Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona
We determined food habits of Red-tailed Hawks (Buteo jamaicensis) for comparison with published information for Northern Goshawks (Accipiter gentilis) to evaluate potential competition oil the Kaibab Plateau, Arizona. We collected prey remains and pellets from 42 Red-tailed Hawk nests at the end of...
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ftnortharizonaun:oai:openknowledge.nau.edu:985 2023-05-15T13:00:39+02:00 Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona Gatto, Angela E. Grubb, Teryl G. Chambers, Carol L. 2005 text http://openknowledge.nau.edu/985/ http://openknowledge.nau.edu/985/7/Gatto_A_etal_2005_Red-tailed_hawk_dietary_overlap.pdf en eng http://openknowledge.nau.edu/985/7/Gatto_A_etal_2005_Red-tailed_hawk_dietary_overlap.pdf Gatto, Angela E. and Grubb, Teryl G. and Chambers, Carol L. (2005) Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona. Journal of Raptor Research, 39 (4). pp. 439-444. ISSN 0892-1016 QL Zoology Article PeerReviewed 2005 ftnortharizonaun 2020-12-11T11:43:45Z We determined food habits of Red-tailed Hawks (Buteo jamaicensis) for comparison with published information for Northern Goshawks (Accipiter gentilis) to evaluate potential competition oil the Kaibab Plateau, Arizona. We collected prey remains and pellets from 42 Red-tailed Hawk nests at the end of the nesting season between August-October 1998-2001, and opportunistically front below nest trees during site visits, May-July 2000-01. We identified 478 prey items, including 17 mammal, 7 bird, and 2 reptile species. Prey species frequency did not, vary among years (P = 0.3), across habitat types (P = 0.8), or by collection technique (P = 0.4). Annual food niche breadth for Red-tailed Hawks averaged 0.57. Published mean niche breadth for Northern Goshawks was 0.32, supporting that Red-tailed Hawks were feeding generalists, while Northern Goshawks were more specialized. However, 48% of Red-tailed Hawk diet. on the Kaibab Plateau consisted of species comprising a major portion of the documented diet of Northern Goshawks, including Nuttall's cottontail (Sylvilagus nuttallii), golden-mantled ground squirrel (Spermophilus lateralis lateralis), rock squirrel (S. variegates grammurus), and Northern Flicker (Colaples auratus). Because raptor communities with high dietary overlap and lack of prey partitioning show food-limited nesting success, greater agnonistic behavior, and territoriality, Red-tailed Hawks could be negatively affecting Northern Goshawks on the Kaibab Plateau. Article in Journal/Newspaper Accipiter gentilis OpenKnowledge@NAU (Northern Arizona University, Flagstaff) |
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OpenKnowledge@NAU (Northern Arizona University, Flagstaff) |
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ftnortharizonaun |
language |
English |
topic |
QL Zoology |
spellingShingle |
QL Zoology Gatto, Angela E. Grubb, Teryl G. Chambers, Carol L. Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona |
topic_facet |
QL Zoology |
description |
We determined food habits of Red-tailed Hawks (Buteo jamaicensis) for comparison with published information for Northern Goshawks (Accipiter gentilis) to evaluate potential competition oil the Kaibab Plateau, Arizona. We collected prey remains and pellets from 42 Red-tailed Hawk nests at the end of the nesting season between August-October 1998-2001, and opportunistically front below nest trees during site visits, May-July 2000-01. We identified 478 prey items, including 17 mammal, 7 bird, and 2 reptile species. Prey species frequency did not, vary among years (P = 0.3), across habitat types (P = 0.8), or by collection technique (P = 0.4). Annual food niche breadth for Red-tailed Hawks averaged 0.57. Published mean niche breadth for Northern Goshawks was 0.32, supporting that Red-tailed Hawks were feeding generalists, while Northern Goshawks were more specialized. However, 48% of Red-tailed Hawk diet. on the Kaibab Plateau consisted of species comprising a major portion of the documented diet of Northern Goshawks, including Nuttall's cottontail (Sylvilagus nuttallii), golden-mantled ground squirrel (Spermophilus lateralis lateralis), rock squirrel (S. variegates grammurus), and Northern Flicker (Colaples auratus). Because raptor communities with high dietary overlap and lack of prey partitioning show food-limited nesting success, greater agnonistic behavior, and territoriality, Red-tailed Hawks could be negatively affecting Northern Goshawks on the Kaibab Plateau. |
format |
Article in Journal/Newspaper |
author |
Gatto, Angela E. Grubb, Teryl G. Chambers, Carol L. |
author_facet |
Gatto, Angela E. Grubb, Teryl G. Chambers, Carol L. |
author_sort |
Gatto, Angela E. |
title |
Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona |
title_short |
Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona |
title_full |
Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona |
title_fullStr |
Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona |
title_full_unstemmed |
Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona |
title_sort |
red-tailed hawk dietary overlap with northern goshawks on the kaibab plateau, arizona |
publishDate |
2005 |
url |
http://openknowledge.nau.edu/985/ http://openknowledge.nau.edu/985/7/Gatto_A_etal_2005_Red-tailed_hawk_dietary_overlap.pdf |
genre |
Accipiter gentilis |
genre_facet |
Accipiter gentilis |
op_relation |
http://openknowledge.nau.edu/985/7/Gatto_A_etal_2005_Red-tailed_hawk_dietary_overlap.pdf Gatto, Angela E. and Grubb, Teryl G. and Chambers, Carol L. (2005) Red-tailed hawk dietary overlap with Northern Goshawks on the Kaibab Plateau, Arizona. Journal of Raptor Research, 39 (4). pp. 439-444. ISSN 0892-1016 |
_version_ |
1766256639212519424 |