Open AccessInduced Breeding of Two Clariid Catfishes Clurius gariepinus and Heterobranchus bidorsalis Using Tilapia Pituitary Extracts
Author(s) -
Salami Adekunle A.,
BelloOlusoji Oluayo A.,
Fagbenro Oyedapo A.,
AkegbejoSamsons Yeml
Publication year - 1997
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.1997.tb00969.x
Subject(s) - biology , clarias gariepinus , ovulation , human fertilization , tilapia , zoology , hatching , intramuscular injection , fishery , catfish , hormone , fish <actinopterygii> , anatomy , endocrinology , medicine
Induced breeding trials of two clariid catfishes, Clarias gariepinus and Heterobranchus bidorsalis , were conducted using five doses (2, 4, 6, 8 or 10 mg/kg) of acetone‐dried tilapia pituitary (ADTP) extracts. Oocyte maturation and ovulation were induced in female catfishes by single intramuscular injection of 6–10 mgkg ADTP; optimum results were obtained with 8 mgkg in both catfishes. At ambient temperature (27 ± 1 C). ovulation occurred within 14–18 h post‐injection resulting in 16–20% increase in egg diameter. Fertilization and hatching percentages increased ( P < 0.05) with increases in hormone dosage. Survival of fry fed a mixed zooplankton diet was high (ranging from 79% to 85%) after 30 d of rearing.