Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding.
A mismatch between male and female gamete release can result in reduced or failed fertilization in external fertilizers, sperm competition and reduced paternity. Here, I video monitored spawning behavior of free living Arctic charr (Salvelinus alpinus), and analyzed details of their reproductive bio...
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UiT Norges arktiske universitet
2017
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ftunivtroemsoe:oai:munin.uit.no:10037/12781 2023-05-15T14:30:00+02:00 Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. Brattli, Magnus Beyer 2017-05-15 https://hdl.handle.net/10037/12781 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway https://hdl.handle.net/10037/12781 Copyright 2017 The Author(s) Arctic charr Salvelinus alpinus Reproductive behavior Spawning synchrony Sperm competition Female choice Mate guarding Quivering Vibrational communication Signal Acoustic communication VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 BIO-3950 Master thesis Mastergradsoppgave 2017 ftunivtroemsoe 2021-06-25T17:55:56Z A mismatch between male and female gamete release can result in reduced or failed fertilization in external fertilizers, sperm competition and reduced paternity. Here, I video monitored spawning behavior of free living Arctic charr (Salvelinus alpinus), and analyzed details of their reproductive biology. In total, 157 spawnings were recorded. Females clearly preferred spawning with the dominant male, and even under sperm competition a high level of synchrony in timing of gametes released was observed. Although the average sneaker released his milt 0.6 seconds after the spawning female, sneakers spawned with higher synchrony than the dominant male in single male spawning event. Approximately 50% of the recorded spawning events occurred under sperm competition, where each event included an average of 2.7 males. Sneakers were more exposed to sperm competition than dominant males. An influx of males in close proximity to the female occurs during the behavioral sequences leading up to egg release, but this influx seems not dependent on egg release (i.e., in situations of “near” spawnings). This suggests that there is something other than gonadal product that attract males to the spawning female. I suggest that vibrational communication between the spawning couple reveals time of gamete release to surrounding males. This might explain the relative high level of synchrony observed in both male tactics, yet, vibrational communication comes with the cost of higher detectability from surrounding males. Throughout this study, mate guarding seems to be the prevailing factor for paternity in Arctic charr. Mate guarding effect accessibility to females, sperm competition, synchrony of gamete release and subsequent egg predation. Master Thesis Arctic charr Arctic Salvelinus alpinus University of Tromsø: Munin Open Research Archive Arctic |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
Arctic charr Salvelinus alpinus Reproductive behavior Spawning synchrony Sperm competition Female choice Mate guarding Quivering Vibrational communication Signal Acoustic communication VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 BIO-3950 |
spellingShingle |
Arctic charr Salvelinus alpinus Reproductive behavior Spawning synchrony Sperm competition Female choice Mate guarding Quivering Vibrational communication Signal Acoustic communication VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 BIO-3950 Brattli, Magnus Beyer Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. |
topic_facet |
Arctic charr Salvelinus alpinus Reproductive behavior Spawning synchrony Sperm competition Female choice Mate guarding Quivering Vibrational communication Signal Acoustic communication VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 BIO-3950 |
description |
A mismatch between male and female gamete release can result in reduced or failed fertilization in external fertilizers, sperm competition and reduced paternity. Here, I video monitored spawning behavior of free living Arctic charr (Salvelinus alpinus), and analyzed details of their reproductive biology. In total, 157 spawnings were recorded. Females clearly preferred spawning with the dominant male, and even under sperm competition a high level of synchrony in timing of gametes released was observed. Although the average sneaker released his milt 0.6 seconds after the spawning female, sneakers spawned with higher synchrony than the dominant male in single male spawning event. Approximately 50% of the recorded spawning events occurred under sperm competition, where each event included an average of 2.7 males. Sneakers were more exposed to sperm competition than dominant males. An influx of males in close proximity to the female occurs during the behavioral sequences leading up to egg release, but this influx seems not dependent on egg release (i.e., in situations of “near” spawnings). This suggests that there is something other than gonadal product that attract males to the spawning female. I suggest that vibrational communication between the spawning couple reveals time of gamete release to surrounding males. This might explain the relative high level of synchrony observed in both male tactics, yet, vibrational communication comes with the cost of higher detectability from surrounding males. Throughout this study, mate guarding seems to be the prevailing factor for paternity in Arctic charr. Mate guarding effect accessibility to females, sperm competition, synchrony of gamete release and subsequent egg predation. |
format |
Master Thesis |
author |
Brattli, Magnus Beyer |
author_facet |
Brattli, Magnus Beyer |
author_sort |
Brattli, Magnus Beyer |
title |
Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. |
title_short |
Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. |
title_full |
Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. |
title_fullStr |
Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. |
title_full_unstemmed |
Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. |
title_sort |
spawning behavior of arctic charr (salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. |
publisher |
UiT Norges arktiske universitet |
publishDate |
2017 |
url |
https://hdl.handle.net/10037/12781 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_relation |
https://hdl.handle.net/10037/12781 |
op_rights |
Copyright 2017 The Author(s) |
_version_ |
1766303941254971392 |