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Thames to Lincolnshire project; From inception to now

The Thames to Lincolnshire (TtL) project commenced in August 2023, when WRT were awarded a £500,000 grant by Natural England. The areas included in the grant ran from the Thames in the south to mid-Lincolnshire. With additional match funding from partnering trusts, the TtL project was able to extend to include South London, Essex and northern Lincolnshire (Figure 1). The project has two main goals, first to extend our trapping area thereby increasing the area in which water vole are protected and secondly, to protect the core area, from mink re-invasion. The funding allowed us to hire staff and purchase nearly 400 more traps to extend the trapping area.

The first step to kick off the project, was to hire staff to install and manage the traps. Within the first few weeks, a Project Manager and five Project Officers were brought on board. As of July 2024, this has increased to 7 Project Officers. The addition of two more Project Officers was possible due to funding by partnering organisations.

The second step was to put out traps into these new areas. At the start of the TtL project there were 168 active traps in project area (Table 1), primarily managed by partnering groups. As of 31st of July 2024, we have increased this to 793 active traps (Table 1). Taking the blue and red areas indicated in Figure 1 together, the total number of active traps at the end of July 2024 was just over 1400.

Figure 1: Map showing WRT project areas. The already heavily trapped area is indicated in Red. The new Thames to Lincolnshire project area is indicated in Blue.

Table 1: Comparison of the number of active traps in the TtL project area counties prior to the start of the project and now

County 31st July 2023 31st July 2024
Bedfordshire 17 66
Essex 39 163
Hertfordshire 51 81
Lincolnshire 75 320
London 13 77
Northamptonshire 5 67
Rutland 1 19
Total 168 793

The number of mink captures during the 12 months since the project began has substantially increased compared to the same period in 2022/23: from 269 to 664 (Table 2). Most notable is that very few mink have been caught in Norfolk and Suffolk this year (Figure 3b) despite heavy trapping (Figure 2), indicating that TtL is providing protection against immigration of mink into the area where mink had effectively been eradicated in Norfolk, Suffolk and eastern Cambridgeshire.

Table 2: Number of mink caught per county positions at 31st July 2024

County 1st Aug 22 – 31st July 23 1st Aug 23 – 31st July 24
Bedfordshire 44 132
Cambridgeshire 43 20
Essex 28 86
Hertfordshire 3 10
Lincolnshire 127 338
London North 0 13
London South 0 0
Norfolk 6 2
Northamptonshire 8 56
Rutland 3 7
Suffolk 7 0
Total 269 664

Figure2 Active smart trap

Figure 3: Comparison of mink captures in a) 1st August 2022 to 31st July 2023 and b) 1st August 2023 to 31st July 2024

a

b

Published On: August 15th, 2024|Categories: Waterlife Recovery Trust|

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