Collected Evidence: Collected Evidence: Deploy patrol boats We found no studies that evaluated the effects of deploying patrol boats on marine fish 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%2F2738https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2738Tue, 02 Feb 2021 15:08:05 +0000Collected Evidence: Collected Evidence: Organise vessel monitoring systems We found no studies that evaluated the effects of organising monitoring systems on marine fish 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%2F2739https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2739Tue, 02 Feb 2021 15:11:19 +0000Collected Evidence: Collected Evidence: Use human observers onboard fishing vessels to monitor catches and discards We found no studies that evaluated the effects of using human observers onboard fishing vessels to monitor catches and discards on marine fish 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%2F2740https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2740Tue, 02 Feb 2021 15:15:25 +0000Collected Evidence: Collected Evidence: Use citizen surveillance to report illegal fishing We found no studies that evaluated the effects of using citizen surveillance to report illegal fishing on marine fish 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%2F2741https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2741Tue, 02 Feb 2021 15:37:26 +0000Collected Evidence: Collected Evidence: Enforce port controls We found no studies that evaluated the effects of enforcing port controls on marine fish 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%2F2766https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2766Wed, 03 Feb 2021 10:03:11 +0000Collected Evidence: Collected Evidence: Use onboard CCTV for monitoring catches and discards We found no studies that evaluated the effects of using onboard CCTV monitoring on marine fish 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%2F2767https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2767Wed, 03 Feb 2021 10:05:44 +0000Collected Evidence: Collected Evidence: Use flags to signal the legal nationality of a fishing vessel We found no studies that evaluated the effects of using a flag to identify the legal nationality of a fishing vessel on marine fish 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%2F2768https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2768Wed, 03 Feb 2021 10:10:41 +0000Collected Evidence: Collected Evidence: Eliminate flags of convenience We found no studies that evaluated the effects of eliminating flags of convenience on marine fish 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%2F2769https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2769Wed, 03 Feb 2021 10:27:16 +0000Collected Evidence: Collected Evidence: Establish open and transparent reporting of fishing effort data We found no studies that evaluated the effects of establishing open and transparent fishing effort data on marine fish 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%2F2770https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2770Wed, 03 Feb 2021 10:37:50 +0000Collected Evidence: Collected Evidence: Use methods to trace the source of catch We found no studies that evaluated the effects of using methods to trace the sources of catches on marine fish 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%2F2771https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2771Wed, 03 Feb 2021 11:18:06 +0000Collected Evidence: Collected Evidence: Issue high fines and penalties for non-compliance with fisheries regulations We found no studies that evaluated the effects of issuing high fines and penalties for non-compliance with fisheries regulations on marine fish 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%2F2772https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2772Wed, 03 Feb 2021 11:19:38 +0000Collected Evidence: Collected Evidence: License fish buyers We found no studies that evaluated the effects of licensing fish buyers on marine fish 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%2F2773https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2773Wed, 03 Feb 2021 11:25:34 +0000Collected Evidence: Collected Evidence: Enforce gear and vessel restrictions (e.g. cap engine power, ban gears) We found no studies that evaluated the effects of enforcing gear and vessel restrictions (e.g. cap engine power, ban gears) on marine fish 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%2F3830https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3830Mon, 30 May 2022 08:47:04 +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.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

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.

Read the latest volume: Volume 21

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust
For a full list of, and information about, our champions:
All Evidence Champions
About our champions, why and how to become one:
Become an Evidence Champion

This website uses Cookies

We use limited Cookies to run the site and to analyse our traffic (none for site vendors). By using this site, you will be providing your consent to our use of Cookies.

Accept & continue