Assessing Seasonal Occurrence of Odonates in the Joysagar Area, Sivasagar District, Assam, India
Padmaza Chutia *
Department of Zoology, Sibsagar University, Sivasagar, Assam, India.
Chinmoyee Sonowal
Department of Zoology, Sibsagar University, Sivasagar, Assam, India.
*Author to whom correspondence should be addressed.
Abstract
The present paper deals with the study of seasonal occurrences of Odonate species in the Joysagar area, Sivasagar district, Assam, India. The study was conducted from June, 2023 to May, 2025. Three sites were selected from the study area. A total of 26 species of Odonates i.e., 14 species of dragonflies (Suborder-Anisoptera) and 12 species of damselflies (Suborder- Zygoptera) belonging to the Families Libellulidae, Coenagrionidae and Platycnemididae were recorded from the three study sites during the study period i.e., from June, 2023 to May, 2024 and June, 2024 to May, 2025, where the highest number of Odonate species and individuals were recorded from monsoon. Orthetrum sabina (Drury) and Ceriagrion cerinorubellum (Brauer) were found to be the most abundant species in the study area during both the two years of study period. The current study also reveals that the Sørensen Similarity Coefficient ranges between the values 0.70-1.00 for Site 1, Site 2 and Site 3 between the study periods June, 2023 to May, 2024 and June, 2024 to May, 2025. Statistical analysis indicated a moderate positive correlation between average seasonal temperature and Odonate abundance in all of the three study sites. The current paper highlights that the population of Odonates are shaped by monsoonal patterns, underscoring their role as indicators of aquatic and terrestrial ecosystem integrity and a wide environmental stability.
Keywords: Odonates, monsoon, abundant, Sørensen Similarity Coefficient, India