Effect of Malathion on Larval Competition Between Aedes albopictus and Aedes atropalpus (Diptera: Culicidae)

2011 ◽  
Vol 48 (2) ◽  
pp. 479-484 ◽  
Author(s):  
Banugopan Kesavaraju ◽  
Christopher W. Brey ◽  
Ary Farajollahi ◽  
Heather L. Evans ◽  
Randy Gaugler
Keyword(s):  
Aedes Albopictus ◽  
Larval Competition ◽  
Aedes Atropalpus

scholarly journals Oviposition site attraction of Aedes albopictus to sites with conspecific and heterospecific larvae during an ongoing invasion in Medellín, Colombia

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Talya Shragai ◽  
Laura Harrington ◽  
Catalina Alfonso-Parra ◽  
Frank Avila
Keyword(s):  
Open Field ◽  
Aedes Albopictus ◽  
Competitive Exclusion ◽  
Oviposition Preference ◽  
Ecological Niches ◽  
Low Density ◽  
Larval Competition ◽  
Field Cage ◽  
Main Hypothesis ◽  
Oviposition Sites

Abstract Background Aedes aegypti and Aedes albopictus are two globally invasive vectors with similar ecological niches. Encounters between them can result in either competitive exclusion or stable co-existence, but it is unclear what drives these variable outcomes. Larval competition in favor of Ae. albopictus is a main hypothesis for the competitive exclusion of Ae. aegypti observed in some regions. However, the role of oviposition preference in determining the degree of competitive larval interactions in the field is not well understood. In this study, we used a combination of mark-release-recapture methods with ovitraps in the open-field and a semi-field cage to test whether gravid Ae. albopictus seek oviposition sites in response to the presence, species, and density of either conspecific or heterospecific Ae. aegypti larvae in the aquatic habitat. We conducted our study in Medellín, Colombia, where Ae. aegypti is a long-term resident and Ae. albopictus is a recent invader. Results In the open-field and semi-field cage experiments, gravid Ae. albopictus showed strong preference for ovitraps with larvae over those without. They consistently preferred ovitraps with higher density of conspecific (Ae. albopictus) larvae and low density of heterospecific (Ae. aegypti) larvae over traps with no larvae or high density of heterospecific (Ae. aegypti) larvae. In the semi-field cage experiment, traps with low density of Ae. albopictus were not preferred more or less than any other trap, but in the open-field experiment they were preferred over traps without larvae. Conclusions We demonstrate, through open-field and semi-field cage experiments, that Ae. albopictus are more attracted to oviposition sites with larvae and that the combination of species and density of larvae influence attraction. This demonstrated preference could increase interspecific larval competition as Ae. albopictus actively seek containers with conspecific and heterospecific larvae. Any resulting competition with Ae. aegypti may favor one species over the other and alter the distribution or abundance of both. Because these species vary in vectorial capacity and insecticide resistance, effects of interspecific competition could ultimately impact arbovirus transmission rates and the success of vector control efforts.

scholarly journals Larval competition between Aedes japonicus and Aedes atropalpus (Diptera: Culicidae) in simulated rock pools

2008 ◽  
Vol 33 (2) ◽  
pp. 238-246 ◽  
Author(s):  
Jennifer S. Armistead ◽  
Naoya Nishimura ◽  
Richard L. Escher ◽  
L. Philip Lounibos
Keyword(s):  
Rock Pools ◽  
Larval Competition ◽  
Aedes Japonicus ◽  
Aedes Atropalpus

Evaluating Larval Competition Between Aedes albopictus and A. triseriatus (Diptera: Culicidae) through Replacement Series Experiments

1993 ◽  
Vol 22 (2) ◽  
pp. 311-318 ◽  
Author(s):  
Mark G. Novak ◽  
Leon G. Higley ◽  
Carl A. Christianssen ◽  
Wayne A. Rowley
Keyword(s):  
Aedes Albopictus ◽  
Larval Competition ◽  
Replacement Series

Weak Larval Competition Between Two Invasive Mosquitoes Aedes koreicus and Aedes albopictus (Diptera: Culicidae)

2017 ◽  
Vol 54 (5) ◽  
pp. 1266-1272 ◽  
Author(s):  
Frédéric Baldacchino ◽  
Daniele Arnoldi ◽  
Charlotte Lapère ◽  
Roberto Rosà ◽  
Fabrizio Montarsi ◽  
...  
Keyword(s):  
Aedes Albopictus ◽  
Larval Competition ◽  
Aedes Koreicus ◽  
Invasive Mosquitoes

scholarly journals The ecological and epidemiological consequences of reproductive interference between the vectors Aedes aegypti and Aedes albopictus

2019 ◽  
Vol 16 (156) ◽  
pp. 20190270 ◽  
Author(s):  
Robert S. Paton ◽  
Michael B. Bonsall
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Reproductive Interference ◽  
Larval Competition ◽  
Vector Ecology ◽  
Vector Borne Diseases ◽  
Behavioural Responses ◽  
Competitive Mechanisms ◽  
Vector Borne ◽  
Mosquito Population Dynamics

Vector ecology is integral to understanding the transmission of vector-borne diseases, with processes such as reproduction and competition pivotal in determining vector presence and abundance. The arbovirus vectors Aedes aegypti and Aedes albopictus compete as larvae, but this mechanism is insufficient to explain patterns of coexistence and exclusion. Inviable interspecies matings—known as reproductive interference—is another candidate mechanism. Here, we analyse mathematical models of mosquito population dynamics and epidemiology which include two Aedes -specific features of reproductive interference. First, as these mosquitoes use hosts to find mates, reproductive interference will only occur if the same host is visited. Host choice will, in turn, be determined by behavioural responses to host availability. Second, females can become sterilized after mis-mating with heterospecifics. We find that a species with an affinity for a shared host will suffer more from reproductive interference than a less selective competitor. Costs from reproductive interference can be ‘traded-off’ against costs from larval competition, leading to competitive outcomes that are difficult to predict from empirical evidence. Sterilizations of a self-limiting species can counterintuitively lead to higher densities than a competitor suffering less sterilization. We identify that behavioural responses and reproductive interference mediate a concomitant relationship between vector ecological dynamics and epidemiology. Competitors with opposite behavioural responses can maintain disease where human hosts are rare, due to vector coexistence facilitated by a reduced cost from reproductive interference. Our work elucidates the relative roles of the competitive mechanisms governing Aedes populations and the associated epidemiological consequences.

scholarly journals The ecological and epidemiological consequences of reproductive interference between the vectors Aedes aegypti and Aedes albopictus

2019 ◽  
Author(s):  
Robert S Paton ◽  
Michael B Bonsall
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Reproductive Interference ◽  
Larval Competition ◽  
Vector Ecology ◽  
Functional Responses ◽  
Vector Borne Diseases ◽  
Competitive Mechanisms ◽  
Vector Borne ◽  
Mosquito Population Dynamics

AbstractVector ecology is integral to understanding the transmission of vector-borne diseases, with processes such as reproduction and competition pivotal in determining vector presence and abundance. The arbovirus vectors Aedes aegypti and Aedes albopictus compete as larvae, but this mechanism is insufficient to explain patterns of coexistence and exclusion. Inviable interspecies matings - known as reproductive interference - is another candidate mechanism. Here, we analyse mathematical models of mosquito population dynamics and epidemiology which include two Aedes-specific features of reproductive interference. First, as these mosquitoes use hosts to find mates, reproductive interference will only occur if the same host is visited. Host choice will, in turn, be determined by functional responses to host availability. Second, females can become sterilised after mis-mating with heterospecifics. We find that a species with an affinity for a shared host will suffer more from reproductive interference than a less selective competitor. Costs from reproductive interference can be “traded-off” against costs from larval competition, leading to competitive outcomes difficult to predict from empirical evidence. Sterilisations of a self-limiting species can counter-intuitively lead to higher densities than a competitor suffering less sterilisation. We identify that functional responses and reproductive interference mediate a concomitant relationship between vector ecological dynamics and epidemiology. Competitors with opposite functional responses can maintain disease where human hosts are rare, due to vector coexistence facilitated by a reduced cost from reproductive interference. Our work elucidates the relative roles of the competitive mechanisms governing Aedes populations and the associated epidemiological consequences.

scholarly journals Interspecific Larval Competition Between Aedes albopictus and Aedes japonicus (Diptera: Culicidae) in Northern Virginia

2008 ◽  
Vol 45 (4) ◽  
pp. 629-637 ◽  
Author(s):  
J. S. Armistead ◽  
J. R. Arias ◽  
N. Nishimura ◽  
L. P. Lounibos
Keyword(s):  
Aedes Albopictus ◽  
Larval Competition ◽  
Aedes Japonicus
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