Abstract

MURCIA-ORDONEZ, B. et al. Fisiología reproductiva del pez Betta splendens en condiciones de laboratorio, Piedemonte Andino Amazónico (Colombia). Rev. vet. [online]. 2016, vol.27, n.2, pp.124-129. ISSN 1669-6840.

It was observed and described the reproductive strategies (courtship process, fecundation, fertilization and incubation) and the embryo development (zygote, morula, blastula, gastrula, and organogenesis hatching) in 100 fertilized eggs of Betta splendens under laboratory conditions (temperature 27.8°C, pH 6.8) at Universidad de la Amazonia (Florencia, Caquetá, Colombia), in order to get information that generates advantages for the production and marketing of this species. Toup View program 2.1 version was used to measure the morphological structures of 32 oocytes every 5 minutes until organogenesis and then every four hours until hatching. It was obtained a percentage of fertility spawns of 83±2.0 and elapsed time (from fertilization to hatching) of 36.13 h for this species. Germinal disc size was 529.39 μm with a radius of 5.64 μm and a yolk sac 679,43μm. The egg undergoes a series of rapid changes (±36 h) after fertilization generating embryonic development: segmentation (40 min), cycling (50 min), gastrulation (55 minutes), segmentation and organogenesis (16 min), morphogenesis (21 hours), hatching and larval stage (13 hours). It is concluded that B. splendens is a fish with a type of embryonic development fairly short (36.13 h) compared to the period presented in other teleost fish, data that will be useful for further studies related to the reproduction of this species for commercial purposes.

Keywords : fish Betta splendens; reproductive strategies; embryonic development.

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