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Maternal and direct effects of the intestinal nematode Heligmosomoides polygyrus on offspring growth and susceptibility to infection

Deborah M. Kristan

Department of Biology, University of California, Riverside, CA 92521, USA
Present address: Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA



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Fig. 1. Theoretical Gompertz growth curve showing the three calculated variables used in analyses of offspring growth.

 


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Fig. 2. Body mass growth of parasitized and unparasitized mice that were born to either parasitized or unparasitized mothers. Portions of curves from days 15-60 are empirical and portions of curves from days 0-15 are theoretical extrapolations of curves.

 


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Fig. 3. Tail growth of parasitized and unparasitized mice that were born to either parasitized or unparasitized mothers. Portions of curves from days 15-60 are empirical and portions of curves from days 0-15 are theoretical extrapolations of curves.

 


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Fig. 4. Foot growth of parasitized and unparasitized mice that were born to either parasitized or unparasitized mothers. Portions of curves from days 15-60 are empirical and portions of curves from days 0-15 are theoretical extrapolations of curves.

 


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Fig. 5. Body mass (g) of parasitized and unparasitized mice that were born to either parasitized or unparasitized mothers, showing body composition (lean mass in bottom portion of bars and fat mass in top portion of bars). Error bars are +1 S.E.M. of lean mass or total body mass, and sample size (N) is in parentheses above each bar. M, male; F, female.

 


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Fig. 6. Infection intensities for offspring in the high-infection-intensity group (ranging from 0 to 200 worms, shown in intervals of 20 worms) for mice born to parasitized or unparasitized mothers. The hatched portion of the first bar shows mice with 0 worms.

 

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© The Company of Biologists Ltd 2002