<div><p>"Zooplankton was sampled between 1 December 2004 and 2 January 2005. Sampling was carried out nine times, and the interval between sampling varied between 3 and 5 days depending on the sea-ice conditions A multiple opening/closing net system (0.25 m2 aperture) equipped with five nets of 100 micron mesh size was used. Daytime vertical hauls were conducted at 0.5 m/sec between 1000 m and the surface, covering five standard depth intervals. The filtered volume was measured for each net by a digital flow meter. The samples were preserved in 4% borax-buffered formaldehyde/seawater solution and analysed for taxa composition, abundance, distribution and age structure."(<a href="https://dx.doi.org/10.1016/j.dsr2.2007.12.013">http://dx.doi.org/10.1016/j.dsr2.2007.12.013</a>)</p></div>
Multinet zooplankton data - mostly copepods - from ANT-XII/2
<div><p>
The mesozooplankton community, with special emphasis on calanoid copepods, was studied with respect to its species composition, abundance, vertical distribution and developmental structure during the Ice Station POLarstern(ISPOL) expedition to the ice-covered western Weddell Sea. Stratified zooplankton tows were carried out nine times between 1 December 2004 and 2 January 2005 with a multiple opening/closing net between 0 and 1000 m depth. Copepods were by far the most abundant taxon, contributing more than 94% of the total mesozooplankton. ... <i>Calanoides acutus</i> and <i>Metridia gerlachei</i> represented other abundant calanoid species contributing an average of 8% and 7%, respectively. All other species comprised less than 3%. ... The Ice Station POLarstern(ISPOL) expedition provided the opportunity to continue the investigations on zooplankton in the western Weddell Sea but in a different season, in spring 2004. The aims of the present study were the analyses of the zooplankton communities under perennial sea ice cover in the western Weddell Sea during the transition from spring to early summer with emphasis on major differences in abundance, vertical distribution and stage composition of the three dominating calanoid copepods <i>Microcalanus pygmaeus</i>, <i>C. acutus</i> and <i>Metridia gerlachei</i>." (<a href="https://dx.doi.org/10.1016/j.dsr2.2007.12.013">http://dx.doi.org/10.1016/j.dsr2.2007.12.013</a>)</p></div>
pangaea_zoo
<div><p>"According to density, samples were split into subsamples (1/2 - 1/32) using a Folsom splitter. Rare taxa and developmental stages were counted from the entire sample. With 10 exceptions, calanoid and harpacticoid copepods were identified to species level, and the sex and developmental stage was also determined. Cyclopoid specimens were only identified to genus level. In the calanoid genera Paraeuchaeta, Scaphocalanus and Lucicutia and the harpactidoid Drescheriella, copepodite stages were not further identified to species level but combined. Mean abundance is given as geometric mean. The mean population stage was calculated according to Marin (1987), and the weighted mean depth after Bollens and Frost (1989). Female copepods of <i>C. acutus</i> and <i>M. gerlachei</i> were sorted from preserved samples, and four different gonad developmental stages were determined according to Runge (1985): immature (stage 1), medium ripe (stage 2), semi-ripe (stage 3) and ripe (stage 4)." (<a href="https://dx.doi.org/10.1016/j.dsr2.2007.12.013">http://dx.doi.org/10.1016/j.dsr2.2007.12.013</a>)</p>
<p>
<b>References:</b></p>
<p>Bollens, S.M. and B.W. Frost, 1989. Predator-induced diel vertical migration in a planktonic copepod, Journal of Plankton Research 11 (5) (1989), pp. 1047 - 1065.</p>
<p>
Marin,V. 1987. The oceanographic structure of the eastern Scotia Sea IV. Distribution of copepod species in relation to hydrography in 1981, Deep-Sea Research I 34 (1) (1987), pp. 105 - 121.
</p>
<p>Runge,J.A., 1985. Relationship of egg production of <i>Calanus pacificus</i> to seasonal changes in phytoplankton availability in Puget Sound, Washington, Limnology and Oceanography 30 (2) (1985), pp. 382 - 396.</p></div>
3361
pangaea_zoo
2010-07-20T17:48:41-04:00
2010-07-20T17:48:41-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:3361
Multinet zooplankton data from R/V Polarstern (ANT-XII_2) in the Western Weddell Sea from 2004-2005 (CMarZ_2004-2010 project)
false
Schiel, S. (2010) Multinet zooplankton data from R/V Polarstern (ANT-XII_2) in the Western Weddell Sea from 2004-2005 (CMarZ_2004-2010 project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 8June2010) Version Date 2010-11-01 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3361 [access date]
true
8June2010
false
2010-11-01
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