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Abhilash, K. R.

Occurrence of Live Rhodolith Bed of Lithophyllum kotschyanum Unger (Corallinaceae:Lithophylloideae) in Palk Bay:First Record from India

Abstract Views :627 | PDF Views:118

Authors

C. R. Sreeraj ¹, K. R. Abhilash ¹, V. Deepak Samuel ¹, P. Krishnan ¹, R. Purvaja ¹, R. Ramesh ¹

Affiliations
1 National Centre for Sustainable Coastal Management, Ministry of Environment, Forest and Climate Change, Anna University Campus, Chennai 600 025, IN

Source

Current Science, Vol 114, No 03 (2018), Pagination: 445-446

Abstract

Rhodoliths are nodular form of marine free-living, non-geniculate, crustose coralline red algae, resembling the corals. The communities, in which they dominate are referred to as ‘rhodolith beds’, ‘rhodolites’ or ‘maerl’. Rhodoliths assume different sizes, shapes and forms (small thalli-like, twig-like, large round shaped, branching/unbranching, etc.) based on different factors such as water motion, bioturbation, grazing, fouling, bleaching, etc..

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References

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Differential Bleaching Patterns in Corals of Palk Bay and the Gulf of Mannar

Abstract Views :300 | PDF Views:115

Authors

P. Krishnan ¹, R. Purvaja ¹, C. R. Sreeraj ¹, R. Raghuraman ¹, R. S. Robin ¹, K. R. Abhilash ¹, R. S. Mahendra ², A. Anand ³, M. Gopi ¹, P. C. Mohanty ², K. Venkataraman ¹, R. Ramesh ¹

Affiliations
1 National Centre for Sustainable Coastal Management, Ministry of Environment, Forest and Climate Change, Anna University Campus, Chennai 600 025, IN
2 Indian National Centre for Ocean Information Services, Hyderabad 500 090, IN
3 Regional Remote Sensing Centre, Indian Space Research Organisation, Nagpur 440 010, IN

Source

Current Science, Vol 114, No 03 (2018), Pagination: 679-685

Abstract

The status of reefs in Palk Bay and the Gulf of Mannar was studied during April–May 2016 following a bleach alert, as the sea surface temperature recorded a sudden increase from 30.5°C to 34.0°C in Gulf of Mannar. About 71.48% ± 8.9% of the corals in Palk Bay and 46.04% ± 3.78% in Thoothukkudi group of Islands in Gulf of Mannar were found bleached, showing a clearly decreasing trend from north to south, which could be attributed to the corresponding pattern in intensity of SST recorded in the study sites. Observations of bleaching patterns among different life-forms showed 68% of the bleached corals were massive forms. It was observed that 22 out of the 26 massive forms were bleached, while the Acropora corymbose (ACC), digitate (ACD) and encrusting coral (CE) forms were not bleached in any of the study sites in Palk Bay and Gulf of Mannar. The study suggests that the ACC, ACD and CE forms have adapted to thermal stress, subsequent to the earlier mass bleaching events. The study highlights the need for understanding the molecular mechanism of the association between corals and the symbiotic algae, for further understanding on coral bleaching in Indian waters.

Keywords

Adaptive Coral Bleaching, Gulf of Mannar, Palk Bay.

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References

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Dna Barcoding of the Protected Horned Helmet, Cassis cornuta (Linnaeus 1758)†

Abstract Views :393 | PDF Views:123

Authors

B. Vignesh Kumar ¹, J. V. Anisha Shafni ¹, V. Deepak Samuel ¹, K. R. Abhilash ¹, R. Purvaja ¹, R. Ramesh ¹

Affiliations
1 Conservation of Coastal and Marine Resources Division, National Centre for Sustainable Coastal Management, Ministry of Environment, Forest and Climate Change, Government of India, Anna University Campus, Chennai 600 025, IN

Source

Current Science, Vol 119, No 12 (2020), Pagination: 2014-2019

Abstract

The horned helmet Cassis cornuta (Linnaeus 1758) is the largest of all helmet shells belonging to the family Cassidae. In India, C. cornuta is protected under the Wildlife Protection Act, 1972 (Schedule- I, Part IV-B) due to its conservation importance. Also, it is one of the most sought after tropical marine molluscs in illegal trading. In the present study, we have performed DNA barcoding for this species using the mitochondrial marker gene, cytochrome c oxidase subunit 1 (COI), and deposited the data at GenBank (accession no. MK878541). The evolutionary history was inferred adopting the maximum likelihood method and Kimura 2-parameter model by encompassing representative organisms belonging to the genus Cassis. As C. cornuta is in great demand among shell collectors and is illegally traded across countries, the DNA barcode data available in the public database would provide an additional checkpoint in reducing the chance of unlawful trade of this shell. Further, it strengthens conservation management practices, particularly at the port of entries where portable DNA barcoding facilities are in practice.

Keywords

Cassis cornuta, COI Gene, DNA Barcoding, Protected Species.

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