Friday, April 3, 2009

Day 3 R/V Point Sur Part 3

Here is a short video on the skate dissection. Mariah Boyle, one of the graduate students from MLML, is doing her research on skates. Skates and rays are similar to each other, but skates lay eggs while rays give live birth. Rays usually are larger in size than skates.

*Remember to allow the video to buffer and completely download. It will make the video go smoothly.*




Here is another short video of the skate's heart.





=)



“This material is based upon work supported by the National Science Foundation under Grant No. 0727135. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation (NSF).”
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29 comments:

  1. AnonymousApril 8, 2009 at 11:05 PM

    Hi Michelle,

    How many chambers to the skate's heart? Is the circulatory system similar to man's w/ venous and arterial? The blood looks fairly well oxygenated. How far below the surface does the skate live? It's interesting it lays eggs as opposed to live births. Where are the eggs laid? How long does it take from the eggs being laid to hatching?

    Mom

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  2. DeepBluSea25April 9, 2009 at 7:43 PM

    Hello, Mom. These answers are from the collaborative effort of the graduate students, Donna, Mariah, Shaara, and Nicole.

    Skates have three heart chambers. They can live in very shallow water and we believe the deepest ever found is just shy of 5000 meters. It is interesting that skates are all oviparous (egg-bearing) while sharks can be either oviparous or viviparous (live-bearers). From paired ovaries most skates simultaneously produce one egg case in each shell gland, meaning that there are two egg cases in a female at once. Egg cases are deposited on the seafloor, often in groups at nesting sites used by many females, and some egg cases possess long tendrils to attach to the substrate and anchor them to the seafloor. We don’t know much about the time between eggs being laid to the time of hatching yet, but estimates are anywhere from a few weeks to over a year. We have some estimates from captive studies (i.e. skates in aquaria) but we don’t know if these same rates apply to their natural environment.

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  3. AnonymousApril 14, 2009 at 10:26 PM

    Hey MS.Kay this is Noah iwas wondering where are you?Like are you in the pacific ocean if so can you tell me where? ;)

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  4. AnonymousApril 15, 2009 at 11:29 AM

    hey ms.kay this is kealii hows the trip?

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  5. AnonymousApril 15, 2009 at 11:37 AM

    hey ms.kay this is kealii.i just wanted to say that
    it was cool when the sting rays heart was still beating when it was out of the body.=)

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  6. AnonymousApril 15, 2009 at 1:39 PM

    Harold and Jay-Ar Pd:6

    Hey Ms. Kay.i was wondering.How many fishes did you guys catch?

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  7. AnonymousApril 15, 2009 at 4:31 PM

    how many chambers to the skate"s heart ?is the circulatory system similar to man with venous and arterial the blood looks fairly oxygenated . how far below the surface does the skate live its interesting it lays eggs as opposed to live births.where are the eggs.... junjun jonah pd.3.$$$$$$$$$$$$$$ b.l.a.s.t.e.r.r.r.s.4 sho

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  8. kaipo jhasmin pd.3September 22, 2009 at 12:58 PM

    wow that is amazing that the heart is still beating even if the heart is not in the body

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  9. Virgilio and Kyle pd.3September 22, 2009 at 12:58 PM

    How come the heart was still beating?

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  10. tiffany and diane russia :) pd 3September 22, 2009 at 12:58 PM

    that was a really interesting video about the skate fish and how small the heart looked like was it the real size or did u zoom it in??? =0

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  11. violet and daney per.3September 22, 2009 at 12:59 PM

    these videos are awesome. I never seen such things like these before these are awesome as can be

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  12. VAITANOA ETHAN PD3September 22, 2009 at 12:59 PM

    IT WAS AWSEOME AND GROSS.

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  13. kaysha and carl period 4September 22, 2009 at 1:57 PM

    Hi!
    why was the stingray heart was still pupping????
    kaysha said it was gross and carl thought it was cool because the HEART WAS STILL PUMPING AND MOVING

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  14. kyla,lisabel pd.4September 22, 2009 at 1:58 PM

    How can the skates heart still be beating when its out of the water and when its dead?

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  15. Jared and darin period.5September 22, 2009 at 3:14 PM

    what shape is a skates heart?

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  16. Aijo and Erica Period 5September 22, 2009 at 3:14 PM

    So cool the beating heart.
    We heard you yell!

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  17. Maila Amanda Pd.5September 22, 2009 at 3:15 PM

    Why was the skate's heart still beating when it is dead ?

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  18. Chavez Olipares Pd.5September 22, 2009 at 3:16 PM

    That was a really cool video. I like the skate. I also like the skate's heart.

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  19. ryssen and grant per.5September 22, 2009 at 3:16 PM

    u know for the skate the tiny heart was still beating.

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  20. Maila Amanda Pd.5September 22, 2009 at 3:18 PM

    Hi it was so cool and is it cool going under water and looking at different kind of fishes.

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  21. Harrietta and Mac period.5September 22, 2009 at 3:18 PM

    That was cool,I never saw a skates heart before just beating by its self!!!!

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  22. grant and ryssen per.5September 22, 2009 at 3:24 PM

    that was the skates egg i tink

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  23. annalynn and ken pd.6September 22, 2009 at 4:04 PM

    that was so so cool!!

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  24. fabienejaime per.6September 22, 2009 at 4:06 PM

    hi, seeing the heart still beat when it's out of body was,really interesting to watch.

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  25. gailSeptember 22, 2009 at 4:10 PM

    Gail from period 6
    oh my gosh i cant believe that the skates heart
    was still beating man that was scary but it was cool!!!!!!!

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  26. robSeptember 22, 2009 at 4:11 PM

    ROB WALTION Pr.6
    that was so cool man

    ReplyDelete
  27. raymond Per.1September 22, 2009 at 9:44 PM

    that was so so cool!!

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  28. Reanne,Jeremiah Period 4September 23, 2009 at 12:42 PM

    It's Awesome that the heart still beats!:D

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  29. diamond and Kimm per.6September 23, 2009 at 3:00 PM

    HI MR$. KAY IT$ AW$OM3 DAT DA <3 $TILL B3AT$ DIAMOND
    HI MRS. KAY, HOW DOES THE HEART STILL BEAT? KIMM

    ReplyDelete

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