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Unformatted text preview: much the way a ballast tank does on a submarine to control buoyancy. Salmon, trout, and eels can migrate from fresh water to salt water, but must adjust kidney and gill function to the tonicity of their environments. In freshwater, the fish is hyoptonic relative to its aqueous (watery) environment. Water is constantly flooding into the fish, and must be removed by the fish's excretory system . In seawater, the fish is now hypertonic or isotonic relative to the seawater, requiring conservation of body water. Bony fishes depend on color vision to detect both rivals and mates. Sperm and eggs are released into the water, with not much parental care for the newborn. Most fish have fertilization and embryonic development taking place outside the female's body....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.
- Fall '10