Siti Fairus Mohamed Yusoff (2013) Effects of delayed first feeding on feeding ability, growth and survival of marble goby, Oxyeleotris marmoratus Larvae. Masters thesis, Universiti Malaysia Sabah.
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Abstract
The effects of delayed first feeding on feeding ability, growth and survival of marble goby, Oxyeleotris marmoratus larvae were studied under controlled conditions. Three experiments were designed to achieve the objectives of this study. Larvae were reared in six different delayed first feeding times which were 0, 12, 24, 36, 48 and 60 hours delayed first feeding (hDFF) for Experiment I and III, while for Experiment II, it was reared in 0, 1, 2, 3, 4 and 5 days delayed first feeding (dDFF). Experiment I was conducted to examine the effect of delayed first feeding on the larval nutrition transition period (NTP) by measuring the yolk sac volume and oil globule volume changes and absorption period, morphometrical changes of body height (BH), muscle height (MH) and gut height (GH) at different delayed first feeding time and intestinal epithelium height changes for fed at O hDFF and starved larvae. From the results, it showed that, 0 hDFF treatment has the longest NTP (50 h) and, as the delayed first feeding time prolonged, the yolk sac was consumed rapidly and even led to shorter NTP. It was observed that, larvae reared in O and 12 hDFF showed significantly higher (P<0.05) BH, MH and GH compared to other treatments. Meanwhile, larvae showed no significant differences (P>0.05) in 0, 12 and 24 h intervals of intestinal epithelium height changes for fed and starved but significantly lower ( P<0.05) for 36, 48 and 60 hDFF larvae. Experiment II was conducted to investigate the effect of delayed first feeding on larval feeding ability by examining feeding incidence and intensity. Feeding incidence for 1 and 2 dDFF significantly higher (P<0.05) compared to 0 (63.33 %), 3 (36.67 %), 4 (36.67 %) and 5 dDFF (30.00 %) treatments. Meanwhile O (29 ind.larva-1) and 1 dDFF (26 ind.larva-1) larvae showed significantly higher (P<0.05) feeding intensity compared to 3 (16 ind.larva-1), 4 (13 ind.larva-1) and 5 dDFF (3 ind.larva-1) with no significant difference with 2 dDFF (22 ind.larva- 1). Based on the findings of larval feeding incidence, the larval point of no return (PNR) was determined between 3 to 4 dDFF which is coincidence with 4.5 to 5.5 dAH. Experiment III was conducted to determine the effect of delayed first feeding on larval growth (TL) and survival (%) until 15 dAH.The results revealed that 0 (3.32±0.02 mm), 12 (3.42±0.08 mm), 24 (3.32±0.02 mm) and 36 hDFF (3.28±0.16 mm) showed significantly higher (P<0.05) growth compared to 48 (3.22±0.11 mm) and 60 hDFF (3.14±0.08 mm) treatments. Meanwhile result on the survival had shown O (52.67±10.37%), 12 (46.67±6.71%) and 24 hDFF (39.67±8.07%) showed significantly higher (P<0.05) survival compared to other treatments. From the results the first feeding of O.marmoratus larvae can be delayed up to 24 h with no significant differences (P>0.05) in all parameters. However, it was suggested that the first feeding of O.marmoratus larvae should be initiated at O hDFF (36 hAH) at 29±0.5°c for the enhancement of larval feeding ability, growth and survival.
| Item Type: | Thesis (Masters) |
|---|---|
| Keyword: | Oxyeleotris marmoratus, Delayed first feeding, Larval feeding ability, Larval growth and survival, Nutritional transition period |
| Subjects: | S Agriculture > SH Aquaculture. Fisheries. Angling > SH1-691 Aquaculture. Fisheries. Angling > SH20.3-191 Aquaculture > SH151-179 Fish culture |
| Department: | INSTITUTE > Borneo Marine Research Institute |
| Depositing User: | DG MASNIAH AHMAD - |
| Date Deposited: | 21 May 2025 11:03 |
| Last Modified: | 21 May 2025 11:03 |
| URI: | https://eprints.ums.edu.my/id/eprint/43821 |
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