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Browsing by Author "Lenis Sucerquia, Gustavo Adolfo"

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    Efecto de la densidad de siembra sobre la larvicultura de guabina (rhamdia sebae c.f.) en sistema de recirculación.
    (Corporación Universitaria Lasallista, 2011-06-01) David Ruales, Carlos Arturo; Castañeda Álvarez, Germán David; Cruz Segura, Claudia Isabel; Lenis Sucerquia, Gustavo Adolfo; Castro Rojas, Juan David; Álvarez Vanegas, Miguel Augusto; Lidueña Arrieta, Neithan; Martínez Morales, Ever Segundo
    Abstract: Introduction. Larviculture phase is the most important stage in a fry production system. Most of native fish species have altricial larvae, which are known for their low development, and which require optimal conditions. Recirculation systems are a technological tool that is environmentally friendly and allows productivity and profitability increases in larviculture. Objective. To evaluate three containment densities and their effects on Rhamdia sebae larvae´s growth and survival in a re- circulation system. Materials and methods. “Guabina” (Rhamdia sebae) larvae with a posthatching period of 36 hours were used. They were seeded in three densities, 25, 50 and 75 larvae L-1 (T1, T2 y T3 respectively) in triplicate, in 80 litters containers, in a recirculation system. In the different treatments, the animals were fed for the first time and during a 17 days period with Artemia salina nauplii and concentrated food with a 35 % of brute protein. Results. At the end of the experiment, the results indicated significant differences (p<0.05) between the treatments concerning the weight gain and the survival. The best performance was that of T1 (21.72 ± 5.57 mg and 73.08 ± 14.51%, respectively), also including, for this treatment, the best specific growth rate (6,32%), followed by T2 (13 ± 5,14 mg and 44.33 ± 12.04%) and T3 (8.12 ± 3.38 mg and 38.92 ± 11.84%). Conclusion. The best seeding density in this kind of system was 25 L-1 larvae.
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    Reproducción inducida de la sabaleta Brycon henni: revisión bibliográfica
    (Corporación Universitaria Lasallista, 2015-08-24) Lenis Sucerquia, Gustavo Adolfo; Cruz Casallas, Pablo Emilio; David Ruales, Carlos Arturo
    “Sabaleta” fish, Brycon henni, is an endemic species from the mountain zones of Colombia, which adapts itself well to temperate and warm waters. Given its cultural importance in the life zones associated to its presence, several aspects of its biology, its ecology and confined reproduction have been being developed. Despite the fact this species is considered as promising for continental aquaculture, the research works about its induced reproduction reported until 2009 have not achieved satisfactory results. The most recent tests of reproduction in captivity are expected to contribute to the development of this species ´ cultivation.