caspian gammarids: Change water temperature A controlled laboratory study from the UK1 found that heating water to >36°C killed all shrimps after 15 minutes exposure and at >43°C all shrimps died immediately.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1092https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1092Tue, 13 Oct 2015 13:38:26 +0100Collected Evidence: Collected Evidence: Control rodents One controlled study in New Zealand1 found that rodent control decreased native plant species richness and did not affect total plant species richness.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1232https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1232Mon, 23 May 2016 11:19:19 +0100Collected Evidence: Collected Evidence: Use selective thinning after restoration planting One replicated, paired sites study in Canada found that selective thinning after restoration planting conifers increased the abundance of herbaceous species and decreased the abundance of trees.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1238https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1238Fri, 03 Jun 2016 09:16:54 +0100Collected Evidence: Collected Evidence: Cover the ground with plastic mats after restoration planting One replicated study in Canada found that covering the ground with plastic mats after restoration planting decreased the cover of herbecous plants and grasses.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1239https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1239Fri, 03 Jun 2016 09:35:17 +0100Collected Evidence: Collected Evidence: Cover the ground using techniques other than plastic mats after restoration planting One replicated, randomized, controlled study in the USA found that covering the ground with mulch after planting increased total plant cover.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1240https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1240Fri, 03 Jun 2016 09:38:37 +0100Collected Evidence: Collected Evidence: Apply herbicides after restoration planting One replicated, randomized, controlled study in the USA found that controlling vegetation using herbicides after restoration planting decreased plant species richness and diversity.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1241https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1241Fri, 03 Jun 2016 09:52:52 +0100Collected Evidence: Collected Evidence: Water plants to preserve dry tropical forest species One replicated, controlled study in Hawaii found that watering plants increased the abundance and biomass of forest plants.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1242https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1242Fri, 03 Jun 2016 09:55:53 +0100Collected Evidence: Collected Evidence: Sow tree seeds One replicated, randomized, controlled, before-and-after study in Brazil found that sowing tree seeds increased the density and species richness of new trees.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1244https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1244Fri, 03 Jun 2016 11:02:33 +0100Collected Evidence: Collected Evidence: Build bird-perches to enhance natural seed dispersal One replicated, randomized, controlled study in Brazil found that building perches for birds increased species richness and abundance of new tree seedlings.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1245https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1245Fri, 03 Jun 2016 11:06:15 +0100Collected Evidence: Collected Evidence: Add lime to the soil to increase fertility One replicated, randomized controlled study in the USA found that adding lime increased vegetation cover.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1249https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1249Fri, 03 Jun 2016 12:48:10 +0100Collected Evidence: Collected Evidence: Cover the ground with straw after tree planting One replicated, randomized, controlled study in the Czech Republic found that covering the ground with straw, but not bark or fleece, increased the growth rate of planted trees and shrubs.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1266https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1266Fri, 10 Jun 2016 08:44:29 +0100Collected Evidence: Collected Evidence: Use weed mats to protect planted trees One replicated, controlled study in Hong Kong found no effect of using weed mats on thick-leaved oak seedling height.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1267https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1267Fri, 10 Jun 2016 08:53:49 +0100Collected Evidence: Collected Evidence: Use shading for planted trees One replicated, controlled study in Panama found that shading increased the survival rate of planted native tree seedlings.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1269https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1269Fri, 10 Jun 2016 09:19:59 +0100Collected Evidence: Collected Evidence: Use herbicides to remove invasive plant species One replicated, randomized, controlled study in the USA found no effect of invasive plant control using herbicide on the total native plant species richness.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1314https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1314Fri, 23 Sep 2016 14:49:03 +0100
What Works 2021 cover

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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