Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel
Knowledge of seabirds’ diet at each breeding site and its temporal variation is key to understanding and evaluating how changes in marine resources affect each seabird population. In this study, we determined the diet of Magellanic penguins (MP, Spheniscus magellanicus) at Martillo Island, accountin...
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ftconicet:oai:ri.conicet.gov.ar:11336/37085 2023-10-09T21:46:26+02:00 Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel Scioscia, Gabriela Raya Rey, Andrea Nélida Saenz Samaniego, Ricardo Andres Florentin, Olga Viviana Schiavini, Adrian Carlos Miguel application/pdf http://hdl.handle.net/11336/37085 eng eng Springer info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-014-1532-8 http://hdl.handle.net/11336/37085 Scioscia, Gabriela; Raya Rey, Andrea Nélida; Saenz Samaniego, Ricardo Andres; Florentin, Olga Viviana; Schiavini, Adrian Carlos Miguel; Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel; Springer; Polar Biology; 37; 10; 8-2014; 1421-1433 0722-4060 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Diet Composition Seabirds Sub-Antarctic Temporal Fluctuation Tierra del Fuego https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1007/s00300-014-1532-8 2023-09-24T19:01:46Z Knowledge of seabirds’ diet at each breeding site and its temporal variation is key to understanding and evaluating how changes in marine resources affect each seabird population. In this study, we determined the diet of Magellanic penguins (MP, Spheniscus magellanicus) at Martillo Island, accounting for sex, breeding stage and year. We analyzed a total of 144 stomach contents during three consecutive breeding seasons (2006–2007, 2007–2008 and 2008–2009) and stages (incubation, early and late chick-rearing). MP fed mainly on fuegian sprat (Sprattus fuegensis), which represented 75 % of the biomass consumed by birds during the entire study. The next important prey was squat lobster (Munida gregaria), followed by Patagonian squid (Loligo gahi). Both sexes consumed similar prey items. We observed variation in diet relative composition among breeding years and stages. Fuegian sprat consumption decreased throughout the years whereas squat lobster increased. Penguins consumed a higher proportion of squat lobster and Patagonian squid during the incubation stage than in the chick-rearing stages, whereas fuegian sprat was almost the only prey item consumed during the late chick-rearing stage. MPs show certain flexibility in the use of resources probably as a response to changes in prey populations. Variability in the diet among different reproductive stages could be related to changes in the distribution and abundance of their main prey near the colony during the breeding season together with changes in the energy requirements of seabirds. Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Saenz Samaniego, Ricardo Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Florentin, Olga Viviana. Consejo ... Article in Journal/Newspaper Antarc* Antarctic Polar Biology Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Argentina Austral Martillo ENVELOPE(-60.817,-60.817,-63.500,-63.500) Nélida ENVELOPE(-57.167,-57.167,-63.367,-63.367) Ricardo ENVELOPE(-63.033,-63.033,-64.867,-64.867) Saenz ENVELOPE(-60.967,-60.967,-66.000,-66.000) Polar Biology 37 10 1421 1433 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Diet Composition Seabirds Sub-Antarctic Temporal Fluctuation Tierra del Fuego https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Diet Composition Seabirds Sub-Antarctic Temporal Fluctuation Tierra del Fuego https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Scioscia, Gabriela Raya Rey, Andrea Nélida Saenz Samaniego, Ricardo Andres Florentin, Olga Viviana Schiavini, Adrian Carlos Miguel Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel |
topic_facet |
Diet Composition Seabirds Sub-Antarctic Temporal Fluctuation Tierra del Fuego https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Knowledge of seabirds’ diet at each breeding site and its temporal variation is key to understanding and evaluating how changes in marine resources affect each seabird population. In this study, we determined the diet of Magellanic penguins (MP, Spheniscus magellanicus) at Martillo Island, accounting for sex, breeding stage and year. We analyzed a total of 144 stomach contents during three consecutive breeding seasons (2006–2007, 2007–2008 and 2008–2009) and stages (incubation, early and late chick-rearing). MP fed mainly on fuegian sprat (Sprattus fuegensis), which represented 75 % of the biomass consumed by birds during the entire study. The next important prey was squat lobster (Munida gregaria), followed by Patagonian squid (Loligo gahi). Both sexes consumed similar prey items. We observed variation in diet relative composition among breeding years and stages. Fuegian sprat consumption decreased throughout the years whereas squat lobster increased. Penguins consumed a higher proportion of squat lobster and Patagonian squid during the incubation stage than in the chick-rearing stages, whereas fuegian sprat was almost the only prey item consumed during the late chick-rearing stage. MPs show certain flexibility in the use of resources probably as a response to changes in prey populations. Variability in the diet among different reproductive stages could be related to changes in the distribution and abundance of their main prey near the colony during the breeding season together with changes in the energy requirements of seabirds. Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Saenz Samaniego, Ricardo Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Florentin, Olga Viviana. Consejo ... |
format |
Article in Journal/Newspaper |
author |
Scioscia, Gabriela Raya Rey, Andrea Nélida Saenz Samaniego, Ricardo Andres Florentin, Olga Viviana Schiavini, Adrian Carlos Miguel |
author_facet |
Scioscia, Gabriela Raya Rey, Andrea Nélida Saenz Samaniego, Ricardo Andres Florentin, Olga Viviana Schiavini, Adrian Carlos Miguel |
author_sort |
Scioscia, Gabriela |
title |
Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel |
title_short |
Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel |
title_full |
Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel |
title_fullStr |
Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel |
title_full_unstemmed |
Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel |
title_sort |
intra- and interannual variation in the diet of the magellanic penguin (spheniscusmagellanicus) at martillo island, beagle channel |
publisher |
Springer |
url |
http://hdl.handle.net/11336/37085 |
long_lat |
ENVELOPE(-60.817,-60.817,-63.500,-63.500) ENVELOPE(-57.167,-57.167,-63.367,-63.367) ENVELOPE(-63.033,-63.033,-64.867,-64.867) ENVELOPE(-60.967,-60.967,-66.000,-66.000) |
geographic |
Antarctic Argentina Austral Martillo Nélida Ricardo Saenz |
geographic_facet |
Antarctic Argentina Austral Martillo Nélida Ricardo Saenz |
genre |
Antarc* Antarctic Polar Biology Tierra del Fuego |
genre_facet |
Antarc* Antarctic Polar Biology Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-014-1532-8 http://hdl.handle.net/11336/37085 Scioscia, Gabriela; Raya Rey, Andrea Nélida; Saenz Samaniego, Ricardo Andres; Florentin, Olga Viviana; Schiavini, Adrian Carlos Miguel; Intra- and interannual variation in the diet of the Magellanic penguin (Spheniscusmagellanicus) at Martillo Island, Beagle Channel; Springer; Polar Biology; 37; 10; 8-2014; 1421-1433 0722-4060 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s00300-014-1532-8 |
container_title |
Polar Biology |
container_volume |
37 |
container_issue |
10 |
container_start_page |
1421 |
op_container_end_page |
1433 |
_version_ |
1779322137823150080 |