Studies on the mosquitoes in the Yaeyama Islands, Japan : 7. Observations on the mating behavior of Aedes (Verrallina) iriomotensis

Miyagi, Ichiro; Toma, Takako

doi:10.7601/mez.32.287

Cited by 3 publications

(5 citation statements)

References 3 publications

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“…The time to complete this event is species-specific. Aedine species show a great variation: Aedes iriomotensis , Aedes albopictus , Aedes atriisimilis were shown to rotate 180° respectively around 12, 22 and 40 hours after emergence [10]; 18 to 24 h were required for Aedes aegypti [8]; 30 h for Aedes taeniorhynchus [11] and nearly 4 days for Aedes provocans [12]. Culex tritaeniorhynchus and Culex quinquefasciatus completed the rotation in 19 h [13,14].…”

Section: Introductionmentioning

confidence: 99%

Laboratory selection for an accelerated mosquito sexual development rate

Oliva

Benedict

Lempérière

et al. 2011

Malar J

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BackgroundSeparating males and females at the early adult stage did not ensure the virginity of females of Anopheles arabiensis (Dongola laboratory strain), whereas two years earlier this method had been successful. In most mosquito species, newly emerged males and females are not able to mate successfully. For anopheline species, a period of 24 h post-emergence is generally required for the completion of sexual maturation, which in males includes a 180° rotation of the genitalia. In this study, the possibility of an unusually shortened sexual maturity period in the laboratory-reared colony was investigated.MethodsThe effect of two different sex-separation methods on the virginity of females was tested: females separated as pupae or less than 16 h post-emergence were mated with males subjected to various doses of radiation. T-tests were performed to compare the two sex-separation methods. The rate of genitalia rotation was compared for laboratory-reared and wild males collected as pupae in Dongola, Sudan, and analysed by Z-tests. Spermatheca dissections were performed on females mated with laboratory-reared males to determine their insemination status.ResultsWhen the sex-separation was performed when adults were less than 16 h post-emergence, expected sterility was never reached for females mated with radio-sterilized males. Expected sterility was accomplished only when sexes were separated at the pupal stage. Observation of genitalia rotation showed that some males from the laboratory strain Dongola were able to successfully mate only 11 h after emergence and 42% of the males had already completed rotation. A small proportion of the same age females were inseminated. Wild males showed a much slower genitalia rotation rate. At 17 h post-emergence, 96% of the laboratory-reared males had completed genitalia rotation whereas none of the wild males had.ConclusionThis colony has been cultured in the laboratory for over one hundred generations, and now has accelerated sexual maturation when compared with the wild strain. This outcome demonstrates the kinds of selection that can be expected during insect colonization and maintenance, particularly when generations are non-overlapping and similar-age males must compete for mates.

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Section: Introductionmentioning

confidence: 99%

Laboratory selection for an accelerated mosquito sexual development rate

Oliva

Benedict

Lempérière

et al. 2011

Malar J

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“…Behavior of Ae. maehleri more or less resembles to "early copulation" described for Culiseta inornata Williston (Rees andOnishi 1951, Lang 1977), Opifex fuscus Hutton (Marks 1958, Haeger andProvost 1965), Deinoserites cancer Theobald (Downes 1966, Provost and Haeger 1967, Conner and Itagaki 1984, and Aedes iriomotensis Tanaka & Mizusawa (Miyagi and Toma 1981). Males of these species have antennae of reduced plumosity, and copulation with a female just having emerged continues some minutes on the water surface.…”

Section: Days Driedmentioning

confidence: 82%

“…Two pupae are near the left border. (Miyagi and Toma 1982). Main larval habitats of these species are ground pools (Zavortink 1972, Miyagi and Toma 1982, Alfonzo et al 2005, and factors that caused no or weak resistance are unknown.…”

Section: Days Driedmentioning

confidence: 99%

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Unusual Life History Traits of Aedes (Stegomyia) Mosquitoes (Diptera: Culicidae) Inhabiting Nepenthes Pitchers

Mogi

2010

Annals of the Entomological Society of America

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Unusual life history traits of Aedes (Stegomyia) dybasi Bohart of Palau and Aedes (S.) maehleri Bohart of Yap, Micronesia, were observed in the laboratory. These species are unique in the subgenus Stegomyia in that they use pitchers of a carnivorous plant, Nepenthes mirabilis Druce, as larval habitats. Traits of Ae. dybasi were compared with two sympatric, container-breeding species, Aedes (S.) palauensis Bohart, a probable ancestor of Ae. dybasi, and Aedes (S.) hensilli Farner. Life history traits of Ae. dybasi differ distinctly from those of Ae. palauensis and Ae. hensilli in egg and adult stages as well as in the larva. The female is autogenous and lays a few but extremely large eggs that can neither resist desiccation nor postpone hatch. The latter two species take blood and produce many smaller eggs with desiccation resistance as usual in Stegomyia. Developmental time of eggs was shorter in Ae. dybasi, whereas that for larvae and pupae was longer. Ae. maehleri differs from other Stegomyia species in its early copulation, where males copulate with newly emerging females on the water surface. Females neither are autogenous nor take blood from human hands. Nepenthes pitchers that provide mosquito larvae with a unique environment could contribute to studying either converging or diverging patterns in mosquito evolution under phylogenic potential and constraints after acquisition of a new larval habitat.

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“…This time was chosen so that males and females were likely to have reached sexual maturity. Although it is unknown when this occurs for Aedes sierrensis , in congeneric species males tend to reach maturity one to two days after emergence (Miyagi & Toma 1982, Chevone et al 1976, Provost et al 1961) and females can take a blood meal two days after eclosure (Lyimo & Takken 1993). Adults were starved prior to the trial as we found that sugar-feeding impacted individual thermal tolerance in preliminary trials.…”

Section: Methodsmentioning

confidence: 99%

Plasticity in mosquito size and thermal tolerance across a latitudinal climate gradient

Lyberger,

Farner,

Couper

et al. 2024

Preprint

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Variation in heat tolerance among populations can determine whether a species is able to cope with ongoing climate change. Such variation may be especially important for ectotherms whose body temperatures, and consequently, physiological processes, are regulated by external conditions. Additionally, differences in body size are often associated with latitudinal clines, thought to be driven by climate gradients. While studies have begun to explore variation in body size and heat tolerance within species, our understanding of these patterns across large spatial scales, particularly regarding the roles of plasticity and genetic differences, remains incomplete. Here, we examine body size, as measured by wing length, and thermal tolerance, as measured by the time to immobilization at high temperatures ("thermal knockdown"), in populations of the mosquito Aedes sierrensis collected from across a large latitudinal climate gradient spanning 1300 km (34-44 N). We find that mosquitoes collected from lower latitudes and warmer climates were more tolerant of high temperatures than those collected from higher latitudes and colder climates. Moreover, body size increased with latitude and decreased with temperature, a pattern consistent with James' rule, which appears to be a result of plasticity rather than genetic variation. Our results suggest that warmer environments produce smaller and more thermally tolerant populations.

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Studies on the mosquitoes in the Yaeyama Islands, Japan : 7. Observations on the mating behavior of Aedes (Verrallina) iriomotensis

Abstract: Studies on the mosquitoes in the Yaeyama Islands, Japan' 7. 0bservations on the mating behavior of Aeales (Ve7'ralliua) iTiomotensis

Cited by 3 publications

References 3 publications

Laboratory selection for an accelerated mosquito sexual development rate

Laboratory selection for an accelerated mosquito sexual development rate

Unusual Life History Traits of Aedes (Stegomyia) Mosquitoes (Diptera: Culicidae) Inhabiting Nepenthes Pitchers

Plasticity in mosquito size and thermal tolerance across a latitudinal climate gradient

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