Gjerdeviksflua

Site 10324 · Bjørnafjorden municipality · Production area 3, Karmøy til Sotra

Status unknown: not reported in week 39Operated by Bolaks Sjø AS · group Bolaks

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

unknownAdult female lice per fishNo count in week 39. Latest: 0.07 in week 2, 2026Week 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 2 weeks with a count · broodstock: limit may differCalculated 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 recordedRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Wellboat visits in 2026by 1 vessel · latest 16 Jan 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reported3 salmon, July 2020Since 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	0.11	0.5	Below the limit
2	0.07	0.5	Below the limit
3	unknown	0.5	Reported without a count
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

Earlier years

20251 of 41 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	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	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	0.02	0.2	Below the limit
20	0.15	0.2	Below the limit
21	0.01	0.2	Below the limit
22	0.04	0.5	Below the limit
23	0.01	0.5	Below the limit
24	0.01	0.5	Below the limit
25	0.02	0.5	Below the limit
26	0.02	0.5	Below the limit
27	0.47	0.5	Near the limit
28	0.09	0.5	Below the limit
29	0.11	0.5	Below the limit
30	0.09	0.5	Below the limit
31	0.31	0.5	Below the limit
32	0.58	0.5	Above the limit
33	0.28	0.5	Below the limit
34	0.42	0.5	Near the limit
35	0.38	0.5	Below the limit
36	0.16	0.5	Below the limit
37	0.11	0.5	Below the limit
38	0.14	0.5	Below the limit
39	0.23	0.5	Below the limit
40	0.35	0.5	Below the limit
41	0.03	0.5	Below the limit
42	0.11	0.5	Below the limit
43	0.15	0.5	Below the limit
44	0.05	0.5	Below the limit
45	0.10	0.5	Below the limit
46	0.27	0.5	Below the limit
47	0.36	0.5	Below the limit
48	0.43	0.5	Near the limit
49	0.12	0.5	Below the limit
50	0.07	0.5	Below the limit
51	0.07	0.5	Below the limit
52	0.13	0.5	Below the limit

20240 of 18 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	0.07	0.5	Below the limit
2	0.12	0.5	Below the limit
3	0.14	0.5	Below the limit
4	0.00	0.5	Below the limit
5	0.00	0.5	Below the limit
6	0.03	0.5	Below the limit
7	0.00	0.5	Below the limit
8	0.03	0.5	Below the limit
9	0.00	0.5	Below the limit
10	0.02	0.5	Below the limit
11	0.12	0.5	Below the limit
12	0.14	0.5	Below the limit
13	0.03	0.5	Below the limit
14	0.04	0.5	Below the limit
15	0.12	0.5	Below the limit
16	0.08	0.2	Below the limit
17	0.08	0.2	Below the limit
18	0.08	0.2	Below the limit
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	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20230 of 13 weeks with a count above the limit (data from week 40)

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Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
40	0.07	0.5	Below the limit
41	0.12	0.5	Below the limit
42	0.13	0.5	Below the limit
43	0.07	0.5	Below the limit
44	0.05	0.5	Below the limit
45	0.18	0.5	Below the limit
46	0.10	0.5	Below the limit
47	0.18	0.5	Below the limit
48	0.01	0.5	Below the limit
49	0.01	0.5	Below the limit
50	0.02	0.5	Below the limit
51	0.02	0.5	Below the limit
52	0.05	0.5	Below the limit

Treatments

Norwegian Food Safety Authority

Week 49, 2025
Thermal delousing, Freshwater treatmentWhole site
Week 41, 2025
Thermal delousing, Freshwater treatmentWhole site
Week 36, 2025
Thermal delousingWhole site
Week 33, 2025
Thermal delousingWhole site

Show all 13

Week 28, 2025
Freshwater treatment, Thermal delousingWhole site
Week 26, 2025
Thermal delousingWhole site
Week 24, 2025
Thermal delousingWhole site
Week 20, 2025
Medicinal feedWhole site · Diflubenzuron
Week 19, 2025
Medicinal feedWhole site · Diflubenzuron
Week 13, 2024
Thermal delousing, Freshwater treatment6 pens
Week 4, 2024
Thermal delousing, Freshwater treatment10 pens
Week 3, 2024
Thermal delousing, Freshwater treatment2 pens
Week 48, 2023
Thermal delousing, Freshwater treatmentWhole site

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

01 Jul 2020
3 salmon escapedCause: Da vi skulle telle lus under behandling av fisk i merd 5 på Gjerdeviksflua, satt håven seg fast i lusetellingstrakten på fiskeutløpet fra thermoliceren. Dette resulterte i at fiskeutløpet ble delvis sperret, noen fisker havnet på dekk og 3 av de forsvant dessverre over bord. · recaptured 1 · Directorate of Fisheries

Wellboat visits

1 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
16 Jan 2026	Langsund	Instefjord	1 h 23 min
06 Dec 2025	Ronja Vest	Altaneset	11 h 52 min
06 Dec 2025	Ronja Vest	Altaneset	13 h 18 min
05 Dec 2025	Ronja Vest	Altaneset	1 h 55 min
07 Oct 2025	Ronja Vest	Jørstadskjera	7 h 27 min
18 Aug 2025	Ronja Vest	Skiftesneset N	6 h 54 min
17 Aug 2025	Ronja Vest	Skiftesneset N	9 h 32 min
13 Jul 2025	Ro Server	Klavelandet disease or zone there	17 h 13 min
11 May 2024	Norwegian Gannet	Aga Ø	5 h 15 min
07 May 2024	Norwegian Gannet	Oksen	4 h 28 min
23 Apr 2024	Norwegian Gannet	Kunes	9 h 37 min
27 Mar 2024	Ronja Vest	Breivik S	10 h 53 min

Show 3 older visits

Arrival	Vessel	Previous farm (14 days)	Duration
24 Jan 2024	Ronja Vest	Skaganeset	9 h 25 min
23 Jan 2024	Ronja Vest	Skaganeset	17 h 10 min
21 Jan 2024	Ronja Vest	Skaganeset	7 h 24 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
AS Bolaks	Week 40, 2023	Week 49, 2023
Bolaks Sjø AS	Week 50, 2023	Week 3, 2026

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

Licences

Site MAB: 1,560 tonnes

Licence	Type	Capacity	Holder
H FS 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Bolaks Sjø AS
H FS 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Bolaks Sjø AS
H FS 0006	Kommersiell / matfiskSalmon, Rainbow trout, Trout	750 t	Bolaks Sjø AS
H FS 0010	Kommersiell / matfiskSalmon, Rainbow trout, Trout	749 t	Bolaks Sjø AS
H FS 0014	Kommersiell / matfiskSalmon, Rainbow trout, Trout	703 t	Bolaks Sjø AS
H FS 0017	Kommersiell / matfiskSalmon, Rainbow trout, Trout	749 t	Bolaks Sjø AS
H FS 0026	Kommersiell / stamfiskSalmon	780 t	AS Bolaks
H FS 0037	Kommersiell / matfiskSalmon, Rainbow trout, Trout	750 t	Bolaks Sjø AS
H FS 0040	Kommersiell / stamfiskSalmon	780 t	AS Bolaks
H O 0012	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Bolaks Sjø AS
H O 0013	Kommersiell / matfiskSalmon, Rainbow trout, Trout	689 t	Bolaks Sjø AS
H R 0003	Kommersiell / matfiskSalmon, Rainbow trout, Trout	703 t	Bolaks Sjø AS

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