The Dependence of Yearly Recruitment of Japanese Sardine <i>Sardinops melanostictus</i> on Survival in the Kuroshio-Oyashio Transition Region
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- Kasai Akihide
- Department of Fisheries, Faculty of Agriculture, Kyoto University
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- Sugimoto Takashige
- Ocean Research Institute, University of Tokyo
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- Nakata Hideaki
- Ocean Research Institute, University of Tokyo
Bibliographic Information
- Other Title
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- The Dependence of Yearly Recruitment of Japanese Sardine Sardinops melanostictus on Survival in the Kuroshio-Oyashio Transition Region
- Dependence of Yearly Recruitment of Jap
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Abstract
We have numerically modeled the transport and survival processes of Japanese sardine eggs and larvae Sardinops melanostictus in the Kuroshio-Oyashio region to investigate thedependence of yearly recruitment of the sardine on the mortality rate during the early life stages. The model covers from 130°E to 160°E and simulates the Kuroshio Current and wind-induced current resulting from the winter monsoon in a simple way. As a biological process, natural mortality of the eggs and larvae is parameterized by area and year, considering the oceanographic condition such as the extent of southward intrusion of the Oyashio. The year-to-year variations in the amount of survivors simulated by the model are compared to that of one-year sardine stock based on the field data. The variation in the abundance of one-year old sardine is well correlated to that of the surviving juveniles off the east but not the south of Japan, both of which are calculated by the model. This indicates that the survival condition after the postlarval period off the east coast of Japan, which is strongly affected by the Oyashio, could play an important role in determining the year class strength. A strong year class can be formed by the numerous juveniles transported to the east and/or by the good survival condition in the eastern offshore region of Japan.
Journal
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- Fisheries science
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Fisheries science 63 (3), 372-377, 1997
The Japanese Society of Fisheries Science
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Details 詳細情報について
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- CRID
- 1390282679407016832
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- NII Article ID
- 130003903009
- 10004869985
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- NII Book ID
- AA10993718
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- COI
- 1:CAS:528:DyaK2sXjvFait7g%3D
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- NDL BIB ID
- 4231320
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- ISSN
- 09199268
- http://id.crossref.org/issn/09199268
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed