Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern Pacific
Jumbo squid (Dosidicus gigas) plays an important role in food webs throughout the eastern Pacific; however, its trophic ecology is complex, because it is a highly migratory and opportunistic predator. In this study, δ13C and δ15N values were measured along the lateral wall of lower beak to investiga...
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| Format: | Article |
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Frontiers Media S.A.
2022-04-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.806847/full |
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| author | Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Robert Boenish Zhenfang Zhao Jianhua Li Jianhua Li Jianhua Li Jianhua Li Jianhua Li Xinjun Chen Xinjun Chen Xinjun Chen Xinjun Chen Xinjun Chen |
| author_facet | Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Robert Boenish Zhenfang Zhao Jianhua Li Jianhua Li Jianhua Li Jianhua Li Jianhua Li Xinjun Chen Xinjun Chen Xinjun Chen Xinjun Chen Xinjun Chen |
| author_sort | Guanyu Hu |
| collection | DOAJ |
| description | Jumbo squid (Dosidicus gigas) plays an important role in food webs throughout the eastern Pacific; however, its trophic ecology is complex, because it is a highly migratory and opportunistic predator. In this study, δ13C and δ15N values were measured along the lateral wall of lower beak to investigate the ontogenetic and spatiotemporal feeding strategy shifts of jumbo squid, respectively. Both year and area had significant influences on δ13C (p < 0.01), while sex and stage had no significant influence on δ13C (p > 0.05). All explanatory variables (sex, stage, year, and area) had significant influences on δ15N (p < 0.05). The differences of niche among life stages indicated that the habitat and feeding habit were likely changed with the growth of individuals. Compared with normal years, the habitat of squids might change during the El Niño year. However, during the strong El Niño year, habitat location changed and niche size decreased compared to normal years. The trophic niche of D. gigas differed between different areas. Stable isotopes in early life stages were most effective for distinguishing different geographic populations. Females and males were likely to inhabit similar geographic areas throughout ontogeny. Unexpectedly, we found evidence to suggest females may have larger habitats and wider trophic niche than males. This study revealed the ontogenetic and spatiotemporal plasticity of habitat and feeding strategy of D. gigas. |
| first_indexed | 2024-12-21T04:41:58Z |
| format | Article |
| id | doaj.art-83db0c30c8824f889c27498d6b15f73e |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-21T04:41:58Z |
| publishDate | 2022-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-83db0c30c8824f889c27498d6b15f73e2022-12-21T19:15:40ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452022-04-01910.3389/fmars.2022.806847806847Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern PacificGuanyu Hu0Guanyu Hu1Guanyu Hu2Guanyu Hu3Guanyu Hu4Guanyu Hu5Robert Boenish6Zhenfang Zhao7Jianhua Li8Jianhua Li9Jianhua Li10Jianhua Li11Jianhua Li12Xinjun Chen13Xinjun Chen14Xinjun Chen15Xinjun Chen16Xinjun Chen17State Key Laboratory of Marine Geology, Tongji University, Shanghai, ChinaCollege of Marine Sciences, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai, ChinaNational Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai, ChinaScientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai, ChinaEnvironmental Defense Fund, Boston, MA, United StatesCollege of Marine Sciences, Shanghai Ocean University, Shanghai, ChinaCollege of Marine Sciences, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai, ChinaNational Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai, ChinaScientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai, ChinaCollege of Marine Sciences, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai, ChinaNational Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai, ChinaScientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai, ChinaJumbo squid (Dosidicus gigas) plays an important role in food webs throughout the eastern Pacific; however, its trophic ecology is complex, because it is a highly migratory and opportunistic predator. In this study, δ13C and δ15N values were measured along the lateral wall of lower beak to investigate the ontogenetic and spatiotemporal feeding strategy shifts of jumbo squid, respectively. Both year and area had significant influences on δ13C (p < 0.01), while sex and stage had no significant influence on δ13C (p > 0.05). All explanatory variables (sex, stage, year, and area) had significant influences on δ15N (p < 0.05). The differences of niche among life stages indicated that the habitat and feeding habit were likely changed with the growth of individuals. Compared with normal years, the habitat of squids might change during the El Niño year. However, during the strong El Niño year, habitat location changed and niche size decreased compared to normal years. The trophic niche of D. gigas differed between different areas. Stable isotopes in early life stages were most effective for distinguishing different geographic populations. Females and males were likely to inhabit similar geographic areas throughout ontogeny. Unexpectedly, we found evidence to suggest females may have larger habitats and wider trophic niche than males. This study revealed the ontogenetic and spatiotemporal plasticity of habitat and feeding strategy of D. gigas.https://www.frontiersin.org/articles/10.3389/fmars.2022.806847/fullDosidicus gigasisotopic nichestable isotopeontogenyspatiotemporal changessex |
| spellingShingle | Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Guanyu Hu Robert Boenish Zhenfang Zhao Jianhua Li Jianhua Li Jianhua Li Jianhua Li Jianhua Li Xinjun Chen Xinjun Chen Xinjun Chen Xinjun Chen Xinjun Chen Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern Pacific Frontiers in Marine Science Dosidicus gigas isotopic niche stable isotope ontogeny spatiotemporal changes sex |
| title | Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern Pacific |
| title_full | Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern Pacific |
| title_fullStr | Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern Pacific |
| title_full_unstemmed | Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern Pacific |
| title_short | Ontogenetic and Spatiotemporal Changes in Isotopic Niche of Jumbo Squid (Dosidicus gigas) in the Southeastern Pacific |
| title_sort | ontogenetic and spatiotemporal changes in isotopic niche of jumbo squid dosidicus gigas in the southeastern pacific |
| topic | Dosidicus gigas isotopic niche stable isotope ontogeny spatiotemporal changes sex |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.806847/full |
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