scholarly journals Diversity Of Mosquito Species Ovipositing In Different Zones of Light Intensity Within Limestone Caves In Thailand

2018 ◽  
Vol 34 (3) ◽  
pp. 182-189
Author(s):  
Thavin Bodharamik ◽  
Waraporn Juntarajumnong ◽  
Chamnarn Apiwathnasorn ◽  
Sungsit Sungvornyothin ◽  
Uraiwan Arunyawat
Keyword(s):  
Climate Change ◽  
Site Selection ◽  
Abiotic Factors ◽  
Mosquito Species ◽  
Population Abundance ◽  
Oviposition Site Selection ◽  
Natural Habitats ◽  
Mosquito Abundance ◽  
Mosquito Oviposition ◽  
Annual Distribution

ABSTRACT Climate change and human activity affect the geographical and annual distribution and population abundance of mosquitoes. As natural habitats are reduced, it is hypothesized that mosquitoes may seek refuge in more stable environments such as cave habitats. Therefore, we explored the species diversity of mosquitoes exploiting cave habitats in Thailand. Ten species belonging to 4 genera were collected, of which none were considered to be true cave-dwelling species (Troglobiont). The known cavernicolous species, Aedes cavaticus, was observed to oviposit outside of the cave and therefore should be categorized as a subtroglophilic species. Other species were also oviposited inside the cave but should be regarded as trogloxenic species. There was no clear association between environmental factors and mosquito abundance inside the 4 limestone caves, except for Ae. cavaticus, which was positively correlated with rainfall. This study indicates that different biotic or abiotic factors may be involved in mosquito oviposition site selection inside caves.

scholarly journals Dynamics and Distribution of the Invasive Mosquito Aedes koreicus in a Temperate European City

2020 ◽  
Vol 17 (8) ◽  
pp. 2728
Author(s):  
Kornélia Kurucz ◽  
Mattia Manica ◽  
Luca Delucchi ◽  
Gábor Kemenesi ◽  
Giovanni Marini
Keyword(s):  
Mathematical Model ◽  
Abiotic Factors ◽  
Mosquito Species ◽  
Temperature Dependent ◽  
Aedes Koreicus ◽  
Mosquito Abundance ◽  
Invasive Mosquito ◽  
Summer Temperatures ◽  
The City ◽  
Blood Meals

Aedes koreicus is a mosquito species native to Asia that has recently successfully invaded new areas in several European countries. Here, we provide important data on Ae. koreicus establishment in Pécs (Southern Hungary). Mosquito surveillance was carried out weekly between 2016 and 2019 at 10 different sites located throughout the city from May to September. We conducted a statistical analysis to evaluate the most important abiotic factors driving Ae. koreicus abundance. We then calibrated a previously developed temperature-dependent mathematical model to the recorded captures to evaluate mosquito abundance in the study area. We found that too high summer temperatures negatively affect mosquito abundance. The model accurately replicated the observed capture patterns, providing an estimate of Ae. koreicus density for each breeding season, which we interpolated to map Ae. koreicus abundance throughout Pécs. We found a negative correlation between mosquito captures and human density, suggesting that Ae. koreicus does not necessarily require humans for its blood meals. Our study provides a successful application of a previously published mathematical model to investigate Ae. koreicus population dynamics, proving its suitability for future studies, also within an epidemiological framework.

Effects of salinity on site selection by ovipositing Aedes togoi (Diptera: Culicidae)

1979 ◽  
Vol 57 (3) ◽  
pp. 593-596 ◽  
Author(s):  
R. M. Trimble ◽  
W. G. Wellington
Keyword(s):  
Larval Development ◽  
Site Selection ◽  
Mosquito Species ◽  
Oviposition Site ◽  
Distilled Water ◽  
Oviposition Site Selection ◽  
Salt Solutions ◽  
Aedes Togoi ◽  
Embryonic And Larval Development

Two ranges of salinities, 0, 5, 10, 20, 40, and 20, 25, 30, 35, 40 g NaCl/L were tested for their effect on oviposition site selection by colonized Aedes togoi. No preference was shown between distilled water and salt solutions of 5, 10, and 20 g NaCl/L, but females strongly avoided the 40 g NaCl/L solution. Females showed increased avoidance of salt solutions for oviposition as salinity increased from 20–40 g NaCl/L. These results are discussed in relation to similar studies with Ae. togoi and other mosquito species and in relation to embryonic and larval development of Ae. togoi.

Oviposition-site selection by the toad Melanophryniscus rubriventris in an unpredictable environment in Argentina

2006 ◽  
Vol 84 (5) ◽  
pp. 699-705 ◽  
Author(s):  
F.J. Goldberg ◽  
S. Quinzio ◽  
M. Vaira
Keyword(s):  
Site Selection ◽  
Abiotic Factors ◽  
Breeding Site ◽  
Oviposition Site ◽  
Offspring Survival ◽  
Oviposition Site Selection ◽  
Forest Environment ◽  
Ephemeral Ponds ◽  
Unpredictable Environment ◽  
Oviposition Sites

Oviposition-site selection plays an important role in the reproductive success of amphibians. In unpredictable environments where resources vary within a season, amphibians should select oviposition sites using parameters that can be easily evaluated, or spawn in several ponds to increase offspring survival. Melanophryniscus rubriventris (Vellard, 1947) uses shallow ephemeral ponds in an unpredictable montane-forest environment. During 40 consecutive days, we surveyed potential spawning sites and measured several biotic and abiotic factors to determine if any of these factors influenced breeding-site selection. We also described the spawning behavior of this species. Water temperature and pond level (flooded or not) were significant predictors of whether a pond was used or not. Warmer ponds would permit accelerated development of larvae in habitats where ponds are ephemeral and their presence unpredictable. Because of the short and unpredictable hydroperiods, it will be better to select a pond full of water instead of evaluating other pond characteristics that can be very variable. Mating pairs spread several egg masses to different sites but in the same pond. This behavior is likely a consequence of pairs avoiding interactions with intruding males and not as a strategy to enhance offspring survival.

Effect of desiccation on mosquito oviposition site selection in Mediterranean temporary habitats

2019 ◽  
Vol 45 (3) ◽  
pp. 498-513 ◽  
Author(s):  
Claire Duchet ◽  
Shomen Mukherjee ◽  
Meital Stein ◽  
Matthew Spencer ◽  
Leon Blaustein
Keyword(s):  
Site Selection ◽  
Oviposition Site ◽  
Oviposition Site Selection ◽  
Temporary Habitats ◽  
Mosquito Oviposition

Predator-Induced Shifts in Mosquito Oviposition Site Selection: A Meta-Analysis and Implications for Vector Control

2010 ◽  
Vol 56 (3-4) ◽  
pp. 263-279 ◽  
Author(s):  
James R. Vonesh ◽  
Leon Blaustein
Keyword(s):  
Site Selection ◽  
Predator Avoidance ◽  
Meta Analysis ◽  
Life Cycles ◽  
Oviposition Site ◽  
Oviposition Site Selection ◽  
Vector Population ◽  
General Importance ◽  
Mosquito Oviposition ◽  
Aquatic Predators

The global resurgence and emergence of new mosquito-borne diseases and increasing resistance of mosquitoes to chemical pesticides have prompted renewed interest in biocontrol methods that use aquatic predators of mosquito larvae. For disease vectors with complex life cycles, like mosquitoes, in which adults are terrestrial and choose aquatic habitats in which to deposit their offspring, shifts in oviposition site selection may have important consequences for vector population dynamics and epidemiology. While there have been numerous studies of mosquito oviposition site selection, methodology and results vary, making it difficult to evaluate the general importance of predator-induced shifts in oviposition site selection for biocontrol scenarios. Here we use meta-analysis to provide a quantitative framework for examining variation in mosquito oviposition responses to predators. Overall, we find a broad pattern of predator avoidance among mosquito and predator taxa. The primary factor explaining variation in oviposition response appears to be taxonomic and/or life-history related—avoidance is weakest or non-existent inAedesspecies that oviposit eggs above water in container habitats. Responses also varied among predators. Generally, oviposition avoidance was strongest in response to fish and insects, weak or nonexistent in response to notostracans, urodeles, or dipterans, and there is limited evidence that some mosquitoes are attracted to cyclopoid crustaceans. Our results highlight that predator avoidance during oviposition is common, but not ubiquitous, in mosquitoes and needs to be considered when evaluating the likely efficacy of aquatic predators for biocontrol.

scholarly journals Naturally Occurring Microbiota Associated with Mosquito Breeding Habitats and Their Effects on Mosquito Larvae

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
H. A. K. Ranasinghe ◽  
L. D. Amarasinghe
Keyword(s):  
Abiotic Factors ◽  
Mosquito Species ◽  
Breeding Habitat ◽  
Larval Abundance ◽  
Mosquito Larvae ◽  
Natural Habitats ◽  
Individual Fitness ◽  
Naturally Occurring ◽  
Breeding Habitats ◽  
Mosquito Breeding

Immature mosquitoes are aquatic, and their distribution, abundance, and individual fitness in a particular breeding habitat are known to be dependent on mainly three factors: biotic factors, abiotic factors, and their interaction between each other and with other associated taxa. Mosquito breeding habitats harbor a diversified naturally occurring microbiota assemblage, and the biota have different types of interactions with mosquito larvae in those habitats. Those interactions may include parasitism, pathogenism, predation, and competition which cause the mortality of larvae, natural reduction of larval abundance, or alterations in their growth. Many microbiota species serve as food items for mosquito larvae, and there are also some indigestible or toxic phytoplanktons to larvae. However, when there is coexistence or mutualism of different mosquito species along with associated microbiota, they form a community sharing the habitat requirements. With the available literature, it is evident that the abundance of mosquito larvae is related to the densities of associated microbiota and their composition in that particular breeding habitat. Potential antagonist microbiota which are naturally occurring in mosquito breeding habitats could be used in integrated vector control approaches, and this method rises as an ecofriendly approach in controlling larvae in natural habitats themselves. To date, this aspect has received less attention; only a limited number of species of microbiota inhabiting mosquito breeding habitats have been recorded, and detailed studies on microbiota assemblage in relation to diverse vector mosquito breeding habitats and their association with mosquito larvae are few. Therefore, future studies on this important ecological aspect are encouraged. Such studies may help to identify field characteristic agents that can serve as mosquito controlling candidates in their natural habitats themselves.

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