Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquito
Abstract Background Aedes albopictus (Skuse, 1894) is a vector for pathogens like dengue, chikungunya, and Zika viruses. Its adaptive capacity enables reproduction in temperate climates and development mainly in artificial containers with fresh water in urbanized areas. Nevertheless, breeding in coa...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2024-01-01
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| Series: | Parasites & Vectors |
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| Online Access: | https://doi.org/10.1186/s13071-023-06069-5 |
| _version_ | 1797350048463323136 |
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| author | Laura Blanco-Sierra Eleni C. Savvidou Evangelia D. Mpakovasili Charalampos S. Ioannou Frederic Bartumeus Nikos T. Papadopoulos |
| author_facet | Laura Blanco-Sierra Eleni C. Savvidou Evangelia D. Mpakovasili Charalampos S. Ioannou Frederic Bartumeus Nikos T. Papadopoulos |
| author_sort | Laura Blanco-Sierra |
| collection | DOAJ |
| description | Abstract Background Aedes albopictus (Skuse, 1894) is a vector for pathogens like dengue, chikungunya, and Zika viruses. Its adaptive capacity enables reproduction in temperate climates and development mainly in artificial containers with fresh water in urbanized areas. Nevertheless, breeding in coastal areas may also occur along with its aggressive invasiveness. Global warming and the consequent rise in sea levels will increase saline (> 30 ppt) or brackish (0.5–30 ppt salt) water in coastal regions. To address whether Ae. albopictus can breed in brackish water, we initiated the current study that analyses the survival of immature stages at different salinity concentrations and explores whether carryover effects occur in the resulting adults. This possible adaptation is important when considering the potential for development in new habitats and expansion of one of the world’s most invasive species. Methods We investigated the influence of salinity on the survival of Ae. albopictus larvae and adults under laboratory-controlled conditions. First instar larvae were exposed to different salinity concentrations (0 to 30 ppt) and their development time, pupation, adult emergence, and overall survival were monitored daily. We used Kaplan-Meier and Cox regression models to analyze the survival rates at different salinity levels. Furthermore, life tables were constructed under each salinity concentration. Results Increasing salt concentrations significantly increased the mortality risk during immature development, while no significant effect was observed on adult mortality risk. A comparison between distilled and bottled water revealed a notable increase in overall mortality risk for individuals developing in distilled water. However, no significant effects were found when analyzing survival from the first larval stage to adult emergence and adult lifespan. The life expectancy of immature stages decreased with increasing salt concentrations, although salinity concentration did not significantly impact adult life expectancy. Conclusions Our findings suggest that Ae. albopictus, previously considered freshwater species, can successfully develop and survive in brackish waters, even in the absence of characteristic structures found in euryhaline species. These adaptations may enable Ae. albopictus to establish new breeding sites and colonize unexplored territories. Knowledge of these physiological adaptations of Ae. albopictus to salinity should be pursued to increase the range of control of the species, and to make more accurate predictions of its dispersal and vectoring ability. Graphical Abstract |
| first_indexed | 2024-03-08T12:40:11Z |
| format | Article |
| id | doaj.art-330e8c48a6d34b7ea596a2dbe4888cab |
| institution | Directory Open Access Journal |
| issn | 1756-3305 |
| language | English |
| last_indexed | 2024-03-08T12:40:11Z |
| publishDate | 2024-01-01 |
| publisher | BMC |
| record_format | Article |
| series | Parasites & Vectors |
| spelling | doaj.art-330e8c48a6d34b7ea596a2dbe4888cab2024-01-21T12:12:30ZengBMCParasites & Vectors1756-33052024-01-0117111010.1186/s13071-023-06069-5Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquitoLaura Blanco-Sierra0Eleni C. Savvidou1Evangelia D. Mpakovasili2Charalampos S. Ioannou3Frederic Bartumeus4Nikos T. Papadopoulos5Centre d’Estudis Avançats de Blanes (CEAB-CSIC)Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of ThessalyLaboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of ThessalyLaboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of ThessalyCentre d’Estudis Avançats de Blanes (CEAB-CSIC)Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of ThessalyAbstract Background Aedes albopictus (Skuse, 1894) is a vector for pathogens like dengue, chikungunya, and Zika viruses. Its adaptive capacity enables reproduction in temperate climates and development mainly in artificial containers with fresh water in urbanized areas. Nevertheless, breeding in coastal areas may also occur along with its aggressive invasiveness. Global warming and the consequent rise in sea levels will increase saline (> 30 ppt) or brackish (0.5–30 ppt salt) water in coastal regions. To address whether Ae. albopictus can breed in brackish water, we initiated the current study that analyses the survival of immature stages at different salinity concentrations and explores whether carryover effects occur in the resulting adults. This possible adaptation is important when considering the potential for development in new habitats and expansion of one of the world’s most invasive species. Methods We investigated the influence of salinity on the survival of Ae. albopictus larvae and adults under laboratory-controlled conditions. First instar larvae were exposed to different salinity concentrations (0 to 30 ppt) and their development time, pupation, adult emergence, and overall survival were monitored daily. We used Kaplan-Meier and Cox regression models to analyze the survival rates at different salinity levels. Furthermore, life tables were constructed under each salinity concentration. Results Increasing salt concentrations significantly increased the mortality risk during immature development, while no significant effect was observed on adult mortality risk. A comparison between distilled and bottled water revealed a notable increase in overall mortality risk for individuals developing in distilled water. However, no significant effects were found when analyzing survival from the first larval stage to adult emergence and adult lifespan. The life expectancy of immature stages decreased with increasing salt concentrations, although salinity concentration did not significantly impact adult life expectancy. Conclusions Our findings suggest that Ae. albopictus, previously considered freshwater species, can successfully develop and survive in brackish waters, even in the absence of characteristic structures found in euryhaline species. These adaptations may enable Ae. albopictus to establish new breeding sites and colonize unexplored territories. Knowledge of these physiological adaptations of Ae. albopictus to salinity should be pursued to increase the range of control of the species, and to make more accurate predictions of its dispersal and vectoring ability. Graphical Abstracthttps://doi.org/10.1186/s13071-023-06069-5AedesDispersalMosquitoSalinitySurvival |
| spellingShingle | Laura Blanco-Sierra Eleni C. Savvidou Evangelia D. Mpakovasili Charalampos S. Ioannou Frederic Bartumeus Nikos T. Papadopoulos Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquito Parasites & Vectors Aedes Dispersal Mosquito Salinity Survival |
| title | Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquito |
| title_full | Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquito |
| title_fullStr | Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquito |
| title_full_unstemmed | Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquito |
| title_short | Effect of water salinity on immature performance and lifespan of adult Asian tiger mosquito |
| title_sort | effect of water salinity on immature performance and lifespan of adult asian tiger mosquito |
| topic | Aedes Dispersal Mosquito Salinity Survival |
| url | https://doi.org/10.1186/s13071-023-06069-5 |
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