Makrellskjæret

Site 35477 · Flatanger municipality · Production area 7, Nord-Trøndelag med Bindal

Below the lice limit, week 39Operated by Salmar Oppdrett AS · group SalMar

0.02Adult female lice per fishLimit 0.50 · below the limitWeek 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 20 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

0Lice treatments in 2026None recorded2026 · 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

15Wellboat visits in 2026by 4 different vessels · latest 25 Jun 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

Show as table

Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	0.26	0.5	Below the limit
2	0.23	0.5	Below the limit
3	0.35	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	0.00	0.5	Below the limit
24	0.00	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.00	0.5	Below the limit
27	0.00	0.5	Below the limit
28	0.01	0.5	Below the limit
29	0.00	0.5	Below the limit
30	0.01	0.5	Below the limit
31	0.03	0.5	Below the limit
32	0.02	0.5	Below the limit
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	0.02	0.5	Below the limit
38	0.04	0.5	Below the limit
39	0.02	0.5	Below the limit

Earlier years

20254 of 52 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, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.16	0.5	Below the limit
2	0.18	0.5	Below the limit
3	0.15	0.5	Below the limit
4	0.12	0.5	Below the limit
5	0.18	0.5	Below the limit
6	0.19	0.5	Below the limit
7	0.17	0.5	Below the limit
8	0.18	0.5	Below the limit
9	0.21	0.5	Below the limit
10	0.16	0.5	Below the limit
11	0.27	0.5	Below the limit
12	0.19	0.5	Below the limit
13	0.26	0.5	Below the limit
14	0.26	0.5	Below the limit
15	0.24	0.5	Below the limit
16	0.04	0.2	Below the limit
17	0.04	0.2	Below the limit
18	0.04	0.2	Below the limit
19	0.07	0.2	Below the limit
20	0.06	0.2	Below the limit
21	0.04	0.2	Below the limit
22	0.22	0.5	Below the limit
23	0.21	0.5	Below the limit
24	0.15	0.5	Below the limit
25	0.04	0.5	Below the limit
26	0.07	0.5	Below the limit
27	0.07	0.5	Below the limit
28	0.29	0.5	Below the limit
29	0.06	0.5	Below the limit
30	0.32	0.5	Below the limit
31	0.42	0.5	Near the limit
32	0.45	0.5	Near the limit
33	1.23	0.5	Above the limit
34	2.63	0.5	Above the limit
35	2.38	0.5	Above the limit
36	0.28	0.5	Below the limit
37	0.17	0.5	Below the limit
38	0.42	0.5	Near the limit
39	0.40	0.5	Near the limit
40	1.51	0.5	Above the limit
41	0.47	0.5	Near the limit
42	0.49	0.5	Near the limit
43	0.17	0.5	Below the limit
44	0.19	0.5	Below the limit
45	0.28	0.5	Below the limit
46	0.43	0.5	Near the limit
47	0.49	0.5	Near the limit
48	0.46	0.5	Near the limit
49	0.32	0.5	Below the limit
50	0.19	0.5	Below the limit
51	0.24	0.5	Below the limit
52	0.23	0.5	Below the limit

20240 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	Not reported
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	0.03	0.5	Below the limit
39	0.07	0.5	Below the limit
40	0.06	0.5	Below the limit
41	0.04	0.5	Below the limit
42	0.13	0.5	Below the limit
43	0.11	0.5	Below the limit
44	0.15	0.5	Below the limit
45	0.14	0.5	Below the limit
46	0.19	0.5	Below the limit
47	0.16	0.5	Below the limit
48	0.16	0.5	Below the limit
49	0.12	0.5	Below the limit
50	0.10	0.5	Below the limit
51	0.13	0.5	Below the limit
52	0.12	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 50, 2025
Mechanical delousing1 pen
Week 49, 2025
Mechanical delousing1 pen
Week 48, 2025
Mechanical delousing1 pen
Week 47, 2025
Mechanical delousing1 pen

Show all 18

Week 43, 2025
Mechanical delousing4 pens
Week 41, 2025
Mechanical delousing3 pens
Week 39, 2025
Mechanical delousing5 pens
Week 37, 2025
Mechanical delousing5 pens
Week 36, 2025
Mechanical delousing5 pens
Week 33, 2025
Mechanical delousing5 pens
Week 32, 2025
Mechanical delousing2 pens
Week 31, 2025
Mechanical delousing3 pens
Week 29, 2025
Mechanical delousing8 pens
Week 28, 2025
Mechanical delousing1 pen
Week 25, 2025
Other treatment3 pens · FreshWell
Week 24, 2025
Other treatment6 pens · FreshWell
Week 16, 2025
Medicinal bath7 pens · Azamethiphos
Week 15, 2025
Medicinal bath2 pens · Azamethiphos

Disease

Norwegian Food Safety Authority

08 Jul 2024
Infectious salmon anaemia (ISA): closedstarted 26 Sep 2023 · Norwegian Food Safety Authority

Escapes

Directorate of Fisheries

No escapes reported from this site since 2006.

Wellboat visits

15 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
25 Jun 2026	Ronja Aurora	Krabbholmen	4 h 41 min
07 Jun 2026	Ronja Aurora	Bondejorda	4 h 27 min
03 Jun 2026	Ronja Vita	Ratvika	9 h 4 min
29 Jan 2026	Aasvaerfjord	Marøya	1 h 16 min
28 Jan 2026	Aasvaerfjord	Marøya	2 h 17 min
27 Jan 2026	Aasvaerfjord	Marøya	3 h 5 min
26 Jan 2026	Aasvaerfjord	Skrosen	1 h 56 min
23 Jan 2026	Aasvaerfjord	Marøya	2 h 4 min
21 Jan 2026	Aasvaerfjord	Marøya	3 h 37 min
18 Jan 2026	Aasvaerfjord	Marøya	3 h 35 min
17 Jan 2026	Aasvaerfjord	Marøya	3 h 57 min
16 Jan 2026	Aasvaerfjord	Marøya	4 h 21 min

Show 33 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
15 Jan 2026	Aasvaerfjord	Marøya	1 h 31 min
13 Jan 2026	Aasvaerfjord	Marøya	3 h 56 min
07 Jan 2026	Ronja Explorer	Marøya	4 h 32 min
13 Oct 2025	Ronja Naeroeysund	Marøya	7 h 35 min
25 Sep 2025	Ronja Ocean	Melkøya	65 h 33 min
03 Sep 2025	Ronja Explorer	Marøya	2 h 38 min
30 Aug 2025	Ronja Explorer	Marøya	6 h 16 min
28 Aug 2025	Ronja Explorer	Marøya	2 h 1 min
27 Aug 2025	Ronja Explorer	Marøya	3 h 59 min
17 Aug 2025	Ronja Naeroeysund	Marøya	13 h 14 min
14 Aug 2025	Ronja Naeroeysund	Marøya	20 h 16 min
13 Aug 2025	Ronja Naeroeysund	Marøya	13 h 25 min
13 Aug 2025	Ronja Naeroeysund	Marøya	4 h 35 min
12 Aug 2025	Ronja Naeroeysund	Marøya	7 h 58 min
13 Jul 2025	Aasvaerfjord	Tristeinen	50 h 4 min
17 Jun 2025	Ronja Naeroeysund	no other farm	27 h 30 min
16 Jun 2025	Ronja Naeroeysund	no other farm	15 h 24 min
14 Jun 2025	Ronja Naeroeysund	no other farm	27 h 32 min
14 Jun 2025	Ronja Naeroeysund	no other farm	2 h 5 min
18 Apr 2025	Ronja Princess	Hosenøyan	3 h 45 min
17 Apr 2025	Ronja Princess	Hosenøyan	6 h 4 min
17 Apr 2025	Ronja Princess	Hosenøyan	4 h 49 min
16 Apr 2025	Ronja Princess	Hosenøyan	7 h 35 min
16 Apr 2025	Ronja Princess	Hosenøyan	49 min
15 Apr 2025	Ronja Princess	Hosenøyan	2 h 15 min
14 Apr 2025	Ronja Princess	Hosenøyan	6 h 4 min
14 Apr 2025	Ronja Princess	Hosenøyan	4 h 44 min
13 Apr 2025	Ronja Princess	Hosenøyan	4 h 49 min
11 Apr 2025	Ronja Princess	Hosenøyan	5 h 5 min
11 Apr 2025	Ronja Princess	Hosenøyan	4 h 5 min
10 Sep 2024	Ronja Vita	Hallarøy V	8 h 49 min
18 Aug 2024	Ronja Vita	Knubben	10 h 56 min
16 Aug 2024	Ronja Vita	Knubben	4 h 6 min

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

Licences

Site MAB: 6,240 tonnes

Licence	Type	Capacity	Holder
NT F 0016	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT F 0021	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT N 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	860 t	Salmar Oppdrett AS
NT N 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	863 t	Salmar Oppdrett AS

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