In terms of as sourcing of eggs and fish feed, duck ranks second in Philippines. Total duck population reached 10.06 million birds as of July 1, 2013. In 2013, annual volume of duck output was 34.46 metric tons. Egg production increased form 39.7 metric tons in 2012 to 41.07 metric tons in 2013. 3.3 Aquaculture Production Sector.