Deutsches Ozeanographisches
Datenzentrum Inventur der Clupea-Reise 266 (DOD-Ref-No.20120314)
Inventory of Clupea Cruise 266 (DOD-Ref-No.20120314)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Clupea 266 30.10.2012 - 22.11.2012   Baltic Sea  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Polte Patrick Thunen-Institut fur Ostseefischerei Rostock Rostock   

Ziel der Reise / Objectives of Cruise:

As an amendmend to the annual Rugen Herring Larvae Survey (RHLS) conducted during spring, the RAWS survey is designed as a control for the occurrence of autumn spawning activity of Western Baltic Herring stocks. The German Institute of Baltic Sea Fisheries (TI-OF), Rostock monitors the density of herring larvae as a vector of recruitment success within the frame work of the Rugen Herring Larvae Survey (RHLS). It delivers a high-resolution dataset on the herring larvae ecology in the Western Baltic, both temporally and spatially. A sampling grid including 36 stations is sampled weekly using ichthyoplankton- gear (Bongo-net) during the main recruitment period from March to June. If the inshore area is free of ice an additional survey is conducted in February to control for early spawning events. The weekly assessment of the entire sampling area is conducted within two consecutive days. The data collected provide an important baseline for detailed investigation of spawning- and recruitment ecology of Western Baltic spring spawning herring stocks. As a fishery-independent indicator of stock development, the recruitment index is annually incorporated into the HAWG stock assessment.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
VTIOSF Polte Patrick 5 stations B08
Phytoplankton
55 ?m Apstein net. no
VTIOSF Polte Patrick 36 stations B09
Zooplankton
Ichthyoplankton, 335?m, Bongo-net. no
VTIOSF Polte Patrick 36 stations B09
Zooplankton
Ichthyoplankton, 780?m, Bongo-net. no
VTIOSF Polte Patrick 36 stations B13
Eggs/larvae
Ichthyoplankton, 335?m, Bongo-net. no
VTIOSF Polte Patrick 36 stations B13
Eggs/larvae
Ichthyoplankton, 780?m, Bongo-net. no
VTIOSF Polte Patrick 36 stations D01
Current meters
Hydrobios flow meter . no
VTIOSF Polte Patrick 36 stations D90
Other physical oceanographic measurements
Turbidity , Secchi Depth. no
VTIOSF Polte Patrick 36 stations H10
CTD-Stations
CTD, DO [mg/l]. no
VTIOSF Polte Patrick 36 stations H10
CTD-Stations
CTD, SST, Sal. no
VTIOSF Polte Patrick 36 stations H11
Sub-surface measurements underway (T, S)
CTD, SST, Sal. no
VTIOSF Polte Patrick 36 stations H21
Oxygen
CTD, DO [mg/l]. no
VTIOSF Polte Patrick 36 stations H71
Surface measurements underway (T, S)
CTD, SST, Sal. no
VTIOSF Polte Patrick 36 stations M06
Routine standard measurements
Barometric pressure     . no
VTIOSF Polte Patrick 36 stations M06
Routine standard measurements
Weather data according to EU-DCR/DCF . no
23.3.2024