This document summarizes a study on frog species in Dinagat Islands and areas of Agusan del Norte in the Philippines. A total of 219 frog individuals from 10 species across 5 families were found via opportunistic sampling of creeks, swamps, and streams. Rana signata was the most abundant species, accounting for 44.29% of frogs. Rana everetti, an endemic species, comprised 0.91% of samples. Libjo, Dinagat Island had 6 species and 50 individuals, while Tubay, Agusan del Norte had 8 species and 70 individuals, and Jabonga, Agusan del Norte had 8 species and 99 individuals. Libjo and T

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ABSTRACT
LEA MAE L. BERENDEZ, FROG SPECIES ASSESSMENT IN DINAGAT
ISLANDS AND AREAS IN AGUSAN DEL NORTE, PHILIPPINES Mindanao
State University, Fatima, General Santos City, March 2014.
Adviser: Jaime A. Namocatcat, Ph.D.
Species composition, relative abundance and diversity of frogs were
assessed via Opportunistic and Cruising Sampling Method on creeks, swamps
and streams of Libjo, Dinagat Islands and areas in Agusan del Norte (specifically,
Tubay and Jabonga), Philippines. Frog survey in sampling areas revealed a total
population of 219 frog individuals resolved into 10 species, belonging to 5
Families namely Bufonidae, Megophryidae, Dicroglossidae, Rhacophoridae and
Ranidae (dominated by Ranidae). Rana signata was the most abundant frog
species found which accounts for 44.29% of the entire frog population gathered.
Rana everetti, one of the uncommon and endemic species, was also present that
comprise only 0.91% of the samples found. In Libjo, Dinagat Island, 50 frog
individuals were found with 6 species, Tubay, Agusan del Norte has 70
individuals and 8 species found and in Jabonga, Agusan del Norte , 99 frog
individuals were found with also 8 species identified. SID scores shows that
Libjo, Dinagat Island and Tubay, Agusan del Norte has the most diverse frog
species composition with 0.75 and 0.74, respectively, while Jabonga, Agusan del
Norte has 0.65 SID score. Results showed that human interventions greatly
affects diversity of frogs, thus more diverse areas depicts less intervention.
Results shows that further study must be carried out to identify the pattern of
variation in species diversity of frogs in study areas. The study sites were places
that houses a rich population of frog species but these begins to deteriorate due
to some species threatened in their habitats caused by human disturbance and
lack of conservation pursuit on these areas. Thus, conservation procedures
must be done to ensure the prevention of natural habitat loss in Libjo, Dinagat
Islands and areas in Agusan del Norte, Philippines.

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