Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator
18 pages International audience The large temporal and spatial variability in marine productivity encountered by marine predators may negatively influence breeding success. The Antarctic fur seal Arctocephalus gazella (AFS), a marine predator in the Southern Ocean (SO) ecosystem with a circumpolar d...
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Online Access: | https://hal.science/hal-00184650 https://doi.org/10.3354/meps310077 |
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ftunivnantes:oai:HAL:hal-00184650v1 2023-05-15T13:49:49+02:00 Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator Lea, Mary-Anne Guinet, Christophe Cherel, Yves Duhamel, Guy Dubroca, Laurent Pruvost, Patrice Hindell, Mark Antarctic Wildlife Research Unit University of Tasmania Hobart, Australia (UTAS) Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) 2006-03 https://hal.science/hal-00184650 https://doi.org/10.3354/meps310077 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps310077 hal-00184650 https://hal.science/hal-00184650 doi:10.3354/meps310077 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00184650 Marine Ecology Progress Series, 2006, 310, pp.77-94. ⟨10.3354/meps310077⟩ Diving Seabird Myctophid Growth ENSO Polar Front Antarctic fur seal Foraging Pinniped Maternal care [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2006 ftunivnantes https://doi.org/10.3354/meps310077 2023-02-08T08:28:15Z 18 pages International audience The large temporal and spatial variability in marine productivity encountered by marine predators may negatively influence breeding success. The Antarctic fur seal Arctocephalus gazella (AFS), a marine predator in the Southern Ocean (SO) ecosystem with a circumpolar distribution, exhibits a short, 4 mo lactation coinciding with increased summer marine productivity. The diet of AFS, and the distance to significant and productive oceanographic features, such as the Antarctic Polar Frontal Zone (PFZ), varies considerably between populations. We studied the foraging activity, foraging efficiency and the pup provisioning strategies of lactating AFS at a key breeding site in the southern Indian Ocean, the Kerguelen Archipelago. Foraging parameters were examined in relation to interannual variability in oceanographic conditions and prey availability in the PFZ over 3 consecutive breeding seasons (1998 to 2000). The location of foraging zones, diving activity, diet and foraging efficiency varied significantly between years, concurrently with annual changes in seasurface temperature (SST) and prey availability. The strongest recorded El Niño Southern Oscillation event in 1997–1998 coincided with anomalously warm waters in the vicinity of the Archipelago. Deeper diving by females, reduced maternal and pup body condition, and minimal pup growth rates and low catch per unit effort of the primary prey species, lanternfishes (Myctophidae) were all recorded in this period. Maternal size was positively related to the growth performance of pups only in this period, indicating the importance of age/size and/or experience in mediating environmental fluctuations. Foraging efficiency over a foraging cycle and variability in mean provisioning rates (trip duration), were identified as proxies of prey availability within the foraging range of seals, emphasising the effectiveness of the use of AFS foraging behaviour as an indicator of both food and oceanographic variability and climatic anomalies. The ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Southern Ocean The Antarctic Kerguelen Indian Marine Ecology Progress Series 310 77 94 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Diving Seabird Myctophid Growth ENSO Polar Front Antarctic fur seal Foraging Pinniped Maternal care [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Diving Seabird Myctophid Growth ENSO Polar Front Antarctic fur seal Foraging Pinniped Maternal care [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes Lea, Mary-Anne Guinet, Christophe Cherel, Yves Duhamel, Guy Dubroca, Laurent Pruvost, Patrice Hindell, Mark Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator |
topic_facet |
Diving Seabird Myctophid Growth ENSO Polar Front Antarctic fur seal Foraging Pinniped Maternal care [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
description |
18 pages International audience The large temporal and spatial variability in marine productivity encountered by marine predators may negatively influence breeding success. The Antarctic fur seal Arctocephalus gazella (AFS), a marine predator in the Southern Ocean (SO) ecosystem with a circumpolar distribution, exhibits a short, 4 mo lactation coinciding with increased summer marine productivity. The diet of AFS, and the distance to significant and productive oceanographic features, such as the Antarctic Polar Frontal Zone (PFZ), varies considerably between populations. We studied the foraging activity, foraging efficiency and the pup provisioning strategies of lactating AFS at a key breeding site in the southern Indian Ocean, the Kerguelen Archipelago. Foraging parameters were examined in relation to interannual variability in oceanographic conditions and prey availability in the PFZ over 3 consecutive breeding seasons (1998 to 2000). The location of foraging zones, diving activity, diet and foraging efficiency varied significantly between years, concurrently with annual changes in seasurface temperature (SST) and prey availability. The strongest recorded El Niño Southern Oscillation event in 1997–1998 coincided with anomalously warm waters in the vicinity of the Archipelago. Deeper diving by females, reduced maternal and pup body condition, and minimal pup growth rates and low catch per unit effort of the primary prey species, lanternfishes (Myctophidae) were all recorded in this period. Maternal size was positively related to the growth performance of pups only in this period, indicating the importance of age/size and/or experience in mediating environmental fluctuations. Foraging efficiency over a foraging cycle and variability in mean provisioning rates (trip duration), were identified as proxies of prey availability within the foraging range of seals, emphasising the effectiveness of the use of AFS foraging behaviour as an indicator of both food and oceanographic variability and climatic anomalies. The ... |
author2 |
Antarctic Wildlife Research Unit University of Tasmania Hobart, Australia (UTAS) Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) |
format |
Article in Journal/Newspaper |
author |
Lea, Mary-Anne Guinet, Christophe Cherel, Yves Duhamel, Guy Dubroca, Laurent Pruvost, Patrice Hindell, Mark |
author_facet |
Lea, Mary-Anne Guinet, Christophe Cherel, Yves Duhamel, Guy Dubroca, Laurent Pruvost, Patrice Hindell, Mark |
author_sort |
Lea, Mary-Anne |
title |
Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator |
title_short |
Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator |
title_full |
Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator |
title_fullStr |
Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator |
title_full_unstemmed |
Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator |
title_sort |
impacts of climatic anomalies on provisioning strategies of a southern ocean predator |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00184650 https://doi.org/10.3354/meps310077 |
geographic |
Antarctic Southern Ocean The Antarctic Kerguelen Indian |
geographic_facet |
Antarctic Southern Ocean The Antarctic Kerguelen Indian |
genre |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Southern Ocean |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00184650 Marine Ecology Progress Series, 2006, 310, pp.77-94. ⟨10.3354/meps310077⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps310077 hal-00184650 https://hal.science/hal-00184650 doi:10.3354/meps310077 |
op_doi |
https://doi.org/10.3354/meps310077 |
container_title |
Marine Ecology Progress Series |
container_volume |
310 |
container_start_page |
77 |
op_container_end_page |
94 |
_version_ |
1766252330887413760 |