Thursday, May 23, 2013

More about cartilaginous fish

Cartilaginous and bony fish regulate the salt found in water by:
Fish- drink a lot of seawater for hydration and excrete the concentrated salt through their gills and gut
Sharks- Reabsorb the area by the breakdown of protien back into their tissue

Sharks have developed a life strategy that requires slow growth to a relatively large size, while fish demonstrate rapid growth and reach maturity faster

Shark reproduction is internal. They have pelvic claspers that serve as the sperm conducting structure for internal fertilization.



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