ArticleOecologia2006
Using behavioural and state variables to identify proximate causes of population change in a seabird.
Article in Oecologia, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
13 citing papers in PubMed.
- Spatial segregation and bycatch risk as potential drivers of population trends of wandering albatrosses at South Georgia.Conservation biology : the journal of the Society for Conservation Biology · 2026Article
- Article
- Multivariate signals of population collapse in a high-throughput ecological experiment.Ecology · 2025Article
- Northern Gannet foraging trip length increases with colony size and decreases with latitude.Royal Society open science · 2024Article
- Oceanic thermal structure mediates dive sequences in a foraging seabird.Ecology and evolution · 2020Article
- Weathering a Dynamic Seascape: Influences of Wind and Rain on a Seabird's Year-Round Activity Budgets.PloS one · 2015Article
- Breeding short-tailed shearwaters buffer local environmental variability in south-eastern Australia by foraging in Antarctic waters.Movement ecology · 2015Article
- Article
- Article
- Sympatric breeding auks shift between dietary and spatial resource partitioning across the annual cycle.PloS one · 2013Article
- Reproductive declines in an endangered seabird: cause for concern or signs of conservation success?PloS one · 2011Article
- The cost of male aggression and polygyny in California sea lions (Zalophus californianus).PloS one · 2010Article
- Predicting synergistic effects of resources and predators on foraging decisions by juvenile Steller sea lions.Oecologia · 2009Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Changes in animal population size are driven by the interactions between intrinsic processes and extrinsic forces, and identifying the proximate mechanisms behind population change remains a fundamental question in ecology. Here we report on how measuring behavioural and state proxies of food availability among populations experiencing different growth rates can be used to rapidly identify proximate drivers of population trends. In recent decades, the Cape gannet Morus capensis has shown a major distributional shift with historically large colonies in Namibia decreasing rapidly, whilst numbers at South African colonies have increased, suggesting contrasting environmental conditions in the two regions. We compared per capita growth rates of five of the six extant colonies with foraging range (using miniaturised Global Positioning System loggers), foraging work rate, food delivery rates and body condition of breeding adults. We found significant associations between the rate of population change, individual behaviour, energetic gain and body condition that indicate that recent population changes are associated with extrinsic effects. This study shows that behavioural and state data can be used to identify important drivers of population change, and their cost-effectiveness ensures that they are an appealing option for measuring the health of animal populations in numerous situations.
Indexed as
Identifiers
16323013What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.