Sains Malaysiana 49(7)(2020): 1567-1576

http://dx.doi.org/10.17576/jsm-2020-4907-09

Growth Performance and Organoleptic Quality of Hybrid Grouper (Epinephelus fuscogutattus ♀ × Epinephelus lanceolatus ♂) Fed Palm-Oil Based Diets at Grow-Out Stage

(Prestasi Pertumbuhan dan KualitiOrganoleptik Kerapu Hibrid(Epinephelus fuscoguttatus♀ x Epinephelus lanceolatus♂) yang diberi Diet Berasaskan Minyak Sawit pada Peringkat Tumbesaran)

SANDRA NATALIE GUDID¹, LIM LEONG SENG¹, ANNITA YONG SEOK KIAN¹, UUN YANUHAR², SALEEM MUSTAFA¹ & ROSSITA SHAPAWI¹*

¹Borneo Marine Research Institute, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah, Malaysia

²Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, Brawijaya Univesity, Malang, 65144, Indonesia

Received: 11 January 2020/Accepted: 9 March 2020

ABSTRACT

The performance of crude palm oil (CPO)-based diets in the grow-out stage of hybrid grouper (Epinephelus fuscoguttatus × Epinephelus lanceolatus) was examined in a net-seacage culture system. Isoproteic (50% crude protein) and isolipidic (16% crude lipid) experimental diets were formulated to replace fish oil (FO) at 25% increment level; 25CPO, 50CPO, 75CPO, and 100CPO. The FO-based diet was formulated to serve as a control treatment (100FO). Triplicate groups of hybrid grouper containing 30 fish per treatment were stocked in 15 cages and fed once daily.  After 4 months of feeding trial, no significant differences (p>0.05) were observed in terms of growth performance, survival, feed utilization efficiency, body indices, fillet yield, and condition factor of fish fed different experimental diets. Except for total cholesterol, all parameters for blood analysis showed no significant differences (p>0.05) among the treatments. Findings from the organoleptic test showed that all fillets were well accepted by the consumers without any significant differences in their scores (p>0.05). In conclusion, CPO is an excellent source of lipid to replace fish oil in the grow-out diet for hybrid grouper, Epinephelus fuscoguttatus × Epinephelus lanceolatus.

Keywords: Cost-effective feed; grow-out; growth performance; hybrid grouper; palm oil

ABSTRAK

Prestasi diet berasaskan minyak sawit mentah (CPO) pada peringkat tumbesaran kerapu hibrid(Epinephelus fuscoguttatus × Epinephelus lanceolatus) telah diperiksa di dalam sistem pengkulturan sangkar jaring di laut. Diet isoproteik (50% protein mentah) dan isolipidik (16% lipid mentah) telah diformulasi untuk menggantikan minyak ikan (FO) pada tahap 25% kenaikan; 25CPO, 50CPO, 75CPO dan 100CPO. Diet berasaskan FO telah dirumus untuk menjadi diet kawalan (100FO).  Kumpulan triplikat kerapu hibrid yang mengandungi 30 ekor ikan per rawatan telah distok di dalam 15 sangkar dan diberi makan sekali sehari. Selepas 4 bulan percubaan pemakanan, tiada perbezaan bererti (p>0.05) yang diperhatikan daripada segi prestasi pertumbuhan, kemandirian, kecekapan penggunaan makanan, indeks badan, hasil filet dan faktor keadaan ikan yang diberi makan diet uji kaji berlainan. Kecuali untuk kolesterol, semua parameter untuk analisis darah menunjukkan tiada perbezaan bererti (p>0.05) dalam rawatan. Penemuan daripada ujian organoleptik menunjukkan bahawa semua filet dapat diterima dengan baik oleh pengguna tanpa mempunyai perbezaan bererti (p>0.0.5) dalam semua rawatan. Secara kesimpulannya, CPO adalah sumber lipid yang cemerlang untuk menggantikan minyak ikan di dalam diet tumbesaran untuk kerapu hibrid, Epinephelus fuscoguttatus × Epinephelus lanceolatus.

Kata kunci: Kerapu hibrid; makananan berkos-efektif; minyak sawit; prestasi pertumbuhan; tumbesaran

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*Corresponding author; email: rossita@ums.edu.my