TY - CONF T1 - Early Ontogenesis Of Small Nypa Palm Worm Namalycastis Abiuma (Polychaeta: Nereididae) T2 - Internatiomal Symposium on Indonesian Biodiversity Y1 - 2013 A1 - Junardi Junardi A1 - Tjandra Anggraeni A1 - Ahmad Ridwan A1 - Edy Yuwono KW - Larval KW - Namalycastis KW - Nypa palm worm KW - Ontogenesis KW - Polychaeta AB - The purposes of research to find the best condition for fertilisation and production of Nypa palm worm larvae (Namalycatis abiuma). Gamete samples were collected using a tube glass capilarry injected to the middle part of body segment of the matured worm. Artificial fertilisation was done by mixing the sperms and oocytes in the same container with sterilised sea water as the media. The initial development process prior to fertilisation was observed until benthic phase larvae (3-setigers). Fertilisation was done under salinity of 10-15‰ and water temperature of 27-29°C. The cleavage was achieved within 15-25 minutes and larval stage up to 260 minutes after fertilisation. The fertilisation and larval development of N. abiuma were highly influenced by the water salinity and temperature, room temperature and culture media JF - Internatiomal Symposium on Indonesian Biodiversity PB - Faculty of Biology, Jenderal Soedirman University CY - Purwokerto, Central Java, Indonesia ER -