Hybrid Recruitment Models
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¥R = E*e-(m1*t1 + m2*t2 +m3*t3) 
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¥Where, R is number of recruits, E is initial number of eggs spawned, and m1 is randomly generated mortality over the egg and larval period t1, with a low or high range of mortality estimates that depends on environmental conditions.  Late larval mortality rate, m2, is density dependent over the period t2.  Juvenile mortality, m3, is density dependent on potential large predators over the period t3.