International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 9, Issue:6, June, 2020

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(6): 2170-2177

Embryonic Development of Discus, Symphysodon aequifasciatus Pellegrin, 1904 in Indian Condition
Sambid Swain1,2, Paramita Banerjee Sawant1*, J. K. Sundaray3, E. M. Chhandaprajnadarsini4 and Milind B. Katare1
1ICAR-Central Institute of Fisheries Education, Mumbai, India
2Centurion University of Technology and Management, Odisha, India
3ICAR- Central Institute of Freshwater Aquaculture, India
4ICAR-Central Marine Fisheries Research Institute, Kochi, India
*Corresponding author

The experiment was conducted to investigate the embryonic development of discus (Symphysodon aequifasiatus) and determine the time required for major egg developmental stages and hatching. Regular observations were made using optical microscope and the images were recorded using a digital camera attached to the microscope. Important water quality parameters were kept optimal for the hatching of discus eggs. Newly laid eggs were oval-shaped and yellow in colour with an average diameter of 1.37 ± 0.14 mm. The embryonic development of fertilized eggs was divided into 16 stages and the development of each stage was recorded in times lapse. The result revealed that cleavage occurred after 1hr after fertilization followed by development of blastula and gastrula at 20.5 hr and 24 hr after fertilization respectively. The period of organogenesis started with the formation of embryonic notochord from 37.5 hrs after fertilization. The appearance of a defined head and tail of the embryo with 19 somites was observed at 40.0 hrs after fertilization, whereas heart beat along with blood circulation appeared after 55.5 hrs after fertilization. The eggs hatched after 69.06 hr after fertilization.

Keywords: Embryology, Hatching, Development, Discus

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How to cite this article:

Sambid Swain, Paramita Banerjee Sawant, J. K. Sundaray, E. M. Chhandaprajnadarsini and Milind B. Katare. 2020. Embryonic Development of Discus, Symphysodon aequifasciatus Pellegrin, 1904 in Indian Condition.Int.J.Curr.Microbiol.App.Sci. 9(6): 2170-2177. doi:
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