Open AccessEffects of prolonged reduction of dissolved O2 concentrations on growth of turbot (Psetta maxima) juveniles.
Author(s) -
Domingues Pedro,
Hernandez Jorge,
Cal Rosa
Publication year - 2016
Publication title -
frontiers in marine science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.558
H-Index - 49
ISSN - 2296-7745
DOI - 10.3389/conf.fmars.2016.05.00210
Subject(s) - turbot , juvenile , zoology , aquaculture , oxygen , biology , flatfish , fishery , chemistry , ecology , fish <actinopterygii> , organic chemistry
The knowledge of oxygen availability and consumption is one of the prerequisites for the development of aquatic systems (Brown et al., (1984), since low levels of available oxygen impose limitations on aquatic poikilotherms (Fernandez and Rantin, 1989). The effect of a prolonged (21 days) decrease in dissolved oxygen was compared on growth of juvenile turbot (Petssa maxima). Turbot (Psetta maxima) is a flatfish that has been cultured for many years in commercial aquaculture. Since this species is usually cultured at high densities, up to 40 Kg m-2 (Martinez-Tapia and Fernandez Pato, 1991), the effects of lower dissolved oxygen concentrations are an important factor for the optimization of commercial scale aquaculture. Initial weight of turbot was of 10,6±1,3 g; at the end of the 21 days experiment, juvenile turbot exposed to a lower dissolved oxygen concentration grew less (15,9±0,5 g) compared to those cultured at normal concentrations (17,8±0,6 g) (p<0.05)