New localities of the Oryzias woworae species group (Adrianichthyidae)

Kazunori Yamahira (Tropical Biosphere Research Center, University of the Ryukyus)
Koji Mochida (Tropical Biosphere Research Center, University of the Ryukyus Department of Biology, Keio University, Kanagawa)
Shingo Fujimoto (Tropical Biosphere Research Center, University of the Ryukyus)
Daniel F. Mokodongan (Tropical Biosphere Research Center, University of the Ryukyus)
Javier Montenegro (Tropical Biosphere Research Center, University of the Ryukyus)
Takuma Kaito (Tropical Biosphere Research Center, University of the Ryukyus)
Asano Ishikawa (Division of Ecological Genetics, National Institute of Genetics, Shizuoka)
Jun Kitano (Division of Ecological Genetics, National Institute of Genetics, Shizuoka)
Taketoshi Sue (PICUTA Ltd., Kimitsu, Chiba)
Mulis Mulis (Faculty of Fishery and Marine Science, Gorontalo State University)
Renny K. Hadiaty (Museum Zoologicum Bogoriense, Zoology Division of Research Center for Biology LIPI)
Ixchel F. Mandagi (Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado)
K.W. Alex Maseng (Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado)

Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology)
Vol 16 No 2 (2016): June 2016

The Oryzias woworae species group, composed of O. asinua, O. wolasi, and O. woworae, is a group of the family Adrianichthyidae endemic to Sulawesi Tenggara (Southeast Sulawesi). Here, we report new localities of each of the three species in this group, which were collected during our field expeditions in 2014-2015. In total, six new localities were discovered throughout Sulawesi Tenggara, including Muna Island, suggesting that they may have wider species ranges than currently recognized. Some of the new localities were independent of the river systems of the known localities, suggesting that each species is genetically structured, and that the unit for conservation should be considered not as each species but as each local population. Abstrak Kelompok spesies Oryzias woworae, family Adrianichthyidae, terdiri atas O. asinua, O. wolasi, dan O. woworae, merupakan spesies endemik di Sulawesi Tenggara. Selama ekspedisi lapangan tahun 2014-2015, kami mencatat setiap spesies dari ketiga spesies dalam grup ini dijumpai di beberapa lokasi baru. Secara keseluruhan, enam lokasi baru telah ditemukan sepanjang daerah Sulawesi Tenggara, termasuk Pulau Muna, yang menunjukkan bahwa grup tersebut kemungkinan memiliki daerah persebaran lebih luas dari yang diketahui saat ini. Sebagian lokasi baru berasal dari sistem aliran sungai yang berbeda dengan lokasi yang telah diketahui selama ini. Hal ini menunjukkan bahwa tiap spesies terstruktur secara genetik, dan bahwa unit konservasi harus dipertimbangkan bukan untuk tiap spesies tetapi untuk tiap populasi lokal.