Prestholmane

Site 11972 · Stavanger municipality · Production area 2, Ryfylke

Near the lice limit, week 39Operated by Seashore Sjø AS · group unknown

0.43Adult female lice per fishLimit 0.50 · near the limitWeek 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Weeks above the limit in 2026of 39 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

9Lice treatments in 2026Latest: Mechanical delousing, week 35, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone recordedRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

23Wellboat visits in 2026by 3 different vessels · latest 28 Aug 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

2Escapes reported2 salmon, December 2021Since 2006 · Directorate of Fisheries · updated 01 Oct 2026

Sea lice against the limit

Weekly average of adult female lice per fish, as reported by the company. For this site the limit is 0.2 in weeks 16–21 and 0.5 for the rest of the year. Hatched weeks have no count and count neither as above nor below.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	0.00	0.5	Below the limit
2	0.00	0.5	Below the limit
3	0.00	0.5	Below the limit
4	0.00	0.5	Below the limit
5	0.02	0.5	Below the limit
6	0.04	0.5	Below the limit
7	0.08	0.5	Below the limit
8	0.04	0.5	Below the limit
9	0.08	0.5	Below the limit
10	0.09	0.5	Below the limit
11	0.11	0.5	Below the limit
12	0.12	0.5	Below the limit
13	0.07	0.5	Below the limit
14	0.20	0.5	Below the limit
15	0.17	0.5	Below the limit
16	0.11	0.2	Below the limit
17	0.14	0.2	Below the limit
18	0.16	0.2	Below the limit
19	0.17	0.2	Near the limit
20	0.03	0.2	Below the limit
21	0.07	0.2	Below the limit
22	0.34	0.5	Below the limit
23	0.03	0.5	Below the limit
24	0.01	0.5	Below the limit
25	0.06	0.5	Below the limit
26	0.36	0.5	Below the limit
27	1.18	0.5	Above the limit
28	0.11	0.5	Below the limit
29	0.23	0.5	Below the limit
30	0.12	0.5	Below the limit
31	0.02	0.5	Below the limit
32	0.04	0.5	Below the limit
33	0.21	0.5	Below the limit
34	0.27	0.5	Below the limit
35	0.04	0.5	Below the limit
36	0.20	0.5	Below the limit
37	0.17	0.5	Below the limit
38	0.28	0.5	Below the limit
39	0.43	0.5	Near the limit

Earlier years

20250 of 2 weeks with a count above the limit

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	unknown	0.5	Not reported
11	unknown	0.5	Not reported
12	unknown	0.5	Not reported
13	unknown	0.5	Not reported
14	unknown	0.5	Not reported
15	unknown	0.5	Not reported
16	unknown	0.2	Not reported
17	unknown	0.2	Not reported
18	unknown	0.2	Not reported
19	unknown	0.2	Not reported
20	unknown	0.2	Not reported
21	unknown	0.2	Not reported
22	unknown	0.5	Not reported
23	unknown	0.5	Not reported
24	unknown	0.5	Not reported
25	unknown	0.5	Not reported
26	unknown	0.5	Not reported
27	unknown	0.5	Not reported
28	unknown	0.5	Not reported
29	unknown	0.5	Not reported
30	unknown	0.5	Not reported
31	unknown	0.5	Not reported
32	unknown	0.5	Not reported
33	unknown	0.5	Not reported
34	unknown	0.5	Not reported
35	unknown	0.5	Not reported
36	unknown	0.5	Not reported
37	unknown	0.5	Not reported
38	unknown	0.5	Not reported
39	unknown	0.5	Not reported
40	unknown	0.5	Not reported
41	unknown	0.5	Not reported
42	unknown	0.5	Not reported
43	unknown	0.5	Not reported
44	unknown	0.5	Not reported
45	unknown	0.5	Not reported
46	unknown	0.5	Not reported
47	unknown	0.5	Not reported
48	unknown	0.5	Not reported
49	unknown	0.5	Not reported
50	unknown	0.5	Not reported
51	0.00	0.5	Below the limit
52	0.00	0.5	Below the limit

20242 of 35 weeks with a count above the limit

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2024
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	unknown	0.5	Not reported
11	unknown	0.5	Not reported
12	unknown	0.5	Not reported
13	0.00	0.5	Below the limit
14	0.00	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.01	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.00	0.2	Below the limit
20	0.00	0.2	Below the limit
21	0.18	0.2	Near the limit
22	0.38	0.5	Below the limit
23	0.41	0.5	Near the limit
24	0.07	0.5	Below the limit
25	0.05	0.5	Below the limit
26	0.04	0.5	Below the limit
27	0.08	0.5	Below the limit
28	0.48	0.5	Near the limit
29	1.61	0.5	Above the limit
30	0.23	0.5	Below the limit
31	0.26	0.5	Below the limit
32	0.39	0.5	Below the limit
33	0.71	0.5	Above the limit
34	0.16	0.5	Below the limit
35	0.23	0.5	Below the limit
36	0.38	0.5	Below the limit
37	0.37	0.5	Below the limit
38	0.43	0.5	Near the limit
39	0.47	0.5	Near the limit
40	0.39	0.5	Below the limit
41	0.42	0.5	Near the limit
42	0.21	0.5	Below the limit
43	0.09	0.5	Below the limit
44	0.20	0.5	Below the limit
45	0.41	0.5	Near the limit
46	0.33	0.5	Below the limit
47	0.47	0.5	Near the limit
48	unknown	0.5	Reported without a count
49	unknown	0.5	Not reported
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

Treatments

Norwegian Food Safety Authority

Week 35, 2026
Mechanical delousingWhole site
Week 31, 2026
Thermal delousing2 pens
Week 30, 2026
Thermal delousing4 pens
Week 28, 2026
Mechanical delousing5 pens

Show all 16

Week 23, 2026
Other treatment, Freshwater treatment2 pens · Freshtherm
Week 20, 2026
Other treatment4 pens · Freshtherm
Week 16, 2026
Medicinal bath, Thermal delousing1 pen · Kaliumklorid (kcl)
Week 8, 2026
Medicinal bath4 pens · Azamethiphos
Week 42, 2024
Mechanical delousing1 pen
Week 40, 2024
Other treatment, Thermal delousing3 pens · Freshtherm
Week 38, 2024
Mechanical delousing2 pens
Week 37, 2024
Mechanical delousing3 pens
Week 34, 2024
Other treatment, Mechanical delousing4 pens · Freshtherm
Week 33, 2024
Other treatment2 pens · Freshtherm
Week 30, 2024
Mechanical delousingWhole site
Week 24, 2024
Other treatmentWhole site · Freshtherm

Disease

Norwegian Food Safety Authority

No cases in the Food Safety Authority's register of notifiable diseases (since 26 Nov 2024).

Escapes

Directorate of Fisheries

12 Dec 2021
2 salmon escapedCause: Foreløpig usikkert · recaptured 1 · Directorate of Fisheries
03 Mar 2019
1 salmon escapedCause: For tidlig å svare på · recaptured 1 · Directorate of Fisheries

Wellboat visits

23 visits in 2026

Visits are derived by us from the Coastal Administration's AIS positions: a fish carrier stationary within 500 metres of the farm for at least 30 minutes. The AIS archive lags about 17 days. A visit is not proof of infection.

Arrival	Vessel	Previous farm (14 days)	Duration
28 Aug 2026	Ronja Queen	Øklandsvågen	9 h 11 min
27 Aug 2026	Ronja Queen	Øklandsvågen	13 h 4 min
27 Aug 2026	Ronja Queen	Øklandsvågen	2 h 45 min
26 Aug 2026	Ronja Queen	Øklandsvågen	21 h 24 min
28 Jul 2026	Ronja Vest	Hidlekjerringa	16 h 39 min
27 Jul 2026	Ronja Vest	Hidlekjerringa	11 h 3 min
26 Jul 2026	Ronja Vest	Hidlekjerringa	58 min
26 Jul 2026	Ronja Vest	Hidlekjerringa	18 h 22 min
25 Jul 2026	Ronja Vest	Hidlekjerringa	5 h 0 min
24 Jul 2026	Ronja Vest	Hidlekjerringa	16 h 8 min
07 Jul 2026	Ronja Queen	Krossholmen	5 h 22 min
07 Jul 2026	Ronja Queen	Krossholmen	6 h 8 min

Show 49 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
06 Jul 2026	Ronja Queen	Krossholmen	19 h 54 min
03 Jun 2026	Ronja Vest	Svollandsneset	18 h 6 min
14 May 2026	Ronja Vest	Oterstegdalen	7 h 23 min
13 May 2026	Ronja Vest	Oterstegdalen	12 h 29 min
12 May 2026	Ronja Vest	Oterstegdalen	12 h 22 min
14 Apr 2026	Ronja Vest	Djupedalen	11 h 40 min
19 Feb 2026	Ronja Queen	Øklandsvågen	5 h 18 min
18 Feb 2026	Ronja Queen	Øklandsvågen	2 h 16 min
18 Feb 2026	Ronja Queen	Øklandsvågen	6 h 31 min
17 Feb 2026	Ronja Queen	Øklandsvågen	4 h 3 min
13 Jan 2026	Seifjell	Leiholmane	2 h 20 min
16 Dec 2025	Ronja Queen	Tittelsnes	6 h 21 min
15 Dec 2025	Ronja Queen	Tittelsnes	7 h 43 min
14 Dec 2025	Ronja Queen	Tittelsnes	3 h 19 min
15 Dec 2024	Ronja Queen	Vindsvik	3 h 43 min
15 Nov 2024	Ronja Queen	Hidlekjerringa	4 h 25 min
03 Nov 2024	Ronja Queen	Øklandsvågen	4 h 9 min
03 Nov 2024	Ronja Queen	Øklandsvågen	2 h 6 min
21 Oct 2024	Ronja Queen	Øklandsvågen	2 h 43 min
20 Oct 2024	Ronja Queen	Svollandsneset	2 h 39 min
18 Oct 2024	Ronja Queen	Svollandsneset	7 h 47 min
17 Oct 2024	Ronja Queen	Svollandsneset	11 h 54 min
15 Oct 2024	Ronja Vest	Øklandsvågen	3 h 27 min
14 Oct 2024	Ronja Vest	Skavhella	3 h 4 min
05 Oct 2024	Ronja Vest	Hidlekjerringa	12 h 22 min
04 Oct 2024	Ronja Vest	Hidlekjerringa	12 h 20 min
18 Sep 2024	Ronja Queen	Øklandsvågen	6 h 15 min
17 Sep 2024	Ronja Queen	Øklandsvågen	21 h 58 min
14 Sep 2024	Ronja Queen	Hesbygrunnen	11 h 10 min
13 Sep 2024	Ronja Queen	Hesbygrunnen	5 h 3 min
24 Aug 2024	Ronja Queen	Hesbygrunnen	2 h 38 min
20 Aug 2024	Ronja Vest	Fusavika	11 h 5 min
19 Aug 2024	Ronja Vest	Fusavika	13 h 13 min
18 Aug 2024	Ronja Vest	Fusavika	21 h 38 min
25 Jul 2024	Ronja Queen	Indre Slettavikneset	4 h 10 min
24 Jul 2024	Ronja Queen	Indre Slettavikneset	13 h 30 min
23 Jul 2024	Ronja Queen	Indre Slettavikneset	20 h 59 min
15 Jun 2024	Ronja Vest	Skaganeset	10 h 42 min
14 Jun 2024	Ronja Vest	Skaganeset	12 h 21 min
13 Jun 2024	Ronja Vest	Skaganeset	1 h 45 min
13 Jun 2024	Ronja Vest	Skaganeset	43 min
13 Jun 2024	Ronja Vest	Skaganeset	10 h 24 min
12 Jun 2024	Ronja Vest	Skaganeset	6 h 6 min
12 Jun 2024	Ronja Vest	Skaganeset	12 h 12 min
10 Apr 2024	Ronja Christopher	Kvaløy Ø	1 h 57 min
24 Mar 2024	Ronja Mistral	Vikane 1	1 h 38 min
23 Mar 2024	Ronja Mistral	Vikane 1	2 h 55 min
22 Mar 2024	Ronja Mistral	Vikane 1	3 h 18 min
21 Mar 2024	Ronja Mistral	Vikane 1	2 h 49 min

Source: Norwegian Coastal Administration (AIS) · calculated by the Salmon Ledger · updated 01 Oct 2026

Licences

Site MAB: 3,120 tonnes

Licence	Type	Capacity	Holder
R FD 0016	Kommersiell / matfiskSalmon, Rainbow trout, Trout	854 t	Seashore Sjø AS
R SS 0008	Kommersiell / matfiskSalmon, Rainbow trout, Trout	854 t	Seashore Sjø AS
R SS 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	854 t	Seashore Sjø AS
R ST 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	854 t	Seashore Sjø AS
R ST 0012	Kommersiell / matfiskSalmon, Rainbow trout, Trout	854 t	Seashore Sjø AS

Source: Directorate of Fisheries, aquaculture register · updated 01 Oct 2026