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Map turtle winter leech loads

T E Graham1, R A Saumure, B Ericson

  • 1Biology Department, Worcester State College, Massachusetts 01602, USA.

The Journal of Parasitology
|December 24, 1997
PubMed
Summary
This summary is machine-generated.

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Leeches (Placobdella parasitica) commonly attach to hibernating adult map turtles (Graptemys geographica), with females being more frequently parasitized. These leeches remain attached throughout the winter hibernation period.

Area of Science:

  • Herpetology
  • Parasitology
  • Ecology

Background:

  • Adult map turtles (Graptemys geographica) overwinter in aquatic environments.
  • Leeches, such as Placobdella parasitica, are known ectoparasites of freshwater turtles.

Purpose of the Study:

  • To investigate the prevalence and intensity of leech parasitism on adult map turtles during hibernation.
  • To determine if leeches remain attached to turtles throughout the winter.

Main Methods:

  • Collected 243 adult map turtles from a hibernation site in the Lamoille River, Vermont.
  • Examined turtles for leech attachment, identified leech species, and recorded leech size and brood presence.
  • Re-sampled 7 turtles in March to assess leech presence post-hibernation.

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Main Results:

  • 72.6% of female and 28.6% of male map turtles had attached leeches.
  • Mean leech abundance was significantly higher in females (1.49) than males (0.34).
  • Leeches with attached broods were observed, and leeches remained attached to turtles recovered after winter.

Conclusions:

  • Leech parasitism is common in hibernating adult map turtles, particularly females.
  • Leeches of various size classes, including those with young, remain attached to their turtle hosts throughout the winter hibernation.