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Measurement error in shovelnose sturgeon: evidence from field observation and controlled experiment data

, , , , , & show all
Pages 133-138 | Received 08 Feb 2012, Accepted 12 May 2012, Published online: 01 Aug 2012

Figures & data

Figure 1. Field results of shovelnose sturgeon growth in millimeters (calculated as fork length of second measurement subtracted from fork length at initial measurement) plotted with number of days between initial mark and recapture.

Figure 1. Field results of shovelnose sturgeon growth in millimeters (calculated as fork length of second measurement subtracted from fork length at initial measurement) plotted with number of days between initial mark and recapture.

Figure 2. Experimental results of shovelnose sturgeon growth in millimeters (calculated as fork length of second measurement subtracted from fork length at initial measurement) plotted with individual fish identification number. Notes: Dotted line represents perfect agreement (i.e., 1:1) if there were no differences between second fork length measurement and initial fork length measurement. Slope test was used to evaluate whether the slope was different from zero. The number of observations is n. Note an exceedingly high value (+496 mm) and an extremely low value (−100 mm) were present within this data set.

Figure 2. Experimental results of shovelnose sturgeon growth in millimeters (calculated as fork length of second measurement subtracted from fork length at initial measurement) plotted with individual fish identification number. Notes: Dotted line represents perfect agreement (i.e., 1:1) if there were no differences between second fork length measurement and initial fork length measurement. Slope test was used to evaluate whether the slope was different from zero. The number of observations is n. Note an exceedingly high value (+496 mm) and an extremely low value (−100 mm) were present within this data set.

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