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Current distribution of the invasive mosquito species, Aedes koreicus [Hulecoeteomyia koreica] in northern Italy.

Montarsi F, Drago A, Martini S, Calzolari M, De Filippo F, Bianchi A, Mazzucato M, Ciocchetta S, Arnoldi D, Baldacchino F, Rizzoli A, Capelli G - Parasit Vectors (2015)

Bottom Line: Aedes koreicus was found in 73 municipalities out of 155 monitored (47.1 %), including 23 municipalities (14.8 %) previously not infested.However the mosquito has also been found to the west (Province of Trento) and to the south and south-west (Provinces of Vicenza and Treviso) of the initially infested area.These data can be useful to validate predictive models of potential distribution and dispersal of this species in Italy or in Europe.

View Article: PubMed Central - PubMed

Affiliation: Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy. fmontarsi@izsvenezie.it.

ABSTRACT

Background: The invasive species Aedes (Finlaya) koreicus was first identified in north-eastern Italy in 2011, during the ongoing surveillance activity of Aedes albopictus. Following this finding, a more intensive monitoring was carried out to assess the distribution of the species and to collect biological data. Herein, we report the new records obtained by four years of surveillance.

Findings: The presence of Ae. koreicus was checked using ovitraps, adults traps and by larval collections in all possible breeding sites from May 2011 to July 2015. The monitoring started in the site of the first detection (Province of Belluno) and was then extended in the neighbouring Provinces belonging to four Regions. Aedes koreicus was found in 73 municipalities out of 155 monitored (47.1 %), including 23 municipalities (14.8 %) previously not infested. The area of first detection of Ae. koreicus (Province of Belluno) was also the most infested (68 %). However the mosquito has also been found to the west (Province of Trento) and to the south and south-west (Provinces of Vicenza and Treviso) of the initially infested area.

Conclusions: The spread of Ae. koreicus is directed towards south and west from the original infested area, likely due to the dense road connections and the habitat suitability of the new areas. According to these records, northern Italy has a high probability to be invaded by Ae. koreicus in the next decade. These data can be useful to validate predictive models of potential distribution and dispersal of this species in Italy or in Europe.

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Map of municipalities positive for the presence of Aedes koreicus, Aedes albopictus and their overlapping areas in northern Italy, 2011–2015. The names of municipalities are available in the Additional file 1
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Fig2: Map of municipalities positive for the presence of Aedes koreicus, Aedes albopictus and their overlapping areas in northern Italy, 2011–2015. The names of municipalities are available in the Additional file 1

Mentions: The results of our monitoring shows a large area of Ae. koreicus and Ae. albopictus co-habitation (Fig. 2; Additional file 1). Interspecific competition between Ae. koreicus and Ae. albopictus might occur in many areas with mild climate conditions as reported in other countries among invasive and native container-breeding mosquitoes [17]. Preliminary results of larval competition experiments in laboratory suggested that the development of Ae. koreicus might be negatively affected by the presence of Ae. albopictus (Frédéric Baldacchino, personal communication). In nature in our study, Ae. albopictus let a spatio-temporal gap to Ae. koreicus, avoiding larval competition as observed for Ae. japonicus [18]. Indeed, Ae. koreicus larvae are found early in the spring (approximately one month before Ae. albopictus larvae) and in areas too cold for Ae. albopictus where Ae. koreicus can occupy an empty niche.Fig. 2


Current distribution of the invasive mosquito species, Aedes koreicus [Hulecoeteomyia koreica] in northern Italy.

Montarsi F, Drago A, Martini S, Calzolari M, De Filippo F, Bianchi A, Mazzucato M, Ciocchetta S, Arnoldi D, Baldacchino F, Rizzoli A, Capelli G - Parasit Vectors (2015)

Map of municipalities positive for the presence of Aedes koreicus, Aedes albopictus and their overlapping areas in northern Italy, 2011–2015. The names of municipalities are available in the Additional file 1
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4666031&req=5

Fig2: Map of municipalities positive for the presence of Aedes koreicus, Aedes albopictus and their overlapping areas in northern Italy, 2011–2015. The names of municipalities are available in the Additional file 1
Mentions: The results of our monitoring shows a large area of Ae. koreicus and Ae. albopictus co-habitation (Fig. 2; Additional file 1). Interspecific competition between Ae. koreicus and Ae. albopictus might occur in many areas with mild climate conditions as reported in other countries among invasive and native container-breeding mosquitoes [17]. Preliminary results of larval competition experiments in laboratory suggested that the development of Ae. koreicus might be negatively affected by the presence of Ae. albopictus (Frédéric Baldacchino, personal communication). In nature in our study, Ae. albopictus let a spatio-temporal gap to Ae. koreicus, avoiding larval competition as observed for Ae. japonicus [18]. Indeed, Ae. koreicus larvae are found early in the spring (approximately one month before Ae. albopictus larvae) and in areas too cold for Ae. albopictus where Ae. koreicus can occupy an empty niche.Fig. 2

Bottom Line: Aedes koreicus was found in 73 municipalities out of 155 monitored (47.1 %), including 23 municipalities (14.8 %) previously not infested.However the mosquito has also been found to the west (Province of Trento) and to the south and south-west (Provinces of Vicenza and Treviso) of the initially infested area.These data can be useful to validate predictive models of potential distribution and dispersal of this species in Italy or in Europe.

View Article: PubMed Central - PubMed

Affiliation: Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy. fmontarsi@izsvenezie.it.

ABSTRACT

Background: The invasive species Aedes (Finlaya) koreicus was first identified in north-eastern Italy in 2011, during the ongoing surveillance activity of Aedes albopictus. Following this finding, a more intensive monitoring was carried out to assess the distribution of the species and to collect biological data. Herein, we report the new records obtained by four years of surveillance.

Findings: The presence of Ae. koreicus was checked using ovitraps, adults traps and by larval collections in all possible breeding sites from May 2011 to July 2015. The monitoring started in the site of the first detection (Province of Belluno) and was then extended in the neighbouring Provinces belonging to four Regions. Aedes koreicus was found in 73 municipalities out of 155 monitored (47.1 %), including 23 municipalities (14.8 %) previously not infested. The area of first detection of Ae. koreicus (Province of Belluno) was also the most infested (68 %). However the mosquito has also been found to the west (Province of Trento) and to the south and south-west (Provinces of Vicenza and Treviso) of the initially infested area.

Conclusions: The spread of Ae. koreicus is directed towards south and west from the original infested area, likely due to the dense road connections and the habitat suitability of the new areas. According to these records, northern Italy has a high probability to be invaded by Ae. koreicus in the next decade. These data can be useful to validate predictive models of potential distribution and dispersal of this species in Italy or in Europe.

Show MeSH
Related in: MedlinePlus