Chronic lack of breeding by Galápagos Blue-footed Boobies and associated population decline. (Registro nro. 13049)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04517nab a22003617a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EC-PaCDF |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20171204155810.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 170721t20142014xxu|||||||||||||||||eng|| |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | EC-PaCDF |
| 041 ## - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Edition number | 21 |
| Classification number | 598.43 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Anchundia, David. |
| 245 10 - TITLE STATEMENT | |
| Title | Chronic lack of breeding by Galápagos Blue-footed Boobies and associated population decline. |
| 520 0# - SUMMARY, ETC. | |
| Summary, etc. | A survey of Blue-footed Boobies (Sula nebouxii excisa) throughout the taxon’s range in Galápagos, Ecuador found ~6400 adults, compared to a rough estimate of 20,000 in the 1960s. Few pairs bred in 2011-2013 and almost no birds in juvenile plumage were seen. Long-term data suggest that poor breeding began in 1998. Lack of recruitment over this period would mean that the current population is mostly elderly and experiencing senescent decline in performance. Anthropogenic effects such as introduced predators are unlikely to explain this decline because islands with and without such factors exhibited the same low breeding. The poor reproduction seems to be linked to diet. Previous work indicated that sardine and herring (Clupeidae) supported successful breeding, but these fish were mostly absent from the diet during this study, except in the central part of Galápagos, where most breeding attempts during this study occurred. Elsewhere in the eastern Pacific sardine abundance has decreased dramatically by natural processes in the last 15 years, as part of a well-documented and apparently natural cycle. This cyclic change in abundance provides a possible explanation for the recent demographic changes in Blue-footed Boobies in Galápagos. Whether natural or anthropogenic in origin, the implications of senescent decline in breeding ability and survival are dramatic for this genetically distinct icon of biodiversity and ecotourism. |
| 520 0# - SUMMARY, ETC. | |
| Summary, etc. | Un inventaire du Fou à pieds bleus (Sula nebouxii excisa) dans l’ensemble de l’aire occupée aux Galápagos, en Équateur, fait état d’~6 400 adultes, comparativement aux ~20 000 estimés grossièrement dans les années 1960. Seulement quelques couples se sont reproduits en 2011-2013 et presque aucun oiseau en plumage juvénile n’a été observé. Les données à long terme indiquent que la reproduction est mauvaise depuis 1998. Le manque de recrutement durant la période 1998-2013 laisse supposer que la population actuelle serait surtout constituée de vieux individus aux performances reproductrices déclinantes en raison du phénomène de sénescence. Les causes de source anthropique, comme les prédateurs introduits, n’expliquent vraisemblablement pas ce déclin, car toutes les îles, avec ou sans prédateurs, présentent le même faible taux de reproduction. Ce faible taux semble plutôt lié à l’alimentation. Ainsi, des études antérieures ont révélé que les sardines et les harengs (Clupeidae) constituaient la base de l’alimentation d’individus s’étant reproduits avec succès dans le passé; or, ces poissons étaient pratiquement absents de l’alimentation des fous lors de notre étude, hormis dans le centre des Galápagos où la plupart des tentatives de reproduction se sont produites. Ailleurs dans l’est du Pacifique, le nombre de sardines a diminué dramatiquement durant les quinze dernières années, selon un cycle bien documenté et apparemment naturel. Il est donc possible que ce changement cyclique de l’abondance des poissons soit responsable des changements démographiques récents observés chez le Fou à pieds bleus des Galápagos. Qu’elles soient de source naturelle ou anthropique, les répercussions du déclin des capacités de reproduction et de la survie des individus attribuables à la sénescence sont désastreuses pour cette icône de la biodiversité et de l’écotourisme génétiquement distincte. |
| 546 ## - LANGUAGE NOTE | |
| Language note | English |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Galápagos. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Population cycle. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Ciclo poblacional. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Population decline. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Disminución de la población. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Sardine-anchovy cycle. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Ciclo sardina-anchoa. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Seabird conservation. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Conservación de aves marinas. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Sulid. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Sulido. |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Huyvaert, Kathryn P. |
| 9 (RLIN) | 322 |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Anderson, David J. |
| 9 (RLIN) | 1399 |
| 773 0# - HOST ITEM ENTRY | |
| Related parts | Vol. 9, no. 1 (2014), p. 1-16 |
| Title | Avian Conservation and Ecology. |
| 856 0# - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://dx.doi.org/10.5751/ACE-00650-090106 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Artículo |
| Withdrawn status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Total Checkouts | Total Renewals | Full call number | Barcode | Date last seen | Date last checked out | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | Galápagos | Corley Smith Library | Corley Smith Library | Artículos | 21/07/2017 | 1 | 1 | 598.43 ANC | 2017-2135 | 13/03/2018 | 19/12/2017 | 21/07/2017 | Artículo | |||
| Dewey Decimal Classification | Galápagos | Corley Smith Library | Corley Smith Library | Colección PDF | 21/07/2017 | 598.43 ANC 2014 | 2021-1927 | 21/07/2017 | 21/07/2017 | Documento electrónico |