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 |