Using predicted patterns of 3D prey distribution to map king penguin foraging habitat
International audience King penguins (Aptenodytes patagonicus) are an iconic Southern Ocean species, butthe prey distributions that underpin their at-sea foraging tracks and diving behaviourremain unclear. We conducted simultaneous acoustic surveys off South Georgia andtracking of king penguins bree...
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Online Access: | https://hal.science/hal-03460885 https://doi.org/10.3389/fmars.2021.745200 |
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ftunivnantes:oai:HAL:hal-03460885v1 2023-05-15T16:42:08+02:00 Using predicted patterns of 3D prey distribution to map king penguin foraging habitat Proud, Roland Le Guen, Camille Sherley, Richard B. Kato, Akiko Ropert‐coudert, Yan Ratcliffe, Norman Jarman, Simon Wyness, Adam Arnould, John P. Y. Saunders, Ryan, Fernandes, Paul G. Boehme, Lars Brierley, Andrew S. Pelagic Ecology Research Group, Scottish Oceans Institut Centre for Ecology and Conservation University of Exeter Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) School of Biological Sciences, University of Western Australia Australia The University of Western Australia (UWA) Coastal Research Group, Department of Zoology and Entomology South Africa Rhodes University, Grahamstown School of Life and Environmental Sciences, Faculty of Science and Technology Deakin University Burwood School of Biological Sciences Aberdeen University of Aberdeen Scottish Oceans Institute University of St Andrews (SOI) School of Biology University of St Andrews University of St Andrews Scotland -University of St Andrews Scotland 2021 https://hal.science/hal-03460885 https://doi.org/10.3389/fmars.2021.745200 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2021.745200 hal-03460885 https://hal.science/hal-03460885 doi:10.3389/fmars.2021.745200 ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-03460885 Frontiers in Marine Science, 2021, 8 (745200), ⟨10.3389/fmars.2021.745200⟩ acoustic surveys Aptenodytes patagonicus diving behaviour foraging habitat king penguin prey distribution Southern Ocean South Georgia [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.3389/fmars.2021.745200 2023-03-08T02:21:36Z International audience King penguins (Aptenodytes patagonicus) are an iconic Southern Ocean species, butthe prey distributions that underpin their at-sea foraging tracks and diving behaviourremain unclear. We conducted simultaneous acoustic surveys off South Georgia andtracking of king penguins breeding ashore there in Austral summer 2017 to gain insightinto habitat use and foraging behaviour. Acoustic surveys revealed ubiquitous deepscattering layers (DSLs; acoustically detected layers of fish and other micronekton thatinhabit the mesopelagic zone) at c. 500 m and shallower ephemeral fish schools. Basedon DNA extracted from penguin faecal samples, these schools were likely comprised oflanternfish (an important component of king penguin diets), icefish (Channichthyidaespp.) and painted noties (Lepidonotothen larseni). Penguins did not dive as deepas DSLs, but their prey-encounter depth-distributions, as revealed by biologging,overlapped at fine scale (10s of m) with depths of acoustically detected fish schools.We used neural networks to predict local scale (10 km) fish echo intensity and depthdistribution at penguin dive locations based on environmental correlates, and developedmodels of habitat use. Habitat modelling revealed that king penguins preferentiallyforaged at locations predicted to have shallow and dense (high acoustic energy) fishschools associated with shallow and dense DSLs. These associations could be used topredict the distribution of king penguins from other colonies at South Georgia for whichno tracking data are available, and to identify areas of potential ecological significancewithin the South Georgia and the South Sandwich Islands marine protected area. Article in Journal/Newspaper Icefish King Penguins South Sandwich Islands Southern Ocean Université de Nantes: HAL-UNIV-NANTES Southern Ocean Austral Sandwich Islands South Sandwich Islands South Georgia ENVELOPE(-33.000,-33.000,-56.000,-56.000) Frontiers in Marine Science 8 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
acoustic surveys Aptenodytes patagonicus diving behaviour foraging habitat king penguin prey distribution Southern Ocean South Georgia [SDE]Environmental Sciences |
spellingShingle |
acoustic surveys Aptenodytes patagonicus diving behaviour foraging habitat king penguin prey distribution Southern Ocean South Georgia [SDE]Environmental Sciences Proud, Roland Le Guen, Camille Sherley, Richard B. Kato, Akiko Ropert‐coudert, Yan Ratcliffe, Norman Jarman, Simon Wyness, Adam Arnould, John P. Y. Saunders, Ryan, Fernandes, Paul G. Boehme, Lars Brierley, Andrew S. Using predicted patterns of 3D prey distribution to map king penguin foraging habitat |
topic_facet |
acoustic surveys Aptenodytes patagonicus diving behaviour foraging habitat king penguin prey distribution Southern Ocean South Georgia [SDE]Environmental Sciences |
description |
International audience King penguins (Aptenodytes patagonicus) are an iconic Southern Ocean species, butthe prey distributions that underpin their at-sea foraging tracks and diving behaviourremain unclear. We conducted simultaneous acoustic surveys off South Georgia andtracking of king penguins breeding ashore there in Austral summer 2017 to gain insightinto habitat use and foraging behaviour. Acoustic surveys revealed ubiquitous deepscattering layers (DSLs; acoustically detected layers of fish and other micronekton thatinhabit the mesopelagic zone) at c. 500 m and shallower ephemeral fish schools. Basedon DNA extracted from penguin faecal samples, these schools were likely comprised oflanternfish (an important component of king penguin diets), icefish (Channichthyidaespp.) and painted noties (Lepidonotothen larseni). Penguins did not dive as deepas DSLs, but their prey-encounter depth-distributions, as revealed by biologging,overlapped at fine scale (10s of m) with depths of acoustically detected fish schools.We used neural networks to predict local scale (10 km) fish echo intensity and depthdistribution at penguin dive locations based on environmental correlates, and developedmodels of habitat use. Habitat modelling revealed that king penguins preferentiallyforaged at locations predicted to have shallow and dense (high acoustic energy) fishschools associated with shallow and dense DSLs. These associations could be used topredict the distribution of king penguins from other colonies at South Georgia for whichno tracking data are available, and to identify areas of potential ecological significancewithin the South Georgia and the South Sandwich Islands marine protected area. |
author2 |
Pelagic Ecology Research Group, Scottish Oceans Institut Centre for Ecology and Conservation University of Exeter Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) School of Biological Sciences, University of Western Australia Australia The University of Western Australia (UWA) Coastal Research Group, Department of Zoology and Entomology South Africa Rhodes University, Grahamstown School of Life and Environmental Sciences, Faculty of Science and Technology Deakin University Burwood School of Biological Sciences Aberdeen University of Aberdeen Scottish Oceans Institute University of St Andrews (SOI) School of Biology University of St Andrews University of St Andrews Scotland -University of St Andrews Scotland |
format |
Article in Journal/Newspaper |
author |
Proud, Roland Le Guen, Camille Sherley, Richard B. Kato, Akiko Ropert‐coudert, Yan Ratcliffe, Norman Jarman, Simon Wyness, Adam Arnould, John P. Y. Saunders, Ryan, Fernandes, Paul G. Boehme, Lars Brierley, Andrew S. |
author_facet |
Proud, Roland Le Guen, Camille Sherley, Richard B. Kato, Akiko Ropert‐coudert, Yan Ratcliffe, Norman Jarman, Simon Wyness, Adam Arnould, John P. Y. Saunders, Ryan, Fernandes, Paul G. Boehme, Lars Brierley, Andrew S. |
author_sort |
Proud, Roland |
title |
Using predicted patterns of 3D prey distribution to map king penguin foraging habitat |
title_short |
Using predicted patterns of 3D prey distribution to map king penguin foraging habitat |
title_full |
Using predicted patterns of 3D prey distribution to map king penguin foraging habitat |
title_fullStr |
Using predicted patterns of 3D prey distribution to map king penguin foraging habitat |
title_full_unstemmed |
Using predicted patterns of 3D prey distribution to map king penguin foraging habitat |
title_sort |
using predicted patterns of 3d prey distribution to map king penguin foraging habitat |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03460885 https://doi.org/10.3389/fmars.2021.745200 |
long_lat |
ENVELOPE(-33.000,-33.000,-56.000,-56.000) |
geographic |
Southern Ocean Austral Sandwich Islands South Sandwich Islands South Georgia |
geographic_facet |
Southern Ocean Austral Sandwich Islands South Sandwich Islands South Georgia |
genre |
Icefish King Penguins South Sandwich Islands Southern Ocean |
genre_facet |
Icefish King Penguins South Sandwich Islands Southern Ocean |
op_source |
ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-03460885 Frontiers in Marine Science, 2021, 8 (745200), ⟨10.3389/fmars.2021.745200⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2021.745200 hal-03460885 https://hal.science/hal-03460885 doi:10.3389/fmars.2021.745200 |
op_doi |
https://doi.org/10.3389/fmars.2021.745200 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1766032568408342528 |