Fisheries play an important role in the economy of nations bordering the sea and this is especially true in a populous country like India where a large majority continues to live below the poverty line. Sea fishing has been an occupation with the coastal people of India since time immemorial forming an integral part of the maritime heritage. Machanisation has been introduced into the marine fishing with a view to exploit the fisheries potential all along the Indian coastline of 6,500 km by overcoming the deficiencies of the centuries old traditional fishing technology and to augment fish production with a higher fishing effort and also to raise the income levels and living standards of fishermen. The present book, based on the authorâ€™s doctoral dissertation, made a bold and pioneering attempt to evaluate the costs and earnings of mechanised and traditional boats for determining their relative operational efficiency and to examine intensively the effects of mechanisation on employment, income levels, consumption pattern and levels of living of fishermen and their social implications. While analysing the merits of the new fishing technology and also the reactions of different groups of fishermen to mechanisation, he spotlights the shortsightedness in the implementation of the programme of mechanisation resulting in a host of negative effects which have implications and also sets forth the valuable lessons which Indian experiences have to offer to the densely populated littoral nations in the Third World. To ensure enduring benefits to the vast majority of marine fishermen, the thesis underscores, among numerous other remedies the need for the provision of an intermediary technology, the need for the institutional support and marketing network and the need for the management of fisheries resources. It also calls for the policies to bring about socio-economic development of the fishing community on par with the rest of the society. All in all, a genuine contribution to knowledge of `grassroots' situations that will have enduring value and that can be useful in both academic and policy-formation circles.
Reports for 1956-1991 include catalogs of newspapers published in each State and Union Territory.
Fish constitute an important natural renewable resource and any reduction in their ability to propagate as a result of human interference may have significant socioeconomic consequences. The negative effect of human activity on sex differentiation and reproductive output in fish is so diverse that it has been difficult to encompass it in a single book. This book serves as the first attempt to do so. Unlike in mammals, the expression of a host of sex differentiation genes in fish is mostly controlled by environmental factors. Not surprisingly, environmental sex differentiation is ubiquitous in fish. Overexploitation by capture fisheries does not disrupt sex differentiation but crowding in aqua-farms does, by reducing accessibility to food supply. Some of the man-made chemicals routinely used worldwide mimic endogenous hormones. For example endosulfan, which is widely used in developing countries, disrupts endogenous hormones and feminizes fish. For the first time, this book views endocrine disruption from the point of labile early life and non-labile adult stages. It shows that sex can irreversibly be reversed, when exposed to endocrine disrupting chemicals (EDCs) during early labile stages but reversibly impairs reproductive output on exposure to EDCs during non-labile adult stage. A consequence of climate change, elevated temperature, and declining oxygen and pH levels is that it masculinises genetic female fish. Fish display a remarkable ability to postpone the labile period. Besides postponement, some primary and tertiary gonochores have two distinct labile periods amenable to temperature and hormonal manipulations. Hermaphrodites have retained the period until the end of the adult stage and are capable of sex change/reversal more than once in both male and female directions.
v. 12-14 contain special Indian science congress numbers.
This book sets new standards for the documentation of water transport, and introduces styles of boat-building which are unlikely to be found outside the sub-Continent. A fascinating and accessible read for anyone interested in boats or the South Asian way of life, as well as ethnographers, maritime archaeologists and historians, Boats of South Asia covers recent, exhaustive fieldwork in India, Bangladesh and Sri Lanka; and covers a vast array of traditional boats used in the sub-Continent today for fishing and other coastal, riverine tasks.
This expanded and fully updated Second Edition of the mostcomprehensive and successful book on lobsters, comprisescontributions from many of the world’s experts, eachproviding core information for all those working in lobsterbiology, fisheries research and management and lobsteraquaculture. Under the editorship of Bruce Phillips, the Second Edition ofLobsters: Biology, Management, Fisheries and Aquaculturedelivers exhaustive coverage of these fascinating creatures,stretching from growth and development to management andconservation. A number of chapters from the First Edition coveringGrowth, Reproduction, Diseases, Behaviour, Nutrition, Larval andPost-Larval Ecology and Juvenile and Adult Ecology have beenreplaced by new chapters including Lobsters in Ecosystems,Genetics, Translocation, Climate Change, Ecolabelling of Lobsters,Casitas and Other Artificial Shelters, Systems to maximise EconomicBenefits.. These new chapters reflect changes that are occurring inlobster management and new research developments brought on bysocial, climatic and economic changes. As well as information from new research output, information ineach chapter is also included on individual commercial Genera,including aspects of Species and distribution, Predators anddiseases, Ecology and behaviour, Aquaculture and enhancement,Harvest of wild populations and their regulations, Management andconservation. The chapter on slipper lobsters has also beenexpanded to include Thenus and Ibacus species whichare now subject to commercial fisheries. The changes that haveoccurred in some lobster fisheries, the new management arrangementsin place, the status of stocks and the current economic and socialsituation of each fishery have also been covered and discussed ingreat detail. Fisheries scientists, fisheries managers aquaculture personnel,aquatic and invertebrate biologists, physiologists, ecologists,marine biologists and environmental biologists will all findLobsters Second Edition to be a vital source of reference.Libraries in all universities and research establishments wherebiological and life sciences and fisheries and aquaculture arestudied and taught will find it an extremely valuable addition totheir shelves.