Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions
To study the influence of different ocean currents on the trophic spectra found in a sympatric fish community, we analyzed the radiocarbon contents (Δ14C) and stable carbon (δ13C) and nitrogen (δ15N) isotopic compositions in their bulk muscle tissues and the δ15N of individual amino acids in 26 spec...
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| Format: | Article |
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Frontiers Media S.A.
2021-05-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2021.641282/full |
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| author | Naoto F. Ishikawa Nanako O. Ogawa Yoshito Chikaraishi Yoshito Chikaraishi Moto-omi Yamaguchi Katsunori Fujikura Yosuke Miyairi Yusuke Yokoyama Yusuke Yokoyama Toshi Nagata Naohiko Ohkouchi |
| author_facet | Naoto F. Ishikawa Nanako O. Ogawa Yoshito Chikaraishi Yoshito Chikaraishi Moto-omi Yamaguchi Katsunori Fujikura Yosuke Miyairi Yusuke Yokoyama Yusuke Yokoyama Toshi Nagata Naohiko Ohkouchi |
| author_sort | Naoto F. Ishikawa |
| collection | DOAJ |
| description | To study the influence of different ocean currents on the trophic spectra found in a sympatric fish community, we analyzed the radiocarbon contents (Δ14C) and stable carbon (δ13C) and nitrogen (δ15N) isotopic compositions in their bulk muscle tissues and the δ15N of individual amino acids in 26 species of demersal fish collected from off Tohoku (Pacific coast), northeastern Japan. The Δ14C values of the fish varied from –42 to +41‰, consistent with the Δ14C of the dissolved inorganic carbon in the cold Oyashio Current (typically about –50‰) and the warm Kuroshio Current (typically about +50‰). The trophic positions (TPs) of the fish estimated from the δ15N values of amino acids increased from 3.1 to 4.5 with increasing snout length. A negative correlation was observed between Δ14C and TP in gadiform fish and flatfish, suggesting that the Oyashio Current delivers a high TP diet to these fish groups. These results suggest that the trophic ecology of marine fish in the coastal western North Pacific is primarily controlled by the two major surface water currents, but is also significantly influenced by a combination of species-specific feeding and migration strategies. |
| first_indexed | 2024-12-16T10:11:45Z |
| format | Article |
| id | doaj.art-a03284ced18a48c285ebf1cde1e9e26a |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-16T10:11:45Z |
| publishDate | 2021-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-a03284ced18a48c285ebf1cde1e9e26a2022-12-21T22:35:34ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452021-05-01810.3389/fmars.2021.641282641282Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic CompositionsNaoto F. Ishikawa0Nanako O. Ogawa1Yoshito Chikaraishi2Yoshito Chikaraishi3Moto-omi Yamaguchi4Katsunori Fujikura5Yosuke Miyairi6Yusuke Yokoyama7Yusuke Yokoyama8Toshi Nagata9Naohiko Ohkouchi10Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, JapanBiogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, JapanBiogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, JapanInstitute of Low Temperature Science, Hokkaido University, Sapporo, JapanMarine Biodiversity and Environmental Assessment Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, JapanMarine Biodiversity and Environmental Assessment Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, JapanAtmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, JapanBiogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, JapanAtmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, JapanAtmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, JapanBiogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, JapanTo study the influence of different ocean currents on the trophic spectra found in a sympatric fish community, we analyzed the radiocarbon contents (Δ14C) and stable carbon (δ13C) and nitrogen (δ15N) isotopic compositions in their bulk muscle tissues and the δ15N of individual amino acids in 26 species of demersal fish collected from off Tohoku (Pacific coast), northeastern Japan. The Δ14C values of the fish varied from –42 to +41‰, consistent with the Δ14C of the dissolved inorganic carbon in the cold Oyashio Current (typically about –50‰) and the warm Kuroshio Current (typically about +50‰). The trophic positions (TPs) of the fish estimated from the δ15N values of amino acids increased from 3.1 to 4.5 with increasing snout length. A negative correlation was observed between Δ14C and TP in gadiform fish and flatfish, suggesting that the Oyashio Current delivers a high TP diet to these fish groups. These results suggest that the trophic ecology of marine fish in the coastal western North Pacific is primarily controlled by the two major surface water currents, but is also significantly influenced by a combination of species-specific feeding and migration strategies.https://www.frontiersin.org/articles/10.3389/fmars.2021.641282/fulldeep seademersal fishoff SanrikuOyashio–Kuroshio transitiontrophic positionmigration |
| spellingShingle | Naoto F. Ishikawa Nanako O. Ogawa Yoshito Chikaraishi Yoshito Chikaraishi Moto-omi Yamaguchi Katsunori Fujikura Yosuke Miyairi Yusuke Yokoyama Yusuke Yokoyama Toshi Nagata Naohiko Ohkouchi Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions Frontiers in Marine Science deep sea demersal fish off Sanriku Oyashio–Kuroshio transition trophic position migration |
| title | Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions |
| title_full | Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions |
| title_fullStr | Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions |
| title_full_unstemmed | Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions |
| title_short | Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions |
| title_sort | influences of ocean currents on the diets of demersal fish communities in the western north pacific revealed by their muscle carbon and nitrogen isotopic compositions |
| topic | deep sea demersal fish off Sanriku Oyashio–Kuroshio transition trophic position migration |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2021.641282/full |
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