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Fish Reproduction

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Page 1: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Fish Reproductio

n

Page 2: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 3: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Spawning?Spawning?

Egg MaturationOvulationSpawning

Page 4: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

TemperaturePhotoperiod

Spawning?Spawning?

Page 5: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

TemperatureTemperature

Page 6: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Pineal Gland

Photoperiod

Page 7: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Opening for pineal glandOpening for pineal glandOpening for pineal glandOpening for pineal gland

Page 8: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 9: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Weather Weather

Page 10: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

SubstrateSubstrate

Page 11: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 12: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 13: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 14: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Mate Availability&

Pheromones

Mate Availability&

Pheromones

Page 15: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 16: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 17: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 18: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

TempTempPhotoperiodPhotoperiod Mate AvailabilityMate Availability

SpawningSubstrateAvailability

SpawningSubstrateAvailability

HealthStatus

WeatherWeather

PheromonesPheromones

Page 19: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Goldfish Spawning

• Feed broodfish • Move to warm holding tanks• Use lights to lengthen photoperiod• Move to shallow spawning tanks• Add spawning mats• Increase depth to cover mats• Use some old water

Page 20: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 21: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Brain to PituitaryGonadotropin

HormoneReleasing Hormone

GNRH

Pituitary

Page 22: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Gonadotropin

Pituitary Pituitary to Nadsto Nads

Page 23: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

EstrogenTestosterone

Nads to Nads

Page 24: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Estrogen

Vitellogenin= YolkVitellogenin= Yolk

Ovary to liver

Page 25: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Testosterone

Nads to Elsewhere

Page 26: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 27: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 28: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 29: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 30: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 31: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 32: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

GnRH

Gonadotropins

Testosterone

Ovary

Estrogen

Sperm development, Secondary sexual characteristics, Spawning Behavior

Page 33: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

ImmatureSperm

Page 34: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

GlandularGlandularEpitheliumEpithelium

Page 35: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Swordfish sperm packets in various stages of development

Page 36: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Sperm Heads

Flagella

Page 37: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Gonopodium

Page 38: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 39: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 40: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 41: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

GnRH

Gonadotropins

Testosterone

Ovary

Estrogen

Secondary Sexual Characteristics, egg development, yolk production (liver), spawning behavior, ovulation

Page 42: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 43: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Yolk

Shell

Follicle

Page 44: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning
Page 45: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

Liver

GnRH

Gonadotropins

Testosterone

Ovary

YolkProtein

Estrogen

Secondary Sexual Characteristics

Page 46: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

Liver

GnRH

Gonadotropins

Testosterone

Ovary

YolkProtein

Estrogen

Secondary Sexual Characteristics

Page 47: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

TempTempPhotoperiodPhotoperiod Mate AvailabilityMate Availability

SpawningSubstrateAvailability

SpawningSubstrateAvailability

HealthStatus

WeatherWeather

PheromonesPheromones

Page 48: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

Liver

GnRH

Gonadotropins

Testosterone

Ovary

YolkProtein

Estrogen

Secondary Sexual Characteristics

Page 49: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Leutenizing HormoneReleasing Hormone

LHRH

GNRH

Page 50: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

Liver

GnRH

Gonadotropins

Testosterone

Ovary

YolkProtein

Estrogen

Secondary Sexual Characteristics

Page 51: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

DriedPituitary

Too many hormones !

Page 52: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Gonadotropin

Page 53: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Human ChorionicGonadotropin

HCG

Page 54: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

Liver

GnRH

Gonadotropins

Testosterone

Ovary

YolkProtein

Estrogen

Secondary Sexual Characteristics

Page 55: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Eye Pineal Others...

Brain

Pituitary

Testes

Liver

GnRH

Gonadotropins

Testosterone

Ovary

YolkProtein

Estrogen

Secondary Sexual Characteristics

Page 56: Fish Reproduction. Spawning? Egg Maturation Ovulation Spawning

Induced Spawning1. Temp, photoperiod, other cues2. LHRH

1. Replaces GnRH

3. Gonadotropin from dried pituitary1. Clumsy!

4. Human Chorionic Gonadotropin (HCG)

1. Replaces gonadotropin

5. Hormones only finish egg development and spawning

1. Temp, photoperiod, other cues2. LHRH

1. Replaces GnRH

3. Gonadotropin from dried pituitary1. Clumsy!

4. Human Chorionic Gonadotropin (HCG)

1. Replaces gonadotropin

5. Hormones only finish egg development and spawning


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