WAKTU BEREPRODUKSI KARANG Acropora nobilis: KAITANNYA DENGAN FASE BULAN DAN KONDISI PASANG SURUT

Abstract

Artikel ini sdh dipresentasekan dalam kegiatan Seminar Nasional Perikanan Jakarta dan telah diterbitkan di prosiding Seminar Nasional Jakarta Tahun 2003The timing of reproduction of Acropora nobilis in relations to lunar patterns (moon phases) and tidal cycles was studied in Barrang Lompo Island, Makassar, Indonesia. Eight colonies A. nobilis with >20 cm in colony diameter were taken randomly in NW of coral reef waters, Barrang Lompo Island. Immediately, samples were transported to site observation in SE of island and adapted until one month. Dives were made 3 or 4 nights before and after in each moon phase following to observe reproduction in situ during one moon cycle (4 moon phases) from 14 January to 14 February 2002. The results showed that timing of spawning from A. nobilis were occurred during 3 nights in the full moon and 4 nights in the new moon (the dark moon). Colony proportion was more intensive spawned in the new moon (100% in one night before the new moon) with the hours of gamete release were took place between 18.00 and 20.00. The timing of reproduction was occurred when a peak the high tide and go on headed for the low tide