Medical Entomology and Zoology (1997) 48, 19-24

Yoshio Tsuda, Akemi Suzuki, Masahiro Takagi and Yoshito Wada (1997)
Different responses to larval crowding between 2 strains of Aedes albopictus (Diptera: Culicidae) from Japan and Thailand
Medical Entomology and Zoology 48 (1), 19-24
Abstract: Responses of larval populations to crowding were compared between 2 strains of Aedes albopictus from Nagasaki (NG), Japan and Chiangmai (CM), Thailand. Newly hatched larvae were reared with 6 different initial densities from 8 to 256 larvae/vial. The daily survival rate of old larvae and the number of produced pupae/ vial differed between the 2 strains in high density-cohorts, while in low density-cohorts both strains showed similar responses to larval crowding. The differences in developmental time from hatch to pupation and in size of pupae were not significant between the strains, although the increased density resulted in delayed development of larvae and smaller pupae in both strains. The analysis of density-dependence of larval mortality showed different sensitivity to larval crowding between the 2 strains; the CM strain was more sensitive than the NG strain. Based on these results, the differences in growth pattern of laboratory populations between the 2 strains were discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Yoshio Tsuda

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aedes albopictus		Japan
	Aedes albopictus		Thailand