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Lowell
Adams
 Susan Hagood and turtle dog Drew
 An eastern box turtle |
Habitat loss and
fragmentation, destruction of eggs and hatchlings by predators, and road
mortality have taken a toll on the eastern box turtle. It is widely
believed that the species is declining throughout most of its range. Ph.D.
student Susan Hagood is studying the genetic structure of eastern box turtle
populations in central Maryland. She is particularly interested in effects
of habitat fragmentation on the species and in quantifying mortality due to
roads and other factors. Susan hopes that knowledge gained from her work
will lead to development of better management plans for the species.
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The Diamondback Terrapin
(Malaclemys terrapin), mascot of the University of Maryland and Maryland state reptile, is
under investigation in the Old Line State. Historically, the species was
overexploited, largely from excessive harvest pressure for the food market.
Today new factors threaten the species. In the Chesapeake Bay watershed,
wetland loss along with urban development, intensive agricultural practices, and
predation impact terrapins. To better understand the ecological factors
that control population growth of terrapins, Ph.D. student Jose Barrios, working
cooperatively with researchers at nearby Patuxent Wildlife Research Center, is
studying the impact of major nest predators on terrapins along with habitat
characteristics important for successful nesting of the species. Jose was
awarded a Gates Millennium Scholarship to pursue his graduate work at the
University of Maryland.
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Diamondback Terrapin (Malaclemys terrapin) |

Terrapin nesting habitat |

Jose Barrios and Maryland terrapin |


Tagging and vaccinating fawns |
One question that
has surfaced with regard to immunocontraception of white-tailed deer for
population control is whether or not the technique selects against animals with
strong immune systems. M.S. student Amy Pedersen, in collaboration with
The Humane Society of the United States, is studying this question at the
National Institute of Standards and Technology in Gaithersburg, Maryland.
Amy is studying two groups of female deer, both of which have been treated with
an immunocontraceptive vaccine. All deer in one group have produced young
and all deer in the second group have not produced young. Assaying blood
samples, Amy hopes to determine whether or not there is a significant difference
in the immune response of deer between the two groups.
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In cooperation with scientists at nearby Patuxent Wildlife Research Center, M.S. student David Kidwell
is studying the influence of benthic macroinvertebrates on the distribution and abundance of wintering seaducks in the
mesohaline Chesapeake Bay. Biologists are concerned about declining populations of seaducks, particularly of long-tailed
duck (Clangula hyemalis), black scoter (Melanitta nigra), and surf scoter (M. perspicillata). David
is investigating the relationship between available food and numbers of seaducks. Spatial and temporal patterns of benthic
macroinvertebrate availability will be correlated with seaduck distribution and abundance. Water quality and sediment
characteristics will also be analyzed for possible correlation with seaduck distribution. David hopes that results of his
study will aid resource managers in North America in better management of seaduck populations.
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David Kidwell and Dr. Matt Perry on Chesapeake Bay

Adult male surf scoter
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