1 / 39

Bird Ovaries: Developing Ova inside Follicle

Bird Ovaries: Developing Ova inside Follicle. Oogenesis Ovum (Gamete) Production. (Meiosis Partially Completed at Birth). Follicle Maturation. Primary Oocytes: 500 - 2000. Follicle Containing Egg (= Ovum). http://www.hiltonpond.org/images/VultureBlackOvum01.jpg. Follicle Maturation.

kacia
Download Presentation

Bird Ovaries: Developing Ova inside Follicle

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Bird Ovaries: Developing Ova inside Follicle

  2. Oogenesis Ovum (Gamete) Production (Meiosis Partially Completed at Birth)

  3. Follicle Maturation Primary Oocytes: 500 - 2000 Follicle Containing Egg (= Ovum) http://www.hiltonpond.org/images/VultureBlackOvum01.jpg

  4. Follicle Maturation Timeframe Passerines: 4-5 Days Ducks/Pigeons: 6-8 Days Penguins: 6-8 Days Enlargement Up to 1000X Initial Size Egg (Ovum) http://www.hiltonpond.org/images/VultureBlackOvum01.jpg

  5. Follicle Maturation: Yolk Contents of Ovum Materials • Nutrition (Proteins, Lipids) • Hormones (e.g., Testosterone) • Immune Factors (e.g., Carotenoids, • Immunoglobins) • Antioxidants (e.g., Carotenoids, • a Vitamin A precursor)

  6. Follicle Maturation: Yolk Anatomy of Ovum Vitelline Membrane Yellow Yolk (Day Deposition) White Yolk (Night Deposition) (Germ Spot) Central Latebra (contains clear Vitelline Fluid)

  7. Follicle Maturation: Yolk Content in Altricial versus Precocial Birds Altricial: Precocial: Fig. 14-14 in Gill 2007

  8. Follicle Maturation: Mature and Atretic Follicles Stigma of Maturing Follicle Atretic Follicles http://partnersah.vet.cornell.edu/avian-atlas/sites/agilestaging.library.cornell.edu.avian-atlas/files/avian_atlas_assets/3.4.08.2DSC00050%20x750.jpg

  9. Ovulation Clutch

  10. Fertilization

  11. Sex Determination: Birds vs. Mammals

  12. Gynandromorphs

  13. Egg Development: Magnum (Albumin and Chalaza Deposition)

  14. Egg Development: Magnum (Albumin and Chalazae Deposition) Albumin Composition: Water (90%) Protein (10%) Function: Water Supply Shock Absorption Insulation “Egg Whites”

  15. Egg Development: Magnum 1) Chalazal Albumin (Dense) 2) Inner Albumin (Watery) 3) Fibrous Albumin (Viscous) 4) Outer Albumin (Watery) Chalaza – Twisted, Ropy Albumin

  16. Egg Development: Isthmus (Additional Albumin, Shell Membrane (2) Deposition)

  17. Egg Development: Isthmus (Additional Albumin, Outer and Inner Shell Membrane Deposition) Outer Shell Membrane Inner Shell Membrane (Air Space)

  18. Egg Development: Uterus (with Shell Gland)

  19. Egg Development: Uterus (with Shell Gland) Function • Additional Albumin • Shell • Pigments Papillae Fig. 8-76 in Podulka et al. 2004

  20. Egg Development: Uterus (with Shell Gland) (Cuticle, Calcite Crystals, Pore, Shell Membranes, Chorioallantoic Membrane) Fig. 8-66 in Podulka et al. 2004

  21. Egg Development: Uterus (with Shell Gland) (Consequences of Shell Porosity) DDT

  22. Egg Development: Consequences of Egg Shell Porosity

  23. Embryo Development: Yolk Sac and 3 Extra-Embryonic Membranes 2) Allantoic Sac 3) Amnion 3) Chorion Yolk Sac

  24. Egg Development: Shell Gland (Uterus) (Egg Color: Among Species Variation)

  25. Egg Development: Shell Gland (Uterus) (Egg Markings: Among Species Variation) Spotted Streaked 24 25

  26. Egg Development: Shell Gland (Uterus) (Egg Markings: Among Species Variation) Fig. 8-76 in Podulka et al. 2003

  27. Egg Development: Shell Gland (Uterus) (Egg Color and Markings: Among Species Variation)

  28. Egg Development: Shell Gland (Uterus) (Egg Color: Within Species Variation) Common Murre Individual Egg Recognition in Colonies (Common Murres only accepts eggs colored like its own)

  29. Egg Development: Shell Gland (Uterus) (Egg Markings and Shape – Within Clutch Variation) (Adaptive Value?) American Crow Clutch

  30. Egg Development: Shell Gland (Uterus) (Egg Color: Within Species Variation in “Egg-Dumping” Birds) Female 1 Female 2 Female 3 Northern Masked-Weaver

  31. Egg Expulsion: Vagina and Cloaca Fig. 4-111 in Podulka et al. 2004

  32. Egg Laying • Many Birds (e.g., Passerines, Woodpeckers) Lay Eggs about • 24 Hours Apart • Some Birds Lay their Eggs Two Days Apart (Ostrich, Herons, • Doves, Owls, Hummingbirds, Swifts, Kingfishers, • Some Accipiters • Penguins Lay their Eggs Three to Six Days Apart • Kiwis lay their Eggs 14-30 Days Apart

  33. Egg Size

  34. Egg Size: Among Species Variation Fig. 8-69 in Podulka et al. 2003

  35. Egg Size: Among Species Variation (Precocious versus Altricial Birds) Fig. 8-71 in Podulka et al. 2003

  36. Egg Shape : Among Species Variation Fig. 8-72 in Podulka et al. 2003

  37. Egg Shape : Among Species Variation Nomenclature Fig. 8-72 in Podulka et al. 2003

  38. Egg Shape – Adaptive Value of Shape Common Murre Pyriform Shape Adaptive, But NOT FOUND in other Cliff Nesters Fig. 8-73 in Podulka et al. 2004

  39. Swift’s Mating 28

More Related