Herring HELCOM Pan Baltic Scope EFH WS 2018 Proposed map: Spawning - - PowerPoint PPT Presentation

Herring

Baltic Marine Environment Protection Commission

Regional expert workshop on essential fish habitats,

• rganized by Pan Baltic Scope project and HELCOM

Riga, Latvia, 12-13 December 2018 H E

HELCOM Pan Baltic Scope EFH WS 2018

www.panbalticscope.eu

Proposed map: Spawning grounds of herring

2

Habitat requirements for spawning (seabed bottom type and distribution of the major vegetation taxa).

www.panbalticscope.eu

Variables and data used

HELCOM Map and Data service

(http://maps.helcom.fi/website/mapservice/index.html)

Seabed sediments – photic hard bottom

Benthic biotope complexes in the Baltic Sea, based on a combination of geological sediment data (BALANCE) and light availability data (DHI/EuSeaMap).

Fucus sp. distribution

HELCOM HOLAS II Dataset: Fucus distribution (2018).

Furcellaria lumbricalis distribution

HELCOM HOLAS II Dataset: Furcellaria lumbricalis distribution (2018).

Zostera marina distribution

HELCOM HOLAS II Dataset: Zostera marina distribution (2018).

Charophyte distribution

Distribution of Charophytes (Chara spp., Nitella spp., Nitellopsis spp., Tolypella spp.). HELCOM HOLAS II Dataset: Charophyte distribution (2018).

3

www.panbalticscope.eu

Initial feedback from experts

4

Finland waters: The overall map is a pretty good match with the VELMU predictive map describing the distribution and abundance of Baltic herring yolk-sac larvae. In some areas is

• verestimates, and in some under-estimates.

Lithuanian waters: There is no herring spawning in the Curonian lagoon. Russian waters: Herring spawning areas are apparently absent in the eastern part of the Gulf of Finland (Neva Inlet, figures provided).

www.panbalticscope.eu

Proposed way forward

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Use the map on recruitment areas of herring as presented in document 2, after the adjustments proposed to Lithuanian and Russian waters