Journal of Threatened Taxa | www.threatenedtaxa.org | 26 February 2017 | 9(2): 9851–9857
Priyamvada Pandey 1 & Animesh Kumar Mohapatra 2
1,2 Department of Life Science Education, Regional Institute of Education (NCERT), Bhubaneswar, Odisha 751004, India
1 firstname.lastname@example.org, 2 email@example.com (corresponding author)
Editor: Robin Wen Jiang Ngiam, National Parks Board, Singapore. Date of publication: 26 February 2017 (online & print)
Manuscript details: Ms # 2547 | Received 25 September 2016 | Final received 26 November 2016 | Finally accepted 22 December 2016
Citation: Pandey, P. & A.K. Mohapatra (2017). Diversity of two families Libellulidae and Coenagrionidae (Odonata) in Regional Institute of Education Campus, Bhubaneswar, Odisha, India. Journal of Threatened Taxa 9(2): 9851–9857; 9851-9857
Copyright: © Pandey & Mohapatra 2017. Creative Commons Attribution 4.0 International License. JoTT allows unrestricted use of this article in any medium, reproduction and distribution by providing adequate credit to the authors and the source of publication.
Funding: Department of Life Science Education, Regional Institute of Education (NCERT), Bhubaneswar, Odisha.
Competing interests: The authors declare no competing interests.
Acknowledgements: The authors are grateful to Dr. Lala A. K. Singh, Former Research Officer, Odisha and Dr. Siba Prasad Parida, Scientist, RMNH, Bhubaneswar, Odisha for their valuable guidance.
Abstract: Libellulidae and Coenagrionidae are the most dominant families among dragonflies and damselflies. The present study deals with the diversity, occurrence and present status of libellulids and coenagrionids within the Regional Institute of Education Campus in Bhubaneswar, Odisha, India (RIEC). The major objectives of this study are to prepare a preliminary checklist of libellulids and coenagrionids species in the RIEC and to find out the status and distribution of genera and species in their respective families. This study is also aimed at systematic planning for developing different strategies for conservation of odonates in the campus. During this study a total of 24 species have been recorded out of which 20 species belong to the family Libellulidae representing 15 genera and four species belong to the family Coenagrionidae representing four genera. The findings of this study are based on the survey which was carried out for a period of four months in 2015.
Keywords: Anisoptera, Bhubaneswar, Coenagrionidae, Libellulidae, Odonata, Regional Institute of Education Campus, Zygoptera.
Odonates represent one of the primitive orders of insects having their evolutionary origin about 220 million years ago in the carboniferous period (Mitra 2006). There are approximately 6000 species belonging to 630 genera and 28 families which have been reported worldwide out of which only one species are included under Schedule I of the Wildlife Protection Act, 1972 (Tsuda 1991; Silsby 2001; Rathod et al. 2012). Dragonflies belong to the suborder Anisoptera and are characterized by their unequally-sized wings and a stouter abdomen. Damselflies are included under the sub-order Zygoptera having a more slender body with both wings approximately of similar size and shape (McGavin et al. 2002). Libellulidae and Coenagrionidae are the largest, successful and the most heterogenous family among dragonflies and damselflies including about 1,000 species all over the world (Richards et al. 1977). Odonates remain closely associated to standing water bodies like reservoirs, lakes, ponds, even seasonal rain water puddles are preferred by several species while some prefer running water like rivers, rivulets, hill streams, etc. (Bora & Meitei 2014). Several reports convey that the distributions of Odonates are dependent on the nature of water habitat and temperature, i.e., they choose specific environments for their survival (Rehn 2003; Vincent et al. 2008). In India, 470 species of odonates are recorded representing 139 genera and 19 families out of which 95 species belong to the family Libellulidae and 65 species belong to the family Coenagrionidae (Prasad & Varshney 1995; Subramanian 2009). In the peninsular region, 50 species of libellulids and 25 species of coenagrionids were recorded (Gunathilagaraj et al. 1999; Kandibane et al. 2005; Arulprakash & Gunathilagaraj et al. 2010). Nair (2011) described 45 species of libellulids and 25 species of coenagrionids in Odisha and eastern India.
The Regional Institute of Education (RIE), Bhubaneswar is located in the middle of the city at 20017’20”N & 85049′57″E, altitude, 45m, covering an area of approximately 40.7ha, having a perimeter of 2.65km. The study area has dense vegetation and provides a favourable habitat for a varied diversity of libellulids and coenagrionids. It experiences tropical weather conditions with an average temperature ranging between 200C and 360C. The summer season extends from March to May having maximum temperatures often exceeding 400C, followed by monsoon season from June to October with a temperature range of 25–32 0C. Winter lasts for about 10 weeks from November to February with a temperature range of 15–18 0C. May is the hottest month with daily temperatures ranging from 32–42 0C. December is the coldest month, with temperatures varying from 15–28 0C. The area receives an average annual rainfall of 1,492mm (58.73 in).
Materials and Methods
The present study was done over a period of four months from Au gust to November 2015. Surveys were carried out throughout the morning, noon and evening hours to record maximum species of libellulids and coenagrionids. Maximum numbers of species were recorded during afternoon hours from early August to late September. Observations were made with the aid of a binocular and photographs were taken in their natural habitat with the help of digital cameras (Nikon L100 and Olympus E-420).
Identification: The species were identified, and classified with the help of identification keys provided by Fraser (1933, 1934, 1936), Subramanian (2005), Mitra (2006), Bedjaniè et al. (2007), Andrew et al. (2009) and Nair (2011). The total number of genera and species were listed and identified species were classified into three categories according to their occurrence and monthly visibility within the study area: C - common (10–30 sightings), O - occasional (5–10 sightings), R - rare (2–5 sightings).
In the present findings, 20 (83.33%) species of dragonflies representing 15 (78.95%) genera belonging to the family Libellulidae and four (16.67%) species of damselflies representing four genera (21.05%) belonging to the family Coenagrionidae have been reported (Tables 1 and 2). The photographs of the recorded species are presented as Images 1–31. Most of the recorded libellulids were found near the fish pond area in the campus. Coenagrionids have been reported in the grasses and swampy areas. Members of the Libellulidae family are small to medium-sized, brightly coloured, often having wing patches and they breed mainly in still water. One of the unique features of libellulids is that they frequently return to and defend the same perch or marsh edge. Coenagrionids are identified from their transparent wings which are rounded at tips and they have a long thin abdomen. They are non-metallic and found in almost all colours from blue to orange.
Subramanian (2009) in his study described a total of 11 dragonfly families at the global level, out of which the maximum belong to two major families: Libellulidae (972 species) and Gomphidae (958 species), followed by Aeshnidae (436 species), Corduliidae (249 species) and Macromiidae (123 species). Sharma & Shukla (2015) recorded 25 species of Odonata. It includes 15 species of dragonflies belonging to three families and 10 species of damselflies under four families. Similar Libellulidae family dominance has also been reported by Manwar et al. (2012) and Tijare & Patil (2012) while studying dragonflies and damselflies in Maharashtra and Nagpur, respectively. The present study showed that the Libellulidae family is the most diverse and dominant family of dragonflies in the study area. Among all 20 species of libellulids recorded, nine (45%) are common, six (30%) are occasional and five (25%) are rare (Table 3; Fig 2). Out of four species of coenagrionids observed, three (75%) are common and one (25%) are occasional (Table 3; Fig 3). It was also noted that the maximum number of species were recorded in the month of August and September, except nine species of libellulids and three species of coenagrionids which were present in all four months. Single species were recorded from the genera Acisoma, Aethriamanta, Brachydiplax, Brachythemis, Bradinopyga, Crocothemis, Diplacodes, Palpopleura, Pantala, Rhodothemis, Rhyothemis, Tramea and Trithemis constituting 13 species. There were two species which were recorded under the genus Neurothemis (intermedia and tullia) and five species reported belong to genus Orthetrum (pruinosum, glaucum, Sabina, triangulare and villosovittatum) (Table 1; Images 1–31). To obtain a more comprehensive understanding of Odonata diversity in the campus and any temporal changes in the area under the study should be continuously surveyed for at least two to three years.
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