1 Improved Artificial Breeding Techniques of Tiger Grouper (Epinephelus fuscoguttatus) Hussin Mat Ali, Ahmad Daud Om, Shaharah Mohd Idris, Sufian Mustafa and Teoh Pik Neng Marine Finfish Production and Research Center, Tanjung Demong, 22200 Besut, Terengganu. Abstract Artificial breeding of tiger grouper (Epinephelus fuscoguttatus) at Marine Finfish Production and Research Center, Besut, Terengganu (MAPREC) began in February 1995. The first breakthrough was achieved two months later in April 1995 using naturally spawned eggs. However, attempts to improve the breeding techniques and to commercialize the findings were not immediately carried out due to several technical and managerial constraints. In 2004 and 2005, artificial breeding of tiger grouper was resumed with reference developments in the field of system operation, larval nutrition and health management. Additional broodstock of various sizes ranging from 3.0 kg to 6.0 kg each were subjected to broodstock management methods such as natural and induce spawning in order to have a regular spawning and consistent egg quality. The eggs produced were hatched and reared under specific rearing methods and critical aspects of production in order to achieve the targeted survival rate of 3-5% for 35-45 day after hatching (DAH). The juveniles produced were then nursed in several types of nursery facilities to achieve 40 – 60% survival rate or 2% final survival rate when the fry attained 7.5 – 10.0 cm in total length (TL). Abstrak Pembiakan aruhan ikan kerapu harimau (Epinephelus fuscoguttatus) di Pusat Pengeluaran dan Penyelidikan Ikan Laut, Besut, Terengganu (PPPIL) bermula pada Februari 1995. Kejayaan pertama berlaku dua bulan selepas itu iaitu pada bulan April 1995 menggunakan telur semulajadi. Bagaimanapun, percubaan untuk meningkatkan teknik pembiakan dan untuk mengkomersial penemuan yang diperolehi telah tergendala akibat dari masalah teknikal dan pentadbiran. Pada tahun 2004 dan 2005, pembiakan kerapu harimau telah dimulakan semula dengan merujuk kepada perkembangan sistem operasi lapangan, pemakanan rega dan pengurusan kesihatan. Penambahan induk dari pelbagai saiz dari 3.0 kg hingga 6.0 kg telah dijalankan pengurusan induk seperti pembiakan aruhan dan semulajadi supaya peneluran akan berlaku dan kualiti telur yang konsisten akan didapati. Telur yang dihasilkan ditetaskan dan di ternak dengan kaedah yang spesifik dan aspek pengeluaran yang kritikal supaya kadar hidup dapat ditingkatkan dengan kadar 3-5% pada hari 35-45 selepas penetasan. Ikan juvenil yang dihasilkan akan diternak dengan beberapa kaedah asuhan untuk mencapai kadar hidup 40-60% ataupun 2% kadar hidup akhir apabila ikan telah mencapai saiz 7.5 – 10.0 cm panjang totalnya.