( Salmo salar L.) in the River Spey as determined by

Figure 14 shows a diagram of the area around the confluence and the
positions of the ALSTNs at Avonmouth, Ballindalloch, Dalmench and lower
Tulchan. The position of the NERPB gauging station at Delnashaugh is also
shown.
Lower
Tulchan
ALSTN
disused
railway
bridge
Avonmouth
ALSTN
. . RIVER SPEY
Blacks
Boat
Bridge
road bridge
Delnashaugh
Gau lng
stagon
Dalmench
ALWN
RIVER
AVON
Flgure 14.
Diagram of the River Avon confluence area, showlng the positions of
the ALSTNs and the Delnashaugh gauging station.
Although fish F12.89 reached the confluence of the Avon on 7 May, no
positive record of it entering the tributary was obtained. It subsequently
dropped back down stream reaching the Brae Water Beat Number 5
ALSTN (9.2 km) on 12 May before making a short up-stream migration to
the Holly Bush pool, Delfur (19.7 km), where it remained until contact was
lost through tag failure. Fish F28.89 released on 26 April was last recorded
by the Avonmouth ALSTN on 17 May. No further signals were received for
F12.89 or F28.89 in either the main stem or throughout the length of the
Avon, despite extensive aerial surveys.
Figure 15 shows the movements of F4.89 which was released on 8
February. Also shown are the hourly flow rates recorded at Boat o'Brig
and Delnashaugh. The up-stream progress shown initially by F4.89 was
similar to that shown by other radiodtagged spring salmon. It reached the
Sourden Pool, Delfur (20.9 km) on 20 February and remained there until
mid April.
F4.89 made four approaches to the tributary. The first began from the
Collie Pot, Arndilly (24.8 km) soon after 8 May. The fish reached the
Avonmouth ALSTN on 18 May but did not appear to enter the tributary.
This movement may have been stimulated by a spate occurring in the
tributary on 12 May. The fish subsequently dropped back to Island Roary,
Knockando (41 km), where it remained before ascending to enter the Avon
on 24 May. It rema~ned In the Avon near Delnashaugh Hotel (52 km) before