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Books > Science & Mathematics > Biology, life sciences > Zoology & animal sciences > Vertebrates > Fishes (ichthyology)
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The Visual System of Fish (Paperback, Softcover reprint of the original 1st ed. 1990)
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The Visual System of Fish (Paperback, Softcover reprint of the original 1st ed. 1990)
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A question often asked of those of us who work in the seemingly
esoteric field of fish vision is, why? To some of us the answer
seems obvious - how many other visual scientists get to dive in a
tropical lagoon in the name of science and then are able to eat
their subjects for dinner? However, there are better, or at least
scientifically more acceptable, reasons for working on the visual
system of fish. First, in terms of numbers, fish are by far the
most important of all vertebrate classes, probably accounting for
over half (c. 22 000 species) of all recognized vertebrate species
(Nelson, 1984). Furthermore, many of these are of commercial
importance. Secondly, if one of the research aims is to understand
the human visual system, animals such as fish can tell us a great
deal, since in many ways their visual systems, and specifically
their eyes, are similar to our own. This is fortunate, since there
are several techniques, such as intracellular retinal recording,
which are vital to our understanding of the visual process, that
cannot be performed routinely on primates. The cold blooded fish,
on the other hand, is an ideal subject for such studies and much of
what we know about, for example, the fundamentals of information
processing in the retina is based on work carried out on fish (e.
g. Svaetichin, 1953).
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