000 02688nam  2200349za 4500
0019.845619
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008171017s2017    nscbd  #ob   f000 0 eng d
020 |a978-0-660-23611-7
040 |aCaOODSP|beng
043 |an-cn---
0861 |aFs97-6/3238E-PDF
1001 |aCochrane, N. A.
24510|aMacrozooplankton abundances on the Scotian Shelf using acoustic backscatter and direct sampling methodologies |h[electronic resource] / |cby N.A. Cochrane, D.D. Sameoto, and M.K. Kennedy.
24611|aAbondance de macrozooplancton sur le plateau néo-écossais relevée à l'aide de méthodes de rétrodiffusion acoustique et d'échantillonnage direct
260 |aDartmouth, NS : |bFisheries and Oceans Canada, Maritimes Region, Bedford Institute of Oceanography, |c2017.
300 |aviii, 66 p. : |bmaps, graphs
4901 |aCanadian technical report of fisheries and aquatic sciences, |x1488-5379 ; |v3238
504 |aIncludes bibliographical references.
520 |a"Quantitative measures of Nova Scotian Shelf macrozooplankton abundance, dominated by the euphausiid Meganyctiphanes norvegica, were examined for the period 1961 – 2011. Main results included: 1) Echosounder and Acoustic Doppler Current Profiler (ADCP) backscatter abundances in Emerald Basin generally rising from the mid-1980s, peaking in 1994-95, while continuing to rise on the broader eastern and western shelf areas prior to a widespread, multi-year population crash in fall 2001. 2) Continuous Plankton Recorder (CPR) evidence of a long-term dip in larval euphausiid abundances the late 1990s. 3) Ring net and BIONESS multi-net euphausiid abundances sufficiently sparse and scattered to preclude long term trend delineation 4) Suggestive positive correlations between Emerald Basin column backscatter and both deep Basin temperatures and the North Atlantic Oscillation index. An extended discussion of acoustic methodologies is included. Avenues for further investigation are proposed."--Abstract, p. vi.
546 |aText in English, title and abstract in English and French.
69207|2gccst|aCrustaceans
69207|2gccst|aAquatic wildlife
69207|2gccst|aScientific research
7001 |aKennedy, Mary Kathleen Lewis, |d1956-
7001 |aSameoto, D. D.
7101 |aCanada. |bDepartment of Fisheries and Oceans. |bMaritimes Region.
7102 |aBedford Institute of Oceanography.
830#0|aCanadian technical report of fisheries and aquatic sciences,|x1488-5379 ; |v3238.|w(CaOODSP)9.504449
85640|qPDF|s1.99 MB|uhttps://publications.gc.ca/collections/collection_2017/mpo-dfo/Fs97-6-3238-eng.pdf