Author:
Patti José,Valencia Zuhelen,Gaviria Juan
Abstract
The fish Parablennius marmoreus (Blenniidae) exhibits demersal spawning characterized by eggs adhering to solid surfaces and male parental care. This research describes the embryonic development under laboratory conditions of 12 spawns obtained in captivity at temperatures ranging from 27 ºC to 30 ºC. The first cell division (2 blastomeres) was observed at 50 minutes post-fertilization (PF). The eggs are smooth, light orange in color, with differentiated violet chromatophores. The chorion diameter measures 0.62±0.06 mm, and the granular yolk has a diameter of 0.45 ±0.08 mm. The blastula stage occurred at 11 hours and 40 minutes PF, and gastrula at 21 hours and 10 minutes PF. Embryo formation took place at 48 hours PF, and the larvae hatched at 135 hours PF, measuring 2.91±0.34 mm in length with a notochord and displaying 97 beats per minute. The captive reproduction and embryonic development of the blenny P. marmoreus are feasible and offer a solution to contribute to the conservation of species with ornamental interest.
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