scholarly journals Effects of density dependent larval competition on the life history traits of Aedes aegypti and Aedes albopictus (Diptera: Culicidae)

2017 ◽  
Vol 49 (1) ◽  
pp. 97 ◽  
Author(s):  
Sampa Banerjee ◽  
Soujita Pramanik ◽  
Soumyajit Banerjee ◽  
Goutam K. Saha ◽  
Gautam Aditya
Keyword(s):  
Life History ◽  
Aedes Aegypti ◽  
Life History Traits ◽  
Population Level ◽  
Competitive Interactions ◽  
Pupal Weight ◽  
Larval Competition ◽  
Density Dependent ◽  
Geographical Regions ◽  
F2 Generation

Consequences of larval competition at the population level provide explanation for the differences in relative abundance of <em>Aedes aegypti</em> and <em>Aedes</em> <em>albopictus</em> in different geographical regions. The outcome of competition is assessed through the estimates of the life history traits as a response to varying density and resource available for larval development. In the present study, variations in the life history traits due to density-dependent intra- and inter- specific competition involving <em>A. aegypti</em> and <em>A. albopictus</em> were assessed following the minimalist model. The instar-I larvae (0-day old F2 generation) of both <em>Aedes</em> species were reared to the adult stages using the initial rearing density of 1, 2, 4 and 6 (individuals/10ml) in multiple replicates. The age at pupation, pupal weight, adult weight and adult wing length of the individuals were considered as the response variables and surrogates of estimating the competitive interactions. Density dependent variations in the competitive interactions were evident for both the mosquitoes with reference to the selected life history traits. In <em>A. aegypti,</em> the life history traits varied with the levels of competition, which was not observed for <em>A. albopictus</em>. Although the density levels considered in the present instance were lower than in earlier studies, the observations were similar, with <em>A. albopictus</em> being competitively superior. It appears that irrespective of the density levels, interspecific competition affects <em>A. aegypti</em> and thus may bear population level consequences and overall abundance in the areas where both species are present.

scholarly journals Effect of food types on competitive interaction between Aedes aegypti (LINNAEUS, 1762) and Ae. albopictus (SKUSE, 1894) (Diptera, Culicidae): a proximate level appraisal

2017 ◽  
Vol 86 (2) ◽  
pp. 99-118 ◽  
Author(s):  
Sampa Banerjee ◽  
Sushree Mohan ◽  
Soujita Pramanik ◽  
Soumyajit Banerjee ◽  
Goutam K. Saha ◽  
...  
Keyword(s):  
Life History ◽  
Aedes Aegypti ◽  
Interspecific Competition ◽  
Food Quality ◽  
Population Characteristics ◽  
Competitive Interactions ◽  
Food Type ◽  
Pupal Weight ◽  
Fish Food ◽  
Larval Habitats

AbstractCompetitive interactions between coexisting Aedes aegypti and Ae. albopictus have been implied as a crucial factor shaping life history traits and population characteristics. The overlap in resource requirements and similarities in the life history strategies of the two Aedes mosquitoes form a basis for competitive interactions. In the present study, the role of the food quality of the larval habitats in influencing the outcome of competition between Ae. aegypti and Ae. albopictus is evaluated to highlight food quality as a basis for asymmetric competitive outcomes. Instar I larvae of the two mosquitoes were reared using conspecifics or heterospecifics of constant size and equal ratio with four different food types: boiled rice, boiled pulses, a mixture of boiled rice and pulses, and fish food. Competitive interactions were evaluated using age at pupation (AP), pupal weight (PW), dry adult weight (AW) and wing length (WL) with respect to intra- and interspecific competition for the two sexes of each mosquito species. The results show that Ae. albopictus developed faster but achieved a smaller size compared to Ae. aegypti under interspecific competition conditions, the extent of the difference varying significantly with the food type. Given the variety of food resources available in the small container larval habitats, the results of the study imply that food quality may act differentially with respect to larval development and adult body size, depending on the conspecifics or heterospecifics and on the sex of the species concerned. The dominance of one species over the other may also be a consequence of the resource utilization pattern that varies in the larval habitats.

scholarly journals Male competition and the evolution of mating and life-history traits in experimental populations of Aedes aegypti

2019 ◽  
Vol 286 (1904) ◽  
pp. 20190591 ◽  
Author(s):  
Alima Qureshi ◽  
Andrew Aldersley ◽  
Brian Hollis ◽  
Alongkot Ponlawat ◽  
Lauren J. Cator
Keyword(s):  
Life History ◽  
Aedes Aegypti ◽  
Mating Success ◽  
Life History Traits ◽  
Male Competition ◽  
Male Mating ◽  
Male Mating Success ◽  
Reproductive Control ◽  
Evolutionary Response ◽  
Mating Conditions

Aedes aegypti is an important disease vector and a major target of reproductive control efforts. We manipulated the opportunity for sexual selection in populations of Ae . aegypti by controlling the number of males competing for a single female. Populations exposed to higher levels of male competition rapidly evolved higher male competitive mating success relative to populations evolved in the absence of competition, with an evolutionary response visible after only five generations. We also detected correlated evolution in other important mating and life-history traits, such as acoustic signalling, fecundity and body size. Our results indicate that there is ample segregating variation for determinants of male mating competitiveness in wild populations and that increased male mating success trades-off with other important life-history traits. The mating conditions imposed on laboratory-reared mosquitoes are likely a significant determinant of male mating success in populations destined for release.

Lack of relationship between simulated fish population responses and their life history traits: inadequate models, incorrect analysis, or site-specific factors?

2005 ◽  
Vol 62 (4) ◽  
pp. 886-902 ◽  
Author(s):  
Kenneth A Rose
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Lake Trout ◽  
Fish Population ◽  
Population Models ◽  
Site Specific ◽  
Density Dependent ◽  
Population Responses ◽  
Adult Growth ◽  
Specific Factors

Relationships between fish population responses to changes in their vital rates and commonly available life history traits would be a powerful screening tool to guide management about species vulnerability, to focus future data collection on species and life stages of concern, and to aid in designing effective habitat enhancements. As an extension of previous analyses by others, I analyzed the responses to changes in fecundity and yearling survival of age-structured matrix and individual-based population models of 17 populations comprising 10 species. Simulations of the matrix models showed that the magnitude of population responses, but not the relative order of species sensitivity, depended on the state (sustainable or undergoing excessive removals) of the population. Matrix and individual-based models predicted population responses that appeared to be unrelated to their species-level life history traits when responses were plotted on a three-end-point life history surface. Density-dependent adult growth was added to the lake trout (Salvelinus namaycush) matrix model, and simulations demonstrated the potential importance to predicted responses of density-dependent processes outside the usual spawner–recruit relationship. Four reasons for the lack of relationship between population responses and life history traits related to inadequate population models, incorrect analysis, inappropriate life history model, and important site-specific factors are discussed.

scholarly journals Intraspecific phenotypic variation in life history traits ofDaphnia galeatapopulations in response to fish kairomones

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5746 ◽  
Author(s):  
Verena Tams ◽  
Jennifer Lüneburg ◽  
Laura Seddar ◽  
Jan-Phillip Detampel ◽  
Mathilde Cordellier
Keyword(s):  
Life History ◽  
Environmental Change ◽  
Phenotypic Variation ◽  
Life History Traits ◽  
Common Garden ◽  
Population Level ◽  
Geometric Morphometric ◽  
Fish Kairomones ◽  
Geometric Morphometric Analysis ◽  
Clonal Lines

Phenotypic plasticity is the ability of a genotype to produce different phenotypes depending on the environment. It has an influence on the adaptive potential to environmental change and the capability to adapt locally. Adaptation to environmental change happens at the population level, thereby contributing to genotypic and phenotypic variation within a species. Predation is an important ecological factor structuring communities and maintaining species diversity. Prey developed different strategies to reduce their vulnerability to predators by changing their behaviour, their morphology or their life history. Predator-induced life history responses inDaphniahave been investigated for decades, but intra-and inter-population variability was rarely addressed explicitly. We addressed this issue by conducting a common garden experiment with 24 clonal lines of EuropeanDaphnia galeataoriginating from four populations, each represented by six clonal lines. We recorded life history traits in the absence and presence of fish kairomones. Additionally, we looked at the shape of experimental individuals by conducting a geometric morphometric analysis, thus assessing predator-induced morphometric changes. Our data revealed high intraspecific phenotypic variation within and between fourD. galeatapopulations, the potential to locally adapt to a vertebrate predator regime as well as an effect of the fish kairomones on morphology ofD. galeata.

An eco-physiological model of the impact of temperature on Aedes aegypti life history traits

2012 ◽  
Vol 58 (12) ◽  
pp. 1597-1608 ◽  
Author(s):  
Harish Padmanabha ◽  
Fabio Correa ◽  
Mathieu Legros ◽  
H. Fredrick Nijhout ◽  
Cynthia Lord ◽  
...  
Keyword(s):  
Life History ◽  
Aedes Aegypti ◽  
Life History Traits ◽  
Physiological Model ◽  
The Impact

Interaction of a pesticide and larval competition on life history traits of Culex pipiens

Acta Tropica ◽  
2010 ◽  
Vol 116 (2) ◽  
pp. 141-146 ◽  
Author(s):  
Ephantus J. Muturi ◽  
Katie Costanzo ◽  
Banugopan Kesavaraju ◽  
Richard Lampman ◽  
Barry W. Alto
Keyword(s):  
Life History ◽  
Culex Pipiens ◽  
Life History Traits ◽  
Larval Competition

Impact of micropollutants on the life-history traits of the mosquito Aedes aegypti: On the relevance of transgenerational studies

2017 ◽  
Vol 220 ◽  
pp. 242-254 ◽  
Author(s):  
Sophie M. Prud'homme ◽  
Arnaud Chaumot ◽  
Eva Cassar ◽  
Jean-Philippe David ◽  
Stéphane Reynaud
Keyword(s):  
Life History ◽  
Aedes Aegypti ◽  
Life History Traits
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