Published online by Cambridge University Press: 05 December 2011
In the middle of the last century many people believed that the living resources of the sea were inexhaustible and that Man by his puny efforts could not influence them to any material extent. At that time fishing was ill-developed. Trawling was limited to the use of the beam trawl, but with the introduction of steam for propulsion of fishing vessels and the hauling of nets, as well as the otter trawl, the intensity of fishing increased to such an extent that many scientists began seriously to doubt the idea of the inexhaustibility of the seas.