Atlantic salmon · Salmo salar

Atlantic salmon in the Itchen Navigation

Largest measured atlantic salmon: 73.8 cm

The largest atlantic salmon measured in Environment Agency surveys of the Itchen Navigation was 73.8 cm, recorded at Riverside Park on 20 September 2005.

Across 1,057 measured atlantic salmon, the median measured length was 9.9 cm.

Surveyors recorded weights for 106 atlantic salmon. The median was 0.4 oz (0.011 kg) and the largest recorded weight was 10 lb 10 oz (4.82 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Itchen Navigation.

See atlantic salmon records across England →

Most recent observation27 October 2025Ham Farm · 45 fish

Largest measured atlantic salmon: 73.8 cm
Median length: 9.9 cm
Fish measured: 1,057
Survey locations: 3

Individual EA measurements

Largest measured atlantic salmon

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
73.8 cm	20 Sept 2005	Riverside Park	86392
65.3 cm	20 Sept 2005	Riverside Park	86392
61.5 cm	20 Sept 2005	Riverside Park	86392
60.4 cm	20 Sept 2005	Riverside Park	86392
56.4 cm	20 Oct 2003	Riverside Park	77789
22.6 cm	6 Sept 2011	Ham Farm	127925
19.6 cm	18 Sept 2015	Ham Farm	146671
19.4 cm	18 Sept 2015	Ham Farm	146671
19.3 cm	23 Aug 2017	Ham Farm	151345
19.2 cm	18 Sept 2015	Ham Farm	146671

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where atlantic salmon were found

Each point marks a survey location with at least one atlantic salmon record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyed	First recorded	Last recorded	Visits finding atlantic salmon
Ham Farm	15 Aug 2002	27 Oct 2025	10
Allbrook Lock	18 Sept 2002	19 Sept 2006	3
Riverside Park	20 Oct 2003	20 Sept 2005	2

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2002–2025

Survey records by year

Each bar shows how many survey visits recorded atlantic salmon that year.

202

103

104

105

106

007

008

109

010

111

012

113

014

115

016

117

018

119

020

021

122

123

024

125

Fish measured by surveyors

Measured length distribution

See how the 1,057 measured fish were spread across different length ranges.

Smallest: 0.7 cm
Lower quarter: 8.8 cm
Median: 9.9 cm
Upper quarter: 12.7 cm
Largest: 73.8 cm

0–99 mm

544

100–199 mm

507

200–299 mm

500–599 mm

600–699 mm

700–799 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 106 atlantic salmon. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 0.4 oz (0.01 kg)
Median: 0.4 oz (0.011 kg)
Upper quarter: 0.5 oz (0.014 kg)
Heaviest: 10 lb 10 oz (4.82 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Itchen Navigation

Compare other species with enough survey and measurement data for a detailed page.

European eel Pike Minnow Roach Grayling Brown / sea trout

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →