ELBA BIOFLUX Species richness and abundance of cave-dwelling crickets on Siargao Island, Surigao Del Norte, Philippines

Irhene Novises, Olga Nuñeza
2014 unpublished
Cavernicolous crickets were surveyed in selected caves on Siargao Island, Surigao del Norte, Philippines to determine species richness, evenness, distribution, and abundance. Sampling was carried out in 10 caves using hand searching, direct counting, pitfall traps and sweep nets. Three species of crickets with 644 individuals were recorded in eight out of the 10 caves sampled. Ceuthophilus sp. which was observed on cave holes, bedrock ceilings, and on floors with guano deposits was found to be
more » ... he most abundant. Pteronemobius sp., the second most abundant (42.92%) was observed on cave walls and crevices in the twilight zone. Only one individual of Gryllotalpa sp. was present in only one cave site. Results indicate that larger caves with more guano deposits, high relative humidity and low temperature have more number of crickets.