Quantifying the Influence of Larval Density on Disease Transmission Indices in<i>Culex quinquefasciatus</i>, the Major African Vector of Filariasis

Ukubuiwe, Azubuike Christian; Ojianwuna, Cynthia C.; Olayemi, Israel Kayode; Arimoro, Francis O.; Omalu, I. C. J.; Ukubuiwe, Chinenye Catherine; Baba, Bulus Musa

doi:10.1177/1179543319856022

Cited by 8 publications

(7 citation statements)

References 63 publications

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“…funestus under laboratory conditions in different geographical areas. The longevity and survival of the resultant adults were not investigated in this study as previous studies have revealed negative effects of high larval density on post‐emergence adult longevity and survival (Ombok et al, 2002; Reiskind & Lounibos, 2009; Ukubuiwe et al, 2019). However, this needs to be confirmed in this species.…”

Section: Discussionmentioning

confidence: 99%

Effect of larval density and additional anchoring surface on the life‐history traits of a laboratory colonized Anopheles funestus strain

Zengenene

Munhenga

Okumu

et al. 2022

Medical Vet Entomology

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Optimal rearing conditions, inclusive of larval rearing density, are critical for sustained mosquito productivity. There is limited information on favourable conditions for the larval rearing of Anopheles funestus, the dominant malaria vector in east and southern Africa. This work investigated the effects of larval rearing densities and additional anchoring surface on An. funestus development using a life table approach. Larval cohorts were reared at four different larval densities using the same rearing surface area, larval food concentrations and temperature conditions. Rearing larvae at high densities extended the larval developmental time and reduced adult productivity. Adding an extra larval anchoring surface when rearing larvae at high density resulted in extended larval developmental time, increased larval survivorship and produced bigger adults. These findings improve our understanding of the relationship between larval density and developmental traits in An. funestus and provides baseline information for An. funestus rearing under laboratory conditions.

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Section: Discussionmentioning

confidence: 99%

Effect of larval density and additional anchoring surface on the life‐history traits of a laboratory colonized Anopheles funestus strain

Zengenene

Munhenga

Okumu

et al. 2022

Medical Vet Entomology

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“…In Cx. quinquefasciatus, fourth larval instars were most affected by increasing larval density, and resulted in reduced rate of larval growth and immature life survivorship of the species [126]. These authors opined that high larval densities induce stress and reduced feed intake due to competition, with reduction in metabolic reserves.…”

Section: Larval Density/overcrowdingmentioning

confidence: 99%

“…aegypti [125]. Overcrowding conditions increase larval development times [121], but reduce the size of the mature larva, pupa and resulting adult [126], with its attendant effects on the fecundity of females [127].…”

Section: Larval Density/overcrowdingmentioning

confidence: 99%

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Environmental Manipulation: A Potential Tool for Mosquito Vector Control

Christian¹,

Kayode²,

Chinenye³

et al. 2021

The Wonders of Diptera - Characteristics, Diversity, and Significance for the World's Ecosystems

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Mosquito borne diseases have continued to ravage man and his animals despite efforts to curb its spread. The use of chemicals has been the main thrust for control of all life stages of mosquitoes. Increased resistance to commonly used insecticides has called for renewed effort for vector control. Environmental management for vector control is one of the new strategies developed to tackle the menace of vectors. Manipulation of abiotic factors has widely gained acceptance due to laboratory and semi-field trials and findings. In this chapter, we reviewed literatures on some critical abiotic factors and their effects on bionomics and biological fitness of immature and adult life stages of mosquito species. We also looked at prospects for developing protocols based on these findings.

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“…Likewise, larvae raised with rapidly decaying plant detritus have similarly better larval performance than larvae raised with slow-decaying plant detritus [14,15,16,17]. In turn, differences in larval performance as a result of detritus type have been related to adult body size [13,14,18] and survival [17,19], while variation in available larval food resources more generally have also been related to fecundity [20,21,22], biting rate [23], and susceptibility to viral infection [24,25,26], all of which are expected to affect disease transmission at the individual and population scales [27,28,29,30,31,32]. Although resource competition is often the dominant ecological process regulating mosquito populations in ephemeral habitats, populations may also be regulated by abiotic factors, including litter-based toxins.…”

Section: Introductionmentioning

confidence: 99%

Effects of Detritus on the Mosquito Culex pipiens: Phragmites and Schedonorus (Festuca) Invasion Affect Population Performance

Leisnham

Scott

Baldwin

et al. 2019

IJERPH

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Species interactions that influence the performance of the exotic mosquito Culex pipiens can have important effects on the transmission risk of West Nile virus (WNV). Invasive plants that alter the vegetation communities of ephemeral ground pools may facilitate or resist the spread of C. pipiens (L.) by altering allochthonous inputs of detritus in those pools. To test this hypothesis, we combined field surveys of roadside stormwater ditches with a laboratory microcosm experiment to examine relationships between C. pipiens performance and water quality in systems containing detritus from invasive Phragmites australis (Cav.) Trin. Ex Steud., introduced Schedonorus arundinaceus (Schreb.) Dumort., or native Juncus effusus L. or Typha latifolia L. In ditches, C. pipiens abundance was unrelated to detritus species but female C. pipiens were significantly larger from ditches with S. arundinaceus and smaller with J. effusus. Larger and smaller C. pipiens were also produced in microcosms provisioned with S. arundinaceus and J. effusus, respectively, yet the per capita rate of population of change did not vary. Larger females from habitats with S. arundinaceus were likely caused by faster decay rates of S. arundinaceus and resultant increases in microbial food, but lower survival as a result of fouling and higher tannin-lignin concentrations resulted in little changes to overall population performance. Larger female mosquitoes have been shown to have greater potential for transmitting arboviruses. Our findings suggest that changed community-level interactions from plant invasions in urban ephemeral ground pools can affect the fitness of C. pipiens and possibly increase WNV risk.

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Quantifying the Influence of Larval Density on Disease Transmission Indices inCulex quinquefasciatus, the Major African Vector of Filariasis

Cited by 8 publications

References 63 publications

Effect of larval density and additional anchoring surface on the life‐history traits of a laboratory colonized Anopheles funestus strain

Effect of larval density and additional anchoring surface on the life‐history traits of a laboratory colonized Anopheles funestus strain

Environmental Manipulation: A Potential Tool for Mosquito Vector Control

Effects of Detritus on the Mosquito Culex pipiens: Phragmites and Schedonorus (Festuca) Invasion Affect Population Performance

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