The effect of salinity on spotting features of Salmo trutta abanticus, S. trutta fario and S. trutta labrax of cultured brown trout

Salmo trutta is one of the most important fish species due to its aquaculture potential, economic value and wide consumer demand and skin color is an important commercial trait in fish farming, given that this phenotype influences consumer acceptance, thereby determining the commercial value that fish can reach. Morphological differentiation can be due to two causes, genetic differences or environmental factors, or interaction between them. Environmental factors can produce phenotypic plasticity, which produce different phenotypes for the capacity of a genotype in different environmental conditions.