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Adélie penguin foraging behaviour and krill abundance along the Wilkes and Adélie land coasts, Antarctica

Identifieur interne : 005D83 ( PascalFrancis/Checkpoint ); précédent : 005D82; suivant : 005D84

Adélie penguin foraging behaviour and krill abundance along the Wilkes and Adélie land coasts, Antarctica

Auteurs : B. C. Wienecke [Australie] ; R. Lawless [Australie] ; D. Rodary [France] ; C.-A. Bost [France] ; R. Thomson [Australie] ; T. Pauly [Australie] ; G. Robertson [Australie] ; K. R. Kerry [Australie] ; Y. Lemaho [France]

Source :

RBID : Pascal:00-0475452

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English descriptors

Abstract

The foraging behaviour of Adélie penguins Pygoscelis adeliae was studied simultaneously at Shirley Island (SI, 110°E) and at Petrel Island (PI, 140°E) in approximate conjunction with the ship-based krill survey conducted on board the RSV Aurora Australis. Acoustic and trawl data were collected near both study sites, albeit at the end of the penguins' breeding season. The distances travelled by Adélie penguins from Shirley Island were significantly greater than those travelled by penguins from Petrel Island (SI 31-144 km; PI 6-79 km). Mean foraging trip durations and mean maximal distances travelled were also significantly different between colonies (duration: SI guard 55 ± 32 h, crèche 113 ± 17 h; PI guard 32 ± 9 h, crèche 25 ± 7 h; distance: SI guard 182 ± 135 km, crèche 353 ± 93 km; PI guard 100 ± 42 km, crèche 86 ± 28 km). All penguins foraged over the continental shelf or the shelf break and not in oceanic waters. The percentage distribution of dive depths was similar at both colonies; nearly 70% of all dives were to < 35 m. Trawls from the ship contained krill Euphausia superba and E. crystallorophias near SI but only E. superba near PI. Biomass measurements showed that near SI 61% of krill biomass occurred at 63-97 m but the penguins dived to this depth range only 12% of their time; near PI 83% of the biomass was found from 43 to 63 m and 20% of dives reached these depths. The diet of the SI penguins consisted mainly of E. crystallorophias (51-53% by mass), while penguins from PI ingested large amounts of both euphausiids (27-38% E. superba, 22-39% E. crystallorophias). At SI, the remainder of the diet consisted of fish, mainly Pleuragramma antarcticum (26-30%), and amphipods ( < 1%). Similarly, at PI, fish contributed 19-37% to the penguins' diet and amphipods constituted 1-3%.


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<div type="abstract" xml:lang="en">The foraging behaviour of Adélie penguins Pygoscelis adeliae was studied simultaneously at Shirley Island (SI, 110°E) and at Petrel Island (PI, 140°E) in approximate conjunction with the ship-based krill survey conducted on board the RSV Aurora Australis. Acoustic and trawl data were collected near both study sites, albeit at the end of the penguins' breeding season. The distances travelled by Adélie penguins from Shirley Island were significantly greater than those travelled by penguins from Petrel Island (SI 31-144 km; PI 6-79 km). Mean foraging trip durations and mean maximal distances travelled were also significantly different between colonies (duration: SI guard 55 ± 32 h, crèche 113 ± 17 h; PI guard 32 ± 9 h, crèche 25 ± 7 h; distance: SI guard 182 ± 135 km, crèche 353 ± 93 km; PI guard 100 ± 42 km, crèche 86 ± 28 km). All penguins foraged over the continental shelf or the shelf break and not in oceanic waters. The percentage distribution of dive depths was similar at both colonies; nearly 70% of all dives were to < 35 m. Trawls from the ship contained krill Euphausia superba and E. crystallorophias near SI but only E. superba near PI. Biomass measurements showed that near SI 61% of krill biomass occurred at 63-97 m but the penguins dived to this depth range only 12% of their time; near PI 83% of the biomass was found from 43 to 63 m and 20% of dives reached these depths. The diet of the SI penguins consisted mainly of E. crystallorophias (51-53% by mass), while penguins from PI ingested large amounts of both euphausiids (27-38% E. superba, 22-39% E. crystallorophias). At SI, the remainder of the diet consisted of fish, mainly Pleuragramma antarcticum (26-30%), and amphipods ( < 1%). Similarly, at PI, fish contributed 19-37% to the penguins' diet and amphipods constituted 1-3%.</div>
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<fA47 i1="01" i2="1">
<s0>00-0475452</s0>
</fA47>
<fA60>
<s1>P</s1>
</fA60>
<fA61>
<s0>A</s0>
</fA61>
<fA64 i1="01" i2="1">
<s0>Deep-sea research. Part 2. Topical studies in oceanography</s0>
</fA64>
<fA66 i1="01">
<s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG">
<s0>The foraging behaviour of Adélie penguins Pygoscelis adeliae was studied simultaneously at Shirley Island (SI, 110°E) and at Petrel Island (PI, 140°E) in approximate conjunction with the ship-based krill survey conducted on board the RSV Aurora Australis. Acoustic and trawl data were collected near both study sites, albeit at the end of the penguins' breeding season. The distances travelled by Adélie penguins from Shirley Island were significantly greater than those travelled by penguins from Petrel Island (SI 31-144 km; PI 6-79 km). Mean foraging trip durations and mean maximal distances travelled were also significantly different between colonies (duration: SI guard 55 ± 32 h, crèche 113 ± 17 h; PI guard 32 ± 9 h, crèche 25 ± 7 h; distance: SI guard 182 ± 135 km, crèche 353 ± 93 km; PI guard 100 ± 42 km, crèche 86 ± 28 km). All penguins foraged over the continental shelf or the shelf break and not in oceanic waters. The percentage distribution of dive depths was similar at both colonies; nearly 70% of all dives were to < 35 m. Trawls from the ship contained krill Euphausia superba and E. crystallorophias near SI but only E. superba near PI. Biomass measurements showed that near SI 61% of krill biomass occurred at 63-97 m but the penguins dived to this depth range only 12% of their time; near PI 83% of the biomass was found from 43 to 63 m and 20% of dives reached these depths. The diet of the SI penguins consisted mainly of E. crystallorophias (51-53% by mass), while penguins from PI ingested large amounts of both euphausiids (27-38% E. superba, 22-39% E. crystallorophias). At SI, the remainder of the diet consisted of fish, mainly Pleuragramma antarcticum (26-30%), and amphipods ( < 1%). Similarly, at PI, fish contributed 19-37% to the penguins' diet and amphipods constituted 1-3%.</s0>
</fC01>
<fC02 i1="01" i2="X">
<s0>002A14B02C2C</s0>
</fC02>
<fC02 i1="02" i2="X">
<s0>002A13C03</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Comportement alimentaire</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Feeding behavior</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Conducta alimenticia</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Régime alimentaire</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG">
<s0>Diet</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Régimen alimentario</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Zooplancton</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Zooplankton</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Zooplancton</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE">
<s0>Krill</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG">
<s0>Krill</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA">
<s0>Krill</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Surveillance écologique</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Environmental monitoring</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Vigilancia ecológica</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE">
<s0>Mers Antarctiques</s0>
<s2>NG</s2>
<s5>12</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG">
<s0>Southern Ocean</s0>
<s2>NG</s2>
<s5>12</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA">
<s0>Mares antárticos</s0>
<s2>NG</s2>
<s5>12</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Pygoscelis adeliae</s0>
<s2>NS</s2>
<s5>55</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>Pygoscelis adeliae</s0>
<s2>NS</s2>
<s5>55</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Pygoscelis adeliae</s0>
<s2>NS</s2>
<s5>55</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE">
<s0>Euphausia superba</s0>
<s2>NS</s2>
<s5>56</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG">
<s0>Euphausia superba</s0>
<s2>NS</s2>
<s5>56</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA">
<s0>Euphausia superba</s0>
<s2>NS</s2>
<s5>56</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE">
<s0>Spheniscidae</s0>
<s2>NS</s2>
<s4>INC</s4>
<s5>70</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE">
<s0>Euphausiacea</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG">
<s0>Euphausiacea</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA">
<s0>Euphausiacea</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE">
<s0>Crustacea</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG">
<s0>Crustacea</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA">
<s0>Crustacea</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE">
<s0>Arthropoda</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="ENG">
<s0>Arthropoda</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="SPA">
<s0>Arthropoda</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="FRE">
<s0>Invertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="ENG">
<s0>Invertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="SPA">
<s0>Invertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="FRE">
<s0>Milieu marin</s0>
<s5>13</s5>
</fC07>
<fC07 i1="05" i2="X" l="ENG">
<s0>Marine environment</s0>
<s5>13</s5>
</fC07>
<fC07 i1="05" i2="X" l="SPA">
<s0>Medio marino</s0>
<s5>13</s5>
</fC07>
<fC07 i1="06" i2="X" l="FRE">
<s0>Alimentation</s0>
<s5>18</s5>
</fC07>
<fC07 i1="06" i2="X" l="ENG">
<s0>Feeding</s0>
<s5>18</s5>
</fC07>
<fC07 i1="06" i2="X" l="SPA">
<s0>Alimentación</s0>
<s5>18</s5>
</fC07>
<fC07 i1="07" i2="X" l="FRE">
<s0>Aves</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="ENG">
<s0>Aves</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="SPA">
<s0>Aves</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="08" i2="X" l="FRE">
<s0>Vertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="08" i2="X" l="ENG">
<s0>Vertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="08" i2="X" l="SPA">
<s0>Vertebrata</s0>
<s2>NS</s2>
</fC07>
<fN21>
<s1>318</s1>
</fN21>
</pA>
</standard>
</inist>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>France</li>
</country>
<region>
<li>Alsace (région administrative)</li>
<li>Grand Est</li>
</region>
<settlement>
<li>Strasbourg</li>
</settlement>
</list>
<tree>
<country name="Australie">
<noRegion>
<name sortKey="Wienecke, B C" sort="Wienecke, B C" uniqKey="Wienecke B" first="B. C." last="Wienecke">B. C. Wienecke</name>
</noRegion>
<name sortKey="Kerry, K R" sort="Kerry, K R" uniqKey="Kerry K" first="K. R." last="Kerry">K. R. Kerry</name>
<name sortKey="Lawless, R" sort="Lawless, R" uniqKey="Lawless R" first="R." last="Lawless">R. Lawless</name>
<name sortKey="Pauly, T" sort="Pauly, T" uniqKey="Pauly T" first="T." last="Pauly">T. Pauly</name>
<name sortKey="Robertson, G" sort="Robertson, G" uniqKey="Robertson G" first="G." last="Robertson">G. Robertson</name>
<name sortKey="Thomson, R" sort="Thomson, R" uniqKey="Thomson R" first="R." last="Thomson">R. Thomson</name>
</country>
<country name="France">
<region name="Grand Est">
<name sortKey="Rodary, D" sort="Rodary, D" uniqKey="Rodary D" first="D." last="Rodary">D. Rodary</name>
</region>
<name sortKey="Bost, C A" sort="Bost, C A" uniqKey="Bost C" first="C.-A." last="Bost">C.-A. Bost</name>
<name sortKey="Lemaho, Y" sort="Lemaho, Y" uniqKey="Lemaho Y" first="Y." last="Lemaho">Y. Lemaho</name>
</country>
</tree>
</affiliations>
</record>

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