Vision of Fish - University of Vermont

Vision of Fish - University of Vermont

Vision of Fish www.yahoo.com By Andrew McDonald Outline

Introduction Challenges of water Absorption of light Refraction of light Anatomy of eye Light regulation Jim Lavarakas Introduction Optics : the collection of light and formation of an

image by the lens www.haroldcheck.com www.yahoo.com Accommodation : focusing of images on the retina Eyes of Fish www.yahoo.com

www.ebiomedia.com Much like human eyes But no eye lids Many sizes and colors Anatomy of Eye

Sclera Cornea Lens Iris Retina Optic nerve Powerful Eyes

Spherical lens High refractive power www.appstate.edu High quality Receptors: cones and rods www.yahoo.com Problems With Seeing Under Water Suspended

particles Light refraction www.yahoo.com Light absorption www.yahoo.com www.yahoo.com

Suspended Particles Sediments Microorganisms Plant growth Fast-moving water

www.hurleywi.com/ what_to_do/default.asp Light Absorption The dimming of light as it passes through water Red wavelengths absorbed rapidly Blue wavelengths absorbed slowly www.rainbows.com

Deep ocean is blue www.google.com Light Refraction Cone of Vision Water bends 48.6 degrees Freshwater pools Snells window Snells window

Light Regulation To limit light Iris contraction Smaller eyes Migration of visual cells Cornea filter pigments Swim away from light

Light Regulation For more light: Walleye Mirrors in back of eye Larger eyes Swim toward light www.google.com Conclusion

Some similarities w/ humans Different environments More obstacles More diverse Altered behaviors

Recently Viewed Presentations

  • Introduction to Adaptive Design Scientific Working Group ...

    Introduction to Adaptive Design Scientific Working Group ...

    Yi Liu . Director, NektarTheapeutics. 8 years in Takeda leading methodology group . PhD of Statistics from The Ohio State University. Research interest: innovative and efficient trial designs for early phases as well as late phases including adaptive randomization, sample...
  • Sikhi & Western Philosophy/Science Science without religion is

    Sikhi & Western Philosophy/Science Science without religion is

    "If one can't explain that it's just blackboard work." In the 15th century, Guru Nanak established Sikhism, the first religion to advocate emphatically the equality of all people, especially women. In a continent characterised by severe degradation of women, this...
  • Chapter 60

    Chapter 60

    Semi-Fowler's position. Analgesics. No laxatives or enemas. No heat. PROVIDE COMFORT TOUCH AND REASSURANCE! Surgical Management. Laparoscopy or laparotomy to rule out appendicitis. Preoperative care as for general anesthesia surgeries. ... Chapter 60 Last modified by:
  • Chapter 35 The End of the Cold War and the Shape of a New Era ...

    Chapter 35 The End of the Cold War and the Shape of a New Era ...

    Iraq: accused of amassing weapons of mass destruction; evidence proved largely erroneous Afghanistan: attack topples Islamic fundamentalist regime that harbored Al Qaeda Define glasnost and perestroika In general, why do many large Eastern European countries break up during the 1980s...
  • Grades of Meat

    Grades of Meat

    Chapter 6 Meat, Poultry, and Seafood
  • Nerve activates contraction

    Nerve activates contraction

    a. Multiple copies of alleles or genes (gene duplication) may provide new phenotypes. 1. 1. A heterozygote may be a more advantageous genotype than a homozygote under particular conditions, since with two different alleles, the organism has two forms of...
  • "Amendments 1-10, The Bill of Rights" Text p. 286-288

    "Amendments 1-10, The Bill of Rights" Text p. 286-288

    - Montesquieu (Mon-Teh-Skew) felt the best way to guarantee a government does not take away the natural rights of its citizens is to limit the power of government by dividing it into branches (part or section). ... Proposed by James...
  • MSDS - Socorro Independent School District

    MSDS - Socorro Independent School District

    3. Draw the NFPA diamond and fill in the appropriate NFPA hazard coding colors and numbers. 4. What does MSDS stand for? 5. What information do the chemical hazard label and MSDS have in common? 6. Why should an individual...