Distribution and growth rates of Japanese jack mackerel <i>Trachurus japonicus</i> larvae relative to oceanographic conditions in the northern Satsunan area, southern Japan
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- Kume Gen
- Faculty of Fisheries, Kagoshima University
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- Nakaya Kei
- Faculty of Fisheries, Kagoshima University
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- Takeda Tsutomu
- Faculty of Fisheries, Kagoshima University
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- Ichinomiya Mutsuo
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
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- Komorita Tomohiro
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
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- Habano Akimasa
- Faculty of Fisheries, Kagoshima University
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- Makino Fumihiro
- Faculty of Fisheries, Kagoshima University
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- Kodama Masafumi
- Faculty of Fisheries, Kagoshima University
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- Kobari Toru
- Faculty of Fisheries, Kagoshima University
Bibliographic Information
- Other Title
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- Distribution and growth rates of Japanese jack mackerel Trachurus japonicus larvae relative to oceanographic conditions in the northern Satsunan area, southern Japan
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Description
<p>The northern Satsunan area, comprising the mouth of Kagoshima Bay and Osumi Strait, is an important spawning and nursery ground for Japanese jack mackerel Trachurus japonicus in Japan. Upwellings frequently occur at the mouth of the bay during winter and spring, and the consequent nutrient supply promotes phytoplankton blooms. This study examined how T. japonicus utilizes upwelling (Kagoshima Bay) and non-upwelling areas (Osumi Strait) as larval nursery grounds. Densities and growth rates (measured as the average width of the last three otolith increments) of T. japonicus larvae in both areas were compared to determine the upwelling influence on nursery ground formation. The mouth of the bay had lower temperature and salinity but higher chlorophyll-a concentrations and prey density than that of the strait. Densities of larvae were consistently higher in the bay than in the strait, indicating that the main nursery of T. japonicus is formed in Kagoshima Bay. No significant differences were observed in the growth rates of larvae among areas, suggesting that lower temperatures and prey availability are growth limiting factors in the mouth of the bay and the strait, respectively, and the Osumi Strait could also provide a favorable nursery area.</p>
Journal
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- Plankton and Benthos Research
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Plankton and Benthos Research 18 (3), 148-159, 2023-08-31
The Plankton Society of Japan, The Japanese Association of Benthology
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Details 詳細情報について
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- CRID
- 1390860243976863104
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- NII Book ID
- AA12130745
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- ISSN
- 1882627X
- 18808247
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- NDL BIB ID
- 033038451
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
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- Abstract License Flag
- Disallowed