Agriculture Beyond the Park
Udawalawe National Park, is often celebrated for its diverse flora and fauna. However, beyond the park's...
Fish and Shrimp Species in Udawalawe Reservoir
While the initial stocking efforts focused on the following Carp species namely:
Indian Carp
Rohu carp
Labeo calbasu (also know as Kalaba)
As well as Tilapia
Udawalawe’s waters now support a more diverse fish population. The reservoir has become a home to various native and introduced species, each playing a crucial role in the ecosystem. For instance, the inclusion of predatory fish like the Mahseer has helped to control the population of smaller fish, maintaining a balanced aquatic environment.
Shrimp, often overlooked, are equally vital to the ecosystem. The dominant species in Udawalawe is the freshwater prawn, Macrobrachium rosenbergii. These crustaceans are not only a food source for fish but also play a crucial role in nutrient cycling. Their burrowing activities help to oxygenate the sediment, improving water quality.
Challenges in Stocking the Reservoir
Stocking Udawalawe’s reservoir has been a complex endeavor, fraught with challenges. One of the primary hurdles is ensuring the survival of the introduced fish and shrimp. Predation by birds, reptiles, and larger fish can significantly impact the success of stocking programs. To mitigate this, authorities have experimented with different stocking sizes and release locations.
Another challenge is maintaining water quality. The reservoir’s water levels fluctuate throughout the year, affecting oxygen levels and temperature. These changes can impact the survival rates of fish and shrimp. Continuous monitoring of water parameters is essential to ensure optimal conditions for aquatic life.
Furthermore, the introduction of non-native species can disrupt the delicate balance of the ecosystem. Careful consideration must be given to the potential impacts of any new species before they are introduced. Invasive species can outcompete native ones, leading to a decline in biodiversity.
Despite these challenges, the efforts to stock Udawalawe’s reservoir have yielded remarkable results. The reservoir has transformed from a lifeless body of water into a thriving aquatic ecosystem, supporting a diverse range of fish and shrimp species. This success story is a testament to the dedication and expertise of those involved in the management of the park.
Although not yet possible we hope in the near future there will be sports fishing on Udawalawe Lake which will bring in additional revenue for the local community.
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