Monthly means of female prosome lengths of six calanoid copepod species from Helgoland Roads, North Sea


Samples were collected at Helgoland Roads using a Calcofi net (500 µm mesh, 100 cm diameter). When possible, 60 females of the six species Acartia clausi, Centropages hamatus, C. typicus, Paracalanus parvus, Pseudocalanus sp., and Temora longicornis were randomly sorted and their prosome length was measured with an interactive video image digitizing system to the nearest 20 µm (NIH Image 1.55) on a Wild M3/JVC at 40x magnification usually within 6 months after collection. According to Durbin and Durbin (1978) preservation in formalin caused a significant loss in dry weight, carbon and nitrogen in adult females, mostly during the first 24 h; however, it did not significantly affect the C:N ratio or the cephalothorax length of the animals.

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Metadata Access
Creator Hirche, Hans-Juergen (ORCID: 0000-0001-7826-723X); Holtz, Ulrike
Publisher PANGAEA
Contributor Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
Publication Year 2018
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 2391 data points
Discipline Earth System Research
Spatial Coverage (7.900 LON, 54.188 LAT); German Bight, North Sea
Temporal Coverage Begin 1995-01-03T00:00:00Z
Temporal Coverage End 2011-07-05T00:00:00Z