Project Title: Combating Invasive Alien Species in Croatia

Project Start Year:

Status: Active

Species: Biodiversity Conservation

Invasive alien species pose a serious threat to the natural environment, causing negative ecological, economic, and health consequences. Due to human activities, numerous alien species have entered our ecosystem, where they threaten biodiversity and the survival of native species. To date, over 900 invasive plant and animal species have been identified in Croatia, among which particularly problematic species include the red-eared slider turtle and invasive fish species that threaten the preservation of the Plitvice Lakes ecosystem.

Zagreb Zoo has actively engaged in the prevention and control of invasive alien species through two key initiatives: the Acceptance Center for Red-Eared Sliders and the removal of invasive fish species in Plitvice Lakes National Park.

Sanctuary/Center for Red-Eared Sliders (Trachemys scripta)

In June 2023, Zagreb Zoo was officially designated as the Sanctuary/Center for Red-Eared Sliders, an invasive species subject to inspection measures. These turtles often enter our environment as unwanted pets, representing a significant threat to local ecosystems.

The goals and activities of the Center include the adoption of unwanted turtles and the placement of retained individuals in controlled conditions to prevent their spread and reproduction. Additionally, by relocating turtles, we help reduce their numbers in natural areas such as Maksimir Park and the Botanical Garden, implementing strict control and prevention measures.

Through educating citizens about responsible pet ownership and the consequences of releasing alien species into nature, we contribute to preventing the introduction of new individuals into the ecosystem. We are also working to improve the capacities of the Center, including infrastructure for temperature regulation and nesting sites, to ensure adequate conditions for effective management of these turtle populations.

Removal of Invasive Fish Species in Plitvice Lakes National Park

In Plitvice Lakes National Park, as a protected natural reserve, rich biodiversity faces a threat from invasive fish species such as the chub and the redfin perch, which seriously endanger the survival of native fish species, including the Danube salmon and the two-banded bream. To restore the natural ecosystem, systematic activities are being carried out to remove these alien species from the lake and river system. Additionally, efforts are being made to restore the population of native fish, such as the Danube salmon.

The Zagreb City Zoo supports this important project by exchanging knowledge and experiences, as well as providing assistance in the removal of the fish.

You can read more about the project at: https://np-plitvicka-jezera.hr/izlov-alohtonih-vrsta-riba/

Summary:

Zagreb Zoo actively participates in combating invasive alien species through projects such as the Center for Red-Eared Sliders and the removal of invasive fish species in Plitvice Lakes National Park. These initiatives focus on conserving biodiversity and educating the public about the consequences of releasing alien species into nature.