Sharks And Rays by Tyler Korz https://padlet.com/tk481/rbyytw8sf3jn Chondrichthyes en-us 2018-05-29 15:03:55 UTC 2018-06-01 03:24:58 UTC hello@padlet.com Chondrichthyes Characteristics tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264283380
  • Gills allow sharks and rays to absorb oxygen in the water.
  • Rigid Dorsal Fins to stabilized their turns.
  • A skeleton of soft and flexible cartilage lined with hard tissue. 
  • Placoid scales which are the tiny tough scales that cover the skin.

    • ]]>     2018-05-29 15:11:44 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264283380     Great White Shark tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264556048 Kingdom:Animalia
    Phylum:Chordata
    Class:Chondrichthyes
    Order:Lamniformes
    Family:Lamnidae
    Genus:Carcharodon
    Species:Carcharias]]>     2018-05-30 15:10:13 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264556048     Giant Oceanic Manta Ray tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264557735 Kingdom:Animalia
    Phylum:Chordata
    Class:Chondrichthyes
    Order:Rajiformes
    Family:Myliobatidae
    Genus:Manta
    Species:Manta birostris]]>     2018-05-30 15:16:04 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264557735     Angelshark tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264558409 Kingdom:Animalia
    Phylum:Chordata
    Class:Chondrichthyes
    Order:Squatiniformes
    Family:Squatinidae
    Genus:Squatina
    Species:Squatina squatina]]>     2018-05-30 15:18:23 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264558409     Major Characteristics: Manta Ray tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264560352 Location & habitat
    - Tropical Waters and Oceans

    Physical characteristics
    - Can be up to 23 ft in width
    - Forward Facing Mouth
    - Tails have no skeletal support

    Behavioral characteristics
    - Sometimes Rays may breach
    - Swim at a constant rate in a straight line

    ]]>     2018-05-30 15:24:28 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264560352     Major Characteristics: Great White Shark tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264561623 Location & habitat
    - All Major Oceans
    - Ocean Temperatures of around 54-75 °F

    Physical characteristics
    - Live to about 70 Years
    - Serrated Teeth
    - Countershading between the belly and shadow

    Behavioral characteristics
    - Swims at around 35 mph
    - Dominance Heirachy: Females Dominate Males
    - Breachning

    ]]>     2018-05-30 15:29:15 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264561623     Major Characteristics: Angel Shark tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264564549 Location & habitat
    -     Atlantic Ocean
    - 150 meters depth
    - Mud or Sandy Floors

    Physical characteristics
    - Flat
    - Two Dorsal Fins
    - Can be gray, red, or green
    - Small Sharp teeth

    Behavioral characteristics
    -     Nocturnal Predator
    - Females can have 7-25 pups every other year
    - Burries itself in the sand to hide
    - Ambushes it prey]]>     2018-05-30 15:39:03 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264564549     Doliodus problematicus tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264803679 Age of fossil: 409 million years old
    - From the Devonian Period]]>     2018-05-31 14:42:08 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264803679     tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264804666 2018-05-31 14:45:43 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264804666 Carcharocles megalodon tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264805444 Age of fossil: 23-2.6 mya (Early Miocene to the end of the Pliocene) ]]> 2018-05-31 14:48:32 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264805444 Ageleodus pectinatus tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264806098 Age of fossil: Late Devonian Period (310 mya)]]> 2018-05-31 14:50:38 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264806098 Glikmanius occidentalis tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264806471 Age of fossil: 306.95 to 265.0 Mya (Palaeozoic)]]> 2018-05-31 14:52:05 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264806471 Scapanorhynchus texanus tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264807161 Age of fossil: Cretaceous Period (80mya)]]> 2018-05-31 14:54:19 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264807161 Fossils Can Show Evolution tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264808250 The fossils show similarities of teeth between the generations of sharks. Modern sharks now have  about 6-7 gills and some have even changed to become filter feeders. The species has also survived 5 mass extinctions with 95% of species being killed and have changed and adapted to still be a dominant predator in the water.]]> 2018-05-31 14:57:36 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264808250 Biochemistry tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264814028 Since the proteolipid protein is found in both sharks and rays, this also proves that their ancestors could’ve been similar because they both have the protein.]]> 2018-05-31 15:14:59 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264814028 Natural Variations tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264921370 Manta Ray - (30ft-18ft 1in) Dark brown, grayish blue, and black (3,600lbs-29.5 oz)

    Great White Shark - (21ft-13ft) Pale to Dark gray (2,400 lbs-1,500 lbs)

    Angelshark - (6.5 ft-5ft) Black, brown, reddish, grey or greenish sandpaper-like skin (Up to 77 lbs)
    ]]>     2018-06-01 01:29:36 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264921370     DNA Similarities tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264921878 Sharks and rays share the same gene that codes for the proteolipid protein. This proves that they could’ve been from  a common ancestor because they both have that gene.]]> 2018-06-01 01:33:26 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264921878 Microevolution tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264923174 Sharks skin color has changed a lot because this allow them to blend in with the water the deeper they go, making them harder to see from above. The upper jaw isn’t fused to the great whites shark’s skull but fused instead with flexible connective tissue which allows them to increase bite radius. Manta Rays have evolved to have a flattened, disk shape body that allows them to hide from predators in the sea bed sediment, helped when searching for food.]]> 2018-06-01 01:43:53 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264923174 Convergent Evolution tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264928396 Sharks and rays are an example of convergent evolution because they both adapted similar traits, like filter feeding in whale sharks, basking sharks, and manta rays, to survive in a similar environment.]]> 2018-06-01 02:16:43 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264928396 Speciation tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264929196 Sharks and Rays type of speciation is punctuated equilibrium because new species aren't being formed gradually. The sharks and rays stay the same until the population becomes unstable and then new species are formed ]]> 2018-06-01 02:22:21 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264929196 Genetic Drift tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264930179 There is no major gene flow in Great white sharks and rays because there isn’t much genetic diversity which means that the new migrants won’t have an effect on the allele frequency because they are already so similar.]]> 2018-06-01 02:29:27 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264930179 Chromosomal Similarities tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264930475 Angel Sharks have 31 pairs of chromosomes and Manta rays have 32 pairs of chromosomes. These are the average chromosomal numbers for sharks and rays. These numbers are very similar which means they could be very closely related.]]> 2018-06-01 02:31:09 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264930475 Conclusion tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264931013 Darwin's Descent with Modification theory is shown in sharks because the sharks' teeth are getting harder, sharper, and some sharks are gaining more and more teeth.

    Manta Rays go through stabilizing selection because, most of the organisms have similar traits and they are all successful. Wider mouths are more successful because it allows the rays to take in larger amounts of food.

    Great White Sharks go though stabilizing selection because the average traits are most successful. The bigger sharks will be most successful because of their ability to swim faster and catch prey easier.]]>     2018-06-01 02:35:13 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264931013     Phylogenic Tree tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264934197 This tree shows their ancestors and how the sharks and rays evolved to become what they are.]]> 2018-06-01 02:55:29 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264934197 Isolation tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264936391 A form of geographic isolation that can affect my taxonomic group is fresh water and salt water which can separate species of rays and sharks. Water temperature can also affect the gene flow because certain sharks and rays like specific temperatures.]]> 2018-06-01 03:12:23 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264936391 Sources tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264937089 https://504collaborationoption.weebly.com/natural-selection-in-great-white-sharks.html
    https://www.mantaray-world.com/manta-ray-evolution/
    https://www.mantaray-world.com/manta-ray-information/
    https://prezi.com/aopdu9rwa3eu/evolution-of-the-manta-ray/
    http://theconversation.com/low-levels-of-genetic-diversity-are-putting-great-white-sharks-at-risk-50792
    https://en.wikipedia.org/wiki/Great_white_shark#Adaptations
    https://www.arkive.org/angel-shark/squatina-squatina/
    http://giantmantaray.weebly.com/evolution.html
    https://www.sharks-world.com/shark_anatomy/
    http://www.actforlibraries.org/the-evolution-of-sharks/
    https://news.nationalgeographic.com/news/2003/10/1001_031001_sharkfossil.html
    http://www.fossilguy.com/gallery/vert/fish-shark/shark_evolution/shark_evolution.htm
    http://www.fossilguy.com/gallery/vert/fish-shark/shark_evolution/shark_evolution.htm
    ]]>     2018-06-01 03:18:56 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264937089     Information From Taxonomy tk481 https://padlet.com/tk481/rbyytw8sf3jn/wish/264937289 Sharks and Rays are related down to the class of Chondrichthyes which are Cartilaginous fishes. You can find out from the taxonomy that all Chondrichthyes have a skin covered in placoid scales, the structure of their fins are similar, and they don’t have swim bladders. With a similar taxonomy you can determine similar feature that the animals have.]]> 2018-06-01 03:21:10 UTC https://padlet.com/tk481/rbyytw8sf3jn/wish/264937289