Blending population ecology and parasitology
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Blending Population Ecology and Parasitology. Kyle Luth GIS Fall 2008. Organisms. Helisoma anceps pulmonate snail found mostly in mud and in leaf litter host Daubaylia potomaca nematode parasite direct lifecycle. *Images: http://images.google.com, Chernin et al., 1960. Location.

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Presentation Transcript

Organisms
Organisms

  • Helisoma anceps

    • pulmonate snail

    • found mostly in mud and in leaf litter

    • host

  • Daubaylia potomaca

    • nematode parasite

    • direct lifecycle

*Images: http://images.google.com, Chernin et al., 1960


Location
Location

  • Mallard Lake

    • Forsyth County

    • freshwater, public access

  • Logistics:

    • Latitude: 36.0029

    • Longitude: -80.4028

    • Elevation: 705 ft (215 m)

    • Perimeter: 1,426 m

*Image: www.co.forsyth.nc.us/Tanglewood/recr_Fishing.aspx



Transects

Goals:

determine which substrata are where

allow for random sampling model

determine where snails are located

distribution

density

determine where nematodes are located

distribution

density

N

M

L

O

K

J

P

I

Q

H

G

F

E

D

C

B

A

Transects

A


Questions to answer
Questions to Answer

  • Does snail density influence the transmission of the nematode?

  • Are there patterns of snail and/or parasite distribution?

  • Are there “hot spots” of infection?

    • High incidence of host-parasite contact/interaction

  • What are the transmission dynamics assoc. with this system?

    • Hyp: Transmission will be greater in muddy areas than in leaf-cover areas.


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