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Implications for current management advice for North Sea plaice (Pleuronectes platessa L.): Part II. Increased biological realism in recruitment, growth, density-dependent sexual maturation and the impact of sexual dimorphism and fishery discards
Kell, L.T.; Bromley, P.J. (2004). Implications for current management advice for North Sea plaice (Pleuronectes platessa L.): Part II. Increased biological realism in recruitment, growth, density-dependent sexual maturation and the impact of sexual dimorphism and fishery discards. J. Sea Res. 51(3-4): 301-312. https://dx.doi.org/10.1016/j.seares.2003.11.001
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414
Also appears in:
Geffen, A.J.; Nash, R.D.M.; van der Veer, H.W. (Ed.) (2004). Proceedings of the Fifth International Symposium on Flatfish Ecology, Part II. Port Erin, Isle of Man, 3-7 November 2002. Journal of Sea Research, 51(3-4). Elsevier: Amsterdam. 167-338 pp., more
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Non-open access 351687 [ request ]
Keywords
    By catch
    Characteristics > Productivity
    Density dependence
    Management > Resource management > Fishery management
    Population functions > Growth
    Population functions > Recruitment
    Production rate > Productivity
    Productivity
    Properties > Biological properties > Sexual maturity
    Sexual dimorphism
    Pleuronectes platessa Linnaeus, 1758 [WoRMS]
    ANE, North Sea [Marine Regions]
    Marine/Coastal
Author keywords
    North Sea plaice; sexual dimorphism; discarding; density dependence;regime shift; productivity
Authors  Top 
  • Kell, L.T.
  • Bromley, P.J.
Abstract
    Since the early 20th century there have been many descriptions of variability in the growth and sexual maturation of North Sea plaice, both through time and between the sexes. There have also been large changes in plaice abundance and recruitment against a background of increasing fishing pressure and changing environmental conditions. This paper evaluates the importance of sexual dimorphism, trends in growth and recruitment, density-dependent sexual maturation and discarding and considers their implications for current stock assessment and management practice. Density-dependent sexual maturation may be important at low stock levels by providing resilience to stock collapse. The productivity of the stock varied over a time scale of 10-15 years. Discarding of small fish by the fishery can have a substantial influence on the productivity of the stock and bias our perception of both productivity and stock size, and has major implications for the management of North Sea plaice.
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