twelver

Exhaustive recorded operational activity of the Anguilla japonica sport
fishery in Taiwan during the 1983-1984 season.

datasets

Based on fishery Catch Dynamics instead of fish Population Dynamics (hence CatDyn) and using high-frequency or medium-frequency catch in biomass or numbers, fishing nominal effort, and mean fish body weight by time step, from one or two fishing fleets, estimate stock abundance, natural mortality rate, and fishing operational parameters. It includes methods for data organization, plotting standard exploratory and analytical plots, predictions, for 100 types of models of increasing complexity, and 72 likelihood models for the data.

Ruben Roa-Ureta

CatDyn

Fishery Stock Assessment by Catch Dynamics Models

twelver function

A data frame with 110 observations on the following 4 variables.<dl class="dl-horizontal">
 <dt><code>Date</code></dt><dd>a Date</dd>
 <dt><code>Effort.Hour.Soak</code></dt><dd>a numeric vector</dd>
 <dt><code>Catch.Ind</code></dt><dd>a numeric vector</dd>
 <dt><code>Mbw</code></dt><dd>a numeric vector</dd>
 </dl>

Format

Sport Fishing for Eel Juveniles in Taiwan — twelver

A data frame with 110 observations on the following 4 variables.<dl class='dl-horizontal'>
 <dt><code>Date</code></dt><dd>a Date</dd>
 <dt><code>Effort.Hour.Soak</code></dt><dd>a numeric vector</dd>
 <dt><code>Catch.Ind</code></dt><dd>a numeric vector</dd>
 <dt><code>Mbw</code></dt><dd>a numeric vector</dd>
 </dl>

twelver: Sport Fishing for Eel Juveniles in Taiwan

Description

Usage

Arguments

Format

References

Examples