Direct production of monosex populations by administration of anabolic steroids. FRY FRY ANDROGENS ESTROGENS ALL MALES ALL FEMALES Fig. 5.1.1 Source: Tave, D; (1986) Schematic diagram of the protocol needed to produce YY supermales by creating sexreversed broodstock that are capable of producing all-male populations. FRY Source: Tave, D; (1986) ESTROGENS XX ♀ AND XY “♀” PROGENY TEST TO IDENTIFY XY “FEMALES” XX ♀ x XY “♀” XY ♂ x XY ♂ 25% XX ♀ 50% ♀ CULL 50% XY ♂ 50% ♂ 25% YY super ♂ CULL PROGENY TEST TO IDENTIFY YY SUPERMALES XX ♀ x XY ♂ 50% ♀ XX ♀ x YY super ♂ 100% XY ♂ 50% ♂ Fig. 5.1.2 KEEP YY SUPERMALES CULL MEIOTIC GYNOGEN UV Egg SPB 2N Sperm Shock Source: Tave, D; (1986) Fig. 5.2.1 MITOTIC GYNOGEN UV Egg SPB N Sperm 2N N N Shock Fig. 5.3.1 Source: Tave, D; (1986) ANDROGENESIS UV Egg SPB N Sperm 2N N N Shock Fig. 5.4.1 Source: Tave, D; (1986) Another way of getting Androgen Tetraploid Male 4N UV Egg SPB 2N gametes 2N Sperm (2N) Source: Tave, D; (1986) Fig. 5.4.2 TRIPLOIDY Egg SPB Sperm Shock Fig. 5.5.1 Source: Tave, D; (1986) 3N Another way of getting a TRIPLOIDY Tetraploid Female 4N X gametes 2N Diploid Male 2N gametes N Offspring all 3N Fig. 5.5.2 Source: Tave, D; (1986) TETRAPLOIDY Egg SPB 2N 2N 2N Sperm Shock 4N Fig. 5.6.1 Source: Tave, D; (1986)
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