Embryonic development in Clarias gariepinus under laboratory conditions

Sule, O.D. and Adikwu, I.A. and Aluko, P.O. (2003) Embryonic development in Clarias gariepinus under laboratory conditions. In: 16th Annual Conference of the Fisheries Society of Nigeria (FISON) , 4-9 November 2001 ,Maiduguri, Nigeria, pp. 266-270.

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Abstract

The embryonic development in Clarias gariepinus was studied under laboratory conditions. The developmental stages of eggs starting from first cleavage were examined microscopically. Photomicroscope was used to take important stages of segmentation, blastulation, differentiation of embryo and hatching. The films of the photograph were developed and printed for each stage produced. The accurate timing and detailed description of each stage was done. The results show that the blastodisc (Polar cap) appeared about 35 minutes after fertilization and the first cleavage dividing the blastodisc into two blastomeres occurs 15 minutes after polar cap formation. Details of the developmental stages of embryos and the timing from one stage to the other were described. The larva shook off the shell and emerged completely from the egg case about 22 hours after fertilization at a water temperature of 25.1 degree C. The accurate determination of the time of initiation of first mitosis is of great importance in fish culture and breeding especially in the production of tetraploids

Item Type: Conference or Workshop Item
Title: Embryonic development in Clarias gariepinus under laboratory conditions
Personal Creator/Author:
CreatorsEmail
Sule, O.D.
Adikwu, I.A.
Aluko, P.O.
Page Range: pp. 266-270
Date: 2003
Event Title: 16th Annual Conference of the Fisheries Society of Nigeria (FISON)
Event Type: Conference
Event Location: Maiduguri, Nigeria
Event Dates: 4-9 November 2001
Issuing Agency: Fisheries Society of Nigeria
Uncontrolled Keywords: Nigeria; developmental stages; eggs; embryonic development; embryos; freshwater fish; Clarias gariepinus
Subjects: Biology
Aquaculture
Item ID: 3631
Depositing User: Ms Maria Kalentsits
Date Deposited: 07 Jul 2010 07:11
Last Modified: 29 Sep 2011 17:04
URI: http://aquaticcommons.org/id/eprint/3631

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