Effect of Density at Harvest on the Growth Performance and Profitability of Hatchery‐reared Spotted Rose Snapper, Lutjanus guttatus, Cultured in Floating Net Cages

Abstract

This study evaluated the effect of the density at harvest on the performance and profitability of hatchery‐reared spotted rose snapper cultured in cages. The fish were stocked at harvest densities of 15, 20, and 22 kg/m3 in cages of 222 and 286 m3. More than 39,000 snapper fingerlings with an initial weight of 14 g were stocked. The fish were fed an extruded diet and cultured over a 360 d period. The thermal growth coefficient ranged from 0.04 to 0.05 and survival was 95% for all treatments, with the highest final weight (436.8 g) observed for fish reared at a density of 20 kg/m3. The allometric value b indicated that hatchery‐raised, cage‐cultured snapper were heavier than their wild counterparts. The major costs were feed (ranging from 44.7–45.9%), labor (22.4–32.6%), and seed costs (20.2–26.1%). The total production cost ranged from US$ 6.5 to US$ 7.5/kg. The baseline scenario was not economically feasible. However, a 10% increase in the sales price resulted in increases in the internal rate of return (183%) and net present value (US$ 97,628.9). These results suggest that L. guttatus has the potential for commercial production in cages.

Helminth parasite communities of spotted rose snapper Lutjanus guttatus from the Mexican Pacific

“…In Mexico, L. guttatus is one of the most economically important fi sh species, which has caused its exploitation above optimum levels (Amezcua et al, 2006). In addition, this fi sh is considered as one of the best candidates for commercial aquaculture in the region (Alvarez-Lajonchère et al, 2012;Hernández et al, 2016). As far as we are aware 16 species of helminths (Anisakis sp., Hamacredium lariosi, Helicometrina nimia, Lecithochirium microstomum, Maculifer japonicus, Microcotyloides incisa, Neobivagina aniversaria, Polycryptocylis leonilae, Polymicrocotyle manteri, Pseudoterranova sp., Siphodera vinaledwardesii, Euryhaliotrema mehen, E. perezponcei, Haliotrematoides guttati, H. plectridium and H. spinatus) are known from L. guttatus Pérez-Ponce de León et al, 1999;García-Vargas et al, 2008;Soler-Jímenez & Fajer-Ávila, 2012;Soler-Jímenez et al, 2012).…”

Evaluation of two mix cultures of white shrimp (Litopenaeus vannamei) with red tilapia hybrid and spotted rose snapper (Lutjanus guttatus) in intensive indoor brackish water tanks

“…In general, it was observed that when feed was provided for tilapia and snapper in a mix-culture system, competition for food was apparently negligible coinciding with Simão et al (2013), who found that shrimp and tilapia FCR reared in tanks was not affected in mix-culture, even at high density, and with high tilapia ratio (Yuan et al, 2010). ) by Hernández et al (2015) and Hernández et al (2016), respectively, but similar to the reported by Alcala-Carrillo et al (2016) in close recirculating system (mean 1.3% d -1…”

Global Aquaculture 2050

“…Thus, fewer inputs/resources will need to be used per ton of production, and costs per ton of product will decrease. Recent examples of efficiency‐enhancing aquaculture technologies published in JWAS include: Hernández et al (), Huang et al (), and Kumar et al ().…”