When mothers anticipate: Effects of the prediapause stage on embryo development time and of maternal photoperiod on eggs of a temperate and a tropical strains of Aedes albopictus (Diptera: Culicidae)

Lacour, Guillaume; Vernichon, Florian; Cadilhac, N.; Boyer, Sébastien; Lagneau, Christophe; Hance, Thierry

doi:10.1016/j.jinsphys.2014.10.008

Cited by 53 publications

(40 citation statements)

References 53 publications

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“…Furthermore, variations in Ae. albopictus eggs width and volume depend on the day length to which mothers are exposed (Lacour et al, 2014). In the present work, no relation …”

Section: Discussioncontrasting

confidence: 44%

Physical features and chitin content of eggs from the mosquito vectors Aedes aegypti, Anopheles aquasalis and Culex quinquefasciatus: Connection with distinct levels of resistance to desiccation

Farnesi

Menna-Barreto

Martins

et al. 2015

Journal of Insect Physiology

101

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Mosquito eggs are laid in water but freshly laid eggs are susceptible to dehydration, if their surroundings dry out at the first hours of development. During embryogenesis of different mosquito vectors the serosal cuticle, an extracellular matrix, is produced; it wraps the whole embryo and becomes part of the eggshell. This cuticle is an essential component of the egg resistance to desiccation (ERD). However, ERD is variable among species, sustaining egg viability for different periods of time. While Aedes aegypti eggs can survive for months in a dry environment (high ERD), those of Anopheles aquasalis and Culex quinquefasciatus in the same condition last, respectively, for one day (medium ERD) or a few hours (low ERD). Resistance to desiccation is determined by the rate of water loss, dehydration tolerance and total amount of water of a given organism. The ERD variability observed among mosquitoes probably derives from diverse traits. We quantified several attributes of whole eggs, potentially correlated with the rate of water loss: length, width, area, volume, area/volume ratio and weight. In addition, some eggshell aspects were also evaluated, such as absolute and relative weight, weight/area relationship (herein called surface density) and chitin content. Presence of chitin specifically in the serosal cuticle as well as aspects of endochorion external surface were also investigated. Three features could be related to differences on ERD levels: chitin content, directly related to ERD, the increase in the egg volume during embryogenesis and the eggshell surface density, which were both inversely related to ERD. Although data suggest that the amount of chitin in the eggshell is relevant for egg impermeability, the participation of other yet unidentified eggshell attributes must be considered in order to account for the differences in the ERD levels observed among Ae. aegypti, An. aquasalis and Cx. quinquefasciatus.

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“…Furthermore, variations in Ae. albopictus eggs width and volume depend on the day length to which mothers are exposed (Lacour et al, 2014). In the present work, no relation …”

Section: Discussioncontrasting

confidence: 44%

Physical features and chitin content of eggs from the mosquito vectors Aedes aegypti, Anopheles aquasalis and Culex quinquefasciatus: Connection with distinct levels of resistance to desiccation

Farnesi

Menna-Barreto

Martins

et al. 2015

Journal of Insect Physiology

101

View full text Add to dashboard Cite

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“…are known to influence the duration of embryo development in several taxa with diapausing stages (e.g. rotifers: Martinez-Ruiz & Garcia-Roger, 2015; crustaceans: Van Dooren & Brendonck, 1998;Allen, 2010;insects: Mousseau & Dingle, 1991;Lacour et al, 2014). Maternal effects in the form of age-related differential maternal provisioning, changes in maternal hormonal levels and/or other regulatory substances such as miRNA or cytoplasmic factors have been proposed as modulating developmental trajectory in terms of facultative onset or omission of diapause in the Neotropical annual fish Austrofundulus limnaeus (Podrabsky et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Maternal source of variability in the embryo development of an annual killifish

Polačik

Smith

Reichard

2017

J of Evolutionary Biology

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Organisms inhabiting unpredictable environments often evolve diversified reproductive bethedging strategies, expressed as production of multiple offspring phenotypes, thereby avoiding complete reproductive failure. To cope with unpredictable rainfall, African annual killifish from temporary savannah pools lay drought-resistant eggs that vary widely in the duration of embryo development. We examined the sources of variability in the duration of individual embryo development, egg production and fertilization rate in Nothobranchius furzeri. Using a quantitative genetics approach (North Carolina Type II design) we found support for maternal effects rather than polyandrous mating as the primary source of the variability in the duration of embryo development. The number of previously laid eggs appeared to serve as an internal physiological cue initiating a shift from rapid to slow embryo developmental mode. In annual killifish extensive phenotypic variability in progeny traits is adaptive, as the conditions experienced by parents have limited relevance to the offspring generation. In contrast to genetic control, with high phenotypic expression and heritability, maternal control of traits under natural selection prevents standing genetic diversity from potentially detrimental effects of selection in fluctuating environments.

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“…Based on the functioning of virus-vector systems and without involving vertebrate hosts, arbovirus maintenance by vertical transmission implicates drought-resistant resting eggs of infected mosquitoes (genus Aedes ) [108]. During a long inter-epizootic period, this mechanism is improbable in Culex , because of egg desiccation, but likely to occur in Aedes , as their eggs are resistant [27, 61]. Hence, WNV maintenance by vertical transmission is possible in Madagascar for Ae .…”

Section: Enzootic Circulation and Wnv Maintenancementioning

confidence: 99%

Review of West Nile virus circulation and outbreak risk in Madagascar: Entomological and ornithological perspectives

2016

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West Nile fever (WNF) is a zoonotic disease, occurring nearly globally. In Madagascar, West Nile virus (WNV) was first detected in 1978 from wild birds and the virus is currently distributed across the island, but no epidemic or epizootic period has been recorded. One fatal human case of WNV infection was reported in 2011, suggesting a “tip of the iceberg” phenomenon of a possible WNF epidemic/epizootic on the island. The main objective of this literature-based survey is to review patterns of WNV circulation in Madagascar from the entomological and ornithological points of view. Among the 235 mosquito species described from Madagascar, 29 species are widely associated with WNV infection; 16 of them are found naturally infected with WNV on the island and categorized into major, candidate, and potential vectors of WNV according to their vector capacity. This study upholds the hypothesis that WNV enzooticity is independent of annual movements of migratory birds passing through Madagascar. Moreover, the lack of regular migratory bird flux between Africa and Madagascar would reduce the probability of transmission and the subsequent reintroduction of the virus into locally occurring mosquito species. Given that Palearctic migratory birds are strongly implicated in the transmission of WNV, we highlight notable differences in the movements and species diversity of these birds in Madagascar as compared to eastern and northern Africa. Risk factors from this two-pronged approach are presented for the emergence of WNF outbreak.

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When mothers anticipate: Effects of the prediapause stage on embryo development time and of maternal photoperiod on eggs of a temperate and a tropical strains of Aedes albopictus (Diptera: Culicidae)

Cited by 53 publications

References 53 publications

Physical features and chitin content of eggs from the mosquito vectors Aedes aegypti, Anopheles aquasalis and Culex quinquefasciatus: Connection with distinct levels of resistance to desiccation

Physical features and chitin content of eggs from the mosquito vectors Aedes aegypti, Anopheles aquasalis and Culex quinquefasciatus: Connection with distinct levels of resistance to desiccation

Maternal source of variability in the embryo development of an annual killifish

Review of West Nile virus circulation and outbreak risk in Madagascar: Entomological and ornithological perspectives

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