Island accessibility and distance from beach influence nesting success of Sooty Falcons Falco concolor in Oman

Michael J. Mcgrady, Waheed Al Fazari, Mansoor Al Jahdhami, Martin Fisher, Andrews Kwarteng, Hartmut Walter, Madan K. Oli

Research output: Contribution to journalArticle

Abstract

Colonial island-breeding birds can be particularly vulnerable to anthropogenic disturbance, which can adversely affect their nesting success. We studied Sooty Falcons Falco concolor breeding on 10 ground-predator-free islands in the Sea of Oman during 2007–2014 and evaluated spatio-temporal trends in the number of breeding pairs occurring on the islands and the factors influencing nesting success. The number of breeding pairs on the islands declined during the study, due mostly to the decline on accessible islands; the rate of decline on islands accessible to humans was double that on inaccessible ones. The number of nests with one or more eggs declined during the study period, and the percentage of nests with eggs that produced one or more chicks showed an increasing trend over time. Sooty Falcon nests located farther away from beaches experienced a significantly higher probability of nesting success than those located closer to beaches. Our results suggest that the number of breeding Sooty Falcons on the islands of northern Oman is declining and that human disturbance may be a contributing factor; this probably mirrors the situation in other parts of the breeding range of this species.

Original languageEnglish
Pages (from-to)162-171
Number of pages10
JournalIbis
Volume161
Issue number1
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

nesting success
falcons
Oman
Falco
accessibility
beaches
beach
breeding
nest
nests
egg
disturbance
anthropogenic activities
chicks
predator
predators
birds

Keywords

  • breeding pairs
  • human disturbance
  • island area
  • nest failure
  • reproductive success

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Mcgrady, M. J., Al Fazari, W., Al Jahdhami, M., Fisher, M., Kwarteng, A., Walter, H., & Oli, M. K. (2019). Island accessibility and distance from beach influence nesting success of Sooty Falcons Falco concolor in Oman. Ibis, 161(1), 162-171. https://doi.org/10.1111/ibi.12601

Island accessibility and distance from beach influence nesting success of Sooty Falcons Falco concolor in Oman. / Mcgrady, Michael J.; Al Fazari, Waheed; Al Jahdhami, Mansoor; Fisher, Martin; Kwarteng, Andrews; Walter, Hartmut; Oli, Madan K.

In: Ibis, Vol. 161, No. 1, 01.01.2019, p. 162-171.

Research output: Contribution to journalArticle

Mcgrady, MJ, Al Fazari, W, Al Jahdhami, M, Fisher, M, Kwarteng, A, Walter, H & Oli, MK 2019, 'Island accessibility and distance from beach influence nesting success of Sooty Falcons Falco concolor in Oman', Ibis, vol. 161, no. 1, pp. 162-171. https://doi.org/10.1111/ibi.12601
Mcgrady, Michael J. ; Al Fazari, Waheed ; Al Jahdhami, Mansoor ; Fisher, Martin ; Kwarteng, Andrews ; Walter, Hartmut ; Oli, Madan K. / Island accessibility and distance from beach influence nesting success of Sooty Falcons Falco concolor in Oman. In: Ibis. 2019 ; Vol. 161, No. 1. pp. 162-171.
@article{42847f50cbc44f8ea192922df6abaa9b,
title = "Island accessibility and distance from beach influence nesting success of Sooty Falcons Falco concolor in Oman",
abstract = "Colonial island-breeding birds can be particularly vulnerable to anthropogenic disturbance, which can adversely affect their nesting success. We studied Sooty Falcons Falco concolor breeding on 10 ground-predator-free islands in the Sea of Oman during 2007–2014 and evaluated spatio-temporal trends in the number of breeding pairs occurring on the islands and the factors influencing nesting success. The number of breeding pairs on the islands declined during the study, due mostly to the decline on accessible islands; the rate of decline on islands accessible to humans was double that on inaccessible ones. The number of nests with one or more eggs declined during the study period, and the percentage of nests with eggs that produced one or more chicks showed an increasing trend over time. Sooty Falcon nests located farther away from beaches experienced a significantly higher probability of nesting success than those located closer to beaches. Our results suggest that the number of breeding Sooty Falcons on the islands of northern Oman is declining and that human disturbance may be a contributing factor; this probably mirrors the situation in other parts of the breeding range of this species.",
keywords = "breeding pairs, human disturbance, island area, nest failure, reproductive success",
author = "Mcgrady, {Michael J.} and {Al Fazari}, Waheed and {Al Jahdhami}, Mansoor and Martin Fisher and Andrews Kwarteng and Hartmut Walter and Oli, {Madan K.}",
year = "2019",
month = "1",
day = "1",
doi = "10.1111/ibi.12601",
language = "English",
volume = "161",
pages = "162--171",
journal = "Ibis",
issn = "0019-1019",
publisher = "Wiley-Blackwell",
number = "1",

}

TY - JOUR

T1 - Island accessibility and distance from beach influence nesting success of Sooty Falcons Falco concolor in Oman

AU - Mcgrady, Michael J.

AU - Al Fazari, Waheed

AU - Al Jahdhami, Mansoor

AU - Fisher, Martin

AU - Kwarteng, Andrews

AU - Walter, Hartmut

AU - Oli, Madan K.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Colonial island-breeding birds can be particularly vulnerable to anthropogenic disturbance, which can adversely affect their nesting success. We studied Sooty Falcons Falco concolor breeding on 10 ground-predator-free islands in the Sea of Oman during 2007–2014 and evaluated spatio-temporal trends in the number of breeding pairs occurring on the islands and the factors influencing nesting success. The number of breeding pairs on the islands declined during the study, due mostly to the decline on accessible islands; the rate of decline on islands accessible to humans was double that on inaccessible ones. The number of nests with one or more eggs declined during the study period, and the percentage of nests with eggs that produced one or more chicks showed an increasing trend over time. Sooty Falcon nests located farther away from beaches experienced a significantly higher probability of nesting success than those located closer to beaches. Our results suggest that the number of breeding Sooty Falcons on the islands of northern Oman is declining and that human disturbance may be a contributing factor; this probably mirrors the situation in other parts of the breeding range of this species.

AB - Colonial island-breeding birds can be particularly vulnerable to anthropogenic disturbance, which can adversely affect their nesting success. We studied Sooty Falcons Falco concolor breeding on 10 ground-predator-free islands in the Sea of Oman during 2007–2014 and evaluated spatio-temporal trends in the number of breeding pairs occurring on the islands and the factors influencing nesting success. The number of breeding pairs on the islands declined during the study, due mostly to the decline on accessible islands; the rate of decline on islands accessible to humans was double that on inaccessible ones. The number of nests with one or more eggs declined during the study period, and the percentage of nests with eggs that produced one or more chicks showed an increasing trend over time. Sooty Falcon nests located farther away from beaches experienced a significantly higher probability of nesting success than those located closer to beaches. Our results suggest that the number of breeding Sooty Falcons on the islands of northern Oman is declining and that human disturbance may be a contributing factor; this probably mirrors the situation in other parts of the breeding range of this species.

KW - breeding pairs

KW - human disturbance

KW - island area

KW - nest failure

KW - reproductive success

UR - http://www.scopus.com/inward/record.url?scp=85059574930&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059574930&partnerID=8YFLogxK

U2 - 10.1111/ibi.12601

DO - 10.1111/ibi.12601

M3 - Article

VL - 161

SP - 162

EP - 171

JO - Ibis

JF - Ibis

SN - 0019-1019

IS - 1

ER -