Wei, Lian and Yu, Yong and Xu, Bo and Gao, Zhiwei and Ding, Haitao (2025) Otolith chemistry indicates the distinct spawning grounds and regional connectivity of Pagothenia borchgrevinki between the Antarctic Peninsula and Prydz Bay, Antarctica. Advances in Polar Science, 36 (4). pp. 392-404.
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Abstract
Samples for this study were collected from Geologists Island and Prydz Bay in different seasons. Otolith sections were analyzed for elemental composition in the nucleus, juvenile, and edge areas. Elements including Mg, Sr, P, K, Fe, and Zn, normalized to calcium (CMe/CCa), were selected for analysis. To explore population structure, we studied factors influencing population dynamics during life stage, and regional distribution characteristics. For identified individual origins and explored the distribution and migration between regions and migration from hatching to adulthood provide a basis. So as to understand the distribution and migration pattern of Pagothenia borchgrevinki across various life history stages. Results indicated a consistent P. borchgrevinki population spawning across various regions of Southern Ocean, with eggs distributed at the bottom. Coastal slope topography changes and water compensation facilitated egg transportation from the bottom to under sea ice during hatching to juvenile stages. Long-distance migration was facilitated by the Antarctic Circumpolar Current and regional currents during development to adulthood. Multiple spawning grounds and ocean currents contributed to diverse distribution environments during the hatching period. Differences in individual development were important factors during the juvenile period, while ocean currents and autonomous behaviors influenced regional transportation patterns in the post development stages. Therefore, the research holds that differences in distribution environment and behavior during each period led to distinct factors influencing CMe/CCa variations.
| Item Type: | Article |
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| Keywords: | otolith chemistry, period characteristics, Pagothenia borchgrevinki, life history connectivity, Antarctic Peninsula, Prydz Bay |
| Subjects: | Natural Environment > Oceans Natural Environment > Terrestrial Peoples, Cultures and Societies > Media |
| Organizations: | Advances in Polar Science (APS) |
| Date Deposited: | 24 Apr 2026 09:01 |
| URI: | https://library.arcticportal.org/id/eprint/2955 |
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