Fish Larval Physiology
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This book is intended as a resource for students and researchers interested in developmental biology and physiology and specifically addresses the larval stages of fish. Fish larvae (and fish embryos) are not small juveniles or adults. Rather they are transitionary organisms that bridge the critical gap between the singlecelled egg and sexually immature juvenile. Fish larvae represent the stage of the life cycle that is used for differentiation, feeding and distribution. The book aims at providing a single-volume treatise that explains how fish larvae develop and differentiate, how they regulate salt, water and acid-base balance, how they transport and exchange gases, acquire and utilise energy, how they sense their environment, and move in their aquatic medium, how they control and defend themselves, and finally how they grow up.
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glands was studied in larval Melanocetus spp. and triplewart seadevil (Cryptopsaras couesii), and metamorphosing bulbous dreamer (Oneirodes eschrichtii), soft leafvent angler (Haplophryne mollis), and Murrays abyssal anglerfish (Melanocetus murrayi) specimens. No or few luminous bacteria were found in the larvae and light glands of recently metamorphosed specimens (Munk and Herring, 1996; Munk et al., 1998). Thus, the functionality of the luminous glands appears to be postponed until the end of
cm2·s1 (Dejours, 1981). The distance across the perivitelline space can be as large as 500 mm (Rombough, 1988b), depending on the size of the egg. Rombough (1988a) interpreted the increase in critical pO2 observed in rainbow trout as an impact of the perivitelline fluid. The critical pO2 of the embryos in relation to metabolic rate increased rapidly at the time when the embryos started to move and thus to stir the PVF. The flexing movement of the embryo stirring the PVF reduces boundary layers
adult studies, our traditional view of the vertebrate circulation is that of a system for internal transport of respiratory gases, metabolic fuels and wastes, pressure and heat. While the circulation of the adult fish may be involved in most if not all of these functions, an argument can be made that the circulation of larval fishes shows distinct transitions in primary function, with emphasis on regulated internal transport of gases and wastes only developing during intermediate and later stages
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