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Effect of the interaction between body weight and temperature on growth and maximum daily food intake in sharpsnout sea bream (Diplodus puntazzo)
García García, B.; Cerezo Valverde, J.; Aguado-Giménez, F.; García García, J.; Hernández, M.D. (2011). Effect of the interaction between body weight and temperature on growth and maximum daily food intake in sharpsnout sea bream (Diplodus puntazzo). Aquacult. Int. 19(1): 131-141. https://hdl.handle.net/10.1007/s10499-010-9347-2
In: Aquaculture International. Springer: London. ISSN 0967-6120, more
Peer reviewed article  

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Keywords
    Body weight; Food intake; Growth rate; Temperature effects; Diplodus puntazzo (Walbaum, 1792) [WoRMS]; MED, Spain, Murcia [Marine Regions]; Marine
Author keywords
    Body weight; Feed efficiency; Food intake; Growth equations; Optimaltemperature; Multiple regression analysis; Mediterranean Sea; Diploduspuntazzo

Authors  Top 
  • García García, B.
  • Cerezo Valverde, J.
  • Aguado-Giménez, F.
  • García García, J.
  • Hernández, M.D.

Abstract
    In experimental culture conditions in tanks, the effect of weight (W: 11-452 g) and temperature (T: 14-29 degrees C) on the growth rate (SGR, % bw day(-1)) and maximum daily food intake (SFR, % bw day(-1)) in sharpsnout sea bream (Diplodus puntazzo) was studied. The possible combined effect of both independent variables (W and T) was also analyzed by multiple regression analysis, fitting the data to the equation Ln Y = Ln a + b Ln W + cT + dT(2) + eT Ln W. Both SGR and SFR, and therefore feed efficiency (FE = SGR/SFR), were significantly influenced by the interaction between temperature and weight and may be expressed by means of the following equations: Ln SGR = -6.1705 + 0.5809T - 0.0087T(2) - 0.0249T Ln W (R(adj)(2) = 0.949; ANOVA P < 0.0001); Ln SFR = -4.8257 + 0.4425T - 0.0063T(2) - 0.0163T Ln W (R(adj)(2) = 0.964; ANOVA P < 0.0001). The results suggest that the optimum temperature for SGR and FE (T(SGRopt) and T(FEopt)), and the temperature at which the maximum SFR (T(SFRmax)) is reached, decreases with body weight, in accordance with the equations: T(SGRopt) = 33.297 - 1.435 Ln W; T(FEopt) = 29.332 - 1.890 Ln W; and T(SFRmax) = 34.941 - 1.304 Ln W, respectively. In this way, T(SGRopt) is 28.4, 26.7, and 24.7 degrees C; T(SFRmax) is 30.5, 28.9, and 27.1 degrees C and T(FEopt) is 22.9, 20.6, and 18 degrees C for 30, 100 and 400 g body weight, respectively.

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