Meetings of the
Biodiversity & Ecology Journal Club
Department of Biological Sciences, The National University of Singapore

"The First NUS-USC Expedition to
Cebu, Bohol, in central Philippines"


"The Cave shrimps of Philippines"

Benito C. Tan & Peter K. L. Ng
Cryptogram Laboratory; Systematics & Ecology Laboratory


Cai Yixiong
Systematics & Ecology Laboratory
(The Cave shrimps of the Philippines)

Friday, 2nd March 2001
1pm - 2pm

Department of Biological Sciences Conference Room,
Block S3, Level 5, Science Drive 4, Faculty of Science,
The National University of Singapore





"The First NUS-USC Expedition to Cebu, Bohol, in central Philippines"
Abstract. - The natural history of Bohol and Cebu, well known for the endemic Philippine tarsiers, is both interesting and intriquing. Having emerged from the sea during the mid Tertiary, both islands are oceanic in origin and made up of extensive karst formation which support many unusual and bizarre stream and cave invertebrates. Near Bohol Island are deep sea trenches that have not been surveyed for the crustacean fauna and fishes. A joint expedition was organized between the Biology Department of University of San Carlos and the RMBR of DBS-NUS to survey, albeit preliminarily, the fresh water stream, cave and deep sea fauna of central Philippine Sea from Dec 11-20, 2000. Several new species of fresh water and cave crabs were collected. Discussion of the evolution and biogeography of the two islands' fauna will be made in the light of new findings that emerged from this expedition. Additional notes on the local conservation program and public education will also be presented.


"The Cave shrimps of the Philippines"
Abstract - The diversity of cavernicolous shrimps of the Philippines is reappraised on the basis of recent as well as old collections. This study shows that the subterranean shrimp fauna of the Philippines is represented only by the family Atyidae, with 11 species in 5 genera--Antecaridina, Jolivetya, Edoneus, Halocaridinides, and Caridina, belonging to three subfamilies--Typhlatyinae, Caridellinae and Atyinae. Nine stygobiont species and 2 stygoxene species are recorded. Of these, five are new to science and four are recorded from the Philippines for the first time. Results of morphological comparisons suggest that the subterranean shrimps of the Philippines might have multiple origins. Three hypothetical origin pathways are proposed. Morphological illustrations are provided. The adaptations of these shrimps to these subterranean habitats and their possible speciation are discussed.

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