First report on deep-water Caridina spp from Lake Poso, Sulawesi

¹ Animal Bioscience Study Program, IPB University, Kampus IPB Dramaga, 16680 Bogor, Indonesia
² Agrotechnology Study Program, PSDKU Tojo Una-Una, Tadulako University, 94683 Ampana, Tojo Una-Una, Indonesia
³ Perkumpulan Konservasi Membumi, Bogor Utara, 16153 Bogor, Indonesia
⁴ Research Center for Biosystematics and Evolution, Research Center and Innovation Agency (BRIN), 16911 Cibinong, Bogor, Indonesia
⁵ Department of Biology, Tadulako University, Kampus Bumi Tadulako Tondo, 94119, Palu, Indonesia
⁶ Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, 43, D-10115 Invalidenstr, Berlin, Germany
⁷ Department of Biology, IPB University, Kampus IPB Dramaga, 16911, Bogor, Indonesia
⁸ Zoological Community of Celebes (ZCC), Palu, 94119 Central Sulawesi, Indonesia

^* Corresponding author: witafar@apps.ipb.ac.id

Abstract

Caridina H. Milne-Edwards, 1837 has a high species diversity in the ancient lakes system in Sulawesi. To date, all Caridina species inhabited Lake Poso and Malili Lake System (N=15) have been documented from a relatively shallow water habitat. Here, we report for the first time Caridina spp. collected from deeper parts of Lake Poso using a new collection method. Fifteen specimens were collected from Peura and Meko Villages, using traditional bamboo traps. The specimens were morphologically identified and sequenced for molecular analysis. Based on morphology, the juveniles were identified as C. caerulea and the adults as C. longidigita. Both species were collected from 74 and 60 m depths, respectively. The results were further confirmed by genetic similarity using BLASTN, with >99 % percent identity for both species. This study provides the first record of Caridina spp. inhabiting deeper zones in the ancient lake of Sulawesi and provides initial signs of species behavior and adaptation in the ancient lake system.