|
Bonehenge Updates from Keith Rittmaster - NCMM Natural Science Curator |
|
|
|
June 2010 Update
|
|
|
|
April 2010 Update
|
|
|
|
December 9th 2009 Update
|
|
|
Bonehenge goes global!
A poster about Bonehenge was prepared for the Society for Marine Mammalogy's
international Biennial Conference on the Biology of Marine Mammals in Quebec
City October 12-16, 2007. To view the poster click the Bonehenge Poster Link.
To enlarge the poster - click on it. |
|
Bonehenge Poster
|
|
|
|
September 9th 2009 Update
|
|
|
|
July 2009 Update
|
|
|
|
June 2009 Update
|
|
|
|
April 2009 |
|
Flipper Xray |
|
Flipper X-ray - When our sperm whale was fresh dead on the beach 5 years
ago, Paul Nader cut off the left flipper and froze it with the idea that x-rays
would help us make a more accurate display. Meanwhile, I asked Mark
Stevens of Beach Care East to X-ray my daughter Lindsey's arm as her bones are
at approximately same stage of development as those of our sperm whale. It
makes for a good comparison as both species have similar arm/flipper bones and 5
digits. Attached is a composite of all the X-rays, as well as the bones of
the flipper we buried with the rest of the whale carcass.
|
|
|
|
|
March 2009 |
|
Whale Aging |
|
Tooth preparation and age estimation:
Vicky and I spent a day behind the scenes at the Smithsonian Institution in Washington DC
working with Charley Potter, Marine Mammals Collections Manager, to prepare a
tooth for age estimation. We made several tooth cuts to get a thin,
longitudinal section. We then soaked the section in formic acid for 6 hours,
stained it with India ink, removed most of the stain with acetone, and
photographed it on a light table through cross-polarized light. Counting the
annual growth layers gives us an age estimate of 15 years
|
|
|
|
Stomach
contents:
Sperm whales mainly eat medium to large
squid. We have the stomach contents
(photo at right) from “our” sperm whale which Vicky plans to analyze. It looks
like primarily squid beaks and parasitic worms.
|
|
|
|
February 2009 |
|
Bonehenge Goes to College |
|
Bone degreasing - The1st batch of bones were processed in the vapor
degreaser at the NCSU College of Veterinary Medicine. The degreased bones
are a bit lighter in color and significantly lighter in weight. We weighed
all the bones prior to degreasing and will do so again after degreasing.
The few bones we weighed so far indicate that the degreasing process decreased
the weight of each bone by around 12%. This will be helpful as we attempt
to estimate the weight of the final skeletal display. In addition to
reducing the bone weight, degreasing kills bacteria, eliminates the bone odor,
improves the performance of adhesives and resins used on the bones, improves the
appearance of the display, and reduces the amount of dust that adheres to the
bones over time. After degreasing we'll soak the bones in a weak hydrogen
peroxide solution to further kill bacteria, dissolve any remaining flesh, and
make the bone color lighter and more uniform.
|
|
|
|
|
|
|
|
|