Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia
We compared the general breeding and feeding ecology of ospreys (Pandion haliaetus) in the Creston and Nelson areas of southeastern British Columbia. In the Creston Valley, ospreys nested atop tall trees surrounding a shallow and productive warm-water marsh. Prey species taken by male ospreys includ...
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Canadian Science Publishing
1992
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Online Access: | http://dx.doi.org/10.1139/z92-071 http://www.nrcresearchpress.com/doi/pdf/10.1139/z92-071 |
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crcansciencepubl:10.1139/z92-071 2023-12-17T10:28:47+01:00 Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia Steeger, Christoph Esselink, Hans Ydenberg, Ronald C. 1992 http://dx.doi.org/10.1139/z92-071 http://www.nrcresearchpress.com/doi/pdf/10.1139/z92-071 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 70, issue 3, page 470-475 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1992 crcansciencepubl https://doi.org/10.1139/z92-071 2023-11-19T13:39:26Z We compared the general breeding and feeding ecology of ospreys (Pandion haliaetus) in the Creston and Nelson areas of southeastern British Columbia. In the Creston Valley, ospreys nested atop tall trees surrounding a shallow and productive warm-water marsh. Prey species taken by male ospreys included black bullhead (Ictalurus melas), pumpkinseed (Lepomis gibbosus), and yellow perch (Perca flavescens). In contrast, near Nelson, ospreys nested on man-made structures along the narrow West Arm of Kootenay Lake. Osprey prey species in the Nelson area included longnose sucker (Catostomus catostomus), largescale sucker (Catostomus macrocheilus), and mountain whitefish (Prosopium williamsoni). Prey captured at Nelson were larger and contained significantly more energy than at Creston Valley, and hunting from a perch was used for 26% of all captures. All Creston Valley prey were caught by flight hunting. The strike success of foraging ospreys at Nelson was significantly higher than at Creston, and the net yield of flight hunting was 3 times higher. In spite of these differences, the breeding performance of ospreys in the two areas was very similar. Average clutch size was 2.8, brood size at hatching was 2.0, and the average pair fledged 1.4 young. The nest failure rate did not differ between the two areas. Most clutches were initiated in early May, with Nelson-area ospreys laying, on average, 4–7 days later. Egg volumes were smaller at Nelson (66.6 vs. 69.1 cm 3 ). However, the rate at which nestlings gained mass was significantly greater at Nelson. We discuss reasons why the breeding performance varies so little in spite of the great differences in feeding regime. Article in Journal/Newspaper Catostomus catostomus Longnose sucker Pandion haliaetus Canadian Science Publishing (via Crossref) West Arm ENVELOPE(62.863,62.863,-67.600,-67.600) Canadian Journal of Zoology 70 3 470 475 |
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 Steeger, Christoph Esselink, Hans Ydenberg, Ronald C. Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
We compared the general breeding and feeding ecology of ospreys (Pandion haliaetus) in the Creston and Nelson areas of southeastern British Columbia. In the Creston Valley, ospreys nested atop tall trees surrounding a shallow and productive warm-water marsh. Prey species taken by male ospreys included black bullhead (Ictalurus melas), pumpkinseed (Lepomis gibbosus), and yellow perch (Perca flavescens). In contrast, near Nelson, ospreys nested on man-made structures along the narrow West Arm of Kootenay Lake. Osprey prey species in the Nelson area included longnose sucker (Catostomus catostomus), largescale sucker (Catostomus macrocheilus), and mountain whitefish (Prosopium williamsoni). Prey captured at Nelson were larger and contained significantly more energy than at Creston Valley, and hunting from a perch was used for 26% of all captures. All Creston Valley prey were caught by flight hunting. The strike success of foraging ospreys at Nelson was significantly higher than at Creston, and the net yield of flight hunting was 3 times higher. In spite of these differences, the breeding performance of ospreys in the two areas was very similar. Average clutch size was 2.8, brood size at hatching was 2.0, and the average pair fledged 1.4 young. The nest failure rate did not differ between the two areas. Most clutches were initiated in early May, with Nelson-area ospreys laying, on average, 4–7 days later. Egg volumes were smaller at Nelson (66.6 vs. 69.1 cm 3 ). However, the rate at which nestlings gained mass was significantly greater at Nelson. We discuss reasons why the breeding performance varies so little in spite of the great differences in feeding regime. |
format |
Article in Journal/Newspaper |
author |
Steeger, Christoph Esselink, Hans Ydenberg, Ronald C. |
author_facet |
Steeger, Christoph Esselink, Hans Ydenberg, Ronald C. |
author_sort |
Steeger, Christoph |
title |
Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia |
title_short |
Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia |
title_full |
Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia |
title_fullStr |
Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia |
title_full_unstemmed |
Comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern British Columbia |
title_sort |
comparative feeding ecology and reproductive performance of ospreys in different habitats of southeastern british columbia |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/z92-071 http://www.nrcresearchpress.com/doi/pdf/10.1139/z92-071 |
long_lat |
ENVELOPE(62.863,62.863,-67.600,-67.600) |
geographic |
West Arm |
geographic_facet |
West Arm |
genre |
Catostomus catostomus Longnose sucker Pandion haliaetus |
genre_facet |
Catostomus catostomus Longnose sucker Pandion haliaetus |
op_source |
Canadian Journal of Zoology volume 70, issue 3, page 470-475 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z92-071 |
container_title |
Canadian Journal of Zoology |
container_volume |
70 |
container_issue |
3 |
container_start_page |
470 |
op_container_end_page |
475 |
_version_ |
1785580968131690496 |