IAS 1: Development of management plans for invasive alien species small Indian mongoose, signal crayfish and pond slider

Project name: Development of manual, action plans and management plans for invasive alien species – IAS; Group 1: Development of management plans for invasive alien species

Client: Ministry of Economy and Sustainable Development
Period: 08/2019 – 05/2021
Location: Croatia


As part of the project, three management plans were developed for three invasive alien species on the Union list (Regulation (EU) No. 1143/2014, Commission Implementing Regulation (EU) 2016/1141) which are widespread in the Republic of Croatia:

  • Small Indian Mongoose Management Plan (Herpestes javanicus),
  • Signal Crayfish Management Plan (Pacifastacus leniusculus)
  • Pond Slider Management Plan (Trachemys scripta).

The plans were developed in 4 phases:

In the first phase of the project, together with the development of the work plan, an assessment of the situation was made based on the existing literature, analysis of strategic and legislative frameworks related to IAS issues at the international, regional and national level, and review of the structure and capacity of IAS management systems in Croatia, as well as review of existing IAS databases.

In the second phase, stakeholder analysis and analysis of existing planning documents for control and management of three IAS were made. The analyses included a review of professional and scientific literature, examples of good practice, analysis of IAS databases and reports of relevant bodies of other countries. A total of 3 cycles of 18 facilitated workshops per cycle were organized and held within the project (56 workshops + an additional workshop on mongooses = a total of 57) for stakeholders. Workshops were organized throughout Croatia. An accompanying report was made for each workshop and workshop cycle. In the second phase of the project, the 1st cycle of workshops was carried out and, based on consultations with stakeholders in the workshops, a draft of the content and structure for each management plan was prepared.

In the third phase of the project, a proposal of general and specific goals, measures and activities for the management of the IAS was made, which was based on the analysis of examples of good practice in the management of the IAS at the national, regional and international level. As part of this phase, the 2nd cycle of 18 facilitated workshops was organized for stakeholders, within which a vision was developed, and through the discussion, the goals, measures and activities for the management of IAS were harmonized. Based on the results of the workshops, the draft management plans were supplemented.

In the fourth phase of the project, the 3rd cycle of workshops was carried out where the general consensus of stakeholders was reached and the final draft of the management and control measures was developed. Each of the management plans contains: analysis of the legislative framework at the international, regional and national level, description of the management plan development process which includes the process of stakeholder involvement in the management plan development, detailed data on distribution, biology, ecology of IAS, input and distribution pathway analysis missing data on the species (GAP analysis), mechanisms and capacities of mongoose management and control, objectives and activities/methods/eradication and regulation of population density, and prevention of spread, as well as cost-benefit analysis and possible ecosystem restoration measures.

Management plans for all 3 species cover the entire territory of the Republic of Croatia (including the protected areas and areas of the Natura 2000 ecological network).

Oikon d.o.o.
Oikon d.o.o.