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It was the age of exploration, the age of empire and conquest, and human beings were extending their reach—and their numbers—as never before. In the process, they were intervening in the world's natural environment in equally unprecedented and dramatic ways. A sweeping work of environmental history, The Unending Frontier offers a truly global perspective on the profound impact of humanity on the natural world in the early modern period. John F. Richards identifies four broadly shared historical processes that speeded environmental change from roughly 1500 to 1800 c.e.: intensified human land use along settlement frontiers; biological invasions; commercial hunting of wildlife; and problem...
Presented here is the final and most coherent section of a sweeping classic work in environmental history, The Unending Frontier. The World Hunt focuses on the commercial hunting of wildlife and its profound global impact on the environment and the early modern world economy. Tracing the massive expansion of the European quest for animal products, The World Hunt explores the fur trade in North America and Russia, cod fishing in the North Atlantic, and whaling and sealing on the world’s oceans and coastlands.
Fisheries science in North America is changing in response to a changing climate, new technologies, an ecosystem approach to management and new thinking about the processes affecting stock and recruitment. Authors of the 34 chapters review the science in their particular fields and use their experience to develop informed opinions about the future. Everyone associated with fish, fisheries and fisheries management will find material that will stimulate their thinking about the future. Readers will be impressed with the potential for new discoveries, but disturbed by how much needs to be done in fisheries science if we are to sustain North American fisheries in our changing climate. Officials ...
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The 100-year story of the International Council for the Exploration of the Sea, a scientific collaboration originally formed by eight northern European nations to address problems of overfishing in the North Atlantic. The author uses archival research and interviews to profile key ICES members and to provide insight into the relationship between fisheries science and biological oceanography. Contains a small section of historical photographs.
Proceedings of the NATO Advanced Research Workshop, Castéra-Verduzan, France, June 1-5, 1987
Whatever theory may be advanced to explain diurnal migration, the underlying reactions involved must be demonstrated conc- sively in the laboratory before the explanation can be ?nally accepted George L. Clarke 1933 p. 434 In oceans and lakes, zooplankton often make diel vertical migrations (DVM), descending at dawn and coming up again in late afternoon and evening. The small animals cover distances of 10–40 m in lakes or even a few hundred metres in the open oceans. Although not as spectacular as migrations of birds or the massive movements of large mammals over the African savannas, the numbers involved are very large and the biomass exceed the bulk of the African herds. For example, in ...
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