A report on invasive alien species highlights the adverse impact of water hyacinth (Pontederia crassipes) on the tilapia fish population in Lake Victoria. Tilapia, a widely traded food fish, faces challenges due to the proliferation of this invasive aquatic plant. Water hyacinth, introduced to India during British colonial rule as an ornamental plant, has become one of the most invasive weeds worldwide, causing economic and ecological harm. Lake Victoria, the world’s second-largest freshwater lake, spans East Africa, serving as a source for the White Nile River. This issue underscores the ecological challenges posed by invasive species in vital ecosystems.
Facts/Terms for UPSC Prelims
- Invasive Alien Species: Invasive alien species are non-native organisms introduced to a new environment, where they proliferate rapidly and disrupt local ecosystems, often causing harm to native species and habitats.
- Tilapia Fish: Tilapia refers to a group of freshwater fish species belonging to the family Cichlidae. They are known for their quick growth and have gained popularity in aquaculture and international trade.
- Aquatic Chicken: The term “aquatic chicken” is used by fishery experts to describe tilapia due to its rapid growth and ease of cultivation, making it a valuable food fish.
- White Nile River: The White Nile is one of the two main tributaries of the Nile River, flowing northward from Lake Victoria and joining the Blue Nile in Sudan to form the Nile River.
- Blue Nile: The Blue Nile is another major tributary of the Nile River, originating from Lake Tana in Ethiopia. It joins the White Nile in Sudan to create the Nile River.
