Sex reversal, growth, and survival in the guppy Poecilia reticulata (Cyprinodontiformes: Poeciliidae) under laboratory conditions
DOI:
https://doi.org/10.22458/urj.v5i2.278Abstract
Just like it is important to obtain robust and heavy fish in short periods in aquaculture, in aquariology it is important to efficiently obtain colorful fish, which are usually males, and this makes sex reversal important. We studied sex reversal and growth for 120 days in 10-gallon tanks, without aeration, with densities of 1 fry per liter. Temperature varied between 28,2 and 28,7°C. The pH was 8,1 to 8,8 and oxygen concentration 6,2 to 6,8mg/l. Aba Api-balanced food with 25% protein was used and three different hormones were added to the treatments: 1) Sten 2) Primoteston and 3) Sostenon 250. Sex reversal in males was 85,0%, 92,5% and 80,0% respectively. Fishes with treatments 1 and 3 gained an average of 0,48g and 4,2cm (with treatment 2: 0,44g and 4cm). Survival was 85%, 92,5% and 80%; however, these differences were not significant. The three treatments gave the expected results of sex reversal, growth and survival.
KEY WORDS
Animal feed, population density, hormone supply, aquariums without aeration
References
Al-Amoundi, M. M. (1987). Acclimation of commercial cultured Orechromis species to seawater an experimental study. Aquacuture, 65, 333-345.
APT – Aquaculture Production Technology Ltd. (2012). Kiriat Bialik, Israel.
Bertalanffy L. von (1938). A quantitative theory of organic growth (Inquires on growth laws II). Human Biology, 10, 181-213.
Cabrera-B. T, Millán-Q. V., Rosas-C. V., & Rangel, V. (2001). Cultivo del híbrido de tilapia en ambiente marino, sustituyendo harinas de pescado por soya. INP. SAGARPA. México. Ciencia Pesquera, 15, 121-125.
FAO (2008). FAO Fisheries Technical Paper. No. 475. Rome, Italy
Gillett, R. (2008). Global study of shrimp fisheries. FAO Fisheries Technical Paper. No. 475. Rome, Italy.
Granados, A. I., Garduño, M., & Muñoz, C. (2002). Comparación de crecimiento y evaluación económica entre el genotipo de tilapia gris (Oreochromis niloticus) y el híbrido rojo (Oreochromis mossambicus x O. niloticus). Recuperada de http://www.ecologia.edu.mx/sigolfo/pagina_n2.htm.
Gutiérrez-Venegas, J. L. (2006). Reporte Técnico-Económico del Cultivo de Camarón en México. Industria Acuícola, 2(3), 10-13
Josupeit, H. (2010). World supply and demand of tilapia. FAO. Serial: GLOBEFISH Research Programme (FAO). Rome, Italy.
Martínez, P. X. (2008). Evaluación del policultivo de tilapia del Nilo (Oreochromis niloticus) y camarón blanco (Litopenaeus vannamei) en condiciones intensivas en una granja camaronera de baja salinidad. Aquaculture Reserch, 28, 829-839.
Mena-Herrera, A., Sumano-López, H., & Macias-Zamora, V. (2002). Efecto de la salinidad en el cecimiento de tilapia híbrida Oreochromis mossambicus (Peters) x Oreochromis niloticus (Linnaeus) cultivadas bajo condiciones de laboratorio. Veterinaria México, 33(1), 39-48.
Ortega-Salas, A. A., Castro, M. H., & Núñez-Pastén, A. (2005). Cultivo hiper-intensivo de camarón blanco en estanques de agua dulce. Segundo Foro Internacional de Acuicultura. 1- de Diciembre. Expo Forum, Hermosillo, Sonora, México.
Suresh, A.V. (1999). Recent advances in tilapia broodstock management. Procedings Acuiculture, 99, 17-20.
Saavedra, M. M. A. (2006). Managua, Nicaragua, 31 julio-4 agosto 2006., Recuperado en Pdf. usaid.gov/pdf_docs/PNADK649.pdf.
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