Caccavo, Jilda Alicia and Ashford, Julian R. and Ryan, Svenja and Papetti, Chiara and Schröder, Michael and Zane, Lorenzo (2020) Data from: Spatial structuring and life history connectivity of Antarctic silverfish along the southern continental shelf of the Weddell Sea. [Data Collection]
Collection description
A multidisciplinary approach was employed to examine a physical-biological population hypothesis for a critical forage species, the Antarctic silverfish (Pleuragramma antarctica). A previous study had shown strong gene flow along the westward Antarctic Slope Current, in addition to spatially recurring length modes that provided evidence for episodic connectivity. In this paper, otolith nucleus chemistry from a subset of fish collected in the southern Weddell Sea as part of a hydrographic survey of the Filchner Trough system was used to test between connectivity scenarios. Nucleus chemistry, which reflects environmental exposure during early life, showed significant spatial structuring despite homogeneity in microsatellite allele frequencies. Mg×Ca-1 and Sr×Ca-1 differentiated length modes, and Mg×Ca-1 showed significant contrasts between Atka Bay, Halley Bay, and Filchner Trough. Physical-biological mechanisms may help reconcile structuring shown by otolith chemistry, length, and abundance data with prior evidence of gene flow. Such mechanisms include self-recruitment shaped by circulation associated with the Filchner Trough, fluctuations in mixing between immigrant and locally-recruited fish, and feeding opportunities between inflowing Modified Warm Deep Water and outflowing Ice Shelf Water. The results illustrate how comparisons between multi-disciplinary techniques based on integrated sampling designs that incorporate hydrography can enhance understanding of population structure and connectivity around the Southern Ocean.
| DOI: |  10.5061/dryad.h44j0zpgs |
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| Keywords: | Pleuragramma antarctica, Antarctic fish, otolith chemistry, biophysical interaction, life-history connectivity | |||||||||||||||||||||
| Subjects: | Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Microbial ecology and evolution Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Marine biology and ecology Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Biodiversity, conservation biology, conservation genetics Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Evolutionary ecology Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Evolutionary genetics Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Macroevolution and paleobiology Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Coevolution, biological mechanisms and ecology of species interactions (e.g. symbiosis, parasitism, mutualism, food-webs) |
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| Department: | Departments > Dipartimento di Biologia (DiBio) | |||||||||||||||||||||
| Depositing User: | Research Data Unipd | |||||||||||||||||||||
| Date Deposited: | 17 Oct 2023 13:57 | |||||||||||||||||||||
| Last Modified: | 17 Oct 2023 13:57 | |||||||||||||||||||||
| Creators/Authors: |
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| Type of data: | Text | |||||||||||||||||||||
| Research funder: | Alexander von Humboldt-Stiftung, Fondazione Cassa di Risparmio di Padova e Rovigo, Antarctic Science International (ASI), Scientific Committee on Antarctic Research, Erasmus+, National Program for Antarctic Research (PNRA), National Science Foundation, University of Padua, Marie Curie | |||||||||||||||||||||
| Grant number: | BIRD164793/16 | |||||||||||||||||||||
| Collection period: |
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| Geographic coverage: | Antarctic Ocean, Weddell Sea | |||||||||||||||||||||
| Resource language: | en | |||||||||||||||||||||
| Metadata language: | en | |||||||||||||||||||||
| Additional information: | Usage notes 1_LAICPMS_data.xlsx Spreadsheet with the metadata associated with samples analyzed for trace element levels using LA-ICP-MS containing the following sheets: Cover sheet explains the column headings in the subsequent sheets. Raw Data sheet compiles the raw data produced from the LA-ICP-MS (which can be accessed in the .txt files also available in this data publication), including intensity data (AVG and STD in counts per second [cps], as well as % RSD, the average Mass Offset) for all elements analyzed. Intensity Data sheet includes just the average intensity data (Intensity AVG from the Raw Data sheet) for each element analyzed, as well as associated metadata. All other .txt files These are the text file outputs from the LA-ICP-MS, containing the raw data for each blank, standard, line (otolith edge), and raster (otolith nucleus) reading. These raw data are compiled in the Raw Data sheet of the 1_LAICPMS_data.xlsx file included in this data publication, however, for certain downstream analysis programs, these raw text files are needed. | |||||||||||||||||||||
| Publisher: | Dryad | |||||||||||||||||||||
| Status: | Published | |||||||||||||||||||||
| Original publication URL: | https://doi.org/10.5061/dryad.h44j0zpgs | |||||||||||||||||||||
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| Date: | 26 May 2020 | |||||||||||||||||||||
| Date type: | Publication | |||||||||||||||||||||
| Copyright holders: | The Authors | |||||||||||||||||||||
| URI: | https://researchdata.cab.unipd.it/id/eprint/1016 |
orcid.org/0000-0002-8172-7855
