Deutsches Ozeanographisches
Datenzentrum Inventur der Alkor-Reise 307 (DOD-Ref-No.20070125)
Inventory of Alkor Cruise 307 (DOD-Ref-No.20070125)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Alkor 307 14.09.2007 - 02.10.2007 IHLS
 
NE Atlantic (Limit 40?W) Orkneys North Sea  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Schmidt Jorn Leibniz-Institut fur Meereswissenschaften an der Universitat Kiel Kiel Kiel Karte
Map
 

Ziel der Reise / Objectives of Cruise:

Physical, biological resarch and fishery oceanography Within the scope of the International Council for the Exploration of the Sea (ICES) since 1972 a continuous research on distribution and abundance of herring larvae has been undertaken in the North Sea and adjacent waters. The main herring spawning grounds in the North Sea are object to this annual survey program which is known as the 'International Herring Larvae Surveys in the North Sea' (IHLS). Almost all countries surrounding the North Sea have participated in the history of the IHLS, while in recent years the Netherlands and Germany contribute most to the surveys. The results of the surveys are used as an important estimator of herring spawning stock biomass and thus are of value for the stock assessment and the estimation of fishing quotas. First aim of this cruise was the implementation of the German part of the IHLS. The ICES area IVa and IVb North Sea were covered partly. Within these areas 122 stations were covered with sampling by double oblique tows with the 'Nackthai' (modified GULF III sampler) and CTD. Herring larval abundance was estimated. Additional sampling of herring larvae for biochemical analyses was performed on 23 stations. Zooplankton was sampled for genetic analysis on 5 stations.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
IFMGEO Schmidt Jorn 5 stations B09
Zooplankton
Gulf III, sampling of Zooplankton for genetic analysis no
IFMGEO Schmidt Jorn 23 stations B09
Zooplankton
Gulf III, sampling of herring larvae for biochemical analysis no
IFMGEO Schmidt Jorn 122 stations B09
Zooplankton
Integrated horizontal zooplankton distribution on station grid no
IFMGEO Schmidt Jorn 123 stations H00
Stations
- yes
IFMGEO Schmidt Jorn 123 stations H10
CTD-Stations
Vertical CTD profiles on station grid yes
23.3.2024