Evidence map›Paper›PMID 40050350›Full record

ArticleScientific reports2025

Migration to breeding areas by male sperm whales Physeter macrocephalus from the Northeast Atlantic Arctic.

Christian Lydersen, Marie-Anne Blanchet, Kit M Kovacs, Tiu Similä, Carla Freitas, Zoë Morange, Ove M Pedersen, Emma F Vogel, Marten Bril, Guttorm Christensen and 1 more

Abstract read
In one paragraph

Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

2 citing papers in PubMed.

  1. Article
  2. 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

11 authors.

Christian Lydersen *Norwegian Polar Institute, Fram Centre, 9296, Tromsø, Norway. Lydersen@npolar.no.
Marie-Anne Blanchet *Norwegian Polar Institute, Fram Centre, 9296, Tromsø, Norway.
Kit M KovacsNorwegian Polar Institute, Fram Centre, 9296, Tromsø, Norway.
Tiu SimiläWhale2Sea, Hamnegata 9, 8480, Andenes, Norway.
Carla FreitasInstitute for Marine Research, Flødevigen Research Station, 4817, His, Norway.
Zoë MorangeFaculty of Biosciences, Fisheries and Economics, UiT - The Arctic University of Norway, 9019, Tromsø, Norway.
Ove M PedersenWhale2Sea, Hamnegata 9, 8480, Andenes, Norway.
Emma F VogelFaculty of Biosciences, Fisheries and Economics, UiT - The Arctic University of Norway, 9019, Tromsø, Norway.
Marten BrilWhale2Sea, Hamnegata 9, 8480, Andenes, Norway.
Guttorm ChristensenAkvaplan-Niva, Fram Centre, 9296, Tromsø, Norway.
Audun H RikardsenFaculty of Biosciences, Fisheries and Economics, UiT - The Arctic University of Norway, 9019, Tromsø, Norway.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mature male sperm whales (Physeter macrocephalus) primarily inhabit high latitude regions, travelling to tropical/temperate waters for breeding, where females and juveniles reside in cohesive social groups. Though mating is known to occur at low latitudes, the timing, duration, and routes of adult male migrations between feeding and breeding areas are poorly known. To study movement patterns of adult male sperm whales, 29 individuals were equipped with satellite transmitters in the Northeast Atlantic Arctic (69-79°N). Twelve of these animals undertook southward migrations. Departures from northern latitudes occurred asynchronously from January to October, indicating that sperm whales do not have a well-defined breeding season. Migrating males travelled 40 (± 11) d to reach the breeding areas at latitudes below 45°N. They travelled distances of 3,993-7,951 km. They spent 76 (± 22) d in the south, roaming across an enormous region (˃10 million km

Indexed as

Animal MigrationReproductionSexual Behavior, AnimalSperm WhaleAnimalsArctic RegionsAtlantic OceanBreedingFemaleMaleSeasonsDistributionSexual segregationYear-round midlatitude breeding

Identifiers

PMID40050350
PMCPMC11885442

What OpenQuestion holds

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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.