INDUCTION AND TERMINATION OF DIAPAUSE IN <i>WYEOMYIA SMITHII</i> (DIPTERA: CULICIDAE), AND LARVAL SURVIVAL STUDIES AT LOW AND SUBZERO TEMPERATURES

Evans, Kadeja; Brust, R. A.

doi:10.4039/ent1041937-12

Cited by 38 publications

(26 citation statements)

References 5 publications

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“…The population returns to density-dependence by late fall and may remain so through the winter when all individuals are in 3rd instar diapause. Evans and Brust (1972) have reported 40-50% winter mortality in W. smithii populations farther north than ours. Our data occasionally show severe winter declines, but are usually more like the 5% winter mortality reported by Paterson (1971) for a New Brunswick population.…”

Section: Discussioncontrasting

confidence: 41%

Ecology and Evolution of the Pitcher‐plant Mosquito. 3. Resource Tracking by a Natural Population

1976

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Section: Discussioncontrasting

confidence: 41%

Ecology and Evolution of the Pitcher‐plant Mosquito. 3. Resource Tracking by a Natural Population

1976

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“…In temporary waters, cues for dormancy termination are not limited to the return of water to the habitat (Williams 2006). Some invertebrate species require a formal sequence of stimuli to break dormancy (Evans and Brust 1972).…”

Section: Discussionmentioning

confidence: 99%

Do Hydrologic Regimes Used in Rice Fields Compromise the Viability of Resting Stages of Aquatic Invertebrates?

et al. 2010

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Irrigated rice fields in southern Brazil remain without surface water for 2 years during the fallow phase. The present study tested the hypothesis that the hydrologic regime adopted in rice fields of southern Brazil does not compromise the viability of resting stages of aquatic invertebrates. Dry sediment samples were collected from 9 rice fields with different durations of the fallow phase: 20 days, 1 year, and 2 years after the harvesting period. A total of 2,853 invertebrates distributed across 40 taxa emerged after rewetting dry sediments over the experiment duration (58 days). The dominant invertebrates were microcrustaceans represented by 1,041 individuals and 17 species. Invertebrate richness and density on rice fields fallowed (i.e., dried) for 1 year were greater than that for rice fields drained 20 days and 2 years. Aquatic invertebrate composition varied between rice fields fallowed for 20 days compared to those that remained dry for 1 or 2 years. The existence of viable resting stages in dry rice sediments over all stages of the fallow phase should help guide wetland restoration initiatives in southern Brazil.

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“…Discussion The phenology of W. smithii within 1-year-old leaves was similar at all three sites. Only third-instar larvae that had overwintered were found in the leaves until May despite the fact that photoperiods capable of terminating diapause would have already occurred by mid-to late April at The Pas (R. A. Brust, unpublished data), Kenora (Smith and Brust 197 l), and Patricia Beach (near Pinawa; Evans and Brust 1972).…”

Section: Over-winter Survivalmentioning

confidence: 94%

“…As soon as temperatures are above 15"C, third-instar larvae that have overwintered resume development to fourth instar, pupae, and adults (Evans and Brust 1972).…”

Section: Over-winter Survivalmentioning

confidence: 99%

Phenology of the mosquito Wyeomyia smithii (Coq.) in Manitoba and Ontario

Farkas¹,

Brust²

1986

Can. J. Zool.

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FARKAS, M. J., and R. A. BRUST. 1986. Phenology of the mosquito Wyeomyia smithii (Coq .) in Manitoba and Ontario. Can. J.Zool. 64: 285-290. The phenology of Wyeomyia smithii (Coquillett) within the water-filled leaves of Sarracenia purpurea L. (the purple pitcher plant) was studied during 1983 in bogs near The Pas and Patricia Beach, Manitoba, and Kehora, Ontario. Larvae that overwintered developed into adults by early July, and females laid eggs in newly opened leaves, as well as in the previous year's leaves. The largest portion of the developing larvae (summer generation) entered a third-instar diapause by mid-August and remained in this instar until the following spring. A small percentage of the summer generation at each site continued their development to adults and may have given rise to another generation. The number of larvae per leaf was positively correlated with leaf size. Pupation rates as well as adult size and fecundity did not vary significantly amongst sites. Smaller and less fecund individuals emerged as the season progressed. Over-winter survival of larvae was low at Patricia Beach (9%) but relatively high at The Pas (68%) during the winter of 1983-1984; survival was moderate (32-50%) during 1984-1985 at both locations. Overwintering success is likely enhanced by an early winter snow cover which insulates the larvae from low ambient temperatures from October to December at these sites. FARKAS, M. J., et R. A. BRUST. 1986. Phenology of the mosquito Wyeomyia smithii (Coq.) in Manitoba and Ontario. Can. J. Zool. 64: 285-290. En 1983, la phCnologie de Wyeomyia smithii (Coquillett) dans les feuilles remplies d'eau de Sarracenia purpurea L. a fait l'objet d'une Ctude dans des tourbikres situCes prks de The Pas et de Patricia Beach, au Manitoba, et prks de Kenora en Ontario. Les individus qui avaient pass6 l'hiver sous forme de larves ont tous atteint le stade adulte avant le dCbut de juillet et les femelles ont pondu leurs oeufs dan; des feuilles nouvelles et aussi dans des feuilles de 19annCe prCcCdente. La plus grande partie des larves en dCveloppement (gCnCration d'CtC) ont subi une diapause de troisikme stade vers la mi-ao0t et sont demeurkes it ce stade jusqu'au printemps suivant. A chaque endroit, un petit pourcentage d'individus de la gCnCration d' CtC ont continu6 de se dCvelopper jusqu'au stade adulte et ont probablement donnC lieu B une autre gCnCration. Le nombre de larves par feuille Ctait en corrklation positive avec la taille de la,feuille. Les taux de nymphose, la taille des adultes et la fCconditC ne variaient pas significativement d'un endroit B l'autre. A mesure qu'avansait la saison, les individus devenaient plus petits et moins fkconds. La survie des larves B l'hiver s'est avCrCe faible B Patricia Beach (9%), mais relativement ClevCe B The Pas (68%) au cours de l'hiver 1983-1984; la survie a Ct C moyenne (32-50%) aux deux endroits au cours de l'hiver 1984-1985. La survie B I'hiver est probablement favorisCe lorsque ia premitre neige tombe t6t et isole les larves des tempkratures ...

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INDUCTION AND TERMINATION OF DIAPAUSE IN WYEOMYIA SMITHII (DIPTERA: CULICIDAE), AND LARVAL SURVIVAL STUDIES AT LOW AND SUBZERO TEMPERATURES

Cited by 38 publications

References 5 publications

Ecology and Evolution of the Pitcher‐plant Mosquito. 3. Resource Tracking by a Natural Population

Ecology and Evolution of the Pitcher‐plant Mosquito. 3. Resource Tracking by a Natural Population

Do Hydrologic Regimes Used in Rice Fields Compromise the Viability of Resting Stages of Aquatic Invertebrates?

Phenology of the mosquito Wyeomyia smithii (Coq.) in Manitoba and Ontario

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