Gerry, I don't know that I'm any kind of artist, unless as fellow Aussies might say,"a bulls**t artist"!I did reply, but it seems to have gone astray, so here's what I tried to post:Have a look at the site below. Counting salmon is made easy because they have to ascend the "ladders" built for them alongside the locks.http://www.the-river-thames.co.uk/environ.htm"In 1979 the Thames Salmon Re-habilitation Scheme was launched in conjunction with the Thames Salmon Trust with the long term aim of restoring a self sustaining Salmon population in the River Thames. The Scheme involves fish rearing and stocking, the construction of Salmon ladders in the weirs upstream in the non-tidal Thames and a programme of evaluation. The last Salmon ladder to be built on the Thames was opened at Boulters Weir on 19 May 2000 by the Duke of Wellington. This completed the current programme and all the weirs from Teddington to Mapledurham now have ladders installed.The Scheme has been successful with a sustained regular run of Salmon since 1982 with a record return of 338 Salmon in 1993. This is despite the fact that the migratory period for the returning Salmon is April to November, with the key period being July and August, which coincides with the period of reduced environmental quality on the tidal Thames due to reduced river flows and increased water temperatures. Unfortunately, since 1993 the numbers of returning Salmon have declined but there are still around 50 a year returning."
Nigel Moore ● 7451d