Engage policymakers to make policy changes beneficial to marine and freshwater mammals

How is the evidence assessed?
  • Effectiveness
  • Certainty
  • Harms

Study locations

Key messages

  • One study evaluated the effects of engaging policymakers to make changes beneficial to marine and freshwater mammals. The study was in the Catazajá wetlands (Mexico).




  • Change in human behaviour (1 study): One study in the Catazajá wetlands reported that engaging policymakers resulted in the designation of a protected area for West Indian manatees.

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A study in 2001–2008 in the Catazajá wetlands, northeast Chiapas, Mexico (Rodas-Trejo et al. 2008) reported that engaging policymakers in West Indian manatee Trichechus manatus manatus conservation resulted in the designation of a protected area. Policymakers were engaged in manatee conservation over a seven-year period in 2001–2007. In November 2006, wetlands (41,000 ha) used by West Indian manatees were designated as a protected area by local and regional governments. In February 2008, the area was designated as an internationally important site. In 2001–2007, local government officials, fishers and students were informed about the value of conserving manatees and their habitats. A total of 4,540 participants attended 23 workshops and 80 public talks. Publications on manatee conservation (four posters, five videos, two leaflets, one booklet) were distributed to community government officials and local schools. Local community members assisted researchers in recording manatee sightings and rescuing stranded manatees.

    Study and other actions tested
Please cite as:

Berthinussen, A., Smith, R.K. and Sutherland, W.J. (2021) Marine and Freshwater Mammal Conservation: Global Evidence for the Effects of Interventions. Conservation Evidence Series Synopses. University of Cambridge, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Marine and Freshwater Mammal Conservation

This Action forms part of the Action Synopsis:

Marine and Freshwater Mammal Conservation
Marine and Freshwater Mammal Conservation

Marine and Freshwater Mammal Conservation - Published 2021

Marine and Freshwater Mammal Synopsis

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