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Population dynamics and production of euphausiids: 2. Thysanoessa inermis and T. raschi in the North Sea and American Coastal Waters
Lindley, J.A. (1980). Population dynamics and production of euphausiids: 2. Thysanoessa inermis and T. raschi in the North Sea and American Coastal Waters. Mar. Biol. (Berl.) 59(4): 225-233
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793
Peer reviewed article  
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Trefwoorden
    Abundance
    Population dynamics
    Properties > Physical properties > Weight > Dry weight
    Crustacea [WoRMS]; Euphausiacea [WoRMS]; Thysanoessa Brandt, 1851 [WoRMS]; Thysanoessa inermis (Krøyer, 1846) [WoRMS]
    Marien/Kust
Auteur  Top 
  • Lindley, J.A.
Abstract
    Results from the Continuous Plankton Recorder (CPR) survey for 1966 and 1967 are used to describe seasonal changes in abundance, size and aspects of the population structure of Thysanoessa inermis (Krøyer) and T. raschi (M. Sars) at a depth of 10 m in the North Sea and in American coastal waters from the Grand Banks to the Gulf of Maine. Production and dry weight were estimated from these data. Two year-groups were usually present in the breeding population, the proportion surviving into a second year being higher in American waters than in the North Sea. Annual production for each species was within the range 0.69 to 4.66 mg m-3 and the ratio between production and biomass (P:B) was between 1.3 and 4.2; values outside these ranges were obtained only for American coastal waters in 1967, when the frequency of sampling was low.
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