scholarly journals On the evidence of the Irrawaddy Dolphin Orcaella brevirostris (Owen, 1866) (Mammalia: Cetartiodactyla: Delphinidae) in the Hooghly River, West Bengal, India

2020 ◽  
Vol 12 (8) ◽  
pp. 15905-15908
Author(s):  
Gargi Roy Chowdhury ◽  
Kanad Roy ◽  
Naman Goyal ◽  
Ashwin Warudkar ◽  
Rashid Hassnain Raza ◽  
...  
Keyword(s):  
West Bengal ◽  
Field Work ◽  
Ganges River ◽  
Intensive Monitoring ◽  
River Dolphin ◽  
Irrawaddy Dolphin ◽  
The Ganges

We report the presence and status of the Irrawaddy Dolphin Orcaella brevirostris in the Hooghly River of West Bengal, India.  These observations were made while conducting our field work on the Ganges River Dolphin, which involved vessel-based surveys as well as intensive monitoring from an anchored boat.

scholarly journals Characterization of artisanal fisheries in Nepal and potential implications for the conservation and management of Ganges River Dolphin (Platanista gangetica gangetica)

2015 ◽  
Author(s):  
Shambhu Paudel ◽  
Juan C Levesque ◽  
Camilo Saavedra ◽  
Cristina Pita ◽  
Prabhat Pal
Keyword(s):  
Anthropogenic Activities ◽  
Fishing Effort ◽  
Main Channel ◽  
Artisanal Fisheries ◽  
Ganges River ◽  
River Systems ◽  
River Dolphin ◽  
Main River ◽  
Local Species ◽  
The Ganges

The Ganges River dolphin (Platanista gangetica gangetica) (GRD) is classified as one of the most endangered of all cetaceans in the world and the second scarcest freshwater cetacean. The population is estimated to be less than 2,000 individuals. In Nepal’s Narayani, Sapta Koshi, and Karnali river systems, survival of GRD continues to be threatened by various anthropogenic activities, such as dam construction and interactions with artisanal fisheries. A basic description of the geographic scope, economics, and types of gear used in these fisheries would help managers understand the fishery-dolphin interaction conflict and assist with developing potential solutions to reduce interactions between GRD and local fisheries in Nepal. The main purpose of the study was to collect fishery and socio-economic information by conducting interviews with local fishermen in the Narayani, Sapta Koshi, and Karnali river systems. Based on interviews (n = 163), 79 percent of Nepalese fishermen indicated fishing for local species (e.g., mullet [Rhinomugil corsula] or siloroid catfish [Bagarius bagarius]) was their primary form of income. Fishermen reported fishing effort was greater in summer than winter; greatest in the afternoon (1430 hrs ± 0.27) and during low water level conditions; and gear was set 4.8 ± 0.2 days/week. Fishermen reported using eight different types of monofilament nets (gillnets and cast nets). Sixty percent used gillnets less than 10 m long, and less than one third preferred gillnets between 10 and 100 m long; a few used gillnets longer than 100 m. Fishermen usually set their gear close to their village, and about 50 percent preferred to fish in tributaries followed by the main channel behind sandbars and islands, and the main channel near a bank. Fishermen reported seeing more GRD in the main river stem in winter. In summer, fishermen spotted more GRD in tributaries. Most fishermen told us they believed education, awareness, and changing occupations were important for GRD conservation, but they indicated that occupational options were currently limited in Nepal. Nepalese fishermen acknowledged that fisheries posed a risk to GRD, but they believed water pollution, and dam/irrigation development were the greatest threats.

scholarly journals Status of Ichthyofaunal Diversity of River Ganga in Malda District of West Bengal, India

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Suchismita Medda ◽  
Santi Ranjan Dey
Keyword(s):  
Distribution Pattern ◽  
West Bengal ◽  
Point Of View ◽  
Fish Diversity ◽  
Fish Ecology ◽  
Ganges River ◽  
River Ganges ◽  
The World ◽  
River Ganga ◽  
The Ganges

The river Ganges is the largest river in India and the fifth longest in the world. Although, many studies on fish ecology and systematic have been conducted largely to improve fisheries but fish diversity and their distribution pattern from conservation point of view have never been adequately addressed in the Ganges River . The objective of present study was to explore the present Ichthyofaunal diversity of the stretch of Ganga at Malda district of West Bengal. The result showed that 69 freshwater fish species belonging to 9 Orders, 24 Families was found in Ganga stretch of Malda District of West Bengal, India.

scholarly journals Status of the Ganges river dolphin or shushuk Platanista gangetica in Kaptai Lake and the southern rivers of Bangladesh

Oryx ◽  
2001 ◽  
Vol 35 (01) ◽  
pp. 61 ◽  
Author(s):  
Brian D. Smith ◽  
Benazir Ahmed ◽  
Muhammad Edrise Ali ◽  
Gill Braulik
Keyword(s):  
Ganges River ◽  
River Dolphin ◽  
The Ganges

scholarly journals MRI Examination of Trachea and Bronchi in the Ganges River Dolphin (Platanista gangetica).

1999 ◽  
Vol 61 (10) ◽  
pp. 1137-1141 ◽  
Author(s):  
Hideki ENDO ◽  
Daishiro YAMAGIWA ◽  
Kazuyoshi ARISHIMA ◽  
Masako YAMAMOTO ◽  
Motoki SASAKI ◽  
...  
Keyword(s):  
Ganges River ◽  
River Dolphin ◽  
Mri Examination ◽  
The Ganges ◽  
Trachea And Bronchi

scholarly journals Possible range decline of Ganges River Dolphin Platanista gangetica (Mammalia: Cetartiodactyla: Platanistidae) in Indian Sundarban

2018 ◽  
Vol 10 (13) ◽  
pp. 12738-12748 ◽  
Author(s):  
Sangita Mitra ◽  
Mahua Roy Chowdhury
Keyword(s):  
West Bengal ◽  
Habitat Preferences ◽  
Current Data ◽  
Limiting Factors ◽  
Ganges River ◽  
Factors Affecting ◽  
River Dolphin ◽  
Tidal Water ◽  
Causative Factors ◽  
The Sundarbans

Recent survey reports and observations from rivers in southern West Bengal (India) indicate the extirpation of Ganges River Dolphin (GRD) from the Indian Sundarbans. The present study undertaken during 2011–16 reviews the possible factors accountable for the disappearance of this obligatory freshwater cetacean from the major waterways of the Sundarbans, India and conclude that it is due to reasons of anthropogenic and geo-climatic origin.  Sundarbans, the largest contiguous mangrove forest on earth encompassing almost 10,000km2 of India and Bangladesh is located at the head of the Bay of Bengal within 21.533–22.666 0N and 88.083–89.850 0E, of which 62% lies within Bangladesh and 38% in India (Spalding et al. 2010).  The landscape is a network of mudflats and islands at the deltaic mouth of the rivers Ganga, Brahmaputra and Meghna created by accumulated sediments carried by the snow-fed Himalayan rivers and their tributaries along with anastomosing tidal water channels.  Historic reports reveal the occurrence of GRD in the Sundarbans waters of both India and Bangladesh (Anderson 1879).   Current  data, however, confirms the disappearance of Platanista gangetica but there is continued occurrence of Orcaella brevirostris in the Indian part of the estuary.  Analysis of causative factors in light of existing evidence validates the potential extirpation of Platanista from the majority of the Sundarbans in India, except for its persistence in only the westernmost segment in the lower reaches of river Hooghly as confirmed by this study.  The present study also records the habitat preferences and limiting factors affecting GRD distribution, and maps the decline of its range.

scholarly journals Characterization of the artisanal fishing communities in Nepal and potential implications for the conservation and management of Ganges River Dolphin (Platanista gangetica gangetica)

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1563 ◽  
Author(s):  
Shambhu Paudel ◽  
Juan C. Levesque ◽  
Camilo Saavedra ◽  
Cristina Pita ◽  
Prabhat Pal
Keyword(s):  
Anthropogenic Activities ◽  
Fishing Effort ◽  
Fishing Communities ◽  
Ganges River ◽  
Artisanal Fishing ◽  
River Dolphin ◽  
New Information ◽  
The Ganges ◽  
Primary Form

The Ganges River dolphin (Platanista gangetica gangetica) (GRD) is classified as one of the most endangered of all cetaceans in the world and the second scarcest freshwater cetacean. The population is estimated to be less than 2,000 individuals. In Nepal’s Narayani, Sapta Koshi, and Karnali river systems, survival of GRD continues to be threatened by various anthropogenic activities, such as dam construction and interactions with artisanal fisheries. A basic description of the geographic scope, economics, and types of gear used in these fisheries would help managers understand the fishery-dolphin interaction conflict and assist with developing potential solutions. The main goal was to provide new information on the artisanal fishing communities in Nepal. The specific objectives were to identify, compile, and investigate the demographics, economics, fishing characteristics, and perception of fishermen about GRD conservation in the Narayani, Sapta Koshi, and Karnali rivers so conservation managers can develop and implement a potential solution to the GRD-fishery interaction problem in Nepal. Based on 169 interviews, 79% of Nepalese fishermen indicated fishing was their primary form of income. Fishermen reported fishing effort was greater in summer than winter; greatest in the afternoon (14:30 hrs ± 0:27) and during low water level conditions; and gear was set 4.8 ± 0.2 days/week. Fishermen reported using eight different types of monofilament nets (gillnets and cast nets). Sixty percent used gillnets less than 10 m long, and nearly 30% preferred gillnets between 10 and 100 m long; a few used gillnets longer than 100 m. Most fishermen reported they believed education, awareness, and changing occupations were important for GRD conservation, but they indicated that alternative occupational options were currently limited in Nepal. Nepalese fishermen acknowledged that fisheries posed a risk to GRD, but they believed water pollution, and dam/irrigation developments were the greatest threats.

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