Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea
A recent population hypothesis for Antarctic silverfish (Pleuragramma antarctica), a critical forage species, argued that interactions between life history and circulation associated with glacial trough systems drive circumpolar distributions over the continental shelf. In the Ross Sea, aggregations...
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Blackwell Publishing Ltd
2018
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Online Access: | http://hdl.handle.net/11577/3277679 https://doi.org/10.1111/fog.12251 http://www.interscience.wiley.com/jpages/1054-6006 |
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ftunivpadovairis:oai:www.research.unipd.it:11577/3277679 2024-04-21T07:45:21+00:00 Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea Brooks, Cassandra M. Caccavo, Jilda Alicia Ashford, Julian Dunbar, Robert Goetz, Kimberly La Mesa, Mario Zane, Lorenzo Brooks, Cassandra M. Caccavo, Jilda Alicia Ashford, Julian Dunbar, Robert Goetz, Kimberly La Mesa, Mario Zane, Lorenzo 2018 STAMPA http://hdl.handle.net/11577/3277679 https://doi.org/10.1111/fog.12251 http://www.interscience.wiley.com/jpages/1054-6006 eng eng Blackwell Publishing Ltd info:eu-repo/semantics/altIdentifier/wos/WOS:000428400500008 volume:27 issue:3 firstpage:274 lastpage:287 numberofpages:14 journal:FISHERIES OCEANOGRAPHY http://hdl.handle.net/11577/3277679 doi:10.1111/fog.12251 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85041069265 http://www.interscience.wiley.com/jpages/1054-6006 Antarctic silverfish Circumpolar Deep Water glacial trough system large-scale circulation life history connectivity physical-biological interaction population structure Ross Sea Oceanography Aquatic Science info:eu-repo/semantics/article 2018 ftunivpadovairis https://doi.org/10.1111/fog.12251 2024-03-28T02:01:49Z A recent population hypothesis for Antarctic silverfish (Pleuragramma antarctica), a critical forage species, argued that interactions between life history and circulation associated with glacial trough systems drive circumpolar distributions over the continental shelf. In the Ross Sea, aggregations of eggs and larvae occur under fast ice in Terra Nova Bay, and the hypothesis predicted that dispersing larvae encounter outflow along the western side of Drygalski Trough. The outflow advects larvae towards the shelf-break, and mixing with trough inflow facilitates return toward the inner shelf. To examine the hypothesis, we compared samples of P. antarctica collected near Coulman Island in the outflow, along Crary Bank in the inflow, and a third set taken over the rest of the Ross Sea. We ruled out misidentification using an innovative genetic validation. Silverfish larvae comprised 99.5% of the catch, and the highest population densities were found in Drygalski Trough. The results provided no evidence to reject the population hypothesis. Abundance indices, back-calculated hatching dates, length distributions and growth were congruent with a unified early life history in the western Ross Sea, constrained by cryopelagic early stages in Terra Nova Bay. By contrast, a sample in the Bay of Whales revealed much smaller larvae, suggesting either a geographically separate population in the eastern Ross Sea, or westward connectivity with larvae spawned nearby by fish sourced from troughs upstream in the Amundsen Sea. These results illustrate how hypotheses that integrate population structure with life history can provide precise spatial predictions for subsequent testing. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic silverfish Antarctica Coulman Island Ross Sea Padua Research Archive (IRIS - Università degli Studi di Padova) Fisheries Oceanography 27 3 274 287 |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
Antarctic silverfish Circumpolar Deep Water glacial trough system large-scale circulation life history connectivity physical-biological interaction population structure Ross Sea Oceanography Aquatic Science |
spellingShingle |
Antarctic silverfish Circumpolar Deep Water glacial trough system large-scale circulation life history connectivity physical-biological interaction population structure Ross Sea Oceanography Aquatic Science Brooks, Cassandra M. Caccavo, Jilda Alicia Ashford, Julian Dunbar, Robert Goetz, Kimberly La Mesa, Mario Zane, Lorenzo Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea |
topic_facet |
Antarctic silverfish Circumpolar Deep Water glacial trough system large-scale circulation life history connectivity physical-biological interaction population structure Ross Sea Oceanography Aquatic Science |
description |
A recent population hypothesis for Antarctic silverfish (Pleuragramma antarctica), a critical forage species, argued that interactions between life history and circulation associated with glacial trough systems drive circumpolar distributions over the continental shelf. In the Ross Sea, aggregations of eggs and larvae occur under fast ice in Terra Nova Bay, and the hypothesis predicted that dispersing larvae encounter outflow along the western side of Drygalski Trough. The outflow advects larvae towards the shelf-break, and mixing with trough inflow facilitates return toward the inner shelf. To examine the hypothesis, we compared samples of P. antarctica collected near Coulman Island in the outflow, along Crary Bank in the inflow, and a third set taken over the rest of the Ross Sea. We ruled out misidentification using an innovative genetic validation. Silverfish larvae comprised 99.5% of the catch, and the highest population densities were found in Drygalski Trough. The results provided no evidence to reject the population hypothesis. Abundance indices, back-calculated hatching dates, length distributions and growth were congruent with a unified early life history in the western Ross Sea, constrained by cryopelagic early stages in Terra Nova Bay. By contrast, a sample in the Bay of Whales revealed much smaller larvae, suggesting either a geographically separate population in the eastern Ross Sea, or westward connectivity with larvae spawned nearby by fish sourced from troughs upstream in the Amundsen Sea. These results illustrate how hypotheses that integrate population structure with life history can provide precise spatial predictions for subsequent testing. |
author2 |
Brooks, Cassandra M. Caccavo, Jilda Alicia Ashford, Julian Dunbar, Robert Goetz, Kimberly La Mesa, Mario Zane, Lorenzo |
format |
Article in Journal/Newspaper |
author |
Brooks, Cassandra M. Caccavo, Jilda Alicia Ashford, Julian Dunbar, Robert Goetz, Kimberly La Mesa, Mario Zane, Lorenzo |
author_facet |
Brooks, Cassandra M. Caccavo, Jilda Alicia Ashford, Julian Dunbar, Robert Goetz, Kimberly La Mesa, Mario Zane, Lorenzo |
author_sort |
Brooks, Cassandra M. |
title |
Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea |
title_short |
Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea |
title_full |
Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea |
title_fullStr |
Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea |
title_full_unstemmed |
Early life history connectivity of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea |
title_sort |
early life history connectivity of antarctic silverfish (pleuragramma antarctica) in the ross sea |
publisher |
Blackwell Publishing Ltd |
publishDate |
2018 |
url |
http://hdl.handle.net/11577/3277679 https://doi.org/10.1111/fog.12251 http://www.interscience.wiley.com/jpages/1054-6006 |
genre |
Amundsen Sea Antarc* Antarctic Antarctic silverfish Antarctica Coulman Island Ross Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic silverfish Antarctica Coulman Island Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000428400500008 volume:27 issue:3 firstpage:274 lastpage:287 numberofpages:14 journal:FISHERIES OCEANOGRAPHY http://hdl.handle.net/11577/3277679 doi:10.1111/fog.12251 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85041069265 http://www.interscience.wiley.com/jpages/1054-6006 |
op_doi |
https://doi.org/10.1111/fog.12251 |
container_title |
Fisheries Oceanography |
container_volume |
27 |
container_issue |
3 |
container_start_page |
274 |
op_container_end_page |
287 |
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1796939178847502336 |