Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications
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 Paci...
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1300 2023-06-11T04:09:36+02:00 Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications Yopak, Kara E. McMeans, Bailey C. Mull, Christopher G. Feindel, Kirk W. Kovacs, Kit M. Lydersen, Christian Fisk, Aaron T. Collin, Shaun P. 2019-12-01T08:00:00Z application/pdf https://scholar.uwindsor.ca/glierpub/298 https://doi.org/10.1038/s41598-019-46225-5 https://scholar.uwindsor.ca/context/glierpub/article/1300/viewcontent/Comparative_Brain_Morphology_of_the_Greenland_and_Pacific_Sleeper_Sharks_and_its_Functional_Implications.pdf unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/298 doi:10.1038/s41598-019-46225-5 https://scholar.uwindsor.ca/context/glierpub/article/1300/viewcontent/Comparative_Brain_Morphology_of_the_Greenland_and_Pacific_Sleeper_Sharks_and_its_Functional_Implications.pdf http://creativecommons.org/licenses/by/4.0/ Great Lakes Institute for Environmental Research Publications Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology text 2019 ftunivwindsor https://doi.org/10.1038/s41598-019-46225-5 2023-05-06T19:10:44Z 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. Text Arctic Greenland Somniosus microcephalus University of Windsor, Ontario: Scholarship at UWindsor Arctic Greenland Pacific Scientific Reports 9 1 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology |
spellingShingle |
Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology Yopak, Kara E. McMeans, Bailey C. Mull, Christopher G. Feindel, Kirk W. Kovacs, Kit M. Lydersen, Christian Fisk, Aaron T. Collin, Shaun P. Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications |
topic_facet |
Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology |
description |
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. |
format |
Text |
author |
Yopak, Kara E. McMeans, Bailey C. Mull, Christopher G. Feindel, Kirk W. Kovacs, Kit M. Lydersen, Christian Fisk, Aaron T. Collin, Shaun P. |
author_facet |
Yopak, Kara E. McMeans, Bailey C. Mull, Christopher G. Feindel, Kirk W. Kovacs, Kit M. Lydersen, Christian Fisk, Aaron T. Collin, Shaun P. |
author_sort |
Yopak, Kara E. |
title |
Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications |
title_short |
Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications |
title_full |
Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications |
title_fullStr |
Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications |
title_full_unstemmed |
Comparative Brain Morphology of the Greenland and Pacific Sleeper Sharks and its Functional Implications |
title_sort |
comparative brain morphology of the greenland and pacific sleeper sharks and its functional implications |
publisher |
Scholarship at UWindsor |
publishDate |
2019 |
url |
https://scholar.uwindsor.ca/glierpub/298 https://doi.org/10.1038/s41598-019-46225-5 https://scholar.uwindsor.ca/context/glierpub/article/1300/viewcontent/Comparative_Brain_Morphology_of_the_Greenland_and_Pacific_Sleeper_Sharks_and_its_Functional_Implications.pdf |
geographic |
Arctic Greenland Pacific |
geographic_facet |
Arctic Greenland Pacific |
genre |
Arctic Greenland Somniosus microcephalus |
genre_facet |
Arctic Greenland Somniosus microcephalus |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/298 doi:10.1038/s41598-019-46225-5 https://scholar.uwindsor.ca/context/glierpub/article/1300/viewcontent/Comparative_Brain_Morphology_of_the_Greenland_and_Pacific_Sleeper_Sharks_and_its_Functional_Implications.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/s41598-019-46225-5 |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
_version_ |
1768383546722877440 |