Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers
This study examined foraging strategies in male Northern Shovelers (Anas clypeata) and Blue-winged Teal (Anas discors). Differences in time–activity budgets and esophageal contents between the two species indicated major differences in the degree of foraging specialization. Preflightless male Northe...
Published in: | Canadian Journal of Zoology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1985
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/z85-194 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-194 |
id |
crcansciencepubl:10.1139/z85-194 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/z85-194 2023-12-17T10:18:27+01:00 Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers DuBowy, Paul J. 1985 http://dx.doi.org/10.1139/z85-194 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-194 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 63, issue 6, page 1292-1297 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1985 crcansciencepubl https://doi.org/10.1139/z85-194 2023-11-19T13:38:07Z This study examined foraging strategies in male Northern Shovelers (Anas clypeata) and Blue-winged Teal (Anas discors). Differences in time–activity budgets and esophageal contents between the two species indicated major differences in the degree of foraging specialization. Preflightless male Northern Shovelers spent 84.2% of time foraging, with dabbling in the water column as the principal foraging mode (83.4%), while postflightless male shovelers spent 81.6% of time foraging (78.7% dabbling). Preflightless male Blue-winged Teal spent 68.6% of time foraging, with dabbling in mud (32.5%) and picking in vegetation (29.4%) as the two principal modes, whereas postflightless male bluewings spent 85.9% of time foraging (dabbling in mud 40.6%, and picking 34.2%). Most male Northern Shoveler food items were cladocerans (85.5%) or chironomid pupae (12.9%); this was related to the specialized foraging method employed by shovelers. Male Blue-winged Teal food items were principally gastropods (44.3%), culicids (29.2%), seeds and vegetation (15.5%), and chironomids (5.6%), which corresponded to the plastic feeding behaviors of bluewings. Examination of esophageal items revealed that male Northern Shovelers did little feeding during the summer flightless period, while male Blue-winged Teal fed throughout the period. Article in Journal/Newspaper Anas clypeata Northern Shoveler Shoveler Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 63 6 1292 1297 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics DuBowy, Paul J. Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
This study examined foraging strategies in male Northern Shovelers (Anas clypeata) and Blue-winged Teal (Anas discors). Differences in time–activity budgets and esophageal contents between the two species indicated major differences in the degree of foraging specialization. Preflightless male Northern Shovelers spent 84.2% of time foraging, with dabbling in the water column as the principal foraging mode (83.4%), while postflightless male shovelers spent 81.6% of time foraging (78.7% dabbling). Preflightless male Blue-winged Teal spent 68.6% of time foraging, with dabbling in mud (32.5%) and picking in vegetation (29.4%) as the two principal modes, whereas postflightless male bluewings spent 85.9% of time foraging (dabbling in mud 40.6%, and picking 34.2%). Most male Northern Shoveler food items were cladocerans (85.5%) or chironomid pupae (12.9%); this was related to the specialized foraging method employed by shovelers. Male Blue-winged Teal food items were principally gastropods (44.3%), culicids (29.2%), seeds and vegetation (15.5%), and chironomids (5.6%), which corresponded to the plastic feeding behaviors of bluewings. Examination of esophageal items revealed that male Northern Shovelers did little feeding during the summer flightless period, while male Blue-winged Teal fed throughout the period. |
format |
Article in Journal/Newspaper |
author |
DuBowy, Paul J. |
author_facet |
DuBowy, Paul J. |
author_sort |
DuBowy, Paul J. |
title |
Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers |
title_short |
Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers |
title_full |
Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers |
title_fullStr |
Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers |
title_full_unstemmed |
Feeding ecology and behavior of postbreeding male Blue-winged Teal and Northern Shovelers |
title_sort |
feeding ecology and behavior of postbreeding male blue-winged teal and northern shovelers |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/z85-194 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-194 |
genre |
Anas clypeata Northern Shoveler Shoveler |
genre_facet |
Anas clypeata Northern Shoveler Shoveler |
op_source |
Canadian Journal of Zoology volume 63, issue 6, page 1292-1297 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z85-194 |
container_title |
Canadian Journal of Zoology |
container_volume |
63 |
container_issue |
6 |
container_start_page |
1292 |
op_container_end_page |
1297 |
_version_ |
1785564340561117184 |