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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on June 26, 2009
ICES Journal of Marine Science: Journal du Conseil 2009 66(9):1972-1977; doi:10.1093/icesjms/fsp177
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© 2009 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Variability in the relationship between sea scallop shell height and meat weight

Brian J. Rothschild, Charles F. Adams, Christopher L. Sarro and Kevin D. E. Stokesbury

Department of Fisheries Oceanography, School for Marine Science and Technology, University of Massachusetts Dartmouth, 706 South Rodney French Boulevard, New Bedford, MA 02744-1221, USA

Correspondence to B. J. Rothschild: tel: +1 508 910 6382; fax: +1 508 910 6331; e-mail brothschild{at}umassd.edu

Rothschild, B. J., Adams, C. F., Sarro, C. L., and Stokesbury, K. D. E. 2009. Variability in the relationship between sea scallop shell height and meat weight. – ICES Journal of Marine Science, 66: 1972–1977.

We investigated the spatial and temporal variability in the relationship between shell height and meat weight (SHMW) of the sea scallop (Placopecten magellanicus) from Georges Bank (GB) and the mid-Atlantic. Data for the study were collected collaboratively during normal commercial fishing operations. A one-way random-effects ANOVA revealed that 19–44% of the variance in MW was at the batch level. A linear mixed-effects model was used to explain the variability in SHMW regression equations across batches. There was a significant effect of month and year on the SHMW relationship for GB from June through December, and a significant effect of area and year on the SHMW relationship for the mid-Atlantic from January through May. The SHMW relationships presented reflect those of the fishery year-round rather than an estimate of the biological population at a specific point in time. Failure to include intra-annual, interannual, and regional variations in the SHMW could result in continually over- or underestimating the allowable catch in areas open to fishing for short periods. The techniques used are applicable to length–weight studies in general.

Keywords: linear mixed-effects model, meat weight, Placopecten magellanicus, sea scallop, shell height

Received 7 July 2008; accepted 28 May 2009; advance access publication 26 June 2009.


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