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Robin, R. S.
- Milkfish Culture: Alternative Revenue for Mandapam Fisherfolk, Palk Bay, Southeast Coast of India
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Authors
Affiliations
1 Aquaculture Foundation of India, No.4/40. Kabaleswarer Nagar, Neelankarai, Chennai, 600 115, IN
2 Institute for Ocean Management, Anna University, Chennai, 600 025, IN
3 Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, 608 502, IN
4 Department of Zoology, Sri Venkateswara University, Tirupati-517 502, IN
1 Aquaculture Foundation of India, No.4/40. Kabaleswarer Nagar, Neelankarai, Chennai, 600 115, IN
2 Institute for Ocean Management, Anna University, Chennai, 600 025, IN
3 Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, 608 502, IN
4 Department of Zoology, Sri Venkateswara University, Tirupati-517 502, IN
Source
International Journal of Fisheries and Aquaculture Sciences, Vol 3, No 1 (2013), Pagination: 31-43Abstract
Milkfish (Chanos chanos) is one of the most important brackishwater finfish species being cultured in Southeast Asia. Natural milkfish fry occur along the southeast coast of India in fairly large numbers during the months of March-June and October-November. Present study emphasizes the seasonal variation and distribution of milkfish along the southeast coast of India. Milkfish culture has to be economically competitive compared to shrimp and other fish culture which do not contribute to local food supply. Annual total production from the Philippines, Indonesia, and Taiwan has been exceeding 0.5million tons since 2009. The industry has relied on wild-caught milkfish fry, which is unpredictable, until hatchery fry became available in 1987. This paper compares the collection of wild seed near mandapam area as well as production costs in cage. Milkfish eggs (1.1-1.2 mm in diameter) and larvae (3.5 mm at hatching) are pelagic and stay in the plankton for up to 2-3 weeks. This would be a good source of income to coastal fisherfolk in Mandapam.Keywords
Chanos Chanos, Fry, Chinnapalem, Economics
References
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- An Inventory on the Phosphorus Flux of Major Indian Rivers
Abstract Views :255 |
PDF Views:108
Authors
Affiliations
1 National Centre for Sustainable Coastal Management, Ministry of Environment, Forests and Climate Change, Anna University Campus, Chennai 600 025, IN
1 National Centre for Sustainable Coastal Management, Ministry of Environment, Forests and Climate Change, Anna University Campus, Chennai 600 025, IN
Source
Current Science, Vol 108, No 7 (2015), Pagination: 1294-1299Abstract
The biogeochemical cycles of phosphorus in rivers are intimately linked to the processes that occur in terrestrial ecosystems. Riverine networks hold a crucial role in the transfer of nutrients from the land and atmosphere to the coastal oceans and often act as pool for numerous inorganic and organic compounds. Biogeochemical transformation of elements in river network is extensively influenced by catchment alteration and anthropogenic inputs. By means of the rising consciousness of human impact on the excellence of rivers, emphasis is given on rivers, as an ecosystem by itself and also on the river-coast continuum. In this study, the major forcing functions that affect the riverine composition of phosphorus have been examined, in Indian context. An attempt has been made to study and inventorize phosphorus flux from major Indian rivers. Relatively high concentrations of dissolved PO3-4 (dissolved inorganic phosphorus - DIP) are observed in few of the Indian rivers, which may be due to modifications in river catchment. The flow of DIP and particulate inorganic phosphorus to the coastal ocean from Indian rivers is estimated to be about 190 x 103 tonnes year-1 and 1367 x 103 tonnes year-1 respectively. Suspended load is significant in Indian rivers and its cumulative flux is in the order of 1450 x 106 tonnes year-1. The DIP concentration in the Indian rivers is more than twice the concentration observed for the other rivers in the world. Such increased nutrient input into the riverine system reflects the imbalances and alterations in terrestrial sources. Thus, the quantity and quality of nutrient input to the rivers need to be monitored to cope with the existing and future climatic and environmental changes.Keywords
Biogeochemical Processes, Indian Rivers, Nutrient Fluxes, Phosphorus, Water Quality.Full Text
- Differential Bleaching Patterns in Corals of Palk Bay and the Gulf of Mannar
Abstract Views :212 |
PDF Views:75
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
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: 679-685Abstract
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.Full Text
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