The Ocean Foundation is the host for the Boyd Lyon sea Turtle Fund.
The 2009 Boyd Lyon
Scholarship Awardee:
Melania C Lopez-Castro
Congratulations
to
our second Boyd Lyon Sea Turtle Fund
scholarship recipient, Melania C.
Lopez-Castro!! Melania is currently a Ph.D
student at the University of
Florida Department of Biology and is studying
the early life cycle of
Atlantic green sea turtles, specifically where
these turtles go and
what to do during their "lost years" of early
development. Here is a
description of Melania's
project:
Project
summary
Sea
turtles have complex
life cycles and although we have learned much
about their reproductive and neritic
foraging grounds, no one has solved the mystery
of the "lost years" of sea
turtles -- where sea turtles spend their first
years of life (Reich et al.
2007, Arthur et al. 2008) --
except for loggerheads, Caretta
caretta (Carr 1986, Bjorndal et al.
2000, Bolten
2003b). Locating these areas is an important
goal in sea turtle conservation
because we cannot protect these turtles, or
know what threats they face, unless
we know where they are.
Recently, members of the
Archie Carr Center for Sea Turtle Research made
a great advance in the "lost
years" puzzle by determining that "lost year"
green turtles inhabit open ocean
habitats and feed as carnivores in the North
Atlantic (Reich et al.
2007), but we still don't know their geographic
location. With my research I
will build on this advance to determine the
location and number of these
oceanic habitats by analyzing the regional
variability of trace elements in the
scute of Atlantic green turtles and determine
connectivity patterns between
oceanic and coastal foraging areas. I will
collect samples of young green
turtles at neritic foraging grounds in Florida,
the Bahamas, Nicaragua and
Brazil. Because scute is an
inert
tissue once it is deposited (similar to human
fingernails), I can evaluate a
history of where turtles have been by analyzing
the scute layers deposited over
previous years and with that, I can determine
if young green turtles from these
neritic foraging grounds come from the same
oceanic area or are using different
oceanic
areas.
Thanks
to the work done with loggerheads in the
Atlantic, I will be able to compare
the elemental signature of scutes of
loggerheads from different oceanic
foraging grounds (Northeast Atlantic, Azores,
Brazil) and compare them with the
elemental signatures of green
turtles which might give us an idea of where
in the ocean
green turtles spend their "lost years" and
solve this mystery.