title: Development and survival of immature Culex annulirostris mosquitoes in southeast Queensland.
abstract: The rates of development and survival of the immature stages of Culex annulirostris were studied in three different breeding sites in the Brisbane area of southeast Queensland: a temporary rain-filled pool (TP), a semi-permanent pool (SPP), and an area of flooded grassland (FG) arising from the overflow of a permanent pond. Parallel observations were made on larvae and pupae either exposed to predation or in predator-free cages of 12 and 15 consecutive days respectively. Development was fastest and survival highest in the warmer TP. Average daily mortality of larvae (L) and pupae (P) was TP: L 8.3%, P 9.5%; SPP: L 25.2%, P 34.6%; FG: L 18.8%, P 35.4%. From life-tables and survivorship curves, survival from first instar to adult was TP 34.8%, SPP 2.0% and FG 4.2%. Mortality from predation was TP 43.2%, SPP 68.7% and FG 69.1%. Predator density was TP 0.32, SPP 1.48 and FG 1.76 per 300 ml sample.
authors.affiliation: Communicable Diseases Branch, Queensland Health, Brisbane, Australia.
authors.forename: P
authors.initials: P
authors.lastname: Mottram
authors.forename: D S
authors.initials: DS
authors.lastname: Kettle
mesh_terms: D000818:Animals; D003465:Culex / Q000254:growth & development*; D004777:Environment; D007814:Larva; D009026:Mortality; D011793:Queensland; D012098:Reproduction