Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization
This Document is Protected by copyright and was first published by Frontiers. All rights reserved. It is reproduced with permission. Seminal fluids are known to have a variety of effects on rival sperm, but in externally fertilizing species it is still unclear what effects seminal fluid can induce u...
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Online Access: | https://hdl.handle.net/10037/8540 https://doi.org/10.3389/fevo.2015.00092 |
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ftunivtroemsoe:oai:munin.uit.no:10037/8540 2023-05-15T14:30:07+02:00 Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization Rudolfsen, Geir Vaz, Jonathan Serrano Folstad, Ivar 2015-08-03 https://hdl.handle.net/10037/8540 https://doi.org/10.3389/fevo.2015.00092 eng eng Frontiers Media Frontiers in Ecology and Evolution 2015, 3 FRIDAID 1258565 doi:10.3389/fevo.2015.00092 2296-701X https://hdl.handle.net/10037/8540 URN:NBN:no-uit_munin_8101 openAccess sperm competition sexual selection sperm motility ejaculate Arctic charr VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Journal article Tidsskriftartikkel Peer reviewed 2015 ftunivtroemsoe https://doi.org/10.3389/fevo.2015.00092 2021-06-25T17:54:34Z This Document is Protected by copyright and was first published by Frontiers. All rights reserved. It is reproduced with permission. Seminal fluids are known to have a variety of effects on rival sperm, but in externally fertilizing species it is still unclear what effects seminal fluid can induce under sperm competition. We recorded sperm activity from natural ejaculates (including own seminal fluid) of an external fertilizer, the Arctic charr (Salvelinus alpinus), after activation either in water (the natural medium for milt dilution), in a dilution of water and own seminal fluid or in a dilution of water and seminal fluid of a foreign male. When activation occurred in own or foreign dilutions of seminal fluids, sperm maintained higher velocities than when activated in water only. Yet, velocity did not differ depending on whether sperm was activated in own or foreign seminal fluid solutions. More important, approximately 25% fewer sperm cells were initially activated in own seminal fluid than in foreign seminal fluid or water, indicating that activation is under close control of own seminal fluid only. Our results document that the presence of foreign seminal fluid under sperm competition do not have apparent effect on sperm velocity. Yet, the large inhibitory effect on initial activation of sperm cells seen in own, but not in foreign dilutions of seminal fluids (and water) suggests an individual specific recognition mechanism exerted by something in the seminal fluid on own, but not foreign sperm cells. The importance of this extrasomatic sperm recognition for the outcome of sperm competitions is discussed. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus University of Tromsø: Munin Open Research Archive Arctic Frontiers in Ecology and Evolution 3 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
sperm competition sexual selection sperm motility ejaculate Arctic charr VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
spellingShingle |
sperm competition sexual selection sperm motility ejaculate Arctic charr VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Rudolfsen, Geir Vaz, Jonathan Serrano Folstad, Ivar Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization |
topic_facet |
sperm competition sexual selection sperm motility ejaculate Arctic charr VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
description |
This Document is Protected by copyright and was first published by Frontiers. All rights reserved. It is reproduced with permission. Seminal fluids are known to have a variety of effects on rival sperm, but in externally fertilizing species it is still unclear what effects seminal fluid can induce under sperm competition. We recorded sperm activity from natural ejaculates (including own seminal fluid) of an external fertilizer, the Arctic charr (Salvelinus alpinus), after activation either in water (the natural medium for milt dilution), in a dilution of water and own seminal fluid or in a dilution of water and seminal fluid of a foreign male. When activation occurred in own or foreign dilutions of seminal fluids, sperm maintained higher velocities than when activated in water only. Yet, velocity did not differ depending on whether sperm was activated in own or foreign seminal fluid solutions. More important, approximately 25% fewer sperm cells were initially activated in own seminal fluid than in foreign seminal fluid or water, indicating that activation is under close control of own seminal fluid only. Our results document that the presence of foreign seminal fluid under sperm competition do not have apparent effect on sperm velocity. Yet, the large inhibitory effect on initial activation of sperm cells seen in own, but not in foreign dilutions of seminal fluids (and water) suggests an individual specific recognition mechanism exerted by something in the seminal fluid on own, but not foreign sperm cells. The importance of this extrasomatic sperm recognition for the outcome of sperm competitions is discussed. |
format |
Article in Journal/Newspaper |
author |
Rudolfsen, Geir Vaz, Jonathan Serrano Folstad, Ivar |
author_facet |
Rudolfsen, Geir Vaz, Jonathan Serrano Folstad, Ivar |
author_sort |
Rudolfsen, Geir |
title |
Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization |
title_short |
Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization |
title_full |
Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization |
title_fullStr |
Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization |
title_full_unstemmed |
Own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization |
title_sort |
own,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilization |
publisher |
Frontiers Media |
publishDate |
2015 |
url |
https://hdl.handle.net/10037/8540 https://doi.org/10.3389/fevo.2015.00092 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_relation |
Frontiers in Ecology and Evolution 2015, 3 FRIDAID 1258565 doi:10.3389/fevo.2015.00092 2296-701X https://hdl.handle.net/10037/8540 URN:NBN:no-uit_munin_8101 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3389/fevo.2015.00092 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
3 |
_version_ |
1766304036137467904 |