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Skin

Skin. It's all about Protection. Senses Touch, taste, smell, electric, lateral line Basic Anatomy Disease Resistance Defense (mucus) Defense (scales) Defense (poisons) Osmoregulation Colors and Camo Light. Senses Touch, taste, smell, electric, lateral line Basic Anatomy

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Skin

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  1. Skin It's all about Protection

  2. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  3. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  4. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  5. Alarm Substance Fat Cell Catfish Skin Collagen Fibers Epithelial Cell Muscle Goblet Cell Epidermis Dermis Fat Tissue Muscle

  6. Catfish Skin Alarm Substance Cell Taste Bud Epidermis Dermis

  7. Catfish Skin Goblet Cell Taste Bud Alarm Substance Cell

  8. Scale Fat Cell Scaly Skin Collagen Fibers Epithelial Cell Muscle Goblet Cell Epidermis Dermis Fat Tissue Muscle

  9. Skin with Scales Goblet Cell Scale Epidermis Dermis Fat Muscle

  10. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  11. Mucus • Disease resistance • Gooey glycoproteins • Stream from skin • Hard for pathogens to attach • Lysozyme: Dissolves bacterial cell walls • Histones: Antibacterial • Antibodies: Block specific pathogens

  12. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  13. Mucus • Disease resistance • Gooey glycoproteins • Stream from skin • Hard for pathogens to attach • Lysozyme: Dissolves bacterial cell walls • Histones: Antibacterial • Antibodies: Block specific pathogens • Defense • Nemo! • Hagfish - goo • Trunkfish

  14. Clownfish

  15. Hagfish

  16. Ostrcitoxin: A choline chloride ester of palmitic acid. The toxin has a minimum lethal concentration of 2 ppm and an LC50 of 3.5 ppm using mosquito fish as the test organism.

  17. Mucus • Disease resistance • Gooey glycoproteins • Stream from skin • Hard for pathogens to attach • Lysozyme: Dissolves bacterial cell walls • Histones: Antibacterial • Antibodies: Block specific pathogens • Defense • Nemo! • Hagfish • Toxins* • Baby food

  18. Mucus • Disease resistance • Gooey glycoproteins • Stream from skin • Hard for pathogens to attach • Lysozyme: Dissolves bacterial cell walls • Histones: Antibacterial • Antibodies: Block specific pathogens • Defense • Nemo! • Hagfish • Trunkfish • Baby food • Communication

  19. Alarm Substance CellsTop view of catfish epidermis

  20. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  21. Cycloid Scale

  22. Ctenoid Scale

  23. Ganoid Scales One scale: Dark green is the hard external part of the scale. Light green is under the skin Ganoid scales on gar skin

  24. Placoid Scales

  25. Placoid Scales One placoid scale: Dark green is the external part. Enamel Dentine Internal anatomy of a placoid scale. Pulp Epidermis Dermis

  26. Real Armor

  27. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  28. Poison Glands at Fin Base

  29. E. Velvetfish spine F. Scorpionfish spine H. Stonefish spine with glands I. Toadfish opercular spine

  30. What is the most common venomous fish in Arkansas?

  31. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  32. FW Fish Water In Salt Out

  33. Ocean Fish Salt In Water Out

  34. Senses • Touch, taste, smell, electric, lateral line • Basic Anatomy • Disease Resistance • Defense (mucus) • Defense (scales) • Defense (poisons) • Osmoregulation • Colors and Camo • Light

  35. Chromatophores Cells that carry pigments • Actual Pigments • Xanthophores – Yellow • Erythrophores – Red • Cyanophores -Blue • Melanophores – Brown & Black • Leucophores – White (purines)

  36. Xanthophores

  37. Xanthophores

  38. Erythrophores

  39. Cyanophores

  40. Bass Melanophores

  41. Melanosomes dispersed in melanocyte. The fish has dark color. The melanosomes are aggregated. The fish looks light.

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