Måren

Site 32977 · Høyanger municipality · Production area 4, Nordhordland til Stadt

Below the lice limit, week 39Operated by Osland Genetics AS · group Osland

Broodstock site: the limit may differ from the general one.

0.01Adult 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 31 weeks with a count · broodstock: limit may differCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

2Lice treatments in 2026Latest: Thermal delousing, week 30, 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

8Wellboat visits in 2026by 2 different vessels · latest 04 Aug 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

3Escapes reported100 rainbow trout, February 2018Since 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. Broodstock site: the limit may differ from the general one.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026Broodstock site: the limit may differ from the general one.

Show as table

Adult female lice per fish per week, 2026
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	Reported without a count
9	0.00	0.5	Below the limit
10	0.00	0.5	Below the limit
11	0.00	0.5	Below the limit
12	0.00	0.5	Below the limit
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	0.00	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.01	0.2	Below the limit
20	0.02	0.2	Below the limit
21	0.06	0.2	Below the limit
22	0.08	0.5	Below the limit
23	0.05	0.5	Below the limit
24	0.07	0.5	Below the limit
25	0.07	0.5	Below the limit
26	0.13	0.5	Below the limit
27	0.33	0.5	Below the limit
28	0.43	0.5	Near the limit
29	0.45	0.5	Near the limit
30	0.11	0.5	Below the limit
31	0.11	0.5	Below the limit
32	0.08	0.5	Below the limit
33	0.05	0.5	Below the limit
34	0.04	0.5	Below the limit
35	0.01	0.5	Below the limit
36	0.01	0.5	Below the limit
37	0.04	0.5	Below the limit
38	0.03	0.5	Below the limit
39	0.01	0.5	Below the limit

Earlier years

20250 of 31 weeks with a count above the limit

Show as table

Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	0.32	0.5	Below the limit
2	0.26	0.5	Below the limit
3	0.40	0.5	Near the limit
4	0.38	0.5	Below the limit
5	0.15	0.5	Below the limit
6	0.12	0.5	Below the limit
7	0.18	0.5	Below the limit
8	0.13	0.5	Below the limit
9	0.23	0.5	Below the limit
10	0.25	0.5	Below the limit
11	0.12	0.5	Below the limit
12	0.46	0.5	Near the limit
13	0.09	0.5	Below the limit
14	0.03	0.5	Below the limit
15	0.17	0.5	Below the limit
16	0.05	0.2	Below the limit
17	0.04	0.2	Below the limit
18	0.18	0.2	Near the limit
19	0.17	0.2	Near the limit
20	0.16	0.2	Below the limit
21	0.17	0.2	Near the limit
22	0.15	0.5	Below the limit
23	0.28	0.5	Below the limit
24	0.27	0.5	Below the limit
25	0.31	0.5	Below the limit
26	0.10	0.5	Below the limit
27	0.38	0.5	Below the limit
28	0.05	0.5	Below the limit
29	0.30	0.5	Below the limit
30	0.30	0.5	Below the limit
31	0.40	0.5	Near the limit
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

20240 of 46 weeks with a count above the limit

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	0.00	0.5	Below the limit
8	0.00	0.5	Below the limit
9	0.00	0.5	Below the limit
10	0.00	0.5	Below the limit
11	0.00	0.5	Below the limit
12	0.00	0.5	Below the limit
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	0.00	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	0.01	0.2	Below the limit
21	0.01	0.2	Below the limit
22	0.00	0.5	Below the limit
23	0.18	0.5	Below the limit
24	0.12	0.5	Below the limit
25	0.10	0.5	Below the limit
26	0.05	0.5	Below the limit
27	0.07	0.5	Below the limit
28	0.04	0.5	Below the limit
29	0.10	0.5	Below the limit
30	0.10	0.5	Below the limit
31	0.06	0.5	Below the limit
32	0.09	0.5	Below the limit
33	0.06	0.5	Below the limit
34	0.20	0.5	Below the limit
35	0.21	0.5	Below the limit
36	0.12	0.5	Below the limit
37	0.10	0.5	Below the limit
38	0.23	0.5	Below the limit
39	0.29	0.5	Below the limit
40	0.03	0.5	Below the limit
41	0.14	0.5	Below the limit
42	0.06	0.5	Below the limit
43	0.14	0.5	Below the limit
44	0.18	0.5	Below the limit
45	0.26	0.5	Below the limit
46	0.42	0.5	Near the limit
47	0.11	0.5	Below the limit
48	0.36	0.5	Below the limit
49	0.42	0.5	Near the limit
50	0.32	0.5	Below the limit
51	0.17	0.5	Below the limit
52	0.19	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 30, 2026
Thermal delousing1 pen
Week 29, 2026
Thermal delousing2 pens
Week 22, 2025
Thermal delousing1 pen
Week 21, 2025
Thermal delousing1 pen

Show all 18

Week 15, 2025
Thermal delousing2 pens
Week 13, 2025
Thermal delousing3 pens
Week 11, 2025
Thermal delousing1 pen
Week 5, 2025
Thermal delousing3 pens
Week 4, 2025
Thermal delousing2 pens
Week 3, 2025
Thermal delousing2 pens
Week 52, 2024
Thermal delousing2 pens
Week 50, 2024
Thermal delousing2 pens
Week 49, 2024
Medicinal feed, Thermal delousing5 pens · Diflubenzuron
Week 48, 2024
Medicinal feed, Thermal delousing3 pens · Diflubenzuron
Week 47, 2024
Medicinal feed, Thermal delousing5 pens · Diflubenzuron
Week 46, 2024
Thermal delousing5 pens
Week 40, 2024
Thermal delousing4 pens
Week 39, 2024
Thermal delousing1 pen

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

06 Feb 2018
100 rainbow trout escapedCause: Ventil · recaptured 1 · Directorate of Fisheries
25 Oct 2017
200 rainbow trout escapedCause: Predator · recaptured 1 · Directorate of Fisheries
05 Apr 2017
26 rainbow trout escapedCause: Ventil · recaptured 1 · Directorate of Fisheries

Wellboat visits

8 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
04 Aug 2026	Langsund	Mjølsvik	1 h 18 min
05 May 2026	Langsund	Søreide	57 min
04 May 2026	Langsund	Søreide	35 min
07 Apr 2026	Ro Chief	Eikebærånæ	30 min
10 Mar 2026	Langsund	Porsvika	1 h 26 min
09 Mar 2026	Langsund	Porsvika	1 h 8 min
20 Feb 2026	Langsund	no other farm	1 h 37 min
19 Feb 2026	Langsund	no other farm	49 min
17 Aug 2025	Ro Master	Porsvika	1 h 19 min
04 Aug 2025	Robas	Hesteneset	1 h 11 min
27 Jul 2025	Ro Master	Sunde	3 h 23 min
14 Jul 2025	Rostein	Instefjord	3 h 14 min

Show 22 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
13 Jul 2025	Rostein	Aldeøyna	1 h 15 min
22 Jun 2025	Rostein	Straumneset	2 h 9 min
18 Jun 2025	Rostein	Kastevika	1 h 10 min
24 May 2025	Robris	Hesteneset	1 h 26 min
20 May 2025	Rostein	Skaganeset	1 h 36 min
05 May 2025	Robas	Instefjord	1 h 15 min
04 May 2025	Robas	Instefjord	1 h 17 min
11 Apr 2025	Ro Server	Kråkenes	6 h 10 min
29 Mar 2025	Ro Arctic	Eikebærånæ	1 h 40 min
02 Mar 2025	Robas	Instefjord	50 min
15 Feb 2025	Robas	Rotøy	1 h 38 min
25 Jan 2025	Ro Server	Instefjord	5 h 10 min
25 Jan 2025	Ro Server	Instefjord	5 h 37 min
24 Jan 2025	Ro Server	Guleskjeret	1 h 57 min
20 Jan 2025	Robris	Hesteneset	1 h 29 min
27 Dec 2024	Ro Server	Hesteneset	14 h 54 min
08 Dec 2024	Ro Server	Sørevik	15 h 40 min
07 Dec 2024	Ro Server	Mjølsvik	1 h 4 min
10 Nov 2024	Ro Server	Mjølsvik	21 h 21 min
09 May 2024	Langsund	Mjølsvik	4 h 10 min
23 Mar 2024	Ro Chief	Orholmen	1 h 46 min
08 Feb 2024	Ro Chief	Sørevik	4 h 43 min

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

Who has reported

The companies that have submitted lice counts for this site, with the first and last week.

Company	From	To
Osland Seafood AS	Week 7, 2024	Week 31, 2025
Osland Genetics AS	Week 8, 2026	Week 39, 2026

Source: Norwegian Food Safety Authority (organisation number on each lice report)

Licences

Site MAB: 3,120 tonnes

Licence	Type	Capacity	Holder
H AV 0093	Kommersiell / matfiskSalmon, Rainbow trout, Trout	710 t	Troland Lakseoppdrett AS
R V 0023	Kommersiell / stamfiskRainbow trout	780 t	Osland Genetics AS
R V 0027	Kommersiell / stamfiskRainbow trout	780 t	Osland Genetics AS
SF HØ 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	1,350 t	Osland Seafood AS
SF HØ 0009	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Osland Seafood AS
SF HØ 0018	Kommersiell / matfiskSalmon, Rainbow trout, Trout	648 t	Osland Seafood AS
SF HØ 0020	Kommersiell / stamfiskRainbow trout	780 t	Osland Genetics AS
SF HØ 0024	Kommersiell / stamfiskRainbow trout	780 t	Osland Genetics AS

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