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Embryonic Development of Discus, Symphysodon aequifasciatus Pellegrin, 1904 in Indian Condition

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Relation http://eprints.cmfri.org.in/14759/
https://www.ijcmas.com/9-6-2020/Sambid%20Swain,%20et%20al.pdf
https://doi.org/10.20546/ijcmas.2020.906.265
 
Title Embryonic Development of Discus, Symphysodon aequifasciatus Pellegrin, 1904 in Indian Condition
 
Creator Swain, S
Sawant, Paramita Banerjee
Sundaray, J K
Chhandaprajnadarsini, E M
Katare, Milind B
 
Subject Fish biology
Ornamental Fishes
 
Description 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.
 
Date 2020
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/14759/1/International%20Journal%20of%20Current%20Microbiology%20and%20Applied%20Sciences_2020_Chhandaprajnadarsini%20E%20M_Embryonic%20Development%20of%20Discus%20in%20indian%20condition.pdf
Swain, S and Sawant, Paramita Banerjee and Sundaray, J K and Chhandaprajnadarsini, E M and Katare, Milind B (2020) Embryonic Development of Discus, Symphysodon aequifasciatus Pellegrin, 1904 in Indian Condition. International Journal of Current microbiology and Applied Sciences, 9 (6). pp. 2170-2177.