Correction of “A Recruitment Forecasting Model for the Pacific Stock of the Japanese Sardine (Sardinops melanostictus) That Does Not Assume Density-Dependent Effects” - Open Access Library Journal

OALibJ > Vol.4 No.5, May 2017

Correction of “A Recruitment Forecasting Model for the Pacific Stock of the Japanese Sardine (Sardinops melanostictus) That Does Not Assume Density-Dependent Effects” ()

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DOI: 10.4236/oalib.1103620 787 Downloads 1,238 Views

Author(s)

Kazumi Sakuramoto

Affiliation(s)

Department of Ocean Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan.

ABSTRACT

One error was found in the coding of the simulation program for reproducing the recruitment (R) and spawning stock biomass (SSB) of the Pacific stock of the Japanese sardine. As a result of this error, the maturity rate for age 1 in the simulation was found to be half of the value cited from the literature. The aim of this paper is to show the results when the error is corrected. When the error was corrected, the reproduced R and SSB were slightly higher than the values shown in the previous paper. When the fishing mortality coeffcients (F) before 2003 and after 2004 were assumed to be 10% higher and 50% lower than the values cited, respectively, the results coincided better with R and SSB cited. The only difference between the simulation conducted in this paper and that conducted in the previous paper is the assumption that the value of F before 2003 was 10% higher than the values cited. Therefore, the effect of the error was not serious, and the essential conclusions noted in the previous paper did not change.

KEYWORDS

Pacific Stock of Japanese Sardine, Stock-Recruitment Relationship, Environmental Factors, Arctic Oscillation

Share and Cite:

Sakuramoto, K. (2017) Correction of “A Recruitment Forecasting Model for the Pacific Stock of the Japanese Sardine (Sardinops melanostictus) That Does Not Assume Density-Dependent Effects”. Open Access Library Journal, 4, 1-7. doi: 10.4236/oalib.1103620.

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