Nutritional Transition Period In Early Larvae Marble Goby Oxyeleotris Marmoratus
The nutritional transition period of Oxyeleotris marmoratus were described based on the early development from hatching to 144 hours after fertilization (hAF) reared at 28-29oC. Long hatching period was observed with average hatching rate 70.1±13.2%. First hatching commenced at 24 hAF and continu...
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| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://eprints.unisza.edu.my/689/1/FH03-FBIM-17-09281.pdf http://eprints.unisza.edu.my/689/ |
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| Summary: | The nutritional transition period of Oxyeleotris marmoratus were described based on the early
development from hatching to 144 hours after fertilization (hAF) reared at 28-29oC. Long
hatching period was observed with average hatching rate 70.1±13.2%. First hatching
commenced at 24 hAF and continuous hatched until 96 hAF. The hatched larvae found
developed coincide as the embryo developed. At 24 hAF, larvae hatched with unpigmented
eyes and yolk (0.062±0.004 mm3
) located below a straight digestive tract, mouth not opened
and floated in water column. During endogenous nutrition phase, larval feeding system
developed with their mouth and alimentary canal. Larval sensory organs have developed at 60
hAF, as the eyes begun pigmentation, olfactory pits opened and free neuromast with cupulae
found on their head. At 84 hAF, first feeding on rotifer was observed as larvae possessed
peristaltic intestine, opened anus, functional lower jaw and pectoral fin, and demonstrated
horizontal swimming for foraging. This mixed nutrition phase occurred until 120 hAF when
yolk completely absorbed. Due to the short nutritional transition period (84-120 hAF),
phytoplankton and rotifers are suggested to provide to larvae before and during 84 hAF to
enhance the larval survival. |
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