Collected Evidence: Collected Evidence: Legally protect areas where climate change impacts are predicted to be less severe  We found no studies that evaluated the effects of legally protecting areas where climate change impacts are predicted to be less severe on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4181https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4181Mon, 28 Oct 2024 14:53:45 +0000Collected Evidence: Collected Evidence: Discourage commercial harvest during periods of elevated temperatures We found no studies that evaluated the effects of discouraging commercial harvest during periods of elevated temperatures on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4182https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4182Mon, 28 Oct 2024 14:55:00 +0000Collected Evidence: Collected Evidence: Plant aquatic vegetation We found no studies that evaluated the effects of planting aquatic vegetation on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4183https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4183Mon, 28 Oct 2024 14:55:21 +0000Collected Evidence: Collected Evidence: Legally protect habitat for eels  We found no studies that evaluated the effects of legally protecting habitat for anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4184https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4184Mon, 28 Oct 2024 14:56:35 +0000Collected Evidence: Collected Evidence: Enforce existing legislation for habitat protection  We found no studies that evaluated the effects of enforcing existing legislation for habitat protection on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4185https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4185Mon, 28 Oct 2024 14:57:26 +0000Collected Evidence: Collected Evidence: Raise riverbed levels We found no studies that evaluated the effects of raising riverbed levels on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4186https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4186Mon, 28 Oct 2024 14:57:35 +0000Collected Evidence: Collected Evidence: Retain or create buffer zones around important habitats  We found no studies that evaluated the effects of retaining or creating buffer zones around important inland habitats on anguillid eel populations.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4187https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4187Mon, 28 Oct 2024 14:58:29 +0000Collected Evidence: Collected Evidence: Create or restore meanders to straightened rivers  One study evaluated the effects of restoring meanders to straightened rivers on anguillid eel populations in inland habitats. The study was in the UK.  COMMUNITY RESPONSE (0 STUDIES)    POPULATION RESPONSE (1 STUDY)  Abundance (1 study): One controlled, before-and-after study in the UK found that after restoring meanders to a section of river, along with removing embankments and creating backwater habitats, the number of European eels decreased, while no change in eel numbers was found in an unrestored site.    BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4188https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4188Mon, 28 Oct 2024 15:01:15 +0000Collected Evidence: Collected Evidence: Create or restore backwater habitats One study evaluated the effects of restoring backwater habitats on anguillid eel populations in inland habitats. The study was in the UK.  COMMUNITY RESPONSE (0 STUDIES)    POPULATION RESPONSE (1 STUDY)  Abundance (1 study): One controlled, before-and-after study in the UK found that the number of European eels decreased after creating backwater habitats in a section of river, along with removing embankments and restoring meanders, while no change in eel numbers was found in an unrestored site.    BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4189https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4189Mon, 28 Oct 2024 15:03:56 +0000Collected Evidence: Collected Evidence: Stabilize riverbanks  One study evaluated the effects of stabilizing riverbanks on anguillid eel populations in inland habitats. The study was in New Zealand. COMMUNITY RESPONSE (0 STUDIES)   POPULATION RESPONSE (1 STUDY) Abundance (1 study): One controlled, before-and-after study in New Zealand found that after stabilizing riverbanks, longfin eel biomass decreased one year later (by almost half) but reached similar levels to before stabilization after 2–3 years.  BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4190https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4190Mon, 28 Oct 2024 15:08:47 +0000Collected Evidence: Collected Evidence: Reduce river channel width We found no studies that evaluated the effects of reducing river channel width on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4191https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4191Mon, 28 Oct 2024 15:11:12 +0000Collected Evidence: Collected Evidence: Create or restore wetlands We found no studies that evaluated the effects of creating or restoring wetlands on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4192https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4192Mon, 28 Oct 2024 15:12:19 +0000Collected Evidence: Collected Evidence: Create or restore step and pool sequences We found no studies that evaluated the effects of creating or restoring step and pool sequences on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4193https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4193Mon, 28 Oct 2024 15:21:07 +0000Collected Evidence: Collected Evidence: Create or restore pool and riffle sequences We found no studies that evaluated the effects of creating or restoring pool and riffle sequences on anguillid eel populations in inland habitats.  ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4194https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4194Mon, 28 Oct 2024 15:22:27 +0000Collected Evidence: Collected Evidence: Reconnect off-channel habitats (e.g. sloughs, wetlands, oxbows)We found no studies that evaluated the effects of reconnecting off-channel habitats (e.g. sloughs, wetlands, oxbows) on anguillid eel populations in inland habitats.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4195https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F4195Mon, 28 Oct 2024 15:24:31 +0000
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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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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