Abstract:
Zooplankton was collected from the Canadian Beaufort Sea shelf in July and September 1984, and July to September 1985. In the year 1984, 18 and 16 net samples were collected with a 763 µm Wisconsin and 500 µm neuston gear, respectively, from 18 stations. In the year 1985, 123, 54 and 229 net samples were collected with a 500 µm neuston, 85 µm bongo and 500 µm bongo gear, respectively, from 60 ... stations. Neuston gear sampled at the water surface while other gear sampled the water column. In the year 1984, 309068 plankton specimens were caught, with 64 taxonomic identifications from 15 taxonomic groups (phyla, classes, orders or suborders). In the year 1985 there were 210 taxonomic identifications, representative of 32 taxonomic groups, and a total catch of 22.38 million specimens. Copepods were predominant in all catches. Wet and dry biomass data of individual specimens for most plankton species are given for the samples of the year 1985. The maximum sample dry biomass for the 985 neuston and 500 µm bongo samples was 10.89 and 69.31 g/100 m3 of water filtered, respectively. Length-frequency data are given for 20 species, mostly copepods, captured in 23 (year 1985) 500 µm bongo net samples.
Purpose:
To assess species composition, abundance, distribution and biomass of zooplankton across locations of the Canadian Beaufort Sea Shelf.
Dataset Originator/Creator:
Hopky, G.E. Lawrence, M.J. and Chiperzak, D.B.; Central and Arctic Region, Department of Fisheries and Oceans, Winnipeg, Manitoba R3T 2N6
Dataset Title:
NOGAP B2; Zooplankton Data from the Canadian Beaufort Sea Shelf, 1984 and 1985.
Dataset Series Name:
Canadian Data Report of Fisheries and Aquatic Sciences
Quality
ATTRIBUTE ACCURACY REPORT: The animals counts were done according to convention: sorting under a stereo microscope after preservations. Environmental data were taken with unknown accuracy, but best available method used. Geographical positions taken from ship log before deploying the net.
LOGICAL CONSISTENCY REPORT: The same procedures were used at all sites and ... for all species; findings should be consistent.
COMPLETENESS REPORT: Mesh size used: 333 µm. Thickness of sampled layer: from the bottom to the top in three depth increments bottom-25 m, 25-10 m and 10 m surface. Abundance computed for each taxa per sample as a number of specimens divided by volume of filtered water (estimated by multiplying the net mouth area by tow depth).
HORIZONTAL POSITIONAL ACCURACY REPORT: unknown accuracy, but best available method used
V
ERTICAL POSITIONAL ACCURACY REPORT: unknown accuracy, but best available method used
PROCESS DESCRIPTION: applicable since fully explained in Methodology: see above
These data present a snapshot in time, but are representative for the location and depth where collected. Identification is done where applicable and known; different taxonomies might result into different species names.
Access Constraints
None
Use Constraints
These data cannot be redistributed to third parties.
Although these data have been processed successfully on a computer system at ArcOD, the University of Alaska, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. ... This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a University of Alaska server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The University of Alaska shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Graham, C. H., S. Ferrier, F. Huettmann, C. Moritz and A.T. Peterson 2004 New developments in museum-based informatics and applications in biodiversity analysis. Trends in Ecology and Evolution 19: 497-503
Hopky, G.E., Lawrence, M.J., Chiperzak, D.B. 1994 NOGAP B2; Zooplankton Data from the Canadian Beaufort Sea Shelf, 1984 and 1985. Canadian Data Report of Fisheries and Aquatic Sciences:912.
