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The behavior of living beings is modified to the beat of climate change. And of course there is a lot of truth in this, since a water that does not finish cooling even well into May does not seem a good omen for a species that loves cool environments like silversides. This species seems to go against the calendar with its late ascent to the Uruguay River, a classic route in its reproductive migration that usually gives the season's start bell, even long before the species establishes itself on the Buenos Aires side of the Río de la Plata. It…