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Growth, reproduction and longevity in nematodes from sewage treatment plants

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The growth, reproduction and longevity ofDiplogasteritus nudicapitatus, Paroigolaimella bernensisandRhabditis curvicaudatawere investigated under conditions of excess food within the temperature range 5°C–20°C. In all three species growth rate increased with temperature, and inD. nudicapitatusandR. curvicaudatathe adult size attained varied significantly with temperature.P. bernensisdid not reproduce at 5°C, but showed a progressive increase in reproductive output at higher temperatures.D. nudicaitatusshowed increased egg production as temperature increased whileR. curvicaudatahad maximum egg output at 10°C. Longevity is temperature dependent, decreasing with higher temperatures. Virgin females survived for longer than reproducing females. The data indicate that whileD. nudicapitatusandP. bernensisare thermophilic species,R. curvicaudatais adapted to lower tempera

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