| Title |
Annual adult survival of Least Auklets (Aves, Alcidae) varies with large-scale climatic conditions of the North Pacific Ocean
|
|---|---|
| Published in |
Oecologia, September 2002
|
| DOI | 10.1007/s00442-002-0991-8 |
| Pubmed ID | |
| Authors |
Ian L. Jones, Fiona M. Hunter, Gregory J. Robertson |
| Abstract |
We evaluated whether annual adult survival of Least Auklets (Aethia pusilla), a small planktivorous seabird, covaried with large-scale oceanographic conditions in the North Pacific ocean during 1990-2000. Adult Least Auklets (n=358 total) were captured near their nest sites, marked with plastic color bands, and survival estimates were based on color band resightings at their breeding colony. Survival estimates and relationships between survival and three large-scale indices of climatic conditions that correlate with oceanography: the Pacific Decadal Oscillation Index (PDO), Aleutian Low Pressure Index (ALPI), and North Pacific Index (NPI) were evaluated using program MARK. The best models included: (1) two groups of birds, defined by ease of resighting, that differed in recapture rate (p) but not survival rate (φ); and (2) models that allowed for survival rates to differ in the year immediately after first capture from all subsequent years (structurally an age-model). Both of these model structures effectively explained (i.e. removed) sources of heterogeneity in the data set. For Least Auklet survival, the best fitting model was a two-age model incorporating the covariate NPI (average value for the period auklets were at sea, August - April), [φ(age1, age2×NPI), p(g)]. The annual survival rate varied from 0.747±0.075 SE in 1992-1993 to 0.953±0.052 in 1991-1992 (based on the model [φ(age1, age2×t), p(g)]) and averaged 0.873±0.037 over the study period. Least Auklet annual survival covaried with continuous variation in large-scale climatic conditions. Our results point to oceanographic conditions that relate to climate change as crucial to the status of auklet populations, notwithstanding conservation measures taken to control introduced predators, oil spills, human disturbance and other anthropogenic sources of mortality. |
Mendeley readers
The data shown below were compiled from readership statistics for 103 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 7 | 7% |
| France | 1 | <1% |
| Brazil | 1 | <1% |
| Germany | 1 | <1% |
| India | 1 | <1% |
| Sweden | 1 | <1% |
| Romania | 1 | <1% |
| Mexico | 1 | <1% |
| Unknown | 89 | 86% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 33 | 32% |
| Student > Ph. D. Student | 27 | 26% |
| Student > Master | 12 | 12% |
| Student > Bachelor | 4 | 4% |
| Professor > Associate Professor | 4 | 4% |
| Other | 14 | 14% |
| Unknown | 9 | 9% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 69 | 67% |
| Environmental Science | 17 | 17% |
| Social Sciences | 2 | 2% |
| Business, Management and Accounting | 1 | <1% |
| Unspecified | 1 | <1% |
| Other | 2 | 2% |
| Unknown | 11 | 11% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 January 2007.
All research outputs
#7,442,740
of 22,751,628 outputs
Outputs from Oecologia
#1,670
of 4,208 outputs
Outputs of similar age
#15,335
of 45,611 outputs
Outputs of similar age from Oecologia
#2
of 13 outputs
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