Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics
The density and productivity of peregrine falcon Falco peregrinus populations correlate positively with distance from the Equator, while habitat specificity increases with proximity to the Equator. Low peregrine densities in the tropics may be a result of competition with similar congeners (e.g. the...
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Format: | Article in Journal/Newspaper |
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Online Access: | http://dx.doi.org/10.1034/j.1600-0587.2001.d01-634.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0587.2001.d01-634.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0587.2001.d01-634.x |
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crwiley:10.1034/j.1600-0587.2001.d01-634.x 2024-06-02T08:02:18+00:00 Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics 2001 http://dx.doi.org/10.1034/j.1600-0587.2001.d01-634.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0587.2001.d01-634.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0587.2001.d01-634.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecography volume 24, issue 3, page 359-367 ISSN 0906-7590 1600-0587 journal-article 2001 crwiley https://doi.org/10.1034/j.1600-0587.2001.d01-634.x 2024-05-03T11:34:57Z The density and productivity of peregrine falcon Falco peregrinus populations correlate positively with distance from the Equator, while habitat specificity increases with proximity to the Equator. Low peregrine densities in the tropics may be a result of competition with similar congeners (e.g. the lanner falcon F. biarmicus in Africa), which replace them in many areas. Alternatively, tropical peregrines may be limited by resource deficiencies that do not affect their close relatives. Data from peregrine and lanner populations in South Africa support the resource deficiency hypothesis, and there is no evidence to suggest direct competition between the two species. In areas where prey are not spatially or temporally concentrated, or otherwise particularly vulnerable to attack, morphological and behavioural specializations of peregrines probably restrict them to optimal foraging conditions. The relative dynamics of Arctic and temperate vs tropical prey populations is suggested as an important factor determining peregrine distribution globally. Populations of other widespread but particularly specialized avian predators (e.g. osprey Pandion haliaetus ) may be similarly controlled. Food limitation (in terms of a dearth of particularly vulnerable prey) in the tropics has resulted in specialization and rarity in peregrines and generalization and relative abundance in similar congeners. Article in Journal/Newspaper Arctic Falco peregrinus peregrine falcon Pandion haliaetus Wiley Online Library Arctic Ecography 24 3 359 367 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The density and productivity of peregrine falcon Falco peregrinus populations correlate positively with distance from the Equator, while habitat specificity increases with proximity to the Equator. Low peregrine densities in the tropics may be a result of competition with similar congeners (e.g. the lanner falcon F. biarmicus in Africa), which replace them in many areas. Alternatively, tropical peregrines may be limited by resource deficiencies that do not affect their close relatives. Data from peregrine and lanner populations in South Africa support the resource deficiency hypothesis, and there is no evidence to suggest direct competition between the two species. In areas where prey are not spatially or temporally concentrated, or otherwise particularly vulnerable to attack, morphological and behavioural specializations of peregrines probably restrict them to optimal foraging conditions. The relative dynamics of Arctic and temperate vs tropical prey populations is suggested as an important factor determining peregrine distribution globally. Populations of other widespread but particularly specialized avian predators (e.g. osprey Pandion haliaetus ) may be similarly controlled. Food limitation (in terms of a dearth of particularly vulnerable prey) in the tropics has resulted in specialization and rarity in peregrines and generalization and relative abundance in similar congeners. |
format |
Article in Journal/Newspaper |
title |
Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics |
spellingShingle |
Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics |
title_short |
Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics |
title_full |
Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics |
title_fullStr |
Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics |
title_full_unstemmed |
Prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics |
title_sort |
prey availability influences habitat tolerance: an explanation for the rarity of peregrine falcons in the tropics |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1034/j.1600-0587.2001.d01-634.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0587.2001.d01-634.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0587.2001.d01-634.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Falco peregrinus peregrine falcon Pandion haliaetus |
genre_facet |
Arctic Falco peregrinus peregrine falcon Pandion haliaetus |
op_source |
Ecography volume 24, issue 3, page 359-367 ISSN 0906-7590 1600-0587 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1034/j.1600-0587.2001.d01-634.x |
container_title |
Ecography |
container_volume |
24 |
container_issue |
3 |
container_start_page |
359 |
op_container_end_page |
367 |
_version_ |
1800746807678992384 |