<div><p>Zooplankton samples were collected in October (1997-1999) and December (1998-1999) using a 1-meter<sup>2</sup> MOCNESS tow with 9 nets and 335 micron mesh towed obliquely with the first net open on the down-haul and the other 8 nets sequentially opened on the up-haul. Only the contents of the up-haul nets are reported here, including the temperature and salinity measurements</p></div>
Zooplankton (including Calanus finmarchicus stages) abundance and biomass from MOCNESS tows, Gulf of Maine
<div><p>The primary objective of the project was to quantify the distribution of the diapausing copepod <em>Calanus finmarchicus</em> and its primary invertebrate predators in Wilkinson, Jordan, and Georges basins of the Gulf of Maine.</p></div>
zoo_MOC_GoM
<div><p>Samples were split and photographed using the silhouette photographic method (Davis, 1985) and then the organisms were identified to taxonomic group and their length measured using Matlab based software described by Little & Copley (2003). Biomass for the taxa were calculated using formulae established by Wiebe et al (1975) and Wiebe (1988). <em>Calanus</em> biomass was calculated for each stage and net sample by multiplying the average length of the animals in the sample for that stage by the average wet weight for the same group. One <em>Calanus'</em> average wet wgt = 0.086*{avg. len}^2.809.</p>
<p>Small spheres tend to be copepod eggs, large spheres are usually fish eggs, and egg sacs are typically from the copepod <em>Paraeuchaeta norvegica</em>.</p>
<p><strong>References:</strong></p>
<p>Davis, C. S. and Wiebe, P. H. (1985) Macrozooplankton biomass in a warm-core Gulf Stream ring: time series changes in size structure, taxonomic composition, and vertical distribution. J. Geophys. Res., 90, 8871-8884.</p>
<p>Little, W. S. and Copley, N. J. (2003) WHOI Silhouette DIGITIZER version1.0 User's Guide. In: Woods Hole Oceanogr. Inst. WHOI-2003-05: 66 pp.</p>
<p>Wiebe, P. H., Boyd, S. and Cox, J. L. (1975) Relationship between zooplankton displacement volume, wet weight, dry weight and carbon. Fish. Bull., 73, 777-786.</p>
<p>Wiebe, P. H., Burt, K. H., Boyd, S. H., et al. (1976) A multiple opening/closing net and environmental sensing system for sampling zooplankton. Journal of Marine Research, 34, 313-326.</p>
<p>Wiebe, P. H. (1988) Functional regression equations for zooplankton displacement volume, wet weight, dry weight, and carbon: A correction. Fishery Bulletin, 86, 833-835.</p>
<p>
BCO-DMO data manager processing notes:<br />
* Version 2 (2021-05-18) replaces version 1 (2009-12-23). There was an unsupported character in the source file now fixed after the encoding conversion to utf-8. </p></div>
3285
zoo_MOC_GoM
2010-07-16T16:23:06-04:00
2010-07-16T16:23:06-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:3285
Zooplankton abundance and biomass from MOCNESS tows from R/V Endeavor, R/V Oceanus EN307, OC332, OC334, EN330, EN331 in the Gulf of Maine and Georges Bank from 1997-1999
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Wiebe, P. H. (2021) Zooplankton abundance and biomass from MOCNESS tows from R/V Endeavor, R/V Oceanus EN307, OC332, OC334, EN330, EN331 in the Gulf of Maine and Georges Bank from 1997-1999. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2021-05-18 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3285 [access date]
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