Residual longevity of recaptured sterile mosquitoes as a tool to understand field performance and reveal quality

Balatsos Georgios, Blanco-Sierra laura, Karras Vasileios, Puggioli Arianna, Costa Osório Hugo, Bellini Romeo, Papachristos Dimitrios P., Bouyer Jérémy, Bartumeus Frederic, Papadopoulos Nikos T., Michaelakis Antonios. 2024. Residual longevity of recaptured sterile mosquitoes as a tool to understand field performance and reveal quality. Insects, 15 (11):826, 12 p.

Résumé : Invasive mosquito species, such as Aedes albopictus, pose significant threats to both ecosystems and public health due to their role in transmitting diseases, such as dengue, Zika, and chikungunya. The Sterile Insect Technique (SIT) is a promising vector control strategy aimed at reducing mosquito populations by releasing sterile males to mate with wild females and reduce their reproduction rates. In this study, we employed the captive cohort method, which assesses the remaining longevity of randomly caught released individuals, to assess the longevity and frailty dynamics of sterile and non-sterile Ae. albopictus males. Using a mark–release–recapture approach (MRR), we compared the residual lifespan of sterile and non-sterile released males with that of wild, non-sterile males, aiming to understand the frailty dynamics of released males and, therefore, their quality and field performance. Contrary to expectations, our results revealed that released sterile males showed increased longevity compared to non-sterile males. Further, the marking process did not impact the longevity between lab-kept and marked males, suggesting that the marking process does not adversely affect survival under controlled conditions. These findings underscore the importance of optimizing pre-release and mass-rearing practices to enhance the effectiveness of SIT programs. Our study also demonstrates for the first time the use of the captive cohort method for understanding the biological dynamics of sterile mosquito populations in SIT programs, providing valuable insights for improving vector control strategies.

Mots-clés Agrovoc : lâcher d'insectes stériles, Aedes albopictus, vecteur de maladie, lutte biologique, dynamique des populations, contrôle de maladies, longévité, élevage en masse, lutte anti-insecte, méthode de lutte

Mots-clés géographiques Agrovoc : Italie, Grèce

Mots-clés libres : Sterile Insect Technique, Vector control, Quality control

Classification Agris : L72 - Organismes nuisibles des animaux

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement européennes : European Commission

Agences de financement hors UE : International Atomic Energy Agency

Programme de financement européen : H2020

Projets sur financement : (GRC) Innovative approaches for monitoring and management of the Asian tiger mosquito with emphasis on the Sterile Insect Technique, (GRC) A systematic surveillance of vector mosquitoes for the control of mosquito-borne diseases in the Region of Attica, (EU) Research Infrastructures for the control of vector-borne diseases

Auteurs et affiliations

• Balatsos Georgios, Benaki Phytopathological Institute (GRC)
• Blanco-Sierra laura, Centre d’Estudis Avançats de Blanes (ESP)
• Karras Vasileios, Benaki Phytopathological Institute (GRC)
• Puggioli Arianna, CAA (ITA)
• Costa Osório Hugo, University of Lisbon (PRT)
• Bellini Romeo, CAA (ITA)
• Papachristos Dimitrios P., Benaki Phytopathological Institute (GRC)
• Bouyer Jérémy, CIRAD-BIOS-UMR ASTRE (REU) ORCID: 0000-0002-1913-416X
• Bartumeus Frederic, Centre d’Estudis Avançats de Blanes (ESP)
• Papadopoulos Nikos T., University of Thessaly (GRC) - auteur correspondant
• Michaelakis Antonios, Benaki Phytopathological Institute (GRC) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/610791/)

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