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, more
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
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| 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 |
| 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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