Fish reproduction
This presentation is the property of its rightful owner.
Sponsored Links
1 / 56

Fish Reproduction PowerPoint PPT Presentation


  • 66 Views
  • Uploaded on
  • Presentation posted in: General

Fish Reproduction. Spawning?. Egg Maturation Ovulation Spawning. Spawning?. Temperature. Photoperiod. Temperature. Pineal Gland. Photoperiod. Opening for pineal gland. Melatonin:. Regulates 24 hr cycle. Also changes skin pigmentation!. Weather. Substrate. Mate Availability &

Download Presentation

Fish Reproduction

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Fish reproduction

Fish Reproduction


Fish reproduction

Spawning?

Egg Maturation

Ovulation

Spawning


Fish reproduction

Spawning?

Temperature

Photoperiod


Fish reproduction

Temperature


Fish reproduction

Pineal Gland

Photoperiod


Fish reproduction

Opening for pineal gland


Fish reproduction

Melatonin:

Regulates 24 hr cycle.

Also changes skin pigmentation!


Fish reproduction

Weather


Fish reproduction

Substrate


Fish reproduction

Mate Availability

&

Pheromones


Fish reproduction

Mate Availability

Photoperiod

Temp

Weather

Pheromones

Health

Status

Spawning

Substrate

Availability


Goldfish 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


Fish reproduction

How Does the

Brain Get

the Word Out ?


Fish reproduction

Brain to Pituitary

Gonadotropin Hormone

Releasing Hormone

GNRH

Pituitary


Fish reproduction

Pituitary to Nads

Gonadotropin


Fish reproduction

Nads to Nads

Estrogen

Testosterone


Fish reproduction

Ovary to liver

Estrogen

Vitellogenin

= Yolk


Fish reproduction

Nads to Elsewhere

Testosterone


Fish reproduction

Secondary Characteristics


Fish reproduction

Eye Pineal Others...

Brain

GnRH

Pituitary

Gonadotropins

Ovary

Testes

Testosterone

Estrogen

Sperm development, Secondary sexual characteristics, Spawning Behavior


Fish reproduction

Immature

Sperm


Fish reproduction

Glandular

Epithelium


Fish reproduction

Swordfish sperm packets in various stages of development


Fish reproduction

Sperm

Heads

Flagella


Fish reproduction

Gonopodium


Fish reproduction

Meanwhile,

back in the

ovary...


Fish reproduction

Eye Pineal Others...

Brain

GnRH

Pituitary

Gonadotropins

Ovary

Testes

Testosterone

Estrogen

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


Fish reproduction

Yolk

Shell

Follicle


Fish reproduction

Artificial

Spawning

Induction


Fish reproduction

Eye Pineal Others...

Brain

GnRH

Pituitary

Yolk

Protein

Gonadotropins

Ovary

Testes

Estrogen

Testosterone

Liver

Secondary Sexual Characteristics


Fish reproduction

Eye Pineal Others...

Brain

GnRH

Pituitary

Yolk

Protein

Gonadotropins

Ovary

Testes

Estrogen

Testosterone

Liver

Secondary Sexual Characteristics


Fish reproduction

Mate Availability

Photoperiod

Temp

Weather

Pheromones

Health

Status

Spawning

Substrate

Availability


Fish reproduction

Eye Pineal Others...

Brain

GnRH

Pituitary

Yolk

Protein

Gonadotropins

Ovary

Testes

Estrogen

Testosterone

Liver

Secondary Sexual Characteristics


Fish reproduction

GNRH

Leutenizing Hormone

Releasing Hormone

LHRH


Fish reproduction

Eye Pineal Others...

Brain

GnRH

Pituitary

Yolk

Protein

Gonadotropins

Ovary

Testes

Estrogen

Testosterone

Liver

Secondary Sexual Characteristics


Fish reproduction

Dried

Pituitary

Too many hormones !


Fish reproduction

Gonadotropin


Fish reproduction

Human Chorionic

Gonadotropin

HCG


Fish reproduction

Eye Pineal Others...

Brain

GnRH

Pituitary

Yolk

Protein

Gonadotropins

Ovary

Testes

Estrogen

Testosterone

Liver

Secondary Sexual Characteristics


Fish reproduction

Eye Pineal Others...

Too

Late!

Brain

GnRH

Pituitary

Yolk

Protein

Gonadotropins

Ovary

Testes

Estrogen

Testosterone

Liver

Secondary Sexual Characteristics


Induced spawning

Induced Spawning

  • Temp, photoperiod, other cues

  • LHRH

    • Replaces GnRH

  • Gonadotropin from dried pituitary

    • Clumsy!

  • Human Chorionic Gonadotropin (HCG)

    • Replaces gonadotropin

  • Hormones only finish egg development and spawning


  • Login