By Klaus Reutter
This publication offers with chemosensory structures of fishes and covers the well-known olfactory and the gustatory senses in addition to the fewer well known solitary chemosensory cells. Chemosenses play a necessary position within the lifetime of a fish. they assist fish of their look for meals, to devour it and digest it. additionally they support fish to discover their conspecifics and to prevent enemies or predators. Fish reside in various and infrequently severe ecological stipulations usually inhabiting niches comparable to caves or at nice depths within the oceans. The chemosensory organs of such good tailored fish are hugely really expert and developed unlike the chemosenses of sight-hunting fish. Fishes have built assorted techniques to outlive in the generally various water our bodies, owing, at the very least partly, to the hugely advanced chemosensory platforms. a gaggle of across the world reputed experts have contributed to this publication. It includes six chapters dedicated to fish olfaction, one bankruptcy to solitary chemosensory cells and 6 chapters to the fish flavor
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Extra resources for Fish Chemosenses (Teleostean Fish Biology: A Comprehensive Examination of Major Taxa)
2. Only the subepidermal layer gives rise to the olfactory placode and its future cell types. This mode has been found in all teleosts studied so far and is considered a derived (apomorphic) mode of formation. 3. In the plesiomorphic type, the olfactory pit is open to the exterior from the beginning of its formation by invagination. In teleosts the opening mechanism is group specific and differs even in closely related systematic groups. T h e opening results from local cell death in the epidermal layer just above the placode or by retraction of epidermal cells that lose their cell contacts.
R. Melinkat, H. Breucker and J. Kux. 197613. Ultrastructural studies on the epithelia of the olfactory organ of cyprinodonts (Teleostei, Cyprinodontoidea). Cell Tissue Res. 172: 245-267. , H. Breucker and R. Melinkat. 1979. Gross morphology and fine structure of the olfactory organ of rainbow fish (Atheriniformes, Melanotaeniidae). Acta Zool. (Stockholm) 60: 173-186. , J. H. Gruber. 1986. Morphological and electrophysiological studies on the olfactory organ of the lemon shark, Negaprion brevirostris (Poey).
Casual observations show that fish often reject a new food until they recognize/recondition to its new chemical image. However, a recent study demonstrated that each of three amino acids, Cys, Arg or Glu, do individually play dominant roles in fish behaviour (Hara, unpubl. data). 3 Distribution [Expressionl of Amino Acid Receptors in Individual Neurons How are these amino acid receptors expressed and distributed in individual olfactory neurons? In situ hybridization studies tell us that each olfactory receptor gene is expressed in only a small fraction of vertebrate olfactory neurons (for review see Buck, 1996).