Nausttaren

Site 34477 · Osen municipality · Production area 6, Nordmøre og Sør-Trøndelag

Below the lice limit, week 39Operated by Bjørøya AS · group unknown

0.35Adult female lice per fishLimit 0.50 · below 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

6Lice treatments in 2026Latest: Mechanical delousing, week 36, 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

7Wellboat visits in 2026by 1 vessel · latest 05 Sep 2026Derived 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.

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	0.02	0.5	Below the limit
2	0.01	0.5	Below the limit
3	0.01	0.5	Below the limit
4	0.02	0.5	Below the limit
5	0.03	0.5	Below the limit
6	0.02	0.5	Below the limit
7	0.08	0.5	Below the limit
8	0.05	0.5	Below the limit
9	0.00	0.5	Below the limit
10	0.07	0.5	Below the limit
11	0.09	0.5	Below the limit
12	0.05	0.5	Below the limit
13	0.10	0.5	Below the limit
14	0.04	0.5	Below the limit
15	0.14	0.5	Below the limit
16	0.08	0.2	Below the limit
17	0.08	0.2	Below the limit
18	0.10	0.2	Below the limit
19	0.09	0.2	Below the limit
20	0.15	0.2	Below the limit
21	0.07	0.2	Below the limit
22	0.10	0.5	Below the limit
23	0.12	0.5	Below the limit
24	0.28	0.5	Below the limit
25	0.38	0.5	Below the limit
26	0.09	0.5	Below the limit
27	0.14	0.5	Below the limit
28	0.23	0.5	Below the limit
29	0.31	0.5	Below the limit
30	0.60	0.5	Above the limit
31	0.06	0.5	Below the limit
32	0.23	0.5	Below the limit
33	0.05	0.5	Below the limit
34	0.02	0.5	Below the limit
35	0.10	0.5	Below the limit
36	0.10	0.5	Below the limit
37	0.16	0.5	Below the limit
38	0.25	0.5	Below the limit
39	0.35	0.5	Below the limit

Earlier years

20250 of 26 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	0.06	0.5	Below the limit
2	0.10	0.5	Below the limit
3	0.05	0.5	Below the limit
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	0.00	0.5	Below the limit
29	unknown	0.5	Reported without a count
30	0.00	0.5	Below the limit
31	0.00	0.5	Below the limit
32	0.00	0.5	Below the limit
33	0.00	0.5	Below the limit
34	0.03	0.5	Below the limit
35	0.03	0.5	Below the limit
36	0.00	0.5	Below the limit
37	unknown	0.5	Not reported
38	0.25	0.5	Below the limit
39	0.25	0.5	Below the limit
40	0.09	0.5	Below the limit
41	0.05	0.5	Below the limit
42	0.02	0.5	Below the limit
43	0.05	0.5	Below the limit
44	0.04	0.5	Below the limit
45	0.00	0.5	Below the limit
46	0.06	0.5	Below the limit
47	0.04	0.5	Below the limit
48	0.06	0.5	Below the limit
49	0.04	0.5	Below the limit
50	0.00	0.5	Below the limit
51	0.03	0.5	Below the limit
52	0.03	0.5	Below the limit

20244 of 50 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	0.00	0.5	Below the limit
2	0.01	0.5	Below the limit
3	0.01	0.5	Below the limit
4	0.01	0.5	Below the limit
5	0.05	0.5	Below the limit
6	0.03	0.5	Below the limit
7	0.02	0.5	Below the limit
8	0.02	0.5	Below the limit
9	0.01	0.5	Below the limit
10	0.01	0.5	Below the limit
11	0.00	0.5	Below the limit
12	0.03	0.5	Below the limit
13	0.00	0.5	Below the limit
14	0.03	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.00	0.2	Below the limit
17	0.02	0.2	Below the limit
18	0.02	0.2	Below the limit
19	0.02	0.2	Below the limit
20	0.06	0.2	Below the limit
21	0.02	0.2	Below the limit
22	0.13	0.5	Below the limit
23	0.18	0.5	Below the limit
24	0.12	0.5	Below the limit
25	unknown	0.5	Not reported
26	0.11	0.5	Below the limit
27	0.12	0.5	Below the limit
28	0.16	0.5	Below the limit
29	0.12	0.5	Below the limit
30	0.46	0.5	Near the limit
31	0.25	0.5	Below the limit
32	0.39	0.5	Below the limit
33	0.31	0.5	Below the limit
34	0.40	0.5	Near the limit
35	0.89	0.5	Above the limit
36	0.08	0.5	Below the limit
37	0.13	0.5	Below the limit
38	2.12	0.5	Above the limit
39	0.49	0.5	Near the limit
40	0.20	0.5	Below the limit
41	0.29	0.5	Below the limit
42	3.11	0.5	Above the limit
43	1.55	0.5	Above the limit
44	0.18	0.5	Below the limit
45	0.43	0.5	Near the limit
46	0.48	0.5	Near the limit
47	0.43	0.5	Near the limit
48	0.26	0.5	Below the limit
49	unknown	0.5	Not reported
50	0.19	0.5	Below the limit
51	0.00	0.5	Below the limit
52	0.07	0.5	Below the limit

20230 of 4 weeks with a count above the limit (data from week 40)

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, 2023
Week	Adult female lice per fish	Lice limit	Status
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	0.00	0.5	Below the limit
50	0.02	0.5	Below the limit
51	0.00	0.5	Below the limit
52	0.00	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 36, 2026
Mechanical delousing5 pens
Week 33, 2026
Mechanical delousing5 pens
Week 30, 2026
Mechanical delousing5 pens
Week 26, 2026
Mechanical delousing3 pens

Show all 16

Week 25, 2026
Mechanical delousing3 pens
Week 20, 2026
Mechanical delousing2 pens
Week 40, 2025
Medicinal feed2 pens · Emamectin benzoat
Week 39, 2025
Medicinal feedWhole site · Emamectin benzoat
Week 48, 2024
Other treatment4 pens · Hydrolicer
Week 44, 2024
Other treatment1 pen · Hydrolicer
Week 43, 2024
Other treatment1 pen · Hydrolicer
Week 40, 2024
Other treatment1 pen · Hydrolicer
Week 39, 2024
Other treatment3 pens · Hydrolicer
Week 36, 2024
Other treatment5 pens · Hydrolicer
Week 31, 2024
Other treatment2 pens · Hydrolicer
Week 30, 2024
Other treatment3 pens · Hydrolicer

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

No escapes reported from this site since 2006.

Wellboat visits

7 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
05 Sep 2026	Njord Kya	Urda	2 h 17 min
04 Sep 2026	Njord Kya	Urda	2 h 44 min
24 Jul 2026	Njord Kya	Ulvan	55 h 31 min
23 Jul 2026	Njord Kya	Ulvan	5 h 52 min
22 Jul 2026	Njord Kya	Lamøya	1 h 50 min
19 Jul 2026	Njord Kya	Lamøya	3 h 20 min
15 May 2026	Njord Kya	Langtaren	49 h 11 min
08 Dec 2025	Njord Kya	Flatøyan	17 h 56 min
07 Dec 2025	Njord Kya	Flatøyan	2 h 17 min
06 Dec 2025	Njord Kya	Flatøyan	30 h 15 min
27 Sep 2025	Ronja Vita	Bjørga	6 h 26 min
26 Sep 2025	Ronja Vita	Bjørga	2 h 11 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
M FI 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
NT F 0026	Kommersiell / matfisk-grønn konvertertSalmon, Rainbow trout, Trout	796 t	Bjørøya AS
NT F 0027	Visning / matfiskSalmon, Rainbow trout, Trout	780 t	Bjørøya AS
ST HE 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	788 t	Måsøval Lisens AS
TR AA 0007	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS
TR F 0011	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,000 t	Måsøval Lisens AS
TR O 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS
TR O 0002	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS
TR O 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	950 t	Bjørøya AS

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