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After acquiring the data from one of the previously discussed
methods you can easily perform back-calculated length in the
window to the right. To begin you need to decide what
y-intercept value you wish to use for the Frasier-Lee Method of
back-calculated lengths. We have preloaded several
y-intercept values for you to choose from for a variety of fish
species. We have also included a list of several
structures that you might be using for your age and growth
study. By default the "preferred" y-intercept value will
be selected based on the unit of measurements, species, and hard
part you choose. If you find our pre-loaded values do not
match the values you need to use, you can either manually type
in your value or change the list of y-intercept values that are
loaded. You can also add to the list of available species
and hard parts. This is done through a dialog interface
where you can navigate through the records we have pre-loaded,
change the values, or add new one. |
Back-Calculations Window
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After you have set your y-intercepts simply complete the
remaining options in the top third of the window. To
finish off you will need to select what tables you want to be
calculated. This is set up in a tree where you can click
the top box next to "Output Tables" and all tables will be
created. If you only want a few of the tables calculated
just un-check the box next to the title. The available
summary tables include:
Back-Calculation Tables:
- Individual
back-calculated lengths
- Length at capture
- Average
back-calculated lengths for each age class
- Standard error of
average back-calculated lengths for each age class
- Average annuli
increments of back-calculated lengths for each age class
- Standard error of
average annual increments of back-calculated lengths for
each age class
- Average length
increments until capture during (year) (season)
- Average annular
increments of bony parts
- Standard deviation
of bony part increment
- Individual length
at last annulus
- Length at last
annulus analysis
Regression Tables:
- Body (Y) Scale (X)
regression
- ANOVA
- Geometric mean
functional regression
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The output window is similar to other spreadsheet applications.
Each table is separated by tabs which are found at the bottom of
the screen. By clicking on the different tabs you can
navigate to the different summary tables. From here you
can either save your output as a .bcl file read only by FishBC
3.0, print the data, copy/paste the data to your reports, or
export all sheets to ExcelŽ. |
Back-Calculations Output Window
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