NANFA-- Salt to fresh
Tue, 6 Aug 2002 19:24:21 EDT

I just started an experiment in converting marine fish to freshwater that so
far seems to have worked out. I caught three tongue soles from the cape fear
river, salinity 1.015. Over the course of about a week I slowly dropped the
salinity to 1.000. So far they are doing well and eating frozen bloodworms. I
also caught a bass like fish that I haven't identified yet, it also made the
transition and is eating well. I have long suspected that local tongue soles
might tolerate freshwater due to catching them in very low salinity the water
they are in is fresh but hard, I suspect that high calcium content might
allow these fish to better tolerate freshwater. I have kept many local marine
fish in freshwater from time to time after catching them in very low salinity
water. Many of the local fish travel back and forth between fresh and salt in
the local estuary environment.

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