%0 Journal Article
%T Correction of ˇ°Case Study: A Simulation Model of the Spawning Stock Biomass of Pacific Bluefin Tuna and Evaluation of Fisheriesˇ±
%A Kazumi Sakuramoto
%J Open Access Library Journal
%V 4
%N 4
%P 1-7
%@ 2333-9721
%D 2017
%I Open Access Library
%R 10.4236/oalib.1103575
%X <div style="text-align:justify;">
	<span style="line-height:1.5;">One error was found in the
coding of the simulation program for reproducing the recruitment
(</span><i style="line-height:1.5;">R</i><span style="line-height:1.5;">) and spawning stock biomass (</span><i style="line-height:1.5;">SSB</i><span style="line-height:1.5;">) of Pacific bluefin tuna. As a result of this error, the
maturity rates for ages 3 and 4 were found to be much lower in the simulation than the true values. The aim of this paper is to
show the results when the error is corrected. The </span><i style="line-height:1.5;">R</i><span style="line-height:1.5;"> and </span><i style="line-height:1.5;">SSB</i><span style="line-height:1.5;"> were under-estimated in response to the error. As a result, the natural mortality
coefficients (</span><i style="line-height:1.5;">M</i><span style="line-height:1.5;">) in the
previous paper were assumed to be smaller so that the reproduced </span><i style="line-height:1.5;">R</i><span style="line-height:1.5;"> and </span><i style="line-height:1.5;">SSB</i><span style="line-height:1.5;"> would coincide with those observed. When the error was
corrected, it was not necessary to assume the value of </span><i style="line-height:1.5;">M</i><span style="line-height:1.5;"> to be smaller. When the corrected progam and the original </span><i style="line-height:1.5;">M</i><span style="line-height:1.5;"> values were used, the </span><i style="line-height:1.5;">R</i><span style="line-height:1.5;"> and </span><i style="line-height:1.5;">SSB</i><span style="line-height:1.5;"> reproduced in the simulation coincided well with </span><span style="line-height:1.5;">those shown in
the previous paper.</span>
</div>
%K Bluefin Tuna
%K Stock-Recruitment Relationship
%K Environmental Factors
%U http://www.oalib.com/paper/5285168