EVALUATION Of SOLE (Solea senegalensis) pREfERENCES fOR DIffERENT SUBSTRATE TEXTURES AND COLOURS
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چکیده
Introduction Soles, as most of flatfishes, live in sandy bottoms in order to guarantee food availability and protection from predators (Kruuk, 1963). In commercial sole culture, the use of sand has been considered a serious obstacle to maintain hygienic conditions (Howell, 1997), but problems arise when they are kept on hard-bottomed tanks without sand. A higher occurrence of Black Patch Necrosis (BPN) (McVicar & White, 1979, 1982), a significant increase in metabolic rate (Howell & Canario, 1987), and even pigmentation abnormalities (Dinis et al 1999) have been attributed to sand deprivation.
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