Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner
We quantified individual differences in Atlantic cod, Gadus morhua, reproductive behaviour at a field-reported spawning density under experimental conditions. Marked individuals (nine females, seven males) were observed twice daily and videotaped continuously for 9 weeks at ambient photoperiod and t...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1999
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f98-216 http://www.nrcresearchpress.com/doi/pdf/10.1139/f98-216 |
id |
crcansciencepubl:10.1139/f98-216 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f98-216 2024-05-12T08:00:54+00:00 Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner Hutchings, Jeffrey A Bishop, Todd D McGregor-Shaw, Carolyn R 1999 http://dx.doi.org/10.1139/f98-216 http://www.nrcresearchpress.com/doi/pdf/10.1139/f98-216 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 1, page 97-104 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1999 crcansciencepubl https://doi.org/10.1139/f98-216 2024-04-18T06:54:53Z We quantified individual differences in Atlantic cod, Gadus morhua, reproductive behaviour at a field-reported spawning density under experimental conditions. Marked individuals (nine females, seven males) were observed twice daily and videotaped continuously for 9 weeks at ambient photoperiod and temperature in a large tank (60 m 3 ). Agonistic interactions appeared to maintain a size-based dominance hierarchy among males. Multiple paternity per spawning bout, revealed by microsatellite DNA analysis, suggested a link between dominance and fertilization success. Interactions between sexes were dominated by the circling of females by males. Predicated by vertical separation from males, and after descending to the bottom, a motionless female would be circled up to 17 times, often by one male per circling bout but by several males throughout the spawning period. Although circling frequency increased with male dominance and male body size, initiation and termination of this behaviour appeared to be under female control. Circling provides opportunities for males to gain individual access to reproductive females and for females to assess the quality of potential mates. Our evidence for nonrandom mate choice and for male-male competition and display has implications for Atlantic cod mating systems and effects of fishing on their reproductive success. Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 56 1 97 104 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Hutchings, Jeffrey A Bishop, Todd D McGregor-Shaw, Carolyn R Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We quantified individual differences in Atlantic cod, Gadus morhua, reproductive behaviour at a field-reported spawning density under experimental conditions. Marked individuals (nine females, seven males) were observed twice daily and videotaped continuously for 9 weeks at ambient photoperiod and temperature in a large tank (60 m 3 ). Agonistic interactions appeared to maintain a size-based dominance hierarchy among males. Multiple paternity per spawning bout, revealed by microsatellite DNA analysis, suggested a link between dominance and fertilization success. Interactions between sexes were dominated by the circling of females by males. Predicated by vertical separation from males, and after descending to the bottom, a motionless female would be circled up to 17 times, often by one male per circling bout but by several males throughout the spawning period. Although circling frequency increased with male dominance and male body size, initiation and termination of this behaviour appeared to be under female control. Circling provides opportunities for males to gain individual access to reproductive females and for females to assess the quality of potential mates. Our evidence for nonrandom mate choice and for male-male competition and display has implications for Atlantic cod mating systems and effects of fishing on their reproductive success. |
format |
Article in Journal/Newspaper |
author |
Hutchings, Jeffrey A Bishop, Todd D McGregor-Shaw, Carolyn R |
author_facet |
Hutchings, Jeffrey A Bishop, Todd D McGregor-Shaw, Carolyn R |
author_sort |
Hutchings, Jeffrey A |
title |
Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner |
title_short |
Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner |
title_full |
Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner |
title_fullStr |
Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner |
title_full_unstemmed |
Spawning behaviour of Atlantic cod, Gadus morhua : evidence of mate competition and mate choice in a broadcast spawner |
title_sort |
spawning behaviour of atlantic cod, gadus morhua : evidence of mate competition and mate choice in a broadcast spawner |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/f98-216 http://www.nrcresearchpress.com/doi/pdf/10.1139/f98-216 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 1, page 97-104 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f98-216 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
56 |
container_issue |
1 |
container_start_page |
97 |
op_container_end_page |
104 |
_version_ |
1798842963270303744 |