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  • Resource used :The Hutchinson Unabridged Encyclopedia with Atlas and Weather guideSend citation to EasyBibhttp://www.credoreference.com.ezproxy.hacc.edu/entry.do?id=9853476Email this entryPrint this entrySave this entryShare
  • http://www.accessscience.com.ezproxy.hacc.edu/content.aspx?searchStr=Dolphins+using+echolocation&id=122700#S1http://www.accessscience.com.ezproxy.hacc.edu/content.aspx?searchStr=echolocation+of+dolphins&id=YB000490 (echolocation)
  • http://www.accessscience.com.ezproxy.hacc.edu/content.aspx?searchStr=Dolphins+using+echolocation&id=122700http://www.oxfordreference.com.ezproxy.hacc.edu/views/ENTRY.html?entry=t313.e23&srn=5&ssid=120759019&authstatuscode=202#FIRSTHIThttp://www.credoreference.com.ezproxy.hacc.edu/entry.do?id=9853476
  • http://www.credoreference.com.ezproxy.hacc.edu/entry.do?id=9853476
  • http://www.credoreference.com.ezproxy.hacc.edu/entry/cabitrme/dolphinhttp://www.credoreference.com.ezproxy.hacc.edu/entry/cabitrme/welfare_of_captive_marine_wildlife

Dolphins2 Dolphins2 Presentation Transcript

  • Dolphins
    Anatomy, ecology, behavior and popularity
  • Some Background Info:
    There are about 60 different species of dolphin
    Dolphins cannot smile
    Trivia:
    The name dolphin is applied to species that have beaklike snout and slender body and the name porpoise is given to species that have blunt snouts and a stocky body.
    US military trained dolphins to detect mines in the Gulf
  • Anatomy
    Brain and Sense Organs
    Locomotion
    Feeding
  • Brain…and Sense Organs
    Brain is Large and Developed
  • Nose, Eyes, and Ears
    Almost no sense of smell
    Eyes are well developed
    Ears are most important sense
  • Communication
    Do not emit sounds with voice box
    Sounds pass through tissues of the head
    Sounds can travel hundreds of miles
    Fatty Organ: Melon
    Echolocation
  • Locomotion
    Swing tail through the water
    Forelimbs used for navigating
    Fins resemble flat oars (five fingers)
    Dorsal fin stabilizes body
  • Locomotion continued…
    Tail Fluke
    Body is efficient for locomotion
    Must come to the surface for air
    My0globin
  • Feeding
    Prong-like teeth
    Fish, Crustaceans, squid and mollusks
  • Behavior
  • Consciousness
    Aware of their own body image, thus able to copy human movements
    Recognize abstract images of the human body
    Possess self awareness
  • Dolphin at play…
  • Behavior continued…
    Can use tools both in captivity and in the wild
    Live in schools/sometimes composed of diff. species
    Cooperative Hunting
    Females have offspring every 3-6 yrs
    Reach 50 yrs of age
  • School of dolphins…
  • Ecology
  • Habitat
    Tropical/temperate oceans
    Freshwater
    Warm seas
  • Popularity
  • Held in Captivity
    Dolphins used in tourism
    Used for breeding, tricks, research etc
    Kept in sea pens, aquaria's
    Used in feeding programs or “swimming with the dolphins”
  • Welfare
    Capture can be stressful and dangerous
    Mortality rate increased 6 fold
    Do not live as long as their wild counterparts
    Behavior abnormalities due to captivity include:
    Aggressiveness, increased sexual behavior, self harming, and vomiting.
  • Welfare continued…
    Reasons for early death include:
    Physical injury, shock, ulcers, heat stroke etc
    Habitats designed to appeal to tourists and not to the animals needs
    Confined to small swimming pools
  • Dolphin in aquarium