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Lack of Saltwater in Laguna Lake Equals Hyacinth Boom
The fisherfolk group Pambansang Lakas ng Kilusang Mamamalakaya ng Pilipinas or Pamalakaya on Sunday blamed the excessive proliferation of water hyacinth in Laguna de Bay to the Napindan Hydraulic Control Structure in Taguig City that prevents the entry of saltwater into the 90,000-hectare brackish lake.

Pamalakaya said saltwater that comes from Manila Bay via the Pasig River is essential to Laguna de Bay because it serves as nutrients to maintain the lake’s ecological balance, and brackish water by nature is a combination of fresh and saltwater.

“Since the construction of the Napindan, various pests thrive in the lake, including water hyacinths, snake turtle, knife fish, and janitor fish. All these affect the livelihood of small fisherfolk because predator species such as knife fish and snake turtle prey on small fish preventing them to grow; while the water hyacinths obstruct the movement of fishing boats,” Fernando Hicap, Pamalakaya chairperson, said in a statement. Bill Casas.




 
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Lock and Dam Changes Aimed at Stopping Invasive Carp - Bighead, silver and other invasive carp have been making their way upstream since escaping into the Mississippi River in the 1970s. These large fish are voracious eaters that compete with native species and pose a threat to rivers and lakes. While no breeding populations have been detected in Minnesota waters, individual fish have been caught in the Mississippi near the Twin Cities, the St. Croix River and the Minnesota River.


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