Evaluation of the aquaculture potential of Dormitator maculatus (Bloch, 1792) from the Alvarado lagoon, Veracruz, Mexico

Abstract

Objective: The naca fish, Dormitator maculatus, is a species which comercial importance is based exclusively on the extraction of the mature gonads of the females, which reach a high price in the regional market as a gourmet dish. However, there is scarce information regarding its biology.

Design/methodology/approach: Their aquaculture potential (survival and growth) was evaluated in a recirculation system, in which the response in captivity of stages of their life cycle (treatments) were tested: T1=fry (8.35±2,83 g), T2= juveniles (17.22±5,13 g) and T3= adults (25.55±6,05 g), in triplicate, for 90 days. Measurings were performed every 15 days, the diet supplied was a commercial balanced feed for tilapia 3.5 mm in diameter (GrowFish® Protein 35%, fat 5.5%), at 1.5% of the biomass which was positively accepted.

Results: At the end of the experiment, it was observed that Treatment 1 (fry) presented a greater survival and growth. This result may be related to the fact that the species is very resistant to environmental changes in its natural environment.

Limitations on study/implications: However, this growth was slow, which may be due to the fact that D. maculatus has a stationary diet

Findings/conclusions: The results encourage more studies on its cultivation, such as the influence of environmental conditions on reproduction, which would help to mitigate the pressure on natural populations.