Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information
Abstract How the allocation of searching investiment by Ural owls ( Strix uralensis ) in a patchy and fluctuating environment is affected by prior information was experimentally studied. The owls searched among four patches, two with prey and two without prey. During the five days, the positions of...
Published in: | Ecological Research |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1988
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1007/bf02348589 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1007%2FBF02348589 http://onlinelibrary.wiley.com/wol1/doi/10.1007/BF02348589/fullpdf |
id |
crwiley:10.1007/bf02348589 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1007/bf02348589 2023-12-03T10:30:51+01:00 Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information Nishimura, Kinya 1988 http://dx.doi.org/10.1007/bf02348589 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1007%2FBF02348589 http://onlinelibrary.wiley.com/wol1/doi/10.1007/BF02348589/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecological Research volume 3, issue 3, page 319-332 ISSN 0912-3814 1440-1703 Ecology, Evolution, Behavior and Systematics journal-article 1988 crwiley https://doi.org/10.1007/bf02348589 2023-11-09T13:55:18Z Abstract How the allocation of searching investiment by Ural owls ( Strix uralensis ) in a patchy and fluctuating environment is affected by prior information was experimentally studied. The owls searched among four patches, two with prey and two without prey. During the five days, the positions of two prey patches were randomly assigned daily (random treatment) and for the other five days, they were fixed (fixed treatment). In experiment I, the sequence of treatments was from random to fixed. In experiment II, the sequence of treatments was reversed. The choice of prey present patch was affected by acquired information which owls acquired during one night (short term), a treatment period (medium term), and throughout the experiment run (long term). They predicted the positions of the prey patches, to some extent, in the first choice in one night in the fixed treatment by the experience of previous days. The searching time per visit was also affected by previous information. Owls searched prey patches longer than empty patches. In the random treatment, the giving up time in prey patches was variable, while in the fixed treatment, it was longer and fixed. Although owls could use information on the environment where they had searched to make a decision of foraging behavior, they were not able to choose prey patches accurately. The information which was acquired during the treatment period and throughout the experiment run affected the gain from prey. The changes in gain were not caused by the encounter rate but by the proportion of attack success. Article in Journal/Newspaper Strix uralensis Wiley Online Library (via Crossref) Ecological Research 3 3 319 332 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Nishimura, Kinya Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
Abstract How the allocation of searching investiment by Ural owls ( Strix uralensis ) in a patchy and fluctuating environment is affected by prior information was experimentally studied. The owls searched among four patches, two with prey and two without prey. During the five days, the positions of two prey patches were randomly assigned daily (random treatment) and for the other five days, they were fixed (fixed treatment). In experiment I, the sequence of treatments was from random to fixed. In experiment II, the sequence of treatments was reversed. The choice of prey present patch was affected by acquired information which owls acquired during one night (short term), a treatment period (medium term), and throughout the experiment run (long term). They predicted the positions of the prey patches, to some extent, in the first choice in one night in the fixed treatment by the experience of previous days. The searching time per visit was also affected by previous information. Owls searched prey patches longer than empty patches. In the random treatment, the giving up time in prey patches was variable, while in the fixed treatment, it was longer and fixed. Although owls could use information on the environment where they had searched to make a decision of foraging behavior, they were not able to choose prey patches accurately. The information which was acquired during the treatment period and throughout the experiment run affected the gain from prey. The changes in gain were not caused by the encounter rate but by the proportion of attack success. |
format |
Article in Journal/Newspaper |
author |
Nishimura, Kinya |
author_facet |
Nishimura, Kinya |
author_sort |
Nishimura, Kinya |
title |
Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information |
title_short |
Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information |
title_full |
Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information |
title_fullStr |
Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information |
title_full_unstemmed |
Foraging behavior of Ural owls ( Strix uralensis ) in a patchy environment: The importance of acquired information |
title_sort |
foraging behavior of ural owls ( strix uralensis ) in a patchy environment: the importance of acquired information |
publisher |
Wiley |
publishDate |
1988 |
url |
http://dx.doi.org/10.1007/bf02348589 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1007%2FBF02348589 http://onlinelibrary.wiley.com/wol1/doi/10.1007/BF02348589/fullpdf |
genre |
Strix uralensis |
genre_facet |
Strix uralensis |
op_source |
Ecological Research volume 3, issue 3, page 319-332 ISSN 0912-3814 1440-1703 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1007/bf02348589 |
container_title |
Ecological Research |
container_volume |
3 |
container_issue |
3 |
container_start_page |
319 |
op_container_end_page |
332 |
_version_ |
1784256902425739264 |