Nuralim Pasisingi, Abdul H. Olii, Juliana
The high demand for amphidromous nike goby fish larvae in Gorontalo waters can cause a severe imbalance in the natural population, since the larval stage is crucial for its regeneration. Domestication is one of the strategic steps to provide fish stocks without altering their natural sustainability. This research aimed to determine the survival rate, growth in length and body weight of nike fish and monitor the dynamics of rearing water quality in laboratory experiments. Twenty-five fish larvae were reared in 3 containers (size 30 x 20 x 20 cm3, water volume 5 L) for 11 consecutive days. Tests of larvae's survival, length, and weight were recorded daily, while media quality measurements were carried out every 6 hours (06.00, 12.00, 18.00, and 24.00 h). The experiment revealed that the average survival rate of fish larvae during rearing was 20%. The results of single-factor ANOVA statistical testing on observations of individual larval size did not show any significant differences between observation days (p>0.05). The average total length and weight of the sampled nike fish were determined from individual larvae that survived during 11 days of the experiment: 26.36±0.49 mm and 0.15±0.01 g, respectively. The water quality parameters, namely the temperature (21.43-30.50oC), dissolved oxygen (7.32-9.01 mg L-1), pH (6.65-7.50), salinity (31.93-38.00 ppt), TDS (25.63-33.33 mg L-1), and conductivity (40.30-65.97 µS cm-1), were in the ranges tolerated by the nike fish. Generally, the positive allometric growth pattern shown by this amphidromous species indicates a high adaptive ability in captive environments and potential for domestication. Further experiments need to involve other factors related to the living characteristics of amphidromous species. © 2024, BIOFLUX SRL. All rights reserved.
Aquatic Resources Management Study Programme, Faculty of Marine and Fisheries Technology, Universitas Negeri Gorontalo, Kota Tengah, Gorontalo Province, Gorontalo City, Indonesia; Aquaculture Study Programme, Faculty of Marine and Fisheries Technology, Universitas Negeri Gorontalo, Kota Tengah, Gorontalo Province, Gorontalo City, Indonesia
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