~ 440 ~ Journal of Entomology and Zoology Studies 2020; 8(1): 440-444 E-ISSN: 2320-7078 P-ISSN: 2349-6800 JEZS 2020; 8(1): 440-444 © 2020 JEZS Received: 11-11-2019 Accepted: 15-12-2019 SR Taigor (a) Ex-Employee of PEACE Institute Charitable Trust, Delhi, India (b) State Mission for Clean Ganga-Uttar Pradesh, Urban Development Department, Govt. of Uttar Pradesh, India Corresponding Author: SR Taigor (a) Ex-Employee of PEACE Institute Charitable Trust, Delhi, India (b) State Mission for Clean Ganga-Uttar Pradesh, Urban Development Department, Govt. of Uttar Pradesh, India Observation of fresh water Ganges dolphin ( Platanista gangetica ) in the Hamirpur and Ekdala stretches of Yamuna river, India SR Taigor Abstract The survey was carried out in 2 stretches of Yamuna River, India in total 10 Km length in toward down streams where 2 Adult, 1 juvenile in Hamirpur and 6 adult and 3 juvenile sizes in Ekdala River stretches. Dolphins were reported in surveyed stretches after in long periods. Various threats in stretch; sand mining, fishing, ferries, cremations, water lifting for irrigation, agricultural cultivation on the river banks etc. were also recorded during the survey. The present paper deals resulted survey of two stretch of Yamuna River in presence of Ganges River dolphins and various threats. Keywords: Grids, Yamuna, Dolphins, Nadi mitra mandali, habitats, Ganga Introduction The Ganges River Dolphin locally known as Susu is restricted to the Ganga, Brahamputra, Karnaphuli-Sangu and Meghna river systems and their tributaries, from the foot hills of the Himalayas to the limits of tidal zone in India, Bangladesh, Nepal and Bhutan (Anderson, 1878; Jones, 1982; Reeves and Brownell, 1989; Reeves et al., 1993; Sinha, 1997 a, b; Sinha, 2000 Taigor and Rao, 2012, 2014,) [1, 12, 24, 25, 32, 34, 38, 42] . Investigations on the ecology and distribution of dolphin have been steadily advancing since early 1970’s (Pilleri, 1970; Kasuya, 1972; Kasuya and Haque, 1972; Haque, 1976) [19, 13, 11] . In the recent years focus has been given on studies related to the status of dolphin in various rivers and their tributaries (Jones, 1982; Pilleri and Tagliavini, 1982; Gupta, 1986; Shrestha, 1986; Singh and Sharma, 1985; Rao et al., 1988; Choudhury and Hussain, 1992) [12, 10, 27, 9] . In spite of being a “Flagship” species, representing an ecosystem in need of conservation its status has become a matter of grave concern over the past few decades (Behera, 2002) [6] . Once believed to be in tens of thousands, their numbers have gradually reduced to 4000-5000 (Jones, 1982; Anon, 2006; Choudhary et al., 2006; Behera et al., 2008, Meena et al., 2017) [12, 7] with further decline to a mere 1800 individuals in all the tributaries of its distribution (Behera et al., 2008, Bashir et al., 2010, Sinha, et al. 2010, Anon, 2010, Anon, 2012, Sulekha et al. 2014, Singh et al. 2014,) [7, 4, 3, 5] . The Yamuna is the largest tributary of the river Ganges (Ganga) in northern India. Originating from the Yamunotri Glacier at a height 6,387 metres, on the south western slopes of Banderpooch peaks, in the Lower Himalayas in Uttarakhand, it travels a total length of 1,376 kilometers (855 miles) and has a drainage area of 366,223 sq km (40.2% of the entire Ganges Basin), before merging with the Ganga at Triveni Sangam, Allahabad (Anon, 2006, Sharma, 2006, Rao et al. 2013, 2016) [26, 6] . Encounters of anthropogenic threats of grids also highlighted. There is no complete scientific estimate of dolphin note done in Yamuna River since last decay except few surveys. Recent survey was carried out in two stretches of Yamuna River for estimate the population and assesses various threats in Ganges river dolphin. Materials and Methods Study area The Present surveys were carried out in Hamirpur and Fatehpur districts in Uttar Pradesh (Yamuna Bridge to Pathewara village near railway bridge, to down steam of Yamuna-Betwa Confluence, approximate 7 km) and Ekdala (Patian ghat to Chosath Devi temple, approximate 3 km) in which lie two of the GRIDS (from Yamunotri to Allahabad Yamuna River segmented 14 sites after 100 km long stretches that is known as grids) under consideration as part of the