Biodiversity assessment of sea cage farming sites in Gulf of Mannar, Tamil Nadu, India

Marine fin and shellfish farming is an age old practice across the globe to augment the seafood production and to supplement the protein rich food. The open sea cages are particularly advantageous for maintaining the brood stock of potential species like cobia (Rachycentron canadum) and silver pompano (Trachinotus blochii) for captive breeding. A large congregation of various bioresources are also found to be associated with cage farming (Imelda et al., 2010). In the present study, an attempt was made to understand the biodiversity of the cage farming area at Mandapam in Gulf of Mannar, India

Environmental Valuation and Green Accounting for the future

Environmental valuation is the process of expressing a value for a particular good or service in a context of decision making usually in terms of money or numbers. It's also considered to be a measure or indices of social, biological, ecological and demographic status of the system. Marine and coastal ecosystems provide a wide range of services include the provisioning services, regulating services, cultural services and supporting services. Food provisioning in the form of fisheries catch, aquaculture, ornamentals and bio prospecting is the most vital services from this system. The Total Economic Value of (TEV) consists of use values and non-use values. The use value includes direct use value, indirect use value, and option value, whereas the non-use value is the existence and bequest value. Three approaches are used in the valuation techniques: Slated preference (contingent valuation and choice modelling); Revealed preference (market price, cost-based, production, travel cost); Benefit transfer. The overexploitation of resources, degradation of the ecosystem will directly affect the food security and employment of the coastal population and have an indirect effect on the regional and national economy. To address these issues, environmental valuation is considered to be one of the effective tools for the Scientists and Managers. The green accounting refers to efforts to modify the national income accounts from which GDP and GNP are calculated, to incorporate use and depletion of natural resources. Stocktaking and dimension are the backbone of green and social accounting. The Global Reporting Initiatives (GRI) and International Organization for Standardization (ISO 14000) are the two frameworks developed for social and green accounting. The green accounting has applications in large scale and small scale business organizations. Development and implementation of green accounting will be a challenging issue for the companies coming in the years ahead. It is an interdisciplinary framework includes several magnitudes and divisions of environmental accounting. It needs a sound environmental policy, environmental accounts and their recording and training of the future practitioners to provide technical and legal basis of green auditing. The Kyoto protocol of the Convention on Biological Diversity (CBD) is a legal binding agreement with the developing countries and developed nations designed to reduce six greenhouse gases that are believed to contribute to global warming. The Kyoto Protocol is an environmental accounting in action on an international scal

Ecology and biodiversity of open sea cage farm at Mandapam, India

Farming of marine fin and shellfish species is an age old practice across the globe to augment the seafood demand and to supplement the rich protein food. Fin fish mariculture in India has been a recent initiative and the Central Marine Fisheries Research Institute was successful in developing captive breeding and seed production technique for cobia (Rachycentron canadum) and silver pompano (Trachinotus blochii). The open sea cages are particularly advantageous for maintaining the brood stock of potential species for captive breeding. However, the ecology of the cage farming sites is of paramount importance and should be conducive for the survival, health and growth of fishes that are farmed. In the present study, an attempt was made to understand the ecology and biodiversity of the cage farming area at Mandapam in Gulf of Mannar, south-east coast of India

Observations on the flesh-footed shearwater

A dead specimen of the flesh- footed shearwater Ardenna carneipes (Gould, 1844) was collected on 21.07.2017 from Paravoor beach, Alappuzha district, Kerala. The bird had a total length of 40 cm (bill tip to tail tip) and a wingspan of 86 cm. The specimen was deposited in the National Designated Repository, ICAR- CMFRI, Kochi under the Accession No. Misc.36. The bird is distinguished from other shearwaters in this area, namely, the Persian shearwater, Audubon’s shearwater, Sooty shearwater, Wedge-tailed shearwater, Short-tailed shearwater and Streaked shearwater by its pale bill with distinct black tips. It also has darker underwings and a shorter rounded tail as compared to other shearwaters of the region. Its flight is described as “a stiff-winged glide interspersed with slow lazy flaps” (Kazmierczak, 2015, A field guide to the birds of the Indian Subcontinent, p.34)

कोच्ची की समुद्री स्फुटनशाला में मृदु प्रवाल लोबोफाइटम साक्रोफाइटोइडस का पालन

Culture of soft coral, labophytus sacrophytoides in marine hatchery at Koch

भारत के लूटजानिडे परिवार की मछलियों की बैविघता

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Note on Occurrence of Jaydia queketti (Osteichthyes: Apogonidae) from the Bycatch of Tropical Trawl Fishery

Three specimens of apogonids species of total length 72.69, 106.28 and 110.67 mm were caught off Tuticorin at the depths of 90-100 m as a bycatch on 1st January 2013 from the commercial trawler operated from Tuticorin Fishing Harbour, Southeast coast of India. In this paper, on the occurrence of Jaydia queketti was figured and the comprehensive diagnostic features of the recorded specimens were elucidated. The species of this genus Jaydia is distributed continentally and often caught as a bycatch from shrimp or fish trawl. These species are widely distributed in New Guinea, larger islands in the Coral Sea, Australia, Arabian Sea of India and also from Africa to Japan. Nevertheless, the present observation shows the occurrence of J. queketti from the bycatch of trawl fishery operated along Gulf of Mannar, Southeast coast of India

Biomass and carbon stocks in mangrove stands of Kadalundi estuarine wetland, south-west coast of India

Mangroves are keystone ecosystems which provide numerous environmental services. Mangroves assume significance as standing stores of sequestered atmospheric carbon and are therefore, important in the light of climate change mitigation. In this study, we attempted to assess the biomass of mangroves in the Kadalundi wetland, south-west coast of India and evaluated the potential of these mangroves to sequester and store carbon. The C-stocks of above-ground and root biomass were 83.32±11.06 t C ha-1 and 34.96±4.30 t C ha-1 respectively, while the C-stock in sediment was estimated to be 63.87±8.67 t C ha-1. The estimates of mean combined C-stocks in the mangrove biomass and sediment of Kadalundi shows that this estuarine mangrove wetland stored 182.15 t C ha-1, which was equivalent to 668.48 t CO2 ha-1. The mangroves which cover an area of 13.23 ha in the Kadalundi wetland is assumed to have a potential to sequester and store a substantial quantity of 2,409.84 t C which is equivalent to 8,844.11 t CO2. The study underscores the importance of these intertidal forests for climate change mitigation and stresses the importance of protecting the mangroves which provide many other important ecosystem services that benefit communities

विशेष स्थानिकता और समुद्री जीव जतीयों की संपन्नता के प्रसंग में मान्नार खाडी आवास व्यवस्था की जैवविविधता

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