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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Embryonic and external larval development and sexual maturity of the African catfish Heterobranchus isopterus (Siluroidei, Clariidae)

SK Da Costa, G Gourene and GG Teugels (1996)

Embryonic and external larval development and sexual maturity of the African catfish Heterobranchus isopterus (Siluroidei, Clariidae)

BELGIAN JOURNAL OF ZOOLOGY, 126(2):93-109.

The embryonic and external larval development of the African catfish Heterobranchus isopterus (Clariidae) has been described chronologically up to 23 days of age. The ontogeny of this species is similar to that of H. longifilis. However, the growth rate of embryonic and larval development in H. isopterus is slower. Also the adhesive pastille on the yolk sac of the post-hatching larvae is absent. At the age of 6 days, cannibalism was noted. The juvenile period starts after 23 days at 26 degrees C. Sexual maturity and the effect of temperature on the eggs have also been studied in H. isopterus. The study of oocyte diameter and influence of temperature on embryonic development enabled to conclude that the species can be reproduced throughout the year. The optimal hatching rate and the highest ratio of normal larvae are obtained between 24 degrees C and 26 degrees C.

Clariidae; Heterobranchus isopterus; ontogeny; incubation; temperature; hatching; reproduction; fish culture
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



1863-1903
Annales de la Société malacologique de Belgique
 
1903-1923
​Annales de la Société royale malacologique et zoologique de Belgique
 
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Annales de la Société Royale Zoologique de Belgique
 
1989-
Belgian Journal of Zoology