T. Shunmugaraj

Ministry of Earth Sciences

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Koushik Sadhukhan

Ministry of Earth Sciences

Chatragadda Ramesh

Ministry of Earth Sciences

M. V. Ramana Murthy

Ministry of Earth Sciences

M. V. Ramana Murthy

Ministry of Earth Sciences

K. V. Dhaneesh

University of Calicut

R. Vinoth

Annamalai University

T T Ajith Kumar

Kumaun University

G.V.M. Gupta

Ministry of Earth Sciences

Jeyaraj Antony Johnson

Wildlife Institute of India

Murthy M.V.R.

Cooperative Institutions

Ministry of Earth Sciences

Annamalai University

Integrated Coastal and Marine Area Management Project Directorate

Government of India

National Centre for Sustainable Coastal Management

Pondicherry University

National Institute of Oceanography

National Bureau of Fish Genetic Resources

National Institute of Ocean Technology

Central Marine Fisheries Research Institute

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Hypersalinity and Low Nitrogen Levels Cause Dwarf Growth in Mangrove Avicennia marina (Forssk.) Vierh.

Proceedings of the National Academy of Sciences India Section B Biological Sciences (2024)

Chatragadda Ramesh Muthukumar Chandrasekaran Koushik Sadhukhan T. Shunmugaraj Murthy Mallavarapu Venkata Ramana

Avicennia marina

Aerial root

Avicennia

10.1007/s40011-023-01532-w

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Citations (2)

Occurrence of unusual swarm of soldier crab, Dotilla myctiroides (H. Milne Edwards, 1852) in Gulf of Mannar, Southeast Coast of India

emergent Life Sciences Research (2019)

Chatragadda Ramesh Koushik Sadhukhan T. Shunmugaraj M. V. Ramana Murthy

10.31783/elsr.2019.516366

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Citations (2)

Coral Reef Associated Gastropods in Tuticorin Coast of Gulf of Mannar Biosphere Reserve, India

Indian Journal of Science and Technology (2010)

J. Mohanraj Jeyaraj Antony Johnson Rakesh Ranjan Lidwin Johnson Uma Pandi

Coral reef associated gastropods diversity study was undertaken in Tuticorin group of islands (Hare, Vaan and Koswari). Underwater survey was made in three quadrants (10 sq.m) in each site. A sum of 40 species of gastropods were recorded from the study area. Most of the species are commonly found in three islands. Twelve were rare viz., Ficus ficus, Colubraria muricata, Casmaria erinaceus, Natica didyma, Nerita polita, Rapana bulbosa, Purpura rudolphi, Strombus sp., Architectonica perspectiva, Cypraea tigris, Cymatium lotorium and Haustellum haustellum were reported form the study area. Species diversity and richness were found to be higher in the Vaan island.

10.17485/ijst/2010/v3i2/29680

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Citations (6)

Exhibition of bleaching resistance via adaptive bleaching pattern by coral reefs of the Gulf of Mannar during massive bleaching event 2019

Journal of Marine Science (2020)

Chatragadda Ramesh Koushik Sadhukhan T. Shunmugaraj M. V. Ramana Murthy

Coral reefs in the Gulf of Mannar (GoM) and Palk Bay regions are facing potential threats from climate change, sedimentation and anthropogenic activities. Considerably, coral reefs in these two regions are highly damaged due to frequent bleaching events caused by increased sea surface temperature (SST) recorded over the past two decades. Recently, during February to May 2019, mass bleaching event of corals was documented again in GoM and Palk Bay regions due to increased sea surface temperatures ranged between 32°C to 36°C. Despite of completely bleached corals, some coral colonies of the same bleached coral species have displayed adaptive bleaching pattern (ABP) for survival. This incidence is displayed by the symbiotic zooxanthellae to protect coral polyps from environmental stress such as elevated temperatures. These observations infer that coral colonies with preferential bleaching pattern ability would serve as environmental stress resisting coral colonies which can be used for restoration activities and cryopreservation. Further studies are needed to explain the potential mechanisms or specific environmental drivers responsible for ABP.

Coral bleaching

Zooxanthellae

Anthozoa

10.30564/jms.v2i2.1666

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Citations (5)

A red alga Portieria hornemannii (Lyngb.) P. C. Silva 1987 (Gigartinales, Rhizophyllidaceae): A source of fragrance ingredient for perfume industry

Chatragadda Ramesh Koushik Sadhukhan T. Shunmugaraj M. V. Ramana Murthy

Ingredient

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Opportunistic infestation of boring sponge Cliona sp. on naturally settled Porites lutea on concrete manhole rings in Vedala

Journal of Terrestrial and Marine Research (2019)

Ramesh Koushik Sadhukhan T. Shunmugaraj M. V. Ramana Murthy

Sponge

Porites

10.32610/jtmr.2019.v03i03.001

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Citations (0)

Baseline Survey on Coral Diseases, Stress Factors and New Threats in Coral Reefs of Gulf of Mannar Marine Biosphere, India

Journal of Marine Science (2019)

Chatragadda Ramesh Koushik Sadhukhan T. Shunmugaraj Murthy M.V.R.

Gulf of Mannar Marine Biosphere Reserve (GOMMBRE) is the first marine biosphere reserve in India and Southeast Asia. It has a rich marine biodiversity including coral reefs, but now facing threats from different environmental factors and anthropogenic interferences. Particularly, coral reefs distributed in the 21 islands under the Gulf of Mannar (GoM) region are facing critical threats. Although several institutions and authors have studied various aspects on corals, direct and indirect influences of natural and anthropogenic catastrophes on corals have been poorly understood. Therefore, the main objective of this study was to identify the anthropogenic disturbances, biological stress factors and diseases on fringing reefs of GoM. The present study reveals that dead coral reefs are being replaced by assemblage of marine algae. Although several diseases were recorded during this study, pink line disease is wide spread in all the islands. Porites sp. and Acropora sp. were the more affected corals. This baseline data lays foundations to survey and to assess the rapid changes that occur over a period of time in coral reefs of GoM.

Aquaculture of coral

Acropora

Porites

Coral reef organizations

Fringing reef

Marine reserve

10.30564/jms.v1i1.835

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Citations (5)

Elevated sea surface temperature triggers massive bloom of Protoperidinium pallidum in Tuticorin coastal waters, southeast coast of Tamil Nadu, India

Journal of the Marine Biological Association of India (2019)

Chatragadda Ramesh Koushik Sadhukhan T. Shunmugaraj M. V. Ramana Murthy