Affiliations 

  • 1 Department of Fisheries and Aquaculture,University of Agriculture,Makurdi,Nigeria
  • 2 School of Fisheries and Aquaculture Sciences,Universiti Malaysia Terengganu,Malaysia
Zygote, 2017 Aug;25(4):443-452.
PMID: 28635581 DOI: 10.1017/S0967199417000259

Abstract

Breeding and larval performance of novel hybrids from reciprocal crosses of Asian catfish Pangasianodon hypophthalmus (Sauvage, 1878) and African catfish Clarias gariepinus (Burchell, 1822) were investigated in this study. Spawning was by hormonal injection of brood fish, artificial fertilization, and incubation in triplicate aquarium tanks (0.5 × 0.5 × 0.5 m3) with continuous aeration. Reciprocal crosses (♀C. gariepinus × ♂P. hypophthalmus and ♀P. hypophthalmus × ♂C. gariepinus) had lower hatchability (≤50%) than their pure siblings (≥75%). Fish from all crosses survived until the juvenile stage but survival at 35 days post hatching (dph) was higher for pure C. gariepinus sib. ♀C. gariepinus × ♂P. hypophthalmus was observed to be less resistant to degradation of water quality than the other crosses, however it had higher body weight compared with the other crosses that showed similar performance. Morphological comparison of surviving juvenile at 35 dph, showed that all ♀P. hypophthalmus × ♂C. gariepinus and 13% of the ♀C. gariepinus × ♂P. hypophthalmus exhibited the very same morphology as that of their maternal parent species, while the other portion of the ♀C. gariepinus × ♂P. hypophthalmus cross exhibited morphological traits that were intermediate between those of both parent species. This study been the first successful attempt to hybridize both species and therefore, laid the groundwork for further studies on the aquaculture potentials of the novel hybrids.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.