NIGERIAN JOURNAL OF SCIENCE AND ENVIRONMENT
Journal of the Faculties of Science and Agriculture, Delta State University, Abraka, Nigeria

ISSN: 1119-9008
DOI: 10.5987/UJ-NJSE
Email: njse@universityjournals.org


A COMPARATIVE STUDY ON THE BREEDING PERFORMANCE OF BIDORSALIS HETEROBRANCHUS AND HETEROBRANCHUS LONGIFILIS, USING THREE DOSES OF OVAPRIM

DOI: 10.5987/UJ-NJSE.16.005.2   |   Article Number: 4B1D865   |   Vol.12 (2) - September 2013

Author:  Nwaduekwe F.O

Comparative analysis was carried out on induced breeding of Heterobranchus bidorsalis and Heterobranchus

longifilis, using ovaprim at three doses, viz 4ml/Kg, 5ml/Kg and 6ml/Kg of female

broodfish weight. Latency period and time of hatching were similar for both fish species. The dosage

of 4mg/Kg gave 2.66% fertilization among H.bidorsalis eggs and no fertilization among H.

longifilis eggs. No hatching occurred at this hormone dosage with 5mg/Kg of hormone of dosage,

mean fertilization and hatching values were 49.17±5.73 and 38.75 ±5.10 respectively for H. bidorsalis

and 37.42±7.00 and 26.08 ± 3.82 respectively for H. longifilis. However, the dosage of 6mg/

kg gave the best results of 65.58±4.54 and 59.75±4.41 for fertilization and hatching rates respectively

in H. bidorsalis. In H. longifilis, the same dosage gave fertilization and hatching rates of

51.75±4.47 and 47.16±4.73 respectively. Mean water temperature in the broodstock ponds was

28.42oC ± 1.55, dissolved oxygen was 1.64mg/L±0.56 during the study period. Students t-test

should no significant difference (P>0.03) in survival of fry of fish species after 10 days of rearing

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