Preliminary results from POLMAR III (April 13-18, 1978) (SUROIT III) ATP, primary production and respiration rates in zooplankton. Complément à la Communication du Groupe Ecophysiologie du Centre Océanologique de Bretagne (SAMAIN et al.)

ATP, primary production and respiration rates in seston, respiration rates in zooplankton have been investigated after the spill by "AMOCO CADIZ". Gross primary production seems to be similar to the normal situation. The rate of photosynthesis is lower at the "AMOCO CADIZ" station than at any of the others. Respiration rates are surprisingly high at the surface. ATP concentra­tion exhibit an homogeneous pattern, zooplankton respiration are similar to the data obtained in Peruvian upwelled waters or in zooplankton culture. A more detailed computation of data will be necessary before concluding.Des mesures de l'ATP, de la production primaire et des taux respi­ratoires du seston, des taux respiratoires du zooplancton ont été effectuées après le naufrage de l"AMOCO CADIZ". La production primaire moyenne est du même ordre de grandeur que dans la situation normale. La vitesse de photosyn­thèse est inférieure à la station proche de l"AMOCO CADIZ" comparativement à toutes les autres stations. Les taux respiratoires sont curieusement élevés en surface. La concentration en ATP est homogène sur la zone, les taux respi­ratoires du zooplancton concordent avec les observations effectuées dans l'upwelling péruvien ou sur des cultures de copépodes. Un traitement plus détaillé des données est nécessaire avant d'en déduire des conclusions

High resolution vertical distribution of the copepod Calanus chilensis in relation to the shallow oxygen minimum zone off northern Peru using LOKI, a new plankton imaging system

The vertical distribution of copepodite stage V and adult Calanus chilensis was studied on two transects across the Humboldt Current System off northern Peru using the LOKI system. LOKI is an optical plankton recorder, which simultaneously collects images of zooplankton and environmental data such as temperature, salinity, oxygen, and fluorescence. Image quality allowed determination of CV, females and males and identification of C. chilensis from 3 co-occurring Calanid copepods. C. chilensis was inhabiting the upper 250 m. Highest abundances with a maximum of ca. 44.000 Ind. m−2 were observed in a narrow band within Cold Coastal Water at stations closest to the coast, coinciding with the Poleward Undercurrent. This raises questions for the life cycle closure within the Humboldt Current system. In contrast to observations in the southern part of the Humboldt Current System, the three stages studied were most abundant in hypoxic waters at oxygen concentrations between 5 and 50 µM. Thus C. chilensis seems to be the only species of the family Calanidae where not only a resting stage can tolerate hypoxia, but also both adult stages. This impacts availability to predators, as despite a locally high biomass only part of the population is available to anchovy and other important fish species which are restricted to waters with higher oxygen concentrations

Data report of RV 'Polarstern'. Cruise ARK IV/1,1987 to the Arctic and polar fronts

SIGLETIB Hannover: RN 9219(44) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Oekosystem Arktischer/Antarktischer Ozean Abschlussbericht

Available from TIB Hannover: F98B2193+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

The 1993 Northeast Water Expedition 1993 Scientific cruise report of RV 'Polarstern' Artic cruises ARK IX/2 and 3, USCG 'Polar Sea' cruise NEWP and the NEWLand expedition

The expeditions ARK IX/2 and 3 of RV 'Polarstern' to the Northeast Water Polynya (NEW) off Greenland was part of the main field phase of the International Arctic Polynya Programme (IAPP) under the umbrella of the Arctic Ocean Sciences Board (AOSB). The other components were the USCG icebreaker 'Polar Sea' and the NEWland program. While 'Polar Sea' continued to measure core parameters and time series stations after the departure of Polarstern, the NEWland scientists worked continuously on the shore side between May and August. The major goal of the programme was a detailed study of the generation mechanisms of the polynya and its ecosystem and the effect of the polynya on the adjacent land ecosystem. Physical, biological, chemical and geological programmes were performed at sea to obtain a complete data set from this area. Observations of ice coverage, ice conditions and drift completed the study; on shore, in addition an archeological project was included. (orig.)SIGLEAvailable from TIB Hannover: RN 9219(142) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

The 1993 Northeast Water Expedition Data Report of RV 'Polarstern' Arctic Cruises ARK IX/2 and 3

The expeditions ARK IX/2 and 3 of RV 'Polarstern' to the Northeast Water Polynya (NEW) off Greenland was part of the main field phase of the International Arctic Polynya Programme (IAPP) under the umbrella of the Arctic Ocean Sciences Board (AOSB). The major goal of the programme was a detailed study of the generation mechanisms of the polynya and its ecosystem and the effect of the polynya on the adjacent land ecosystem. Physical, biological, chemical and geological programmes were performed at sea to obtain a complete data set from this area. (orig.)Available from TIB Hannover: RN 9219(145) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Comparative seasonal dynamics of Centropages typicus at seven coastal monitoring stations in the North Sea, English Channel and Bay of Biscay

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