Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon
There is increasing evidence that females can somehow improve their offspring fitness by mating with multiple males, but we understand little about the exact stage(s) at which such benefits are gained. Here, we measure whether offspring fitness is influenced by mechanisms operating solely between sp...
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ftdoajarticles:oai:doaj.org/article:dbebd4f7412a46c09722f8553e9b2973 2023-05-15T15:31:41+02:00 Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon Alyson J. Lumley Sian E. Diamond Sigurd Einum Sarah E. Yeates Danielle Peruffo Brent C. Emerson Matthew J. G. Gage 2016-01-01T00:00:00Z https://doi.org/10.1098/rsos.150709 https://doaj.org/article/dbebd4f7412a46c09722f8553e9b2973 EN eng The Royal Society https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150709 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.150709 https://doaj.org/article/dbebd4f7412a46c09722f8553e9b2973 Royal Society Open Science, Vol 3, Iss 3 (2016) fertilization sperm competition cryptic female choice polyandry atlantic salmon gamete Science Q article 2016 ftdoajarticles https://doi.org/10.1098/rsos.150709 2022-12-31T12:53:41Z There is increasing evidence that females can somehow improve their offspring fitness by mating with multiple males, but we understand little about the exact stage(s) at which such benefits are gained. Here, we measure whether offspring fitness is influenced by mechanisms operating solely between sperm and egg. Using externally fertilizing and polyandrous Atlantic salmon (Salmo salar), we employed split-clutch and split-ejaculate in vitro fertilization experiments to generate offspring using designs that either denied or applied opportunities for sperm competition and cryptic female choice. Following fertilizations, we measured 140 days of offspring fitness after hatch, through growth and survival in hatchery and near-natural conditions. Despite an average composite mortality of 61%, offspring fitness at every life stage was near-identical between groups fertilized under the absence versus presence of opportunities for sperm competition and cryptic female choice. Of the 21 551 and 21 771 eggs from 24 females fertilized under monandrous versus polyandrous conditions, 68% versus 67.8% survived to the 100-day juvenile stage; sub-samples showed similar hatching success (73.1% versus 74.3%), had similar survival over 40 days in near-natural streams (57.3% versus 56.2%) and grew at similar rates throughout. We therefore found no evidence that gamete-specific interactions allow offspring fitness benefits when polyandrous fertilization conditions provide opportunities for sperm competition and cryptic female choice. Article in Journal/Newspaper Atlantic salmon Salmo salar Directory of Open Access Journals: DOAJ Articles Royal Society Open Science 3 3 150709 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
fertilization sperm competition cryptic female choice polyandry atlantic salmon gamete Science Q |
spellingShingle |
fertilization sperm competition cryptic female choice polyandry atlantic salmon gamete Science Q Alyson J. Lumley Sian E. Diamond Sigurd Einum Sarah E. Yeates Danielle Peruffo Brent C. Emerson Matthew J. G. Gage Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon |
topic_facet |
fertilization sperm competition cryptic female choice polyandry atlantic salmon gamete Science Q |
description |
There is increasing evidence that females can somehow improve their offspring fitness by mating with multiple males, but we understand little about the exact stage(s) at which such benefits are gained. Here, we measure whether offspring fitness is influenced by mechanisms operating solely between sperm and egg. Using externally fertilizing and polyandrous Atlantic salmon (Salmo salar), we employed split-clutch and split-ejaculate in vitro fertilization experiments to generate offspring using designs that either denied or applied opportunities for sperm competition and cryptic female choice. Following fertilizations, we measured 140 days of offspring fitness after hatch, through growth and survival in hatchery and near-natural conditions. Despite an average composite mortality of 61%, offspring fitness at every life stage was near-identical between groups fertilized under the absence versus presence of opportunities for sperm competition and cryptic female choice. Of the 21 551 and 21 771 eggs from 24 females fertilized under monandrous versus polyandrous conditions, 68% versus 67.8% survived to the 100-day juvenile stage; sub-samples showed similar hatching success (73.1% versus 74.3%), had similar survival over 40 days in near-natural streams (57.3% versus 56.2%) and grew at similar rates throughout. We therefore found no evidence that gamete-specific interactions allow offspring fitness benefits when polyandrous fertilization conditions provide opportunities for sperm competition and cryptic female choice. |
format |
Article in Journal/Newspaper |
author |
Alyson J. Lumley Sian E. Diamond Sigurd Einum Sarah E. Yeates Danielle Peruffo Brent C. Emerson Matthew J. G. Gage |
author_facet |
Alyson J. Lumley Sian E. Diamond Sigurd Einum Sarah E. Yeates Danielle Peruffo Brent C. Emerson Matthew J. G. Gage |
author_sort |
Alyson J. Lumley |
title |
Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon |
title_short |
Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon |
title_full |
Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon |
title_fullStr |
Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon |
title_full_unstemmed |
Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon |
title_sort |
post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon |
publisher |
The Royal Society |
publishDate |
2016 |
url |
https://doi.org/10.1098/rsos.150709 https://doaj.org/article/dbebd4f7412a46c09722f8553e9b2973 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Royal Society Open Science, Vol 3, Iss 3 (2016) |
op_relation |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150709 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.150709 https://doaj.org/article/dbebd4f7412a46c09722f8553e9b2973 |
op_doi |
https://doi.org/10.1098/rsos.150709 |
container_title |
Royal Society Open Science |
container_volume |
3 |
container_issue |
3 |
container_start_page |
150709 |
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1766362211366731776 |