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<p><i>Devario devario</i> (Bengal danio), a vibrant freshwater cyprinid with ornamental value, lacks established captive breeding protocols, limiting sustainable aquaculture development. This study presents the first hormone-induced breeding protocol and embryological timeline for <i>D. devario</i>. Seventy-five mature individuals were subjected to breeding trials using varying OVASIS hormone concentrations (0–2.0&#xa0;ml/kg). Treatment 3 (1.5&#xa0;ml/kg females, 1.0&#xa0;ml/kg males) yielded optimal: 6.42-hour latency, 90% spawning success, 85% fertilization, and 90% hatching success. Fertilized eggs measured 0.6 ± 0.3&#xa0;mm diameter, were transparent, weakly adhesive to substrate, and demersal. Complete embryonic development occurred within 20.0&#xa0;h, producing larvae measuring 3.46 ± 0.4&#xa0;mm. This represents accelerated development compared to related species: <i>Devario aequipinnatus</i> (35–36&#xa0;h) and <i>Danio dangila</i> (68–72&#xa0;h), demonstrating superior breeding efficiency. The established protocol enables sustainable production, reducing pressure on wild populations while supporting aquaculture industry growth.</p>

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First Successful Induced Breeding Protocol for Bengal Danio Devario devario (Hamilton, 1822)

  • 期刊论文

  • 发表日期：

    2026年4月9日

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  • Manoj Talukdar,
  • Diksheeta Chutia,
  • Jayanta Kumar Nath,
  • Chakshu Gupta,
  • Dandadhar Sarma

摘要

Devario devario (Bengal danio), a vibrant freshwater cyprinid with ornamental value, lacks established captive breeding protocols, limiting sustainable aquaculture development. This study presents the first hormone-induced breeding protocol and embryological timeline for D. devario. Seventy-five mature individuals were subjected to breeding trials using varying OVASIS hormone concentrations (0–2.0 ml/kg). Treatment 3 (1.5 ml/kg females, 1.0 ml/kg males) yielded optimal: 6.42-hour latency, 90% spawning success, 85% fertilization, and 90% hatching success. Fertilized eggs measured 0.6 ± 0.3 mm diameter, were transparent, weakly adhesive to substrate, and demersal. Complete embryonic development occurred within 20.0 h, producing larvae measuring 3.46 ± 0.4 mm. This represents accelerated development compared to related species: Devario aequipinnatus (35–36 h) and Danio dangila (68–72 h), demonstrating superior breeding efficiency. The established protocol enables sustainable production, reducing pressure on wild populations while supporting aquaculture industry growth.