At surface behaviour at location on spot of southern elephant seals from Marion Island in 2004 with links to datasets
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| Auteurs principaux: | , , , , , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2015
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| _version_ | 1867170567765884928 |
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| author | Tosh, Cheryl Ann de Bruyn, P J Nico Steyn, Jumari Bornemann, Horst van den Hoff, John Stewart, Brent S Plötz, Joachim Bester, Marthán Nieuwoudt |
| author_facet | Tosh, Cheryl Ann de Bruyn, P J Nico Steyn, Jumari Bornemann, Horst van den Hoff, John Stewart, Brent S Plötz, Joachim Bester, Marthán Nieuwoudt |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A novel classification system was applied to the sea level anomaly (SLA) environment around Marion Island. We classified the SLA seascape into habitat types and calculated percentage of habitat use of ten juvenile southern elephant seals (SES). Movements were compared to SLA and SLA slope values indicative of ocean eddy features. This classification provides a measure of habitat change due to seasonal fluctuations in SLA. Some of the seals made two migrations in different seasons, each of similar duration and proportions of potential foraging behaviour. The seals in this study did not use any intense eddy features, but their behaviours varied with SLA class. Potential foraging behaviour was positively influenced by negative SLA values (i.e. areas of below average sea surface height). Searching behaviour during the winter was more likely at eddy edges where high SLA slope values correlated with low SLA values. Though the seals did not forage within newly spawned eddies, they did forage near the sub-Antarctic front. Plankton and other biological resources transported by eddies formed at the subtropical convergence zone are evidently concentrated in this region and enhance the food chain there, forming a foraging ground for juvenile SES from Marion Island. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_150015 |
| institution | PANGAEA |
| language | en |
| publishDate | 2015 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | At surface behaviour at location on spot of southern elephant seals from Marion Island in 2004 with links to datasets Tosh, Cheryl Ann de Bruyn, P J Nico Steyn, Jumari Bornemann, Horst van den Hoff, John Stewart, Brent S Plötz, Joachim Bester, Marthán Nieuwoudt MAR2004; MAR2004_sel_u_f_05; MAR2004_sel_u_f_11; MAR2004_sel_u_m_09; MAR2004_sel_u_m_21; MAR2004_sel_y_f_04; MAR2004_sel_y_f_08; MAR2004_sel_y_f_12; MAR2004_sel_y_f_13; MAR2004_sel_y_m_14; Marine endotherm; Marine Mammal Tracking; Marion Island Research Station; MET; MMT; Southern Ocean - Indian sector A novel classification system was applied to the sea level anomaly (SLA) environment around Marion Island. We classified the SLA seascape into habitat types and calculated percentage of habitat use of ten juvenile southern elephant seals (SES). Movements were compared to SLA and SLA slope values indicative of ocean eddy features. This classification provides a measure of habitat change due to seasonal fluctuations in SLA. Some of the seals made two migrations in different seasons, each of similar duration and proportions of potential foraging behaviour. The seals in this study did not use any intense eddy features, but their behaviours varied with SLA class. Potential foraging behaviour was positively influenced by negative SLA values (i.e. areas of below average sea surface height). Searching behaviour during the winter was more likely at eddy edges where high SLA slope values correlated with low SLA values. Though the seals did not forage within newly spawned eddies, they did forage near the sub-Antarctic front. Plankton and other biological resources transported by eddies formed at the subtropical convergence zone are evidently concentrated in this region and enhance the food chain there, forming a foraging ground for juvenile SES from Marion Island. |
| title | At surface behaviour at location on spot of southern elephant seals from Marion Island in 2004 with links to datasets |
| topic | MAR2004; MAR2004_sel_u_f_05; MAR2004_sel_u_f_11; MAR2004_sel_u_m_09; MAR2004_sel_u_m_21; MAR2004_sel_y_f_04; MAR2004_sel_y_f_08; MAR2004_sel_y_f_12; MAR2004_sel_y_f_13; MAR2004_sel_y_m_14; Marine endotherm; Marine Mammal Tracking; Marion Island Research Station; MET; MMT; Southern Ocean - Indian sector |
| url | https://doi.org/10.1594/PANGAEA.150015 |