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Please use this identifier to cite or link to this item: http://hdl.handle.net/10793/134

Title: Variability in the assignment of maturity stages of plaice (Pleuronectes platessa L.) and whiting (Merlangius merlangus L.) using macroscopic maturity criteria
Authors: McGrath, D
Gerritsen, H.D.
Keywords: maturity scale
quality assurance
quality control
operator bias
operator error
reproduction
Issue Date: 2006
Publisher: Elsevier
Citation: H.D. Gerritsen, D. McGrath, Variability in the assignment of maturity stages of plaice (Pleuronectes platessa L.) and whiting (Merlangius merlangus L.) using macroscopic maturity criteria, Fisheries Research, Volume 77, Issue 1, January 2006, Pages 72-77.
Series/Report no.: Fisheries Research;77 (1)
Abstract: This study investigates if a macroscopic scale can be applied consistently, by examining the variablity between and within ten people who repeatedly assessed the sex and maturity stages of 80 plaice (Pleuronectes platessa L.) and 79 whiting (Merlangius merlangus L.) gonads. In most cases, agreement within assessors was not significantly higher than agreement between assessors, suggesting that variability was random and not due to differences in interpretation. This finding was supported by the fact that a significant bias was only found for one assessor. Some maturity stages were assigned quite consistently, while other stages were not defined objectively enough to be assigned reliably, even when fish were assessed repeatedly by the same person. For both species, well-defined maturity scales with fewer stages would be prefereable over scales that distinguish a larger number of maturity stages. As maturity staging will always contain a form of subjective judgement, it should be subject to continuous quality control measures.
Description: NOTICE: this is the author’s version of a work that was accepted for publication in Fisheries Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Fisheries Research, [Volume 77, Issue 1 (January 2006)] doi:10.1016/j.fishres.2005.08.007 http://www.sciencedirect.com/science/article/pii/S0165783605002754
peer-reviewed
URI: http://hdl.handle.net/10793/134
http://dx.doi.org/10.1016/j.fishres.2005.08.007
ISSN: 0165-7836
Appears in Collections:Peer Reviewed Scientific Papers

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