Embryogenesis of Heterobranchus longifilis (Curvier and Valenciennes, 1840)

Olufeagba, S.O. and Raji, A. and Aluko, P.O. and Omotosho, J.S. and Oyewole, S.O. and Ogundele, O. (1999) Embryogenesis of Heterobranchus longifilis (Curvier and Valenciennes, 1840). In: 13th Annual Conference of the Fisheries Society of Nigeria (FISON) , 3-8 November 1996 ,New Bussa, Nigeria, pp. 275-281.

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Studies on development of H. longifilis (Curvier and Valenciennes, 1840) were conducted at a temperature of 25EC ( 1Ec) in aquaria tanks continuous development were monitored with the use of wild Heerbrugy photomacroscope and length of yolk and larva were monitored using Stereo Olympus microscope with ocular micrometer. The division into animal and vegetal poles was observed 22 minutes after activation. The first cleavage occurred 65 minutes after activation while the second division which was perpendicular to the first line of division occurred 74 minutes after activation. This was quickly followed by the third and fourth cleavage at 80th and 82nd minutes after activation respectively. Morular stage was reached at 4 hours 20 minutes with formation of optic bud at 14 hours 35 minutes. (DBO) Developing embryo hatched after 27 hours of activation at a mean length of 6.63 and mean yolk length of 2.17. Yolk size decrease at an average rate of 38.5 % till the 5th day of total absorption. Growth of larvae proceeded faster in tail-anus region than in anus-snout portion of the body. The rate of yolk absorption and larva development (survival) as monitored in this work gives important information in Research and development programme for H. longifilis larva - an important aspect of Research development and implementation of appropriate technologies in small scale fisheries

Item Type: Conference or Workshop Item
Title: Embryogenesis of Heterobranchus longifilis (Curvier and Valenciennes, 1840)
Personal Creator/Author:
Olufeagba, S.O.
Raji, A.
Aluko, P.O.
Omotosho, J.S.
Oyewole, S.O.
Ogundele, O.
Page Range: pp. 275-281
Date: 1999
Event Title: 13th Annual Conference of the Fisheries Society of Nigeria (FISON)
Event Type: Conference
Event Location: New Bussa, Nigeria
Event Dates: 3-8 November 1996
Issuing Agency: Fisheries Society of Nigeria
Uncontrolled Keywords: Nigeria, New Bussa; breeding; embryonic development; fish culture; genetics; Heterobranchus longifilis
Subjects: Aquaculture
Item ID: 3868
Depositing User: Ms Maria Kalentsits
Date Deposited: 18 Jul 2010 11:50
Last Modified: 29 Sep 2011 16:46
Related URLs:
URI: http://aquaticcommons.org/id/eprint/3868

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