Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands
Summary The island of Aguiguan is part of the Mariana archipelago and currently supports populations of four endemic species, including one endemic genus, Cleptornis . Bird population trends since 1982 were recently assessed on the neighbouring islands of Saipan, Tinian, and Rota indicating declines...
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crcambridgeupr:10.1017/s0959270914000021 2024-06-23T07:51:48+00:00 Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands AMIDON, FRED CAMP, RICHARD J. MARSHALL, ANN P. PRATT, THANE K. WILLIAMS, LAURA RADLEY, PAUL CRUZ, JUSTINE B. 2014 http://dx.doi.org/10.1017/s0959270914000021 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0959270914000021 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Bird Conservation International volume 24, issue 4, page 505-517 ISSN 0959-2709 1474-0001 journal-article 2014 crcambridgeupr https://doi.org/10.1017/s0959270914000021 2024-05-29T08:09:11Z Summary The island of Aguiguan is part of the Mariana archipelago and currently supports populations of four endemic species, including one endemic genus, Cleptornis . Bird population trends since 1982 were recently assessed on the neighbouring islands of Saipan, Tinian, and Rota indicating declines in some native species. Point-transect surveys were conducted in 2008 by the U.S. Fish and Wildlife Service to assess population densities and trends on Aguiguan. Densities for six of the nine native birds—White-throated Ground-dove Gallicolumba xanthonura , Collared Kingfisher Todiramphus chloris , Rufous Fantail Rhipidura rufifrons , Golden White-eye Cleptornis marchei , Bridled White-eye Zosterops conspicillatus and Micronesian Starling Aplonis opaca —and the non-native bird—Island Collared-dove Streptopelia bitorquata —were significantly greater in 2008 than in 1982. No differences in densities were detected among the surveys for Mariana Fruit-dove Ptilinopus roseicapilla , and Micronesian Myzomela Myzomela rubratra . Three federally and locally listed endangered birds—Nightingale Reed-warbler Acrocephalus luscinius , Mariana Swiftlet Collocalia bartschi , and Micronesian Megapode Megapodius laperous )—were either not detected during the point-transect counts, the surveys were not appropriate for the species, or the numbers of birds detected were too small to estimate densities. The factors behind the increasing trends for some species are unknown but may be related to increased forest cover on the island since 1982. With declining trends for some native species on neighbouring islands, the increasing and stable trends on Aguiguan is good news for forest bird populations in the region, as Aguiguan populations can help support conservation efforts on other islands in the archipelago. Article in Journal/Newspaper Bird Island Cambridge University Press Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) Goat Island ENVELOPE(-55.848,-55.848,52.733,52.733) Bird Conservation International 24 4 505 517 |
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Open Polar |
collection |
Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Summary The island of Aguiguan is part of the Mariana archipelago and currently supports populations of four endemic species, including one endemic genus, Cleptornis . Bird population trends since 1982 were recently assessed on the neighbouring islands of Saipan, Tinian, and Rota indicating declines in some native species. Point-transect surveys were conducted in 2008 by the U.S. Fish and Wildlife Service to assess population densities and trends on Aguiguan. Densities for six of the nine native birds—White-throated Ground-dove Gallicolumba xanthonura , Collared Kingfisher Todiramphus chloris , Rufous Fantail Rhipidura rufifrons , Golden White-eye Cleptornis marchei , Bridled White-eye Zosterops conspicillatus and Micronesian Starling Aplonis opaca —and the non-native bird—Island Collared-dove Streptopelia bitorquata —were significantly greater in 2008 than in 1982. No differences in densities were detected among the surveys for Mariana Fruit-dove Ptilinopus roseicapilla , and Micronesian Myzomela Myzomela rubratra . Three federally and locally listed endangered birds—Nightingale Reed-warbler Acrocephalus luscinius , Mariana Swiftlet Collocalia bartschi , and Micronesian Megapode Megapodius laperous )—were either not detected during the point-transect counts, the surveys were not appropriate for the species, or the numbers of birds detected were too small to estimate densities. The factors behind the increasing trends for some species are unknown but may be related to increased forest cover on the island since 1982. With declining trends for some native species on neighbouring islands, the increasing and stable trends on Aguiguan is good news for forest bird populations in the region, as Aguiguan populations can help support conservation efforts on other islands in the archipelago. |
format |
Article in Journal/Newspaper |
author |
AMIDON, FRED CAMP, RICHARD J. MARSHALL, ANN P. PRATT, THANE K. WILLIAMS, LAURA RADLEY, PAUL CRUZ, JUSTINE B. |
spellingShingle |
AMIDON, FRED CAMP, RICHARD J. MARSHALL, ANN P. PRATT, THANE K. WILLIAMS, LAURA RADLEY, PAUL CRUZ, JUSTINE B. Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands |
author_facet |
AMIDON, FRED CAMP, RICHARD J. MARSHALL, ANN P. PRATT, THANE K. WILLIAMS, LAURA RADLEY, PAUL CRUZ, JUSTINE B. |
author_sort |
AMIDON, FRED |
title |
Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands |
title_short |
Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands |
title_full |
Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands |
title_fullStr |
Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands |
title_full_unstemmed |
Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands |
title_sort |
terrestrial bird population trends on aguiguan (goat island), mariana islands |
publisher |
Cambridge University Press (CUP) |
publishDate |
2014 |
url |
http://dx.doi.org/10.1017/s0959270914000021 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0959270914000021 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) ENVELOPE(-55.848,-55.848,52.733,52.733) |
geographic |
Bird Island Goat Island |
geographic_facet |
Bird Island Goat Island |
genre |
Bird Island |
genre_facet |
Bird Island |
op_source |
Bird Conservation International volume 24, issue 4, page 505-517 ISSN 0959-2709 1474-0001 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0959270914000021 |
container_title |
Bird Conservation International |
container_volume |
24 |
container_issue |
4 |
container_start_page |
505 |
op_container_end_page |
517 |
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1802642933693808640 |