Originally Posted By: JKB
Originally Posted By: BobbyRice
Certain fish have this internal ability, Salmon is a prime exaple. King salmon live in the pacific ocean, Yet you can catch all you want in lake Michigan. Its usually part of the life cycle to be in fresh water at some stage of life, but if land locked they can not get to the salty water and just eat and grow. They can not complete the life cylce and reproduce as they need the salt water for that. So they will be like HSB, put and take.....lots of coastal fish have this ability but seems to not have been explored very much. little differant than salmon, they hatch in salt water migrate to brackish and fresh water estuaries as juviniles and once mature move out to larger more salty water again. In the St johns river certain salt water fish (even adults) can be found all the way down to orlando area around the head water of the river.

see the salinity tolerance range on the southern flounder here. 0- 35 ‰
http://www.sms.si.edu/IRLSpec/Parali_lethos.htm


FYI on Michigan King (Chinook) Salmon life cycle. They spend their entire life in fresh water and there is significant reproduction without ever heading out to sea. Suggested that recent surveys had wild spawn at 50% of the population.


Michigan Sea Grant has quite a few cool videos.



From MI Sea Grant about the above video.
This raw underwater video footage was taken in the South Branch of the Black River in Van Buren County, Michigan. The water was cloudy from early October rains and Chinook salmon were preparing to spawn.

The first fish in the video is a male. The female, or hen, seen later in the video is preparing her redd by fanning her tail to clean fine particles of sand and silt from the gravel and cobble where she will deposit and bury her eggs. The flow of the current through the clean gravel will keep her eggs aerated through the winter months.

They don't get as big as their sea run cousins, but a 40lb King is a blast to catch.


Interesting, I thought they stocked all of the salmom. I wonder why they dont get as big though...

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