# Commission Delegated Regulation (EU) 2020/687 of 17 December 2019 supplementing Regulation (EU) 2016/429 of the European Parliament and the Council, as regards rules for the prevention and control of certain listed diseases (Text with EEA relevance), Division 1: Surveillance scheme

Extent: E+W+S+N.I.

The establishments and groups of aquaculture establishments keeping listed species within a surveillance zone must undergo surveillance as provided for in Article 98 to check for infection with the relevant category A disease. The surveillance must include health visits, including sampling from production units. Those visits must be carried out by the competent authority in accordance with Tables 1 and 2.
The criteria set out in point 1 of Annex XII, as appropriate for the species, apply to sampling.
Table 1
Scheme for surveillance comprising health visits and samplings in establishments and groups of establishments for category A diseases in aquatic animals, except epizootic hematopoietic necrosis
Category A disease
Number of health visits per year
Number of laboratory examinations per year
Number of animals in the sample
Period of the year for sampling
Residency period of the sampled animals in the establishment
Infection with Mikrocytos mackini
1
1
150
When the prevalence of infection is known to be maximal or April–May, after 3–4 months period when seawater temperatures are less than 10 °C
4 months
Infection with Perkinsus marinus
1
1
150
When the prevalence of infection is known to be maximal or in the month of September, October or November
4 months
Infection with Taura syndrome virus
2
2
150
In the period of the year when water temperature is likely to reach its highest annual level
2 months
Infection with Yellow head syndrome virus
2
2
150
In the period of the year when water temperature is likely to reach its highest annual level
2 months
Table 2
Specific scheme for surveillance comprising health visits and samplings in establishments for epizootic haematopoietic necrosis (EHN) in aquatic animals
The sampling of fish for laboratory examination must be carried out whenever the water temperature is between 11 and 20 °C. The water temperature requirement must also apply to health inspections. In establishments where the water temperature does not reach 11 °C during the year, sampling and health visits must be carried out when the water temperature is at its highest level.
Samples from broodstock must not include gonadal fluids, milt or ova as there is no evidence of EHN causing reproductive tract infection.
Type of establishment
Number of health inspections per year (2 years)
Number of samplings per year (2 years)
Number of fish in the sample
Number of growing fish
Number of brood stock fish
(a) Establishments with broodstock
2
2
150 (first and second inspection)
150 (first or second inspection)
(b) Establishments with broodstock only
2
1
0
150 (first or second inspection)
(c) Establishments without broodstock
2
2
150 (first and second inspection)
0
Maximum number of fish per pool: 10

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Source: https://www.legislation.gov.uk/eur/2020/687/annex/XV/division/SURVEILLANCE/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-687/annex-XV/division-SURVEILLANCE/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.