Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission
Computed tomography (CT) has been an essential tool for imaging anatomy in a clinical setting. CT scans can provide insights on genital interactions between the sexes during intromission and is a valuable tool for species with internal fertilization as copulatory biomechanics can be discerned during...
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fttexasamucorpus:oai:tamucc-ir.tdl.org:1969.6/92009 2023-10-25T01:40:08+02:00 Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission Deel, Madeleine C. Orbach, Dara N. 2022-04 application/vnd.openxmlformats-officedocument.presentationml.presentation https://hdl.handle.net/1969.6/92009 en_US eng https://hdl.handle.net/1969.6/92009 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Mammal killer whale imaging technology Presentation 2022 fttexasamucorpus 2023-09-25T10:24:26Z Computed tomography (CT) has been an essential tool for imaging anatomy in a clinical setting. CT scans can provide insights on genital interactions between the sexes during intromission and is a valuable tool for species with internal fertilization as copulatory biomechanics can be discerned during penile penetration. We use CT scans of orcas (Orcinus orca) in simulated copulation to increase understanding of genital co- evolution and copulatory fit between the sexes. The penis of a postmortem sexually mature orca was inflated with pressurized saline to simulate erection and inserted in a ventral-ventral positioning into the vagina of a postmortem sexually mature female orca. The specimens were CT scanned in simulated copulation and resulting image slices were segmented by tissue type to create a 3D visualization of the genitalia interacting and determine significant landmarks in contact between the sexes. The ventral-ventral positioning produced a tight fit between the genitalia. One major vaginal fold was located cranially in the vagina. The integument of the penis maintaining contact throughout the vagina until tapering at the cervix, maintaining contact with the right distal wall of the vaginal tissue. Understanding of contact points between the sexes yields insights into possible stimulatory functions of genital contact in cetaceans (whales, dolphins, and porpoises) and sexual selection forces driving reproductive morphological co-evolution. Conference Object Killer Whale Orca Orcinus orca Killer whale Texas A&M University - Corpus Christi: DSpace Repository |
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Open Polar |
collection |
Texas A&M University - Corpus Christi: DSpace Repository |
op_collection_id |
fttexasamucorpus |
language |
English |
topic |
Mammal killer whale imaging technology |
spellingShingle |
Mammal killer whale imaging technology Deel, Madeleine C. Orbach, Dara N. Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission |
topic_facet |
Mammal killer whale imaging technology |
description |
Computed tomography (CT) has been an essential tool for imaging anatomy in a clinical setting. CT scans can provide insights on genital interactions between the sexes during intromission and is a valuable tool for species with internal fertilization as copulatory biomechanics can be discerned during penile penetration. We use CT scans of orcas (Orcinus orca) in simulated copulation to increase understanding of genital co- evolution and copulatory fit between the sexes. The penis of a postmortem sexually mature orca was inflated with pressurized saline to simulate erection and inserted in a ventral-ventral positioning into the vagina of a postmortem sexually mature female orca. The specimens were CT scanned in simulated copulation and resulting image slices were segmented by tissue type to create a 3D visualization of the genitalia interacting and determine significant landmarks in contact between the sexes. The ventral-ventral positioning produced a tight fit between the genitalia. One major vaginal fold was located cranially in the vagina. The integument of the penis maintaining contact throughout the vagina until tapering at the cervix, maintaining contact with the right distal wall of the vaginal tissue. Understanding of contact points between the sexes yields insights into possible stimulatory functions of genital contact in cetaceans (whales, dolphins, and porpoises) and sexual selection forces driving reproductive morphological co-evolution. |
format |
Conference Object |
author |
Deel, Madeleine C. Orbach, Dara N. |
author_facet |
Deel, Madeleine C. Orbach, Dara N. |
author_sort |
Deel, Madeleine C. |
title |
Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission |
title_short |
Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission |
title_full |
Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission |
title_fullStr |
Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission |
title_full_unstemmed |
Utilization of computated tomography to view genital interactions in orcas (Orcinus orca) during intromission |
title_sort |
utilization of computated tomography to view genital interactions in orcas (orcinus orca) during intromission |
publishDate |
2022 |
url |
https://hdl.handle.net/1969.6/92009 |
genre |
Killer Whale Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Killer whale |
op_relation |
https://hdl.handle.net/1969.6/92009 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
_version_ |
1780735882554245120 |