There was no di.erence in survival or growth rate over 63 days for young‐of‐the‐year sea trout Salmo trutta in fresh and brackish Baltic Sea water (6·7 psu). Hence, such sea trout parr that migrate from the freshwater habitat in which they hatch to the Baltic coastal zone, without smolting, should experience little or no physiological cost in survival and growth.
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Peter Landergren (2001) studied this question.
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