Details

Autor(en) / Beteiligte

• Hernández, C
• Ibarra-Castro, L
• Hernández, C. H
• Quintero-Martínez, G
• Aragón-Noriega, E. A
• Tacon, A. G

Titel

Growth Performance of Spotted Rose Snapper in Floating Cages and Continuous Water-Flow Tank Systems

Ist Teil von

• North American journal of aquaculture, 2015-01, Vol.77 (4), p.423-428

Ort / Verlag

Taylor & Francis

Erscheinungsjahr

2015

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• Growth performance of hatchery-reared Spotted Rose Snapper Lutjanus guttatus reared at two culture systems were studied, discussed and compared. We stocked 150 juveniles (mean, 124 g) into each of three floating cages and three onshore tanks (3 m ³) supplied with seawater of similar temperature (range 23–29°C). Fish were fed twice daily with an extruded diet containing 50% crude protein and 12% crude lipid. The survival rate was above 90%. After 120 d, the mean weight at harvest was 30% greater among fish reared in cages (337 g) versus tanks (255 g). The final feed conversion (1.44 for cages and 1.48 for tanks) differed between the culture systems. Growth in weight was described by the following exponential equations: W = 132.23 e ⁰.⁰⁰⁷⁹ᵗ, R ² = 0.98 for cages and W = 129.50 e ⁰.⁰⁰⁵⁸ᵗ, R ² = 0.99 for tanks. The residual sum of squares analysis indicated that these curves were different. The exponents (b) of the length–weight relationship calculated for cages (3.03) versus tanks (3.00) demonstrated that cultured Spotted Rose Snapper have a higher condition factor than do their wild counterparts, and those raised in cages show better growth than do those raised in tanks.