Sea Turtle Questions by lonyoo

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									Sea Turtle Questions                                   Marine Science Block C

Megan Kelly & Sara Godfrey
    1. How to scientists think that hatchlings find their way back to sea? Discuss two theories.
-Scientists are not sure how sea turtles reach the ocean, but one theory is that they are attracted to
a greater light intensity of the horizon.
-Another theory is that hatchlings have an internal magnetic compass that helps it navigate away
from the beach.

    2. How do hatchlings protect themselves from predators and how do mothers assist in this
       process?
-Most hatchlings emerge at night from the nest. This way, they are less likely to run into daytime
predators. They will head to the water in groups. Some nests, however, will produce hatchlings
on multiple nights.
-In deeper water, hatchlings are less vulnerable to predators.
-Mothers will cover their eggs to protect them from predators such as herons.

    3. How is the sex of a hatchling determined?
-The sex of a sea turtle embryo is determined after fertilization based upon the temperature of the
nest. A lower temperature in the nest will produce more male sea turtles, while a higher
temperature will be more likely to produce female sea turtles.

    4. How do hatchlings break open their shells?
- To break open the shell of a turtle egg, a hatchling will use a temporary egg tooth called a
caruncle.

Emily Procter, Agnes Rabelo, Ashleigh Silberstein
1. Where are most turtle species found? And why?
       A. Most turtles are found in warm tropical coastal waters. This because, they are cold
          blooded.

2. What is the most common method used to track free-ranging sea turtles? And how does it
work?
      A. Flipper tagging. The device is attached to the back of their shell, and is designed to
            release within several months.

3. Where are the most juvenile turtles found? Adult turtles?
      A. The adults are found in shallow coastal waters, bays, lugoons, and estuaries. The
          Juveniles are only found in bays and estuaries. Both the adult and juvenile turtle can
          adventure into open sea seas.

4. Why is the turtle population hard to keep track of?
        The turtle population is hard to keep track of because only the females come up out of the
water to lay eggs. The males and juvenile turtles stay in the water and are hardly seen.

Rachel Gilbert and Cat Jenks – need answers?
               1. At what age to sea turtles reach sexual maturity?
Varies within populations and species but between 3 and 50 years of age
               2. What are the three purposes of burying the eggs?
Moist, warm, protected from predators
              3. What does “arribada” mean and what does it have to do with turtles?
Arrival- when the ridley’s come to shore in huge numbers simultaneously and lay their eggs
              4. What is the purpose of the male’s larger claws?
Grab female during mating

Chris Jennings & Malte Bockhorst
   1. Sea turtles are endothermic? If not what are they?
        They are ectothermic, meaning they are cold blooded.
   2. What kind of species are there and what kind of turtles/tortoises do they represent?
        Pleurodira (side-necked turtles)
        Cryptodira (all other living species)
        Amphichelydia (extinct species)
   3. Name two facts for reptiles
        They have a three chambered heart.
        They breather air through lungs and they have nostrils.
   4. When did the earliest known sea turtle appear?
        They first appeared 144 million years ago.

Mesha Vos Levitz, Ashley Fulton, Mike Rafter
    1. Why do turtles appear to sometimes have “tears”?
When they come ashore the secretion of salt and fluid can make them look as if they are crying
and these “tears” help the females keep their eyes clean while they dig their nests.
    2. When is the only time that turtles need to leave the sea?
The only time sea turtles need to leave the sea is when the females go to lay their eggs, but
turtles have been spotted basking on land.
    3. Why don’t sea turtles need freshwater?
They can metabolize the salt-water
    4. Up to how long can the time be between a turtles heartbeat? 9 minutes!!!!

Sarah Boudreau, Hannah MacDonald, Bryanna Vacanti
   1. What is the largest sea turtle?

   Leatherback turtles, 441-1,116 lbs and 4-6 ft

   2. Are sea turtles better at swimming or walking on land? Why?

   Swimming, because their flippers are adapted for the water

   3. What are the top and bottom shells called?

   Top- carapace, bottom- plastron

   4. What colors can sea turtles be?

   Olive green, yellow, greenish-brown, and black
Melissa Tyler, Sarah Chiavarini, Julie Murphy
1. What is fibropapilloma? Include what causes it and if humans have a similar condition.
     Fibropapilloma is a disease that causes tumors on the skin, eyes, neck and eventually the
       inner organs of a sea turtle. Each tumor is like a wart on a human. It’s caused by a
       combination of red tides and the herpes virus. Tumors can be up to 10 cm large.
2. How does human influence hurt the turtle population?
     Humans hurt the turtle population in many ways. Females may turn away from nesting
       beaches because of noise, light or trash. Turtles can drown in shrimping nets or get hit by
       boats. They can also eat trash by mistake, thinking they’re jellyfish.
3. How long is a sea turtle’s natural life? Be specific.
     80 years, 30 years after their sexual maturation.
4. What products can be made by turtles and their eggs?
     Turtle eggs are used to make aphrodisiacs or food. Their fat and cartilage can be made
       into soup, and their shells are valuable decorations – they’re used for combs and eyeglass
       frames.

Steph-annie Lee Barnes

1. What do sea turtles eat?
Soft bodied things
2. How do leather back sea turtles feed?
They follow the rising and sinking of plankton – stay away from light!
3. Hawksbill turtles spend most of their time doing WHAT?
Resting and sleeping wedged in rock coral wedges
4. What lines the mouth cavity?
Papillae pointed backwards to help swallow soft bodied food.


Dan Curtiss, Nick Deadrick, Curtis Rafter
   1. Is the effort to stop the decrease in Sea Turtle population a worldwide issue?
-Yes, the U.S. and 115 other countries have joined in to help stop the exportation of turtle
products, as well as supporting marine animal rights.

    2. What do the Low pressure sodium vapor lights do for the sea turtles?
-The lights reduce the threat of lighting problems which disorientation the turtle hatchlings. It is
an alternative method for this issue, because beach lighting is having a devastating effect on
particular nesting grounds.

    3. What sort of mechanical advances have helped sea turtle conservation?
-Devices such as the TED (Turtle Exclusion Device) can help separate turtles from harmful
fishing nets.

4. How many species of Sea Turtles are considered threatened in the U.S.?
-Eight

								
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