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Corporate Social Resposibility > Environmental Stewardship > Semirara Marine Hatchery Laboratory

Semirara Marine Hatchery Laboratory





The Semirara Marine Hatchery and Laboratory was created in 2010 to help propagate an endangered giant clam species, the Tridacna gigas. It is the largest living bivalve mollusk, which no longer exists in many areas where it once was plentiful—a possible result of overexploitation as a source of livelihood and food, or sold to the aquarium trade. The International Union for Conservation of Natures (IUCN) has included the clam in its list of vulnerable species.


The Marine Hatchery and Laboratory was also established to help develop technology to aid the livelihood of the communities’ fisherfolk to increase fish yield in areas outside the sanctuary and around Semirara Island, protect and manage the island’s vibrant coastal ecosystem, restore and rehabilitate depleted or damaged areas.




Seeding of Giant Clams in Calaca

On September 29, 2016, 50 giant clams from Semirara Island were reseeded on the shoreline of the SEM-Calaca Power Corporation (SCPC) Plant Complex.


With the propagation of giant clams in the area, SCPC aims to promote a more robust marine environment for the plant's nearby residents. The giant clams play host to algae which serve as highly-nutritious food sources for various fish species. The clams and algae also have a symbiotic relationship in which the clams provide a suitable environment for algae to grow, while they benefit from the algae's by-products from photosynthesis. The company had earmarked Php2 million for this project.


Pearl Culture


The Semirara Marine Hatchery and Laboratory is now also conducting experiments in pearl culture. On April 23, 2016, they harvested 150 pieces of pearl oyster, Ptera penguin, which was implanted with half-round nucleus to Half/Mabe/Blister pearl.


Reef Rehabilitation


Reef rehabilitation is another project that the Marine Hatchery has undertaken by transplanting coral fragments and seagrass. So far, three (3) batches of coral fragments were transplanted successfully by the staff. From a total 722 coral fragments, 135 are stocked in the raceway. There were also 587 that were transferred to Tabunan Cove, increasing its total to 1,196 pieces of transplanted coral fragments.


Two (2) species of seagrass were also successfully transplanted: The Enhalus acoroides and Thalassia hempricii, both are very common seagrasses found in Semirara. Twelve (12) pieces of the former were planted in sand-filled sacks, while the latter were planted in sand-filled containers.