Direct production of monosex populations by administration of

Direct production of monosex populations by administration of anabolic steroids. 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 50% ♀ XY ♂ XX ♀ x YY super ♂ 100% XY ♂ 50% ♂ Fig. 5. 1. 2 KEEP YY SUPERMALES CULL

MEIOTIC GYNOGEN UV Egg SPB 2 N Sperm Shock Source: Tave, D; (1986) Fig. 5. 2. 1

MITOTIC GYNOGEN UV Egg SPB N Sperm 2 N N N Shock Fig. 5. 3. 1 Source: Tave, D; (1986)

ANDROGENESIS UV Egg SPB N Sperm 2 N N N Shock Fig. 5. 4. 1 Source: Tave, D; (1986)

Another way of getting Androgen Tetraploid Male 4 N UV Egg SPB 2 N gametes 2 N Sperm (2 N) Source: Tave, D; (1986) Fig. 5. 4. 2

TRIPLOIDY Egg SPB Sperm Shock Fig. 5. 5. 1 Source: Tave, D; (1986) 3 N

Another way of getting a TRIPLOIDY Tetraploid Female 4 N X gametes 2 N Diploid Male 2 N gametes N Offspring all 3 N Fig. 5. 5. 2 Source: Tave, D; (1986)

TETRAPLOIDY Egg SPB 2 N 2 N 2 N Sperm Shock 4 N Fig. 5. 6. 1 Source: Tave, D; (1986)