Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Walther Herwig III	WH428	08.07.2019 - 03.08.2019	BTS	North Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Bernreuther Matthias	Thunen-Institut fur Seefischerei	Bremerhaven	Bremerhaven	Karte Map

Ziel der Reise / Objectives of Cruise:

Survey WH 428 covered fisheries research representing the German contribution to the International Bottom Trawl Survey (IBTS) in quarter 3, as well as one component of the two-ship operation in the German Small-scale Bottom Trawl Survey (GSBTS). Both surveys use the same principle fishing methods but at different spatial scales, applying a GOV otter board trawl. A large subset of the fishing hauls is accompanied by hydrographic measurements and investigations of benthic epifauna, infauna and sediments. Bycatch of marine litter in the GOV is reported. The GSBTS is a national program to monitor small-scale variability as well as long term changes in demersal fish assemblages in relation to physical and biological habitat characteristics. In order to fully cover the international IBTS programme, the GSBTS component of the survey (boxes B and D) had to be reduced due to time constraints. The survey started on 08 July 2019 in Bremerhaven, starting with the IBTS on 09 July. Due to technical problems, "Walther Herwig III" returned to Bremerhaven on 20 July. After resolving these problems, the survey continued on 23 July and the remaining program was successfully completed on 02 August. The "Walther Herwig III" returned to Bremerhaven on 03 August 2019.

Messungen / Measurements