LATFRI MONITORING DATA: Mesozooplankton

1.) General description of the data set:

Data sets of mesozooplankton abundances (N/m³) and biomass (mg/m³) of the Baltic Proper from Latvian monitoring. Sampling with Juday net, opening diameter 0.36 m, mesh size 0.16mm. Biomass computation after Hernroth (1985)

2.) Created:

1959

3.) Last update:

2009

4.) Keywords:

Baltic Sea, Monitoring, Zooplankton

5.) Area:

Bornholm Basin, Eastern & Western Gotland Basin, Gulf of Gdansk

6.) Spatial extension:

Latitude: 54.9 - 59.5083333

Longitude: 15.633 - 22.1833

Depth: 26 – 251 m

7.) Spatial resolution:

Horizontally: range of stations per sub-divisions (SD): 1 (SD 27) - 360 (SD 28.2); mean number of sampling stations per season and subdivision: SD25: 2 / SD26: 2-3 / SD27: 1 / SD28.2: 6-10 / SD29: 2

Vertically: range of max. sampling depth: 25 - 175 m / number of sampled depth strata: 1 - 10 / strategy of stratified sampling varied over time: 1977-1996 mainly 0-50m / 50-100m or 0-25 m / 25-50m / 50-100m, from 1997 on surface to max. sampling depth

8.) Time window:

02/1959 - 10/2008

9.) Temporal resolution:

Almost for every year seasonal sampling / main sampling month: Feb, May, Aug, Oct /

1 sampling per season at each station / stations not consistently sampled each year/season

10.) Data:

Mesozooplankton abundances (N/m³) and biomass (mg/m³)

11.) Reference to other data sets:

no

12.) Data quality (degree of validation):

Validated by IHF

13.) Where to find the data?

At LATFRI, IHF

14.) Contact person:

Georgs Kornilovs
Latvian Fisheries Research Institute Riga
6 Daugagrivas Street
LV-1007 Riga , Latvia
Email: georgs_k@latfri.lv

Saskia Otto

Institute for Hydrobiology and Fisheries Science

Hamburg University

Gr. Elbstr. 133, D-22767 Hamburg, Germany

Email: Saskia.Otto@uni-hamburg.de