The elasmobranch fishes include the living sharks, skates and rays that are important members of nearly all marine ecosystems. Their large size, secretive behavior, and wide-ranging habits make them difficult to observe in the field or to maintain in captivity. Consequently, little is known about their natural behavior and how it is mediated by their sensory systems. This volume is dedicated to the scientific contributions and memory of Donald Nelson, a pioneer in the study of shark behavior, sensory biology, and remote instrumentation. The two opening papers review Don Nelson's...

Hypogean (cave, artesian) fishes have fascinated researchers even before they were described in the scientific literature in 1842. Since then, a number of scientists have used them to justify their own evolutionary ideas, from neo-Lamarckism to neo-Darwinism, from neutral evolution to selectionist approaches. Research in recent years has shown that these fishes are much more complex in their adaptations to the subterranean environment than previously believed: there are those with features expected from living in total darkness (complete blindness and depigmentation) and poor in...

Salvelinus species are one of the most thoroughly studied groups of fishes. Many reasons explain this intense interest in charr biology. Charrs have a Holarctic distribution encompassing many Asian, North American, and European countries and occupy diverse marine and freshwater environments. Furthermore, the current distribution of charr includes areas that were directly influenced by climate and topographic change associated with the many Pleistocene glaciations. Undoubtedly, these conditions have promoted much of the tremendous morphological, ecological, and genetic variability and...

GUTSHOP '84 was the fourth in a series of workshops on various aspects of fish feeding (Table 1). Initially, the organizers merely invited regional (Pacific Northwest) fisheries scientists to share, and possibly develop mutual solutions to, the many technical problems associated with trying to obtain meaningful, quantitative information from fish stomach contents, and the subsequent statistical treatment and interpretation of the multivariate data. Since then, although not explicitly based upon any internal cycle, these scientists and increasingly more and more dispersed colleagues continued...

This collection of articles is a sampling of papers vironmental Toxicants and their Effects on the from the second biennial symposium for the 'Etho- Ethology and Behavioral Ecology of Fishes', or- logy and Behavioral Ecology of Fishes'. This con- ganized by Mary Henry and Jack Ward featured ference was also the first North American Meeting invited papers by: John B. Sprague; Mary G. Henry & Gary J. Atchison; as well as contributed papers of the 'International Association of Fish Etholog- ists' and was held October 19-22, 1979 *on the Il- by Robert A. Drummond, Daniel Abel & Chris- linois...

In August of 1980, near the whistlestop of Maltby, Surely, we would plead, the U. S. A., a wealthy Washington, Don Stewart and I met in my rented nation, can fund our proposal if only as a gesture of house trailer to sketch a proposal to the National support to foreign scientists. Somehow, however, Science Foundation. Our goal was simple: to re we seemed to miss deadlines, fall in-between the quest from the Foundation air fare and per diem for cracks, and miss the right connections. It was not approximately 20 Latin American scientists to at until May, 1982, several weeks before the proposed...

The Webster's Seventh New Collegiate Dictionary Environmental Biology of Fishes (EBF), in which defines the first meaning of a 'preface' as 'a my students and I contributed to the concept, its eucharistic prayer of thanksgiving forming in the main attraction became the chance to arrange most Roman rite an introduction to the canon'. Prayer, in one volume, with a new explanatory introduc thanks and introduction cover rather well what I tion and synthesis. During the past three decades interest in early have in mind (after a similar idea by Greenwood life history has mushroomed into a fruitful...

Proceedings from a Symposium on Biology and Management of Sturgeon, held during the 113th Annual Meeting of American Fisheries Society at Milwaukee, Wisconsin, USA, August 16-20, 1983

Weeds are a fascinating study for specialists, not only because of their economic importance, but also since in this case biology must be combined with history and agriculture (and its economic aspects). Thus, weed scientists may be concerned with pure basic research, concentrating on general aspects, or with applied science, i.e. having a practical orientation. One of the aims of this book is to create a synthesis between these two branches of study and to review the literature of both fields. The agrestals, the weeds of arable land ~ the most important group from an economic point of view ~...

The use of tritium as a basic fuel material in a thermonuclear fusion reactor raises particular safety issues due to the combined effects of its physico chemical properties and radioactive nature. Furthermore the possibility of attaining further significant progresses in developing and demonstrating the feasibility of tritium burning devices relies on the handling of tritium macroquantities, say ten grammes, in a safe and reliable manner. It is also undoubted that, apart from technological constraints, any validation and exploitation of thermonuclear fusion as a source of energy will be...