Seasonal length:weight relationships of the invertebrate species caught by Fisheries and Oceans Canada Maritimes Region ecosystem surveys from 2001-2017 / by Virginia R. Noble and Donald S. Clark. : Fs97-13/1293E-PDF

"Fisheries and Oceans Canada Maritimes Region has conducted annual ecosystem surveys of the Scotian Shelf, Bay of Fundy and Georges Bank since 1970. These surveys are the primary data source for monitoring trends in fish and invertebrate species distribution, abundance, and biological condition throughout the Maritimes Region. Since 2014, all catch and biological data are entered at sea using the Ecosystem Survey Entry software system, which was developed to aid in the automation of the data entry process. An error message is generated during data entry if the observed weight of a specimen-at-length differs from the predicted weight-at-length by more than 25%. This is intended to reduce data entry errors due to typographic errors, incorrect measurement and/or units used. Invertebrate species Length:Weight Relationships (LWR) are an important tool to aid in data collection quality control at sea. We use regression coefficients, intercept (a) and slope (b), calculated from previous years seasonal surveys to predict the weight from the length of an invertebrate. This report presents the regression coefficients of invertebrate species caught and measured during 2001-2017 in the Maritimes Region"--Abstract, page iv.

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