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Journal : Acta Aquatica: Aquatic Sciences Journal

The potential of fishery waste as an alternative source of natural calcium: a review Suprihadi, Suprihadi; thaib, Azwar; Nurhayati, Nurhayati; Handayani, Lia
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 10: No. 2 (August, 2023)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v10i2.9755

Abstract

Research on calcium minerals that are effective and safe for health and the environment is being developed. These studies aim to find natural ingredients that contain high mineral levels, study effective methods, and study the characteristics of calcium obtained. Natural calcium is interesting to develop because it comes from renewable natural resources such as those fishery wastes. This article contains a study of the potential of fish bones, shellfish shells, and crustacean shells as natural sources of calcium and methods of manufacture. Oyster shells that are crushed at 900°C for 2 hours will produce Ca2+ levels of 56.77% while calcination for 4 hours produces Ca2+ = 86.22%. direct shells calcined at 900°C; 4 hours yields Ca2+= 77.15%.   The yield produced with a calcination time of ‰¥ 4 hours is relatively stable, which is 55 -57 %.Keywords: Calcium; Clam shells; crustacean shells; fish bones 
Effects of vitamin C dosage levels on growth and survival rate of sidat fish (Anguilla bicolor, McClelland, 1844) Muamar, Abdan; Hasri, Iwan; Harun, Harun; Suprihadi, Suprihadi; Saputra, Fazril; Fahmi, Rizkan; Hardiansyah, Hardiansyah
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 11: No. 1 (April, 2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v11i1.13858

Abstract

Eel is a species with high economic value, but its slow growth and low survival rate are problems that need to be addressed through the development of effective cultivation technology. This study aimed to investigate the effects of vitamin C dosage on the growth and survival of eels (Anguilla bicolor). This study was conducted at the UPR. Mina Mandiri, Beutong District, Nagan Raya Regency, during the period August to October 2023. The method used was a completely randomized design with four treatment levels and three replications, namely 0, 200, 300, and 400 mg/kg feed. ANOVA results showed that the dose of vitamin C had a significant effect on the growth and survival of eels (P < 0.05). Further tests using Duncan's method showed significant differences between treatments in growth parameters, but there was no significant difference in survival. The 200 mg/kg feed dose showed the highest and optimal results in terms of increasing the growth and survival of eel fish.Keywords: Culture technology; eel; growth; vitamin C