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The functioning and adaptiveness of constructive metabolism in teleost fishes, as manifest in growth and gonad maturation relative to habitat and niche, requires much consideration. The operation of anabolism would seem to depend on a variety of bio-rhythmic processes differing widely in periodicity. The cyclical nature of anabolism, well exemplified in fishes, has suggested that the science of phenology should be recast to cover the study of these tangible aspects of life-history. The book suggests a new definition of phenology, relates it to anabolism and explores it here in teleost fishes.
The great scope of fish phenology is clearlydemonstrated in the present volume. Basic topics include treatment of energy partitioning, accumulation, endocrine control, and response to environmental influences. The timing, magnitude, and fecundity of reproductive commitment is discussed for some of the many ecotypes successfully occupied by the teleosts. A wide range of habitats from savannah pools to the deep sea are considered, as well as phenological modifications required by the migratory life-style of salmonids, seasonality in tropical habitats, and the diminutive adult size seen in many familiar aquarium fishes. Two important areas of fish phenology, not often reviewed, have also been included. These concern the nature of senescence affecting the duration of individual anabolism, and the genetic transmission of growth and reproductive characteristics.
This book features a series of topics developed from theoretical areas to applied sectors of fisheries and fish-culture which will be invaluable for all research workers dealing with fish biology. lt will also be of interest to ecologists, marine and freshwater biologists, evolutionists and fish farmers.