Although several studies have described age-speciWc pattern of breeding performance, physiological and endocrine mechanisms underly-ing the variation in reproductive success in relation to age are poorly understood. We described baseline levels of: (1) corticosterone, which can trigger nest desertio...
Other Authors: | |
---|---|
Format: | Text |
Language: | English |
Published: |
2006
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.6735 http://bio.research.ucsc.edu/people/costa/PDFs/Pubs/Angelier2006GenCompEndocr149.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.487.6735 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.487.6735 2023-05-15T16:00:54+02:00 The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.6735 http://bio.research.ucsc.edu/people/costa/PDFs/Pubs/Angelier2006GenCompEndocr149.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.6735 http://bio.research.ucsc.edu/people/costa/PDFs/Pubs/Angelier2006GenCompEndocr149.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://bio.research.ucsc.edu/people/costa/PDFs/Pubs/Angelier2006GenCompEndocr149.pdf Age Breeding experience Senescence Parental expenditure Corticosterone Prolactin Long-lived bird Wandering albatross Diomedea exulans text 2006 ftciteseerx 2016-01-08T08:17:11Z Although several studies have described age-speciWc pattern of breeding performance, physiological and endocrine mechanisms underly-ing the variation in reproductive success in relation to age are poorly understood. We described baseline levels of: (1) corticosterone, which can trigger nest desertion when secreted at high levels, and (2) prolactin, a hormone known to trigger parental behaviour in incubating known-aged (7–39 years old) wandering albatrosses (Diomedea exulans). In this long-lived species, reproductive performance increases with age and breeding experience before it stabilizes in middle-aged individuals and declines in senescent individuals. We found that breeding experience was a much better statistical predictor of hormone levels than age. Baseline corticosterone levels slightly increased with advancing experience and reached maximal levels about the sixth breeding attempt. Similarly, prolactin levels were positively correlated with breeding experience in males. No such relationship was found in females, but Wrst-time breeding females had lower prolactin levels than experienced females. This parallel increases in hormonal levels with advancing experience could result from improvements of skills, development of an endocrine system adapted to energetic constraints of reproduction or may mirror a higher investment in reproduction. Corticosterone levels decreased in senescent birds, but such a decline was not observed for prolactin. Low corticosterone levels in senescent birds could be associ-ated with a lower ability to secrete/sustain elevated corticosterone levels or with a decreased parental expenditure. Text Diomedea exulans Wandering Albatross Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Age Breeding experience Senescence Parental expenditure Corticosterone Prolactin Long-lived bird Wandering albatross Diomedea exulans |
spellingShingle |
Age Breeding experience Senescence Parental expenditure Corticosterone Prolactin Long-lived bird Wandering albatross Diomedea exulans |
topic_facet |
Age Breeding experience Senescence Parental expenditure Corticosterone Prolactin Long-lived bird Wandering albatross Diomedea exulans |
description |
Although several studies have described age-speciWc pattern of breeding performance, physiological and endocrine mechanisms underly-ing the variation in reproductive success in relation to age are poorly understood. We described baseline levels of: (1) corticosterone, which can trigger nest desertion when secreted at high levels, and (2) prolactin, a hormone known to trigger parental behaviour in incubating known-aged (7–39 years old) wandering albatrosses (Diomedea exulans). In this long-lived species, reproductive performance increases with age and breeding experience before it stabilizes in middle-aged individuals and declines in senescent individuals. We found that breeding experience was a much better statistical predictor of hormone levels than age. Baseline corticosterone levels slightly increased with advancing experience and reached maximal levels about the sixth breeding attempt. Similarly, prolactin levels were positively correlated with breeding experience in males. No such relationship was found in females, but Wrst-time breeding females had lower prolactin levels than experienced females. This parallel increases in hormonal levels with advancing experience could result from improvements of skills, development of an endocrine system adapted to energetic constraints of reproduction or may mirror a higher investment in reproduction. Corticosterone levels decreased in senescent birds, but such a decline was not observed for prolactin. Low corticosterone levels in senescent birds could be associ-ated with a lower ability to secrete/sustain elevated corticosterone levels or with a decreased parental expenditure. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.6735 http://bio.research.ucsc.edu/people/costa/PDFs/Pubs/Angelier2006GenCompEndocr149.pdf |
genre |
Diomedea exulans Wandering Albatross |
genre_facet |
Diomedea exulans Wandering Albatross |
op_source |
http://bio.research.ucsc.edu/people/costa/PDFs/Pubs/Angelier2006GenCompEndocr149.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.6735 http://bio.research.ucsc.edu/people/costa/PDFs/Pubs/Angelier2006GenCompEndocr149.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766396914962530304 |