Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica
Although Thysanoessa macrura is one of the most abundant and widely distributed euphausiid species in the Southern Ocean, knowledge about its seasonal distribution and overwintering strategy remains sparse. We describe the variation in abundance, demography, and distribution of T. macrura during 3 s...
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ftopenagrar:oai:www.openagrar.de:timport_mods_00013793 2024-09-15T17:44:27+00:00 Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica Haraldsson, Matilda Siegel, Volker 2014 13 https://doi.org/10.3354/meps10553 https://www.openagrar.de/receive/timport_mods_00013793 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013793/dn053144.pdf eng eng Marine ecology progress series -- Mar Ecol Prog Ser MEPS -- 1616-1599 -- 0171-8630 -- 2022265-8 -- 800780-9 https://doi.org/10.3354/meps10553 https://www.openagrar.de/receive/timport_mods_00013793 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013793/dn053144.pdf only signed in user info:eu-repo/semantics/restrictedAccess article Text euphausiid seasonality demography seasonal vertical migration overwintering Southern Ocean article Text doc-type:article 2014 ftopenagrar https://doi.org/10.3354/meps10553 2024-07-08T23:56:24Z Although Thysanoessa macrura is one of the most abundant and widely distributed euphausiid species in the Southern Ocean, knowledge about its seasonal distribution and overwintering strategy remains sparse. We describe the variation in abundance, demography, and distribution of T. macrura during 3 seasons in the Lazarev Sea, located in the south-east Atlantic sector of Antarctica. Adult and larval T. macrura were widely distributed across the Lazarev Sea in all seasons, but with large seasonal variability in the adult population. Mean summer densities (4.9 and 7.0 ind. m-2 in 2005/06 and 2007/08, respectively) were 20-fold higher than densities recorded during autumn (0.4 ind. m-2) and winter (0.2 ind. m-2). Comparison of length-frequency distributions and sex ratios, particularly between shallow (0-200 m) and deep (0-2000 m) samples taken during winter, suggest a seasonal vertical migration. A large proportion of the adult population seems to migrate to greater depth during winter, possibly as an overwintering strategy. Further, the demographic data and a set of growth models suggest that females and males have deviating life history traits. Females grow to larger size but their growth rate is lower, and they may mature later than males. The presence of mature males and females with spermatophores attached during late June to August indicated that spawning had already started during mid-winter conditions. These data, which were uniquely sampled in the same region from summer to winter, provide a new perspective on the seasonal behavior and general life history of T. macrura Article in Journal/Newspaper Antarc* Antarctica Lazarev Sea Southern Ocean Thysanoessa macrura OpenAgrar (OA) Marine Ecology Progress Series 495 105 118 |
institution |
Open Polar |
collection |
OpenAgrar (OA) |
op_collection_id |
ftopenagrar |
language |
English |
topic |
article Text euphausiid seasonality demography seasonal vertical migration overwintering Southern Ocean |
spellingShingle |
article Text euphausiid seasonality demography seasonal vertical migration overwintering Southern Ocean Haraldsson, Matilda Siegel, Volker Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica |
topic_facet |
article Text euphausiid seasonality demography seasonal vertical migration overwintering Southern Ocean |
description |
Although Thysanoessa macrura is one of the most abundant and widely distributed euphausiid species in the Southern Ocean, knowledge about its seasonal distribution and overwintering strategy remains sparse. We describe the variation in abundance, demography, and distribution of T. macrura during 3 seasons in the Lazarev Sea, located in the south-east Atlantic sector of Antarctica. Adult and larval T. macrura were widely distributed across the Lazarev Sea in all seasons, but with large seasonal variability in the adult population. Mean summer densities (4.9 and 7.0 ind. m-2 in 2005/06 and 2007/08, respectively) were 20-fold higher than densities recorded during autumn (0.4 ind. m-2) and winter (0.2 ind. m-2). Comparison of length-frequency distributions and sex ratios, particularly between shallow (0-200 m) and deep (0-2000 m) samples taken during winter, suggest a seasonal vertical migration. A large proportion of the adult population seems to migrate to greater depth during winter, possibly as an overwintering strategy. Further, the demographic data and a set of growth models suggest that females and males have deviating life history traits. Females grow to larger size but their growth rate is lower, and they may mature later than males. The presence of mature males and females with spermatophores attached during late June to August indicated that spawning had already started during mid-winter conditions. These data, which were uniquely sampled in the same region from summer to winter, provide a new perspective on the seasonal behavior and general life history of T. macrura |
format |
Article in Journal/Newspaper |
author |
Haraldsson, Matilda Siegel, Volker |
author_facet |
Haraldsson, Matilda Siegel, Volker |
author_sort |
Haraldsson, Matilda |
title |
Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica |
title_short |
Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica |
title_full |
Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica |
title_fullStr |
Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica |
title_full_unstemmed |
Seasonal distribution and life history ofThysanoessa macrura(Euphausiacea, Crustacea) in high latitude waters of the Lazarev Sea, Antarctica |
title_sort |
seasonal distribution and life history ofthysanoessa macrura(euphausiacea, crustacea) in high latitude waters of the lazarev sea, antarctica |
publishDate |
2014 |
url |
https://doi.org/10.3354/meps10553 https://www.openagrar.de/receive/timport_mods_00013793 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013793/dn053144.pdf |
genre |
Antarc* Antarctica Lazarev Sea Southern Ocean Thysanoessa macrura |
genre_facet |
Antarc* Antarctica Lazarev Sea Southern Ocean Thysanoessa macrura |
op_relation |
Marine ecology progress series -- Mar Ecol Prog Ser MEPS -- 1616-1599 -- 0171-8630 -- 2022265-8 -- 800780-9 https://doi.org/10.3354/meps10553 https://www.openagrar.de/receive/timport_mods_00013793 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013793/dn053144.pdf |
op_rights |
only signed in user info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3354/meps10553 |
container_title |
Marine Ecology Progress Series |
container_volume |
495 |
container_start_page |
105 |
op_container_end_page |
118 |
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1810492058889093120 |