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Hanging trees hanging towards the Danube river on a sunny day.

Protecting Threatened Fish Along the Lower Danube in Romania and Bulgaria

A cross-border strategy to tackle poaching, overfishing, and protect key habitats for sturgeons and shads.

Danube river hiding behind Trees and bushes.
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Project Summary

This demo site aims to strengthen protection of five threatened migratory fish species, particularly sturgeons and Pontic shad, by working with fishing communities, enforcement bodies, and decision makers in Romania and Bulgaria. The site focuses on coordinated bans, critical habitat protection, and capacity building to reduce poaching and overfishing while supporting fishers’ livelihoods.

Trees and grass in front of calm Danube river and swamp in the back.
Calm Danube river in front of a forest.
Fish in very shallow, brown water.
Hanging trees hanging towards the Danube river on a sunny day.

Facts & Numbers

Location

Common Danube section (RO/BG), including the Danube Delta

Target Species

Pontic shad and 4 sturgeon species

Key Focus

Conservation of endangered fish species — particularly sturgeons and Pontic shad in the Romanian - Bulgarian Danube region

Demosite Details

What makes this river system or site unique?

The site has the most preserved part of the Danube, the longest river in the European Union, with intact longitudinal connectivity hosting the most important habitats for sturgeon and Pontic shad. It covers the common BG-RO section of Danube River, Romanian Danube (length of approx. 839 km) and Danube Delta (approx. 6,750 km2).

What has changed in this system over time?

Human impact on this part of the Danube River comes from construction of migration barriers upstream, draining floodplains, building dikes and dredging. Results are – disrupting fish migration and fish breeding habitats, limiting lateral connectivity and losing wetland related biodiversity.

What is the main challenge for migratory fish at this site?

Along with poaching, migration barriers are the main challenge for migratory fish species.

Activities and Objectives

Main Activities

Effective practices for monitoring and research of habitats of sturgeon and Pontic  shad will be tested and implemented to assess the effectiveness of measures targeting migratory fish in the Danube basin. This includes monitoring of young of the year (YoY) sturgeons, survey of Pontic shad reproduction, and Pontic shad habitat surveys.

Goal of these Activities

The goal of the above activities is to contribute to testing and demonstrating solutions for the protection of critical habitats and migration periods of Danube  shad and sturgeon by harmonizing the fishing ban between Bulgaria and Romania, extending the fishing ban on sturgeon in Bulgaria and declaring new protected areas or including habitats  of sturgeon and Danube shad in existing protected areas or Natura 2000 sites.

Another goal is to plan additional measures and share knowledge with associated regions.

Type of Solutions or Measures

  • develop recommendations for migratory species management for fishing and conservation authorities;

  • protection of critical habitats for Pontic shad and sturgeon;

  • reduce fishing pressure on Pontic shad, as well as poaching and by-catches of sturgeon.

What we aim to achieve

How can the knowledge from this site be used in other regions?

Knowledge on various levels can be used by other regions. Information on reproduction of target species gathered by the project can be directly used by other regions, which share the same species.  Knowledge in terms of methodology and logic of actions can also be used directly – applying links between research, work with stakeholders, and proposing and applying conservation activities. 

What is the main goal of this site within DANUBElifelines?

Identify spawning habitats and harmonization of close seasons between RO-BG.

One sentence that best describes your site or why it matters

The site can be described as the Lower Danube Green Corridor.

Project DANUBElifelines: Safeguarding Migratory Fish and their Habitats in the Danube River Basin and beyond has received funding from the European Union’s Horizon Europe research and innovation programme under grant agreement No. 101213836.
Part of the EU Missions: Restore our oceans & waters
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Danube river hiding behind Trees and bushes