Revista de Biología Tropical ISSN Impreso: 0034-7744 ISSN electrónico: 2215-2075

OAI: https://revistas.ucr.ac.cr/index.php/rbt/oai
Evaluation of marking efficiency of different alizarin red S concentrations on body fish structures in <i>Oreochromis niloticus</i> (Perciformes: Cichlidae) juveniles
PDF

Keywords

dye
tilapia
fish stocking
chemical mark stock enhancement
alizarin red
pigmento
tilapia
siembra de peces
marcaje químico
mejoramiento pesquero

How to Cite

Ibáñez, A. L., Rodríguez Canto, A., Cortés Martínez, J., & García Calderón, J. L. (2013). Evaluation of marking efficiency of different alizarin red S concentrations on body fish structures in <i>Oreochromis niloticus</i> (Perciformes: Cichlidae) juveniles. Revista De Biología Tropical, 61(1), 193–201. https://doi.org/10.15517/rbt.v61i1.10946

Abstract

The use of alizarin red S (ARS) marked tilapias could provide valuable fisheries management information to evaluate fish stocking events and may facilitate aquaculture management practices. As a new technique in fishes, the aim of this study was to compare and evaluate the chemical marks produced in tilapia juveniles by ARS through two treatments: 1) 12 hours of immersion and 2) immersion after osmotic induction. This was analyzed at three concentrations: 50, 75 and 100mg/l, and in three structures: otoliths, fish scales and caudal fin rays of Oreochromis niloticus juveniles. After three culture months 80% of specimens were analyzed and significant differences (p<0.05) in mark intensity were detected between treatments for otoliths and fin rays, but not for fish scales. Significant differences between concentrations were found for the 12h immersion treatment, while no significant differences were detected with osmotic induction. Our results showed that marks appeared at all concentrations, and none of the concentrations produced weak marks. Osmotic induction had a greater mortality than the 12h immersion procedure. After eight culture months the rest of the specimens were analyzed and the mark permanence was observed in all cases. According to the present results we recommend the marking process of 12h immersion treatment at 100mg/L concentration.
https://doi.org/10.15517/rbt.v61i1.10946
PDF

Comments

Downloads

Download data is not yet available.