Raveendra Durgekar

Fisheries By Catch and its Impact on Marine Biodiversity in the Ecologically Fragile Gulf of Mannar Biosphere Reserve

Bycatch being sorted for utilisation.

Rays being landed as by catch along Rameshwaram harbour, Gulf of Mannar.

Sponges, gorgonids and molluscans discarded by trawlers onshore.

Town/RegionCountryCategoriesDate
Gulf of MannarIndiaFish, Indian Sub-continent, Marine16 Oct 2009

The project aims to study the impacts of trawling on marine biodiversity in the Gulf of Mannar Biosphere Reserve of southern India. Situated between the Indian and Sri Lankan coasts, this transboundary region is one of the most fertile and ecologically diverse marine ecosystems of the Indian Ocean region. It has been widely quoted that trawl fishing in the region is causing depletion of not only of commercial fisheries, but also variety of other forms of marine life including endangered species of corals, sponges, fish, sea turtles and sharks that are found in tropical waters.

In addition to being one of the first efforts at systematic documentation of by catch Gulf of Mannar, India, this study will also aim to revise methodologies of by catch assessment for the region, identify fishing gear that are less destructive and provide a set of recommendations that can be incorporated into the management plan of this ecologically sensitive marine protected area.

This project aims to assess and analyse bycatch from bottom trawling in one of the most ecologically important ecosystems along the coast. In addition to providing base line data on the diversity and quantity of different species extracted as by catch, as well as standardising methodologies, this study will form the basis of a long term bycatch assessment for the Gulf of Mannar coast, it is hoped that this study will inform policy interventions towards regulations in fishing gears and practices, promote ecologically sustainable fishing practices and create awareness among communities leading to resolution of conflicts.

For further information contact ravind12@gmail.com

Project Update: September 2010

A rare male Dugong dugong was washed ashore on 23rd September 2010, at Pudhumadam in the Gulf of Mannar range. As per the local forest department post-mortem, it was understood the animal was hit on the head by a trawler and the animal would have become unconscious. It would have drifted for about 4 days before being washed ashore; due to hypersalinity the body wasn’t decomposed much. It was around 6 years old and in good health; the digestive system was in good condition. The total length was 286 cm and width 66 cm.

Final Report

Read more about the activities undertaken and findings of this project in the final report below.

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Final Report711 KB

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