Abstract

VASQUEZ - PINEROS, Mónica A.; GOMEZ - B, David A.; RAMIREZ - DUARTE, Wilson F.  and  ESLAVA - MOCHA, Pedro R.. Optimal concentration of low cost substances to improve transportation of two ornamental fish species. Orinoquia [online]. 2012, vol.16, suppl.1, pp.187-202. ISSN 0121-3709.

In order to improve the quality of transport of two ornamental fish species of economic interest in the region of the Orinoco, Paracheirodon axelrodi and Otocinclus sp., the effect of different concentrations of low cost substances: eugenol (0.25 and 0.5 mg/L), sodium cloride (0.5, 1.5 and 2.5 g/L) and calcium carbonate (0.1, 0.5 and 1 g/L) by two periods Adiof transport (12 and 24 h), was evaluated on the water quality, ion loss to the water, resistance to hyperosmotic stress and survival after transport and 7 days later. As a result the addition of 0.5 mg/L of eugenol showed improved survival in 7 days after transport and a decreased ion loss to water in Otocinclus sp. It also reduced ammonium after 24 h transport in P. axelrodi. Additionally, the addition of 1.5 g/L salt was effective to improve survival after unpacking and after 7 days in both species, and greater resistance to hyperosmotic exposure in P. axelrodi. Finally, 0.1 g/L of calcium carbonate gave a higher resistance to hyperosmotic stress (P. axelrodi) and a better survival for both species, despite its poor solubility. It can be concluded that the three substances used in appropriate concentrations can improve the quality of transport, being the salt the substance with most beneficial effects on survival and stress resistance.

Keywords : Otocinclus sp; Paracheirodon alxerodi; eugenol; salt; calcium carbonate.

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