Summer Foods of Lesser Scaup in Subarctic Taiga
Reports on the food of 25 adult and 38 juvenile Aythya affinis, collected in June-Sept 1967 along the Yellowknife Highway north of Great Slave Lake. The vegetation, physiography and ponds of the area, the collecting and statistical methods are briefly described. Approx 99% of the scaup diet was anim...
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The Arctic Institute of North America
1970
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66203 2023-05-15T14:19:19+02:00 Summer Foods of Lesser Scaup in Subarctic Taiga Bartonek, James C. Murdy, H.W. 1970-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66203 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66203/50116 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66203 ARCTIC; Vol. 23 No. 1 (1970): March: 1–63; 35-44 1923-1245 0004-0843 Loess info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1970 ftunivcalgaryojs 2022-03-22T21:23:07Z Reports on the food of 25 adult and 38 juvenile Aythya affinis, collected in June-Sept 1967 along the Yellowknife Highway north of Great Slave Lake. The vegetation, physiography and ponds of the area, the collecting and statistical methods are briefly described. Approx 99% of the scaup diet was animal material; juveniles in mid-summer fed on freeswimming organisms such as Chaoborinae (phantom midges) and Conchostraca (clam shrimps); in late summer they, as did adults in June, fed on bottom organisms such as amphipods, odonates and corixids. Seeds, copepods and cladocerans were seldom or never eaten. Alimentation estivale du petit milouin dans la taïga subarctique. 25 petits milouins (Aythya affinis) adultes et 38 juvéniles, capturés dans la taïga au nord du Grand lac des Esclaves, dans les Territoires du Nord-Ouest, n'avaient consommé que de la nourriture d'origine animale (99 ± 1%, P < 0.05). Au milieu de l'été, les spécimens juvéniles semblaient plutôt se nourrir d'organismes nageurs comme les Chaoborinées et les Conchostraces, tandis que vers la fin de l'été, ces mêmes oiseaux, tout comme les adultes en juin, tendaient à se nourrir d'organismes du fond: amphipodes, odonates et corixidés. Un échantillonnage des organismes aquatiques effectué au moment de la capture des canards, a révélé que les graines, les copépodes et les cladocères n'étaient presque jamais mangés; la consommation de tous les autres organismes se fait dans des proportions qui ne sont pas significativement différentes (P < 0.05) de celles des échantillons capturés. Article in Journal/Newspaper Arctic Grand Lac des Esclaves Great Slave Lake Subarctic subarctique* taiga Territoires du Nord-Ouest Yellowknife Copepods Esclave* University of Calgary Journal Hosting Grand lac des Esclaves ENVELOPE(-114.001,-114.001,61.500,61.500) Great Slave Lake ENVELOPE(-114.001,-114.001,61.500,61.500) Yellowknife ARCTIC 23 1 |
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University of Calgary Journal Hosting |
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ftunivcalgaryojs |
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English |
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Loess Bartonek, James C. Murdy, H.W. Summer Foods of Lesser Scaup in Subarctic Taiga |
topic_facet |
Loess |
description |
Reports on the food of 25 adult and 38 juvenile Aythya affinis, collected in June-Sept 1967 along the Yellowknife Highway north of Great Slave Lake. The vegetation, physiography and ponds of the area, the collecting and statistical methods are briefly described. Approx 99% of the scaup diet was animal material; juveniles in mid-summer fed on freeswimming organisms such as Chaoborinae (phantom midges) and Conchostraca (clam shrimps); in late summer they, as did adults in June, fed on bottom organisms such as amphipods, odonates and corixids. Seeds, copepods and cladocerans were seldom or never eaten. Alimentation estivale du petit milouin dans la taïga subarctique. 25 petits milouins (Aythya affinis) adultes et 38 juvéniles, capturés dans la taïga au nord du Grand lac des Esclaves, dans les Territoires du Nord-Ouest, n'avaient consommé que de la nourriture d'origine animale (99 ± 1%, P < 0.05). Au milieu de l'été, les spécimens juvéniles semblaient plutôt se nourrir d'organismes nageurs comme les Chaoborinées et les Conchostraces, tandis que vers la fin de l'été, ces mêmes oiseaux, tout comme les adultes en juin, tendaient à se nourrir d'organismes du fond: amphipodes, odonates et corixidés. Un échantillonnage des organismes aquatiques effectué au moment de la capture des canards, a révélé que les graines, les copépodes et les cladocères n'étaient presque jamais mangés; la consommation de tous les autres organismes se fait dans des proportions qui ne sont pas significativement différentes (P < 0.05) de celles des échantillons capturés. |
format |
Article in Journal/Newspaper |
author |
Bartonek, James C. Murdy, H.W. |
author_facet |
Bartonek, James C. Murdy, H.W. |
author_sort |
Bartonek, James C. |
title |
Summer Foods of Lesser Scaup in Subarctic Taiga |
title_short |
Summer Foods of Lesser Scaup in Subarctic Taiga |
title_full |
Summer Foods of Lesser Scaup in Subarctic Taiga |
title_fullStr |
Summer Foods of Lesser Scaup in Subarctic Taiga |
title_full_unstemmed |
Summer Foods of Lesser Scaup in Subarctic Taiga |
title_sort |
summer foods of lesser scaup in subarctic taiga |
publisher |
The Arctic Institute of North America |
publishDate |
1970 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66203 |
long_lat |
ENVELOPE(-114.001,-114.001,61.500,61.500) ENVELOPE(-114.001,-114.001,61.500,61.500) |
geographic |
Grand lac des Esclaves Great Slave Lake Yellowknife |
geographic_facet |
Grand lac des Esclaves Great Slave Lake Yellowknife |
genre |
Arctic Grand Lac des Esclaves Great Slave Lake Subarctic subarctique* taiga Territoires du Nord-Ouest Yellowknife Copepods Esclave* |
genre_facet |
Arctic Grand Lac des Esclaves Great Slave Lake Subarctic subarctique* taiga Territoires du Nord-Ouest Yellowknife Copepods Esclave* |
op_source |
ARCTIC; Vol. 23 No. 1 (1970): March: 1–63; 35-44 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66203/50116 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66203 |
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ARCTIC |
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23 |
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