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Population dynamics and estimates of production for the calanoid copepod Pseudodiaptomus hessei in a warm temperate estuary
Jerling, H.L.; Wooldridge, T.H. (1991). Population dynamics and estimates of production for the calanoid copepod Pseudodiaptomus hessei in a warm temperate estuary. Est., Coast. and Shelf Sci. 33(2): 121-135
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714, more
Peer reviewed article  

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Keywords
    Biological development; Biomass; Population dynamics; Production; Production; Production; Secondary production; Sexual reproduction; Temperature effects; Pseudodiaptomus hessei (Mrázek, 1894) [WoRMS]; PSW, South Africa, Cape Prov., Sundays Estuary [Marine Regions]; Marine; Brackish water; Fresh water

Authors  Top 
  • Jerling, H.L.
  • Wooldridge, T.H., more

Abstract
    The copepod, Pseudodiaptomus hessei, was studied over 1 year in the Sundays River estuary. Maximum abundance occurred during summer in the upper half of the estuary. Nauplii and copepodid stages attained peak abundance higher up in the estuary compared with adults. Development time and body size were inversely related to temperature and varied between instars. Females took longer to reach maturity than males. Reproduction was continuous. Production estimates integrated over 1 year varied from 0 multiplied by 3 g dry mass/m super(3) at the estuary mouth to 4 multiplied by 3 g dry mass/m super(3) in the upper estuary. Annual P/B ratios varied between 78 multiplied by 5 and 100 multiplied by 2 for the same regions. High production estimates can be linked to high summer temperatures.

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