Biological traits, and egg and fecal pellet production of Calanus finmarchicus and Calanus glacialis in situ and during experiments ...

• Main Authors: Kjellerup, Sanne, Dünweber, Michael, Swalethorp, Rasmus, Nielsen, Torkel Gissel, Møller, Eva Friis, Markager, Stiig, Hansen, Benni Winding
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Bottle, Niskin 10-L; Basin Scale Analysis, Synthesis and Integration EURO-BASIN; International Polar Year 2007-2008 IPY; Calanus finmarchicus; Calanus glacialis; Disko Bay; Greenland; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.811933; https://doi.pangaea.de/10.1594/PANGAEA.811933

The effects of temperature and food was examined for Calanus finmarchicus and C. glacialis during 3 phases of the phytoplankton spring bloom in Disko Bay, western Greenland. The 2 species were collected during pre-bloom, bloom, and post-bloom and exposed to temperatures from 0 to 10°C, combined with deficient or excess food. Fecal pellet and egg production were measured as indices for grazing and secondary production, respectively. Furthermore, changes in body carbon, nitrogen, and lipid content were measured. C. glacialis sampled before the bloom and incubated with excess food exhibited high specific egg production at temperatures between 0 and 2.5°C. Higher temperatures did not increase egg production considerably, whereas egg production for C. finmarchicus more than tripled between 2.5 and 5°C. Starved C. glacialis produced eggs at all temperatures stimulated by increasing temperatures, whereas starved C. finmarchicus needed temperatures above 5°C to produce eggs fueled by their lipid stores. Few C. ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...