ArticlePloS one2013
Individual foraging strategies reveal niche overlap between endangered galapagos pinnipeds.
Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 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
15 citing papers in PubMed, 47 citations in OpenAlex.
- Individual Specialization in a Generalist Apex Predator: The Leopard Seal.Ecology and evolution · 2025Article
- Niche partitioning and individual specialisation in resources and space use of sympatric fur seals at their range margin.Oecologia · 2024Article
- DNA-metabarcoding supports trophic flexibility and reveals new prey species for the Galapagos sea lion.Ecology and evolution · 2024Article
- California sea lions interfere with striped marlin hunting behaviour in multi-species predator aggregations.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Article
- Feeding morphology and body size shape resource partitioning in an eared seal community.Biology letters · 2023Article
- Lower marine productivity increases agonistic interactions between sea lions and fur seals in Northern Pacific Patagonia.Current zoology · 2022Article
- Population Genetics and Phylogeography of Galapagos Fur Seals.Frontiers in genetics · 2022Article
- Declines and recovery in endangered Galapagos pinnipeds during the El Niño event.Scientific reports · 2021Article
- Article
- Olfaction at depth: Cribriform plate size declines with dive depth and duration in aquatic arctoid carnivorans.Ecology and evolution · 2020Article
- Diving deep into trouble: the role of foraging strategy and morphology in adapting to a changing environment.Conservation physiology · 2020Article
- The energetic consequences of behavioral variation in a marine carnivore.Ecology and evolution · 2018Article
- Intraspecific variation in feeding strategies of Galapagos sea lions: A case of trophic specialization.PloS one · 2017Article
- Foraging strategies of a generalist marine predator inhabiting a dynamic environment.Oecologia · 2016Article
- Stable Isotopes Reveal Long-Term Fidelity to Foraging Grounds in the Galapagos Sea Lion (Zalophus wollebaeki).PloS one · 2016Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Most competition studies between species are conducted from a population-level approach. Few studies have examined inter-specific competition in conjunction with intra-specific competition, with an individual-based approach. To our knowledge, none has been conducted on marine top predators. Sympatric Galapagos fur seals (Arctocephalus galapagoensis) and sea lions (Zalophus wollebaeki) share similar geographic habitats and potentially compete. We studied their foraging niche overlap at Cabo Douglas, Fernandina Island from simultaneously collected dive and movement data to examine spatial and temporal inter- and intra-specific competition. Sea lions exhibited 3 foraging strategies (shallow, intermediate and deep) indicating intra-specific competition. Fur seals exhibited one foraging strategy, diving predominantly at night, between 0-80 m depth and mostly at 19-22 h. Most sea lion dives also occurred at night (63%), between 0-40 m, within fur seals' diving depth range. 34% of sea lions night dives occurred at 19-22 h, when fur seals dived the most, but most of them occurred at dawn and dusk, when fur seals exhibited the least amount of dives. Fur seals and sea lions foraging behavior overlapped at 19 and 21 h between 0-30 m depths. Sea lions from the deep diving strategy exhibited the greatest foraging overlap with fur seals, in time (19 h), depth during overlapping time (21-24 m), and foraging range (37.7%). Fur seals foraging range was larger. Cabo Douglas northwest coastal area, region of highest diving density, is a foraging "hot spot" for both species. Fur seals and sea lions foraging niche overlap occurred, but segregation also occurred; fur seals primarily dived at night, while sea lions exhibited night and day diving. Both species exploited depths and areas exclusive to their species. Niche breadth generally increases with environmental uncertainty and decreased productivity. Potential competition between these species could be greater during warmer periods when prey availability is reduced.
Indexed as
Identifiers
What 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.