Data from: Architecture of the sperm whale forehead facilitates ramming combat
Herman Melville's novel Moby Dick was inspired by historical instances in which large sperm whales (Physeter macrocephalus L.) sank 19th century whaling ships by ramming them with their foreheads. The immense forehead of sperm whales is possibly the largest, and one of the strangest, anatomical...
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ftzenodo:oai:zenodo.org:4961095 2024-09-15T18:30:30+00:00 Data from: Architecture of the sperm whale forehead facilitates ramming combat Panagiotopoulou, Olga Spyridis, Panagiotis Mehari Abraha, Hyab Carrier, David R. Pataky, Todd C. 2017-03-22 https://doi.org/10.5061/dryad.81rp6 unknown Zenodo https://doi.org/10.7717/peerj.1895 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.81rp6 oai:zenodo.org:4961095 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode ramming combat spermaceti organ Physeter macrocephalus L probabilistic simulation junk finite element analysis head-butting info:eu-repo/semantics/other 2017 ftzenodo https://doi.org/10.5061/dryad.81rp610.7717/peerj.1895 2024-07-26T16:51:10Z Herman Melville's novel Moby Dick was inspired by historical instances in which large sperm whales (Physeter macrocephalus L.) sank 19th century whaling ships by ramming them with their foreheads. The immense forehead of sperm whales is possibly the largest, and one of the strangest, anatomical structures in the animal kingdom. It contains two large oil-filled compartments, known as the "spermaceti organ" and "junk", that constitute up to one-quarter of body mass and extend one-third of the total length of the whale. Recognized as playing an important role in echolocation, previous studies have also attributed the complex structural configuration of the spermaceti organ and junk to acoustic sexual selection, acoustic prey debilitation, buoyancy control, and aggressive ramming. Of these additional suggested functions, ramming remains the most controversial, and the potential mechanical roles of the structural components of the spermaceti organ and junk in ramming remain untested. Here we explore the aggressive ramming hypothesis using a novel combination of structural engineering principles and probabilistic simulation to determine if the unique structure of the junk significantly reduces stress in the skull during quasi-static impact. Our analyses indicate that the connective tissue partitions in the junk reduce von Mises stresses across the skull and the load-redistribution functionality of the former is insensitive to tissue material parameters, the thickness of the partitions, and variations in the location and angle of the applied load. Absence of the connective tissue partitions increases skull stresses, particularly in the rostral aspect of the upper jaw, further hinting of the important role the architecture of the junk may play in ramming events. Our study also found that impact loads on the spermaceti organ generate lower skull stresses than an impact on the junk. Nevertheless, whilst an impact on the spermaceti organ would reduce skull stresses, it would also cause high compressive stresses on the ... Other/Unknown Material Physeter macrocephalus Sperm whale Zenodo |
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op_collection_id |
ftzenodo |
language |
unknown |
topic |
ramming combat spermaceti organ Physeter macrocephalus L probabilistic simulation junk finite element analysis head-butting |
spellingShingle |
ramming combat spermaceti organ Physeter macrocephalus L probabilistic simulation junk finite element analysis head-butting Panagiotopoulou, Olga Spyridis, Panagiotis Mehari Abraha, Hyab Carrier, David R. Pataky, Todd C. Data from: Architecture of the sperm whale forehead facilitates ramming combat |
topic_facet |
ramming combat spermaceti organ Physeter macrocephalus L probabilistic simulation junk finite element analysis head-butting |
description |
Herman Melville's novel Moby Dick was inspired by historical instances in which large sperm whales (Physeter macrocephalus L.) sank 19th century whaling ships by ramming them with their foreheads. The immense forehead of sperm whales is possibly the largest, and one of the strangest, anatomical structures in the animal kingdom. It contains two large oil-filled compartments, known as the "spermaceti organ" and "junk", that constitute up to one-quarter of body mass and extend one-third of the total length of the whale. Recognized as playing an important role in echolocation, previous studies have also attributed the complex structural configuration of the spermaceti organ and junk to acoustic sexual selection, acoustic prey debilitation, buoyancy control, and aggressive ramming. Of these additional suggested functions, ramming remains the most controversial, and the potential mechanical roles of the structural components of the spermaceti organ and junk in ramming remain untested. Here we explore the aggressive ramming hypothesis using a novel combination of structural engineering principles and probabilistic simulation to determine if the unique structure of the junk significantly reduces stress in the skull during quasi-static impact. Our analyses indicate that the connective tissue partitions in the junk reduce von Mises stresses across the skull and the load-redistribution functionality of the former is insensitive to tissue material parameters, the thickness of the partitions, and variations in the location and angle of the applied load. Absence of the connective tissue partitions increases skull stresses, particularly in the rostral aspect of the upper jaw, further hinting of the important role the architecture of the junk may play in ramming events. Our study also found that impact loads on the spermaceti organ generate lower skull stresses than an impact on the junk. Nevertheless, whilst an impact on the spermaceti organ would reduce skull stresses, it would also cause high compressive stresses on the ... |
format |
Other/Unknown Material |
author |
Panagiotopoulou, Olga Spyridis, Panagiotis Mehari Abraha, Hyab Carrier, David R. Pataky, Todd C. |
author_facet |
Panagiotopoulou, Olga Spyridis, Panagiotis Mehari Abraha, Hyab Carrier, David R. Pataky, Todd C. |
author_sort |
Panagiotopoulou, Olga |
title |
Data from: Architecture of the sperm whale forehead facilitates ramming combat |
title_short |
Data from: Architecture of the sperm whale forehead facilitates ramming combat |
title_full |
Data from: Architecture of the sperm whale forehead facilitates ramming combat |
title_fullStr |
Data from: Architecture of the sperm whale forehead facilitates ramming combat |
title_full_unstemmed |
Data from: Architecture of the sperm whale forehead facilitates ramming combat |
title_sort |
data from: architecture of the sperm whale forehead facilitates ramming combat |
publisher |
Zenodo |
publishDate |
2017 |
url |
https://doi.org/10.5061/dryad.81rp6 |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_relation |
https://doi.org/10.7717/peerj.1895 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.81rp6 oai:zenodo.org:4961095 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.81rp610.7717/peerj.1895 |
_version_ |
1810471958384476160 |