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Checklist and Seasonal Distribution of Odonata (insecta) of Khulna University Campus, Bangladesh

Md. Sajjad Hossain Tuhin
Forestry and Wood Technology Discipline Khulna University, Khulna, Bangladesh

Abstract/ Executive Summary:

An extensive survey of odonates were conducted in Khulna University Campus from August 2014 to August 2018. In total 40 species belonging to 24 genera and 4 families of odonates were recorded. Anisoptera contributed with 25 species belonged to 17 genera and two families and Zygoptera contributed with 15 species of 7 genera and two families. Libellulidae found most dominant family of odonates by contributing 24 species over Coenagrionidae, Platycnemididae, and Gomphidae. Species richness increased in monsoon and 95% of the total species count were recorded in June-October. In winter, species richness declined at lowest number.

Keywords: Dragonflies, Damselflies, Diversity, Seasonal distribution, Khulna University, Bangladesh

Location: Khulna University Campus

Start Date: 00-08-2014

End Date: 00-08-2018

Program Area: Pest Management

Commodity: Dragonflies

Objectives:

This study is conducted to identify the species and their occurrence pattern in a public university campus.

Methodology:

Study Site The study site (Khulna University Campus) lies between 22º47"57' N to 22º48"18' N and 89º31"38' E to 89º32"21' E with an area of 106.75 acres. Climatic condition of this area is typically tropical with a mild winter from October to March, hot and humid summer in March to June and humid, warm rainy monsoon in June to October. Average annual precipitation was around 368 mm and reaches highest in July and August with 393mm rainfall. Maximum and minimum temperature is variable all the year round ca. 12-15ºC (minimum) and reaches up to 41-45ºC (maximum). Sampling design The study was carried out throughout a reputed public university campus of Bangladesh (Khulna University Camus) from August 2014 to August 2018. Weekly opportunistic visits were carried out to address the identification of odonata of the study site. The area were surveyed by walking through all possible habitats present at the study site from 8:00 am17:00 hr.. For minimizing the destruction of odonata population the specimens were photographed by Nikon3200D camera with Nikkor 18-55mm AF-S DX, Nikkor 55- 300mm AF-S DX and Micro-Nikkor 105 mm FX AF lenses. Only confusing specimens were collected by insect catching net from the site for proper identification. Identification were done with the help of taxonomic keys provided by Fraser (1933, 1934, 1936), Asahina (1967), Lahiri (1987), Mitra (2002), Subramanian (2005), and Nair (2011).

Source of Information: Journal of Entomology and Zoology Studies 2019; 7(1): 160-164 E-ISSN: 2320-7078 P-ISSN: 2349-6800

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Odonata is a vital indicator to study aquatic habitat condition. Hence, odonata study in under inventory phase in Bangladesh. We have very little knowledge about their distribution and ecology. Current study is a small contribution of documentation and distribution pattern of odonata of this country.

Knowledge Management: Journal