Chen Ban Leong (2009) Effects of delayed first feeding on the survival and growth of marble goby, oxyeleotris marmoratus larvae. Universiti Malaysia Sabah. (Unpublished)
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Abstract
Larval observation was done in marble goby, Oxyeleotris marmoratus larvae to determine the morphologically prepared time for first feeding, time when presence of rotifer Brachionus sp. inside the gut and time when the yolk sac fully absorbed. After the observation step, experiment on the delayed first feeding was carried out. Thirty aquarium (18 x 26 x 17 cm) were prepared and divided into triplicate groups. The larvae were reared up to 10 day after hatch (d AH). The first feeding was given at 31 hour after hatch (h AH) in control tank fish while in the other tanks, the first feeding was delayed every 24 hours up to 247 h AH. Based on the observation, larvae are morphologically prepared for first feeding at 31 h AH and yolk sac was fully absorbed at 86 h AH at temperature 26-27 °C. Therefore, nutrition transition period (NTP) for 0. marmoratus is from 31 to 86 h AH. Results showed that the mean survival rates were highest 64.00±3.72 % (31 h AH), and lowest 2.00±2.91 % (223 h AH). The mean total length were highest 4.97±0.26 mm (55 h AH), and lowest 3.50±0.16 mm (247 h AH). The results showed mean survival rate and total length was decreased when we delayed the first feeding timing. This proved that delayed first feeding will lead to low survival and growth. Interestingly, deformities were also observed in the treatment of 151, 175, 199, 223 and 247 h AH. The deformed larvae have bended body, and it showed absence of dorsal and anal fin. From the results, the morphology prepared for first feeding time of marble goby was happened at 31 h AH. The larval survival and growth can be improved by determining the optimum first feeding timing. The optimum time for first feeding of marble goby was achieved at 55 h AH because the best survival and growth was achieved at this time.
| Item Type: | Academic Exercise |
|---|---|
| Keyword: | Larval, Marble goby, Oxyeleotris marmoratus |
| Subjects: | S Agriculture > SH Aquaculture. Fisheries. Angling > SH1-691 Aquaculture. Fisheries. Angling > SH20.3-191 Aquaculture > SH151-179 Fish culture |
| Department: | SCHOOL > School of Science and Technology |
| Depositing User: | DG MASNIAH AHMAD - |
| Date Deposited: | 28 Jun 2023 11:49 |
| Last Modified: | 28 Jun 2023 11:49 |
| URI: | https://eprints.ums.edu.my/id/eprint/35705 |
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