synLFQ4

Synthetic length-frequency data as generated by the function
<code>lfqGen</code> from the fishdynr package (Taylor 2016). Can be used by
<code>ELEFAN</code> or <code>ELEFAN_SA</code>.
The data is generated with the following von Bertalanffy growth parameters:<ul>
<li>K = 0.5</li>
<li>Linf = 80</li>
<li>C = 0.75</li>
<li>ts = 0.5</li>
<li>t_anchor = 0.25 (Time when yearly recruitment pulse occurs;
 e.g. 0 = Jan 1, 0.25 = Apr 1, 0.5 = Jul 1st, 0.75 = Oct 1)</li>
</ul>Further settings include:<ul>
<li>Linf.cv = 0.05</li>
<li>K.cv = 0.05</li>
<li>L50 = 20 (length at 50% prob. of capture via trawl net)</li>
<li>wqs = 0 (width between 25% and 75% prob. of capture quantiles;
 i.e. wqs = 0 is knife-edge selection)</li>
<li>M = 0.5 (Natural mortality rate)</li>
<li>harvest_rate = 0.5 (Fishing mortality rate)</li>
</ul>

data

dataset

length-frequency

A compilation of fish stock assessment methods for the
analysis of length-frequency data in the context of data-poor
fisheries. Includes methods and examples included in the FAO
Manual by P. Sparre and S.C. Venema (1998), "Introduction to tropical fish
stock assessment" (<https://www.fao.org/documents/card/en/c/9bb12a06-2f05-5dcb-a6ca-2d6dd3080f65/>),
as well as other more recent methods.

Tobias K Mildenberger

TropFishR

Tropical Fisheries Analysis

synLFQ4 function

A list of class lfq consisting of:<ul>
<li>dates dates of sampling times (class Date),</li>
<li>midLengths midpoints of the length classes,</li>
<li>catch matrix with catches/counts per length class (row) and sampling date (column).</li>
</ul>

Format

Synthetic length-frequency data as generated by the function
<code>lfqGen</code> from the fishdynr package (Taylor 2016). Can be used by
<code>ELEFAN</code> or <code>ELEFAN_SA</code>.
The data is generated with the following von Bertalanffy growth parameters:<ul>
<li>K = 0.5</li>
<li>Linf = 80</li>
<li>C = 0.75</li>
<li>ts = 0.5</li>
<li>t_anchor = 0.25 (Time when yearly recruitment pulse occurs;
 e.g. 0 = Jan 1, 0.25 = Apr 1, 0.5 = Jul 1st, 0.75 = Oct 1)</li>
</ul>

Further settings include:<ul>
<li>Linf.cv = 0.05</li>
<li>K.cv = 0.05</li>
<li>L50 = 20 (length at 50% prob. of capture via trawl net)</li>
<li>wqs = 0 (width between 25% and 75% prob. of capture quantiles;
 i.e. wqs = 0 is knife-edge selection)</li>
<li>M = 0.5 (Natural mortality rate)</li>
<li>harvest_rate = 0.5 (Fishing mortality rate)</li>
</ul>

synLFQ4: Synthetic length-frequency data IV (with seasonal oscillation)

Description

Usage

Arguments

Format

Examples