Gonadal recrudescence and induced spawning in Barbus altianalis

Justus Rutaisire, Berta Levavi-Sivan, Cassius Aruho, Constantine Chobet Ondhoro

Research output: Contribution to journalArticlepeer-review

Abstract

Gonadal recrudescence in Barbus altianalis from River Nile, Jinja (33°05E; 0°45N) Uganda was studied prior to induced spawning. Oocytes in B. altianalis were found to develop in cohorts suggesting batch spawning throughout the year with pronounced spawning activities coinciding with rainfall peaks of April and September. There was a strong positive correlation between rainfall and gonadosomatic index (rS = 0.75, P = 0.008). B. altianalis had low fecundity (6.0 ± 2.0 per gram) and large-sized eggs (2.97 ± 0.1 mm). Induced spawning was successful with exogenous hormones and water current. Results from this study suggested that total striping may not be appropriate, but larger eggs would confer high survival of offsprings under optimal conditions. The success registered in induced spawning of B. altianalis provides a breakthrough in seed production for multiplication and culture of this economically important fish species.

Original languageAmerican English
Pages (from-to)669-678
Number of pages10
JournalAquaculture Research
Volume46
Issue number3
DOIs
StatePublished - 1 Mar 2015

Keywords

  • Barbus altianalis
  • Gonado recrudescence
  • Induced spawning

All Science Journal Classification (ASJC) codes

  • Aquatic Science

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