Distributions of larval mosquitoes among bamboo-stump pools which vary in persistence and resource input |
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Authors: | Toshihiko Sunahara Motoyoshi Mogi |
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Institution: | (1) Division of Parasitology, Department of Microbiology, Saga Medical School, Japan |
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Abstract: | We studied the seasonal occurrence and the distribution patterns of larval mosquitoes in a bamboo grove in northern Kyushu,
Japan. The number of pools was large from June to August and was small in winter. Deep stumps and semi-closed-type stumps
held water more persistently than shallow and open-type stumps, respectively. Open-type stumps trapped more leaves than semi-closed-type
stumps and the number of leaves trapped in the open-type stump was positively correlated with the area of the pool. The incidences
ofTripteroides bambusa andAedes albopictus were low early in their breeding season and gradually increased thereafter. In August, the density ofT. bambusa larvae per pool was higher in the old (>2 months) pools than in the new pools and was positively correlated with the depth
of the stumps. In contrast, the density ofA. albopictus did not differ significantly between the new-and old pools and was not significantly correlated with the depth of the stump.
The density ofA. albopictus was positively correlated with the number of leaves that had been trapped in the stump, whereas the density ofT. bambusa was not. In addition to the seasonal fluctuation in habitat-patch availability, the variations in habitat persistence and
resource input among bamboo stumps may facilitate the coexistence of the two mosquitoes that were differentially limited by
these factors. |
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Keywords: | Aedes albopictus bamboo stump coexistence habitat persistence mosquito Tripteroides bambusa |
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