Growth and development of Hydromedion sparsutum (Müller) (Coleoptera, Perimylopidae) from South Georgia at different temperatures
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Adaptation of Hydromedion sparsutum (Coleoptera, Perimylopidae) to the cool, moderate climate of South Georgia Island was studied under lab conditions. Because there are no native vertebrate herbivores on the island, the Perimylopidae as primary destruents occupy an important role in the ecosystem of S. G. H. sparsutum was reared at constant temperatures of 4, 7.5, 10, 12.5 and 14°C. Constant temperatures higher than 10°C are lethal to the population, larvae do not develop to imaginal stage. Developmental speed and growth are slightly temperature compensated between 4 and 7.5°C. The Q10-value of the weekly growth rate for this range is 1.23.
KeywordsGrowth Rate Constant Temperature Moderate Climate Vertebrate Herbivore Weekly Growth
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