Evidence map›Paper›PMID 30992478›Full record

ArticleScientific reports2019

Killer whales redistribute white shark foraging pressure on seals.

Salvador J Jorgensen, Scot Anderson, Francesco Ferretti, James R Tietz, Taylor Chapple, Paul Kanive, Russell W Bradley, Jerry H Moxley, Barbara A Block

Abstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed.

  1. Behavioral Evidence for a Chemical Disturbance Cue in Bat Rays (Myliobatis californica).Journal of experimental zoology. Part A, Ecological and integrative physiology · 2026
    Article
  2. Article
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  4. Article
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  6. Article
  7. Article
  8. The extinct sharkScience advances · 2022
    Article
  9. Article
  10. Killer whale presence drives bowhead whale selection for sea ice in Arctic seascapes of fear.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  11. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Salvador J JorgensenMonterey Bay Aquarium, 886 Cannery Row, Monterey, CA, 93940, USA. sjorgensen@mbayaq.org.
Scot AndersonMonterey Bay Aquarium, 886 Cannery Row, Monterey, CA, 93940, USA.
Francesco FerrettiDepartment of Biology, Stanford University Pacific Grove, California, 93950, USA.
James R TietzPoint Blue Conservation Science, 3820 Cypress Drive #11, Petaluma, CA, 94954, USA.
Taylor ChappleDepartment of Biology, Stanford University Pacific Grove, California, 93950, USA.
Paul KaniveMonterey Bay Aquarium, 886 Cannery Row, Monterey, CA, 93940, USA.
Russell W BradleyPoint Blue Conservation Science, 3820 Cypress Drive #11, Petaluma, CA, 94954, USA.
Jerry H MoxleyMonterey Bay Aquarium, 886 Cannery Row, Monterey, CA, 93940, USA.ORCID http://orcid.org/0000-0001-5571-0403
Barbara A BlockDepartment of Biology, Stanford University Pacific Grove, California, 93950, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Predatory behavior and top-down effects in marine ecosystems are well-described, however, intraguild interactions among co-occurring marine top predators remain less understood, but can have far reaching ecological implications. Killer whales and white sharks are prominent upper trophic level predators with highly-overlapping niches, yet their ecological interactions and subsequent effects have remained obscure. Using long-term electronic tagging and survey data we reveal rare and cryptic interactions between these predators at a shared foraging site, Southeast Farallon Island (SEFI). In multiple instances, brief visits from killer whales displaced white sharks from SEFI, disrupting shark feeding behavior for extended periods at this aggregation site. As a result, annual predations of pinnipeds by white sharks at SEFI were negatively correlated with close encounters with killer whales. Tagged white sharks relocated to other aggregation sites, creating detectable increases in white shark density at Ano Nuevo Island. This work highlights the importance of risk effects and intraguild relationships among top ocean predators and the value of long-term data sets revealing these consequential, albeit infrequent, ecological interactions.

Indexed as

Predatory BehaviorSharksWhale, KillerAnimalsFeeding BehaviorFood ChainSeals, Earless

Identifiers

PMID30992478
PMCPMC6467992

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.