This study was conducted to determine the secondary production of mangrove under PNAP Area of Brgy. Bagumbayan, Malalag, Davao del Sur. There were two sampling stations established in the area. In each station contains 3 transect lines with an interval of 50m and within the transect line a 10x10m plot was established. Quadrat method was also employed. Result revealed that there were 15 species of secondary productivity found in the area which composes of 613 individuals and was classified and identified according its taxonomic classification. Majority of this species commonly belongs to the Phylum Arthropoda, Molluska, Echinodermata and Chordata.

The PNAP mangrove species were composed of Rhizophora mucronata, Avicennia marina and Sonneratia alba wherein the identified species used mangroves as habitat, nursery and breeding grounds. The result further showed that there was no significant difference between the species diversity and abundance of mangrove secondary productivity in PNAP mangrove area (P<0.05).