EGG HATCHING RATES OF BROWN-MARBLED GROUPER, EPINEPHELUS FUSCOGUTTATUS UNDER DIFFERENT LIGHT WAVELENGTHS AND INTENSITIES
Article Sidebar
Main Article Content
Abstract
This study was conducted to examine the egg hatching rates of brown-marbled grouper,
Epinephelus fuscoguttatus under different light conditions in terms of light wavelengths and intensities. Results of
two-way ANOVA showed significant difference for light wavelengths (p<0.05), while light intensities showed no
significant difference. There was no interaction between light wavelengths and intensities. Post-hoc Tukey test
showed that hatching rates under green light wavelength were significantly higher than white and yellow light
wavelengths (p<0.05). When white light 2.7 µmoles/m²/s was set as the control, the hatching ratio of the brownmarbled
grouper under green light 2.7 µmoles/m²/s was almost three times higher than the control. The lowest ratio
of hatching rates was observed under the white light 13.3 µmoles/m²/s with 70 percent lower ratio of hatching rates
than the control light. Eggs hatching under other light conditions mostly showed higher ratios than the control light.
ABSTRAK Kajian ini dijalankan untuk mengkaji kadar penetasan telur kerapu harimau, Epinephelus
fuscoguttatus di bawah keadaan cahaya yang berbeza dari segi jarak gelombang dan keamatan. Keputusan ANOVA
dua hala menunjukkan panjang gelombang cahaya menunjukkan perbezaan yang signifikan (p<0.05), manakala
tiada perbezaan yang signifikan bagi keamatan cahaya. Panjang gelombang cahaya dan keamatan cahaya tidak
berkaitan antara satu sama lain dalam mempengaruhi penetasan telur ikan kerapu harimau. Keputusan ujian post-hoc
Tukey telah menunjukkan kadar penetasan di bawah panjang gelombang cahaya hijau adalah jauh lebih signifikan
daripada cahaya putih dan cahaya panjang gelombang kuning (p<0.05). Apabila cahaya putih 2.7 μmol/m²/s
ditetapkan sebagai kawalan, nisbah penetasan ikan kerapu harimau di bawah cahaya hijau 2.7 μmol/m²/s adalah
hampir tiga kali ganda lebih tinggi daripada kawalan. Nisbah kadar penetasan paling rendah diperhatikan di bawah
cahaya putih 13.3 μmol/m²/s, dengan nisbah kadar penetasan 70 peratus lebih rendah daripada kawalan. Telur
menetas di bawah keadaan cahaya yang lain kebanyakannya menunjukkan nisbah yang lebih tinggi daripada
kawalan.
Keywords: Brown-marbled grouper, Epinephelus fuscoguttatus, light wavelengths, light intensities, egg hatching
rates
Downloads
Article Details
Transfer of Copyrights
- In the event of publication of the manuscript entitled [INSERT MANUSCRIPT TITLE AND REF NO.] in the Malaysian Journal of Science, I hereby transfer copyrights of the manuscript title, abstract and contents to the Malaysian Journal of Science and the Faculty of Science, University of Malaya (as the publisher) for the full legal term of copyright and any renewals thereof throughout the world in any format, and any media for communication.
Conditions of Publication
- I hereby state that this manuscript to be published is an original work, unpublished in any form prior and I have obtained the necessary permission for the reproduction (or am the owner) of any images, illustrations, tables, charts, figures, maps, photographs and other visual materials of whom the copyrights is owned by a third party.
- This manuscript contains no statements that are contradictory to the relevant local and international laws or that infringes on the rights of others.
- I agree to indemnify the Malaysian Journal of Science and the Faculty of Science, University of Malaya (as the publisher) in the event of any claims that arise in regards to the above conditions and assume full liability on the published manuscript.
Reviewer’s Responsibilities
- Reviewers must treat the manuscripts received for reviewing process as confidential. It must not be shown or discussed with others without the authorization from the editor of MJS.
- Reviewers assigned must not have conflicts of interest with respect to the original work, the authors of the article or the research funding.
- Reviewers should judge or evaluate the manuscripts objective as possible. The feedback from the reviewers should be express clearly with supporting arguments.
- If the assigned reviewer considers themselves not able to complete the review of the manuscript, they must communicate with the editor, so that the manuscript could be sent to another suitable reviewer.
Copyright: Rights of the Author(s)
- Effective 2007, it will become the policy of the Malaysian Journal of Science (published by the Faculty of Science, University of Malaya) to obtain copyrights of all manuscripts published. This is to facilitate:
- Protection against copyright infringement of the manuscript through copyright breaches or piracy.
- Timely handling of reproduction requests from authorized third parties that are addressed directly to the Faculty of Science, University of Malaya.
- As the author, you may publish the fore-mentioned manuscript, whole or any part thereof, provided acknowledgement regarding copyright notice and reference to first publication in the Malaysian Journal of Science and Faculty of Science, University of Malaya (as the publishers) are given. You may produce copies of your manuscript, whole or any part thereof, for teaching purposes or to be provided, on individual basis, to fellow researchers.
- You may include the fore-mentioned manuscript, whole or any part thereof, electronically on a secure network at your affiliated institution, provided acknowledgement regarding copyright notice and reference to first publication in the Malaysian Journal of Science and Faculty of Science, University of Malaya (as the publishers) are given.
- You may include the fore-mentioned manuscript, whole or any part thereof, on the World Wide Web, provided acknowledgement regarding copyright notice and reference to first publication in the Malaysian Journal of Science and Faculty of Science, University of Malaya (as the publishers) are given.
- In the event that your manuscript, whole or any part thereof, has been requested to be reproduced, for any purpose or in any form approved by the Malaysian Journal of Science and Faculty of Science, University of Malaya (as the publishers), you will be informed. It is requested that any changes to your contact details (especially e-mail addresses) are made known.
Copyright: Role and responsibility of the Author(s)
- In the event of the manuscript to be published in the Malaysian Journal of Science contains materials copyrighted to others prior, it is the responsibility of current author(s) to obtain written permission from the copyright owner or owners.
- This written permission should be submitted with the proof-copy of the manuscript to be published in the Malaysian Journal of Science