4 Things That The Greatness of Barramundi: Can Live in Both Saltwater and Freshwater
By.
Agung Kurniawan -
06 Dec 2024
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kelolalaut.comBarramundi (Lates calcarifer) is a unique species of fish known for its remarkable ability to live in both freshwater and saltwater environments. This ability is called euryhalinity, meaning the fish can survive in waters with varying salinity levels.
1. Mechanisms of Adaptation to Different Salinities
Barramundi possesses advanced physiological mechanisms that help regulate the balance of water and salt in its body, enabling it to thrive in both freshwater and saltwater environments. This is achieved through the fish's specialized kidneys and gills.
In Saltwater: When barramundi is in seawater, the concentration of salt outside its body is much higher than inside. The fish expels excess water from its body via the kidneys, while maintaining its internal salt balance.
In Freshwater: In freshwater, where the salt concentration outside the body is much lower, barramundi expels excess salt through its gills and absorbs more water to maintain internal balance.
2. Migration Between Freshwater and Saltwater
One of the unique characteristics of barramundi is its migratory behavior between freshwater and saltwater for reproduction purposes.
Rivers and Estuaries: Barramundi is commonly found in rivers or estuaries, where freshwater mixes with seawater. In these habitats, the fish can survive with lower salinity, especially when young, and can live for several years.
Migration to the Sea: When barramundi reaches maturity and is ready to spawn, it migrates to the more saline waters of the ocean. The sea is ideal for spawning, and after the breeding season, the fish return to rivers or estuaries. Saltwater provides optimal conditions for barramundi growth and development once they reach adulthood.
3. Advantages of Euryhaline Adaptation
The ability to thrive in both freshwater and saltwater environments offers significant ecological advantages for barramundi:
Access to More Habitats: Barramundi can search for safer environments with abundant food resources, whether in freshwater or seawater. This flexibility allows them to avoid predators and find optimal conditions for growth and reproduction.
Broader Reproductive Opportunities: By migrating between freshwater and saltwater, barramundi can access a variety of spawning habitats, increasing their chances of successful reproduction.
4. Impact on Aquaculture and Consumption
The unique ability of barramundi to adapt to different salinities also influences its aquaculture practices. In fish farming, barramundi can be raised in both freshwater and saltwater systems that replicate their natural habitats. As a result, barramundi is commonly farmed in freshwater ponds, but it can also be cultivated in coastal ponds or brackish water farms connected to the sea.