Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography
Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of fou...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Siegel, Volker [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2012 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag 2012 |
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| Übergeordnetes Werk: |
Enthalten in: Polar biology - Berlin : Springer, 1982, 35(2012), 8 vom: 25. Feb., Seite 1151-1177 |
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| Übergeordnetes Werk: |
volume:35 ; year:2012 ; number:8 ; day:25 ; month:02 ; pages:1151-1177 |
| Links: |
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| DOI / URN: |
10.1007/s00300-012-1162-y |
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| Katalog-ID: |
SPR003934551 |
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| 245 | 1 | 0 | |a Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography |
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| 520 | |a Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. | ||
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| 650 | 4 | |a Population dynamics |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Re-maturation |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Day–night comparison |7 (dpeaa)DE-He213 | |
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10.1007/s00300-012-1162-y doi (DE-627)SPR003934551 (SPR)s00300-012-1162-y-e DE-627 ger DE-627 rakwb eng Siegel, Volker verfasserin aut Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2012 Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. Winter survey (dpeaa)DE-He213 Population dynamics (dpeaa)DE-He213 Re-maturation (dpeaa)DE-He213 Day–night comparison (dpeaa)DE-He213 Enthalten in Polar biology Berlin : Springer, 1982 35(2012), 8 vom: 25. Feb., Seite 1151-1177 (DE-627)271175427 (DE-600)1478942-5 1432-2056 nnns volume:35 year:2012 number:8 day:25 month:02 pages:1151-1177 https://dx.doi.org/10.1007/s00300-012-1162-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 35 2012 8 25 02 1151-1177 |
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10.1007/s00300-012-1162-y doi (DE-627)SPR003934551 (SPR)s00300-012-1162-y-e DE-627 ger DE-627 rakwb eng Siegel, Volker verfasserin aut Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2012 Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. Winter survey (dpeaa)DE-He213 Population dynamics (dpeaa)DE-He213 Re-maturation (dpeaa)DE-He213 Day–night comparison (dpeaa)DE-He213 Enthalten in Polar biology Berlin : Springer, 1982 35(2012), 8 vom: 25. Feb., Seite 1151-1177 (DE-627)271175427 (DE-600)1478942-5 1432-2056 nnns volume:35 year:2012 number:8 day:25 month:02 pages:1151-1177 https://dx.doi.org/10.1007/s00300-012-1162-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 35 2012 8 25 02 1151-1177 |
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10.1007/s00300-012-1162-y doi (DE-627)SPR003934551 (SPR)s00300-012-1162-y-e DE-627 ger DE-627 rakwb eng Siegel, Volker verfasserin aut Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2012 Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. Winter survey (dpeaa)DE-He213 Population dynamics (dpeaa)DE-He213 Re-maturation (dpeaa)DE-He213 Day–night comparison (dpeaa)DE-He213 Enthalten in Polar biology Berlin : Springer, 1982 35(2012), 8 vom: 25. Feb., Seite 1151-1177 (DE-627)271175427 (DE-600)1478942-5 1432-2056 nnns volume:35 year:2012 number:8 day:25 month:02 pages:1151-1177 https://dx.doi.org/10.1007/s00300-012-1162-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 35 2012 8 25 02 1151-1177 |
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10.1007/s00300-012-1162-y doi (DE-627)SPR003934551 (SPR)s00300-012-1162-y-e DE-627 ger DE-627 rakwb eng Siegel, Volker verfasserin aut Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2012 Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. Winter survey (dpeaa)DE-He213 Population dynamics (dpeaa)DE-He213 Re-maturation (dpeaa)DE-He213 Day–night comparison (dpeaa)DE-He213 Enthalten in Polar biology Berlin : Springer, 1982 35(2012), 8 vom: 25. Feb., Seite 1151-1177 (DE-627)271175427 (DE-600)1478942-5 1432-2056 nnns volume:35 year:2012 number:8 day:25 month:02 pages:1151-1177 https://dx.doi.org/10.1007/s00300-012-1162-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 35 2012 8 25 02 1151-1177 |
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10.1007/s00300-012-1162-y doi (DE-627)SPR003934551 (SPR)s00300-012-1162-y-e DE-627 ger DE-627 rakwb eng Siegel, Volker verfasserin aut Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2012 Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. Winter survey (dpeaa)DE-He213 Population dynamics (dpeaa)DE-He213 Re-maturation (dpeaa)DE-He213 Day–night comparison (dpeaa)DE-He213 Enthalten in Polar biology Berlin : Springer, 1982 35(2012), 8 vom: 25. Feb., Seite 1151-1177 (DE-627)271175427 (DE-600)1478942-5 1432-2056 nnns volume:35 year:2012 number:8 day:25 month:02 pages:1151-1177 https://dx.doi.org/10.1007/s00300-012-1162-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 35 2012 8 25 02 1151-1177 |
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The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. 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Siegel, Volker |
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Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography Winter survey (dpeaa)DE-He213 Population dynamics (dpeaa)DE-He213 Re-maturation (dpeaa)DE-He213 Day–night comparison (dpeaa)DE-He213 |
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krill stocks in high latitudes of the antarctic lazarev sea: seasonal and interannual variation in distribution, abundance and demography |
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Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography |
| abstract |
Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. © Springer-Verlag 2012 |
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Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. © Springer-Verlag 2012 |
| abstract_unstemmed |
Abstract The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea. © Springer-Verlag 2012 |
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Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography |
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| score |
7.4003096 |