Development Of Mechanosensory Responses In Myelinated Copepods
This thesis will examine the mechanosensory capabilities of juvenile copepods from an essential prey species in the North Atlantic food web, Calanus finmarchicus. An important underlying component of these interactions is myelination of axons associated with decreased response latencies, yet myelina...
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ftunivhawaiimano:oai:scholarspace.manoa.hawaii.edu:10125/10555 2023-05-15T15:47:59+02:00 Development Of Mechanosensory Responses In Myelinated Copepods Funk, Kevin R. 2005-08 application/pdf http://hdl.handle.net/10125/10555 unknown Theses for the degree of Master of Science (University of Hawaii at Manoa). Zoology (Marine Biology); no. 3981 http://hdl.handle.net/10125/10555 All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. Thesis Text 2005 ftunivhawaiimano 2022-07-17T13:18:15Z This thesis will examine the mechanosensory capabilities of juvenile copepods from an essential prey species in the North Atlantic food web, Calanus finmarchicus. An important underlying component of these interactions is myelination of axons associated with decreased response latencies, yet myelination has not been observed in electron micrographs of copepod nauplii. Electrophysiological recordings from juvenile copepods are presented and their analysis found that myelin is consistently present in CII and later copepodite stages (CI copepodids could not be obtained for recording). Two unidirectional mechanosensory units were distinguished in all developmental stages studied using a controlled hydrodynamic stimulus, while a third slower non-mechanosensory unit was observed. Adults were found to be the most sensitive to mechanosensory stimuli, with thresholds of water displacement (not velocity, as reported in other copepods) of less than a nanometer. While copepodids were less sensitive, much longer antenna:prosome ratios were observed in CII copepodids. Thesis Calanus finmarchicus North Atlantic Copepods ScholarSpace at University of Hawaii at Manoa |
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ScholarSpace at University of Hawaii at Manoa |
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ftunivhawaiimano |
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description |
This thesis will examine the mechanosensory capabilities of juvenile copepods from an essential prey species in the North Atlantic food web, Calanus finmarchicus. An important underlying component of these interactions is myelination of axons associated with decreased response latencies, yet myelination has not been observed in electron micrographs of copepod nauplii. Electrophysiological recordings from juvenile copepods are presented and their analysis found that myelin is consistently present in CII and later copepodite stages (CI copepodids could not be obtained for recording). Two unidirectional mechanosensory units were distinguished in all developmental stages studied using a controlled hydrodynamic stimulus, while a third slower non-mechanosensory unit was observed. Adults were found to be the most sensitive to mechanosensory stimuli, with thresholds of water displacement (not velocity, as reported in other copepods) of less than a nanometer. While copepodids were less sensitive, much longer antenna:prosome ratios were observed in CII copepodids. |
format |
Thesis |
author |
Funk, Kevin R. |
spellingShingle |
Funk, Kevin R. Development Of Mechanosensory Responses In Myelinated Copepods |
author_facet |
Funk, Kevin R. |
author_sort |
Funk, Kevin R. |
title |
Development Of Mechanosensory Responses In Myelinated Copepods |
title_short |
Development Of Mechanosensory Responses In Myelinated Copepods |
title_full |
Development Of Mechanosensory Responses In Myelinated Copepods |
title_fullStr |
Development Of Mechanosensory Responses In Myelinated Copepods |
title_full_unstemmed |
Development Of Mechanosensory Responses In Myelinated Copepods |
title_sort |
development of mechanosensory responses in myelinated copepods |
publishDate |
2005 |
url |
http://hdl.handle.net/10125/10555 |
genre |
Calanus finmarchicus North Atlantic Copepods |
genre_facet |
Calanus finmarchicus North Atlantic Copepods |
op_relation |
Theses for the degree of Master of Science (University of Hawaii at Manoa). Zoology (Marine Biology); no. 3981 http://hdl.handle.net/10125/10555 |
op_rights |
All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. |
_version_ |
1766382970093961216 |