ArticleScientific reports2019
Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications.
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.
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
11 citing papers in PubMed, 25 citations in OpenAlex.
- Brain Morphology and Quantitative Assessment of Sensory Brain Areas in Southern Bluefin Tuna, Thunnus maccoyii (Scombridae, Teleostei).The Journal of comparative neurology · 2026Article
- Bioimaging of sense organs and the central nervous system in extant fishes and reptiles in situ: A review.Anatomical record (Hoboken, N.J. : 2007) · 2026Review
- The visual system of the longest-living vertebrate, the Greenland shark.Nature communications · 2026Article
- The organization of serotonergic fibers in the Pacific angelshark brain: neuroanatomical and supercomputing analyses.Frontiers in neuroscience · 2025Article
- Quantitative assessment of inner ear variation in elasmobranchs.Scientific reports · 2023Article
- Ontogenetic shifts in olfactory rosette morphology of the sockeye salmon, Oncorhynchus nerka.Journal of morphology · 2023Article
- Morphometric analysis of lungfish endocasts elucidates early dipnoan palaeoneurological evolution.eLife · 2022Article
- Sniffing out Stingray Noses: The Functional Morphology of Batoid Olfaction.Integrative organismal biology (Oxford, England) · 2022Article
- A brain and a head for a different habitat: Size variation in four morphs of Arctic charr (Ecology and evolution · 2020Article
- Multimodal Imaging and Analysis of the Neuroanatomical Organization of the Primary Olfactory Inputs in the Brownbanded Bamboo Shark,Frontiers in neuroanatomy · 2020Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 6 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In cartilaginous fishes, variability in the size of the brain and its major regions is often associated with primary habitat and/or specific behavior patterns, which may allow for predictions on the relative importance of different sensory modalities. The Greenland (Somniosus microcephalus) and Pacific sleeper (S. pacificus) sharks are the only non-lamnid shark species found in the Arctic and are among the longest living vertebrates ever described. Despite a presumed visual impairment caused by the regular presence of parasitic ocular lesions, coupled with the fact that locomotory muscle power is often depressed at cold temperatures, these sharks remain capable of capturing active prey, including pinnipeds. Using magnetic resonance imaging (MRI), brain organization of S. microcephalus and S. pacificus was assessed in the context of up to 117 other cartilaginous fish species, using phylogenetic comparative techniques. Notably, the region of the brain responsible for motor control (cerebellum) is small and lacking foliation, a characteristic not yet described for any other large-bodied (>3 m) shark. Further, the development of the optic tectum is relatively reduced, while olfactory brain regions are among the largest of any shark species described to date, suggestive of an olfactory-mediated rather than a visually-mediated lifestyle.
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.