Ann Infect Dis Epidemiol | Volume 5, Issue 1 | Research Article | Open Access

Species Diversity and Seasonal Abundance in Relation to Environmental Factors in Different Agro Climatic Zones of Tamil Nadu, India

Periyasamy Senthamarai Selvan1,2*, Arulsamy Jebanesan2 and Govindaraj Divya3

1Department of Zoology, Division of Vector Biology and Control, Annamalai University, India
2Veterinary and Fisheries Arthropod Laboratory, National Bureau of Agricultural Insect Resources (ICAR), India
3Division of Chemistry and Bioprospecting, Institute of Forest Genetics and Tree Breeding (ICFRE), India

*Correspondance to: Periyasamy Senthamarai Selvan 

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Abstract

Background: Dengue emergence was high in several regions of Tamil Nadu, India recently, which can lead to severe health problems in human population. Prevention of this arbovirus requires a clear understanding of transmission cycles and breeding capability, especially of their vectors. Results: A total of 11,202 specimens (6,337 larvae and 4,865 adults) which belongs to 64 taxonomic categories distributed in 14 genera were collected. Among the collected mosquitoes, morphological identification showed the presence of 64 species: Aedes (11), Anopheles (11), Armigeres (3), Christophersiomyia (2), Culex (13), Downsiomyia (2), Ochlerotatus (7), Heizmannia (1), Orthopodomyia (1), Fredwardsius (1), Lutzia (2), Tripteroides (2), Uranotaenia (6), Toxorhynchites (2). Significant relationships were observed between abundance and seasonality, with a notable increase in the mosquito’s abundance in rainy periods. Diversity indices were revealed with interaction between seasonality and months. High Altitude Zone (HAZ) (3,726) had highest species richness followed by Cauvery Delta Zone (CDZ) (1,774). Larvae of Ae. aegypti in containers and Cx. tritaeniorhynchus in paddy were omnipresent. Conclusion: This work highlights the importance of detailed analysis of different mosquito larvae and pupae occurring at different localities and in different habitat types for detailed insight into the agro ecosystem wide fauna. Information on the different species occurring at inventoried aquatic habitats provides interesting ecological insights into species co-occurrence and habitat preferences.

Keywords:

Mosquitoes diversity; Aedes aegypti; Agro climatic zones; Shannon and bergerparker index; Tamil Nadu

Citation:

Selvan PS, Jebanesan A, Divya G. Species Diversity and Seasonal Abundance in Relation to Environmental Factors in Different Agro Climatic Zones of Tamil Nadu, India. Ann Infect Dis Epidemiol. 2020; 5(1): 1050.

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