ISSN: 0001-5113 ACTA ADRIAT., UDC: 597(091) AADRAY 49(3): 201 - 232, 2008 Evolutionary steps in ichthyology and new challenges* Walter NELLEN 1* and Jakov DULČIĆ 2 1 Institut for Hydrobiology and Fisheries, University of Hamburg, Olbersweg 24, 22767 Hamburg, Germany 2 Institute of Oceanography and Fisheries, P.O. Box 500, 21 000 Split, Croatia * Corresponding author, e-mail:
[email protected] One may postulate that man’s interest in fish emerged as soon as he was able to express his thoughts and notions as fish, among other animals, were subject of early communications. These were transmitted first by drawings, later by inscriptions and in writings. It was but much later that fishes began to occupy man’s interest as objects of science. Aristotle’s treatises on “History of Ani- mals” is the first known document dealing with fish as a zoological object. No earlier than in the 16th century fish regained the interest of learned men, among these Olaus Magnus (1490 –1557), Gregor Mangolt (1498–1576), Guillaume Rondelet (1507–1557), Pierre Belon (1512–1564), Hip- polyto (Ippolito) Salviani (1513–1572) and, above all, Conrad Gesner (1516–1565). The 17th and more so the 18th century is known as the period of Enlightenment. Respect must be paid to three pioneers in this field, i.e. Francis Willughby (1635–1672), Peter Artedi (1705–1735), and Marc Elieser Bloch (1723–1799) who became clearly aware that the class of fish consists of species which may be classified and typically described as such. After the species concept had been embodied in the scientific way of thinking by Linné, a tremendous expansion of activities emerged in the field of ichthyology.