Trælsøyosen

Site 29336 · Austevoll municipality · Production area 3, Karmøy til Sotra

Status unknown: not reported in week 39Operated by Lerøy Vest Sjø AS · group Lerøy Seafood Group

unknownAdult female lice per fishNo count in week 39. Latest: 0.48 in week 30, 2025Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

unknownWeeks above the limit in 2026No weeks with a count in 2026Calculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

unknownLice treatments in 2026No lice reports in 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone active · 1 earlierRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Wellboat visits in 2026Latest visit 25 Jun 2025Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

0Escapes reportedNone reportedSince 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.

2025

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

Show as table

Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.06	0.5	Below the limit
2	0.09	0.5	Below the limit
3	0.15	0.5	Below the limit
4	0.28	0.5	Below the limit
5	0.38	0.5	Below the limit
6	0.55	0.5	Above the limit
7	0.13	0.5	Below the limit
8	0.04	0.5	Below the limit
9	0.05	0.5	Below the limit
10	0.06	0.5	Below the limit
11	0.06	0.5	Below the limit
12	0.07	0.5	Below the limit
13	0.07	0.5	Below the limit
14	0.07	0.5	Below the limit
15	0.06	0.5	Below the limit
16	0.10	0.2	Below the limit
17	0.17	0.2	Near the limit
18	0.06	0.2	Below the limit
19	0.01	0.2	Below the limit
20	0.01	0.2	Below the limit
21	0.01	0.2	Below the limit
22	0.04	0.5	Below the limit
23	0.17	0.5	Below the limit
24	0.40	0.5	Near the limit
25	0.27	0.5	Below the limit
26	0.31	0.5	Below the limit
27	0.42	0.5	Near the limit
28	0.68	0.5	Above the limit
29	1.11	0.5	Above the limit
30	0.48	0.5	Near the limit
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	unknown	0.5	Not reported
52	unknown	0.5	Not reported

Earlier years

20241 of 20 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

Show as table

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	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	Reported without a count
33	0.00	0.5	Below the limit
34	0.00	0.5	Below the limit
35	0.00	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.01	0.5	Below the limit
39	0.01	0.5	Below the limit
40	0.00	0.5	Below the limit
41	0.04	0.5	Below the limit
42	0.05	0.5	Below the limit
43	0.09	0.5	Below the limit
44	0.20	0.5	Below the limit
45	0.27	0.5	Below the limit
46	0.62	0.5	Above the limit
47	0.33	0.5	Below the limit
48	0.13	0.5	Below the limit
49	0.18	0.5	Below the limit
50	0.36	0.5	Below the limit
51	0.36	0.5	Below the limit
52	0.11	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 26, 2025
Freshwater treatment, Thermal delousing4 pens
Week 25, 2025
Freshwater treatment, Thermal delousing4 pens
Week 18, 2025
Freshwater treatment, Thermal delousing10 pens
Week 17, 2025
Thermal delousing, Freshwater treatment2 pens

Show all 10

Week 8, 2025
Thermal delousing, Freshwater treatment6 pens
Week 7, 2025
Thermal delousing, Freshwater treatment6 pens
Week 52, 2024
Freshwater treatment, Thermal delousing8 pens
Week 51, 2024
Freshwater treatment, Thermal delousing8 pens
Week 47, 2024
Medicinal bath, Other treatment3 pens · Azamethiphos · Kombi - Ferskvann og Termisk
Week 46, 2024
Medicinal bath4 pens · Azamethiphos

Disease

Norwegian Food Safety Authority

20 Mar 2026
Pancreas disease (PD): closedSubtype SAV3 · started 26 May 2025 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

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
25 Jun 2025	Seihav	Gulholmen disease or zone there	10 h 29 min
24 Jun 2025	Seihav	Gulholmen disease or zone there	8 h 45 min
23 Jun 2025	Seihav	Gulholmen disease or zone there	9 h 11 min
19 Jun 2025	Seigrunn	Sagen 2	13 h 36 min
18 Jun 2025	Seigrunn	Sagen 2	8 h 39 min
17 Jun 2025	Seigrunn	Gulholmen disease or zone there	16 h 55 min
02 May 2025	Seihav	Sagen 2	39 h 59 min
30 Apr 2025	Seihav	Sagen 2	39 h 27 min
29 Apr 2025	Seihav	Sagen 2	12 h 6 min
28 Apr 2025	Seihav	Tepstad	6 h 42 min
27 Apr 2025	Seihav	Tepstad	16 h 54 min
19 Feb 2025	Seihav	Sagen 2	17 h 48 min

Show 21 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
18 Feb 2025	Seihav	Sagen 2	10 h 59 min
17 Feb 2025	Seihav	Sagen 2	2 h 36 min
17 Feb 2025	Seihav	Sagen 2	8 h 20 min
16 Feb 2025	Seihav	Sagen 2	21 h 23 min
15 Feb 2025	Seihav	Sagen 2	13 h 52 min
29 Dec 2024	Seigrunn	Sagen 2	8 h 10 min
28 Dec 2024	Seigrunn	Sagen 2	9 h 43 min
26 Dec 2024	Seigrunn	Skorpo NV	35 h 9 min
21 Dec 2024	Seigrunn	Skorpo NV	12 h 0 min
21 Nov 2024	Seihav	Sagen 2	23 h 32 min
19 Nov 2024	Ronja Azul	Helgøy	15 h 40 min
17 Nov 2024	Ronja Azul	Helgøy	11 h 50 min
17 Nov 2024	Ronja Azul	Helgøy	7 h 49 min
16 Nov 2024	Ronja Azul	Helgøy	4 h 6 min
14 Nov 2024	Ronja Azul	Helgøy	19 h 40 min
14 Nov 2024	Ronja Azul	Helgøy	7 h 23 min
28 Sep 2024	Seifjell	Buarøy	2 h 57 min
07 Aug 2024	Seifjell	Buarøy	1 h 52 min
06 Aug 2024	Seifjell	Buarøy	1 h 53 min
05 Aug 2024	Seifjell	Buarøy	1 h 57 min
04 Aug 2024	Seifjell	Buarøy	2 h 41 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
H AV 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Lerøy Vest Sjø AS
H AV 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Lerøy Vest Sjø AS
H AV 0008	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Lerøy Vest Sjø AS
H AV 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Lerøy Vest Sjø AS

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