Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding
Lepeophtheirus salmonis (Kroyer) is an economically important pest on cultured salmonids in the North Atlantic, and has been implicated in declines of some wild salmonid populations. Males inseminate newly-moulted adult females following the cementing of a pair of spermatophores to the female's...
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/polyandry-in-an-ectoparasitic-copepod-lepeophtheirus-salmonis-kroeyer-despite-complex-precopulatory-and-postcopulatory-mate-guarding(7f0f0ae0-ac11-4dd4-a2ff-aa0cbf0e0513).html http://www.scopus.com/inward/record.url?scp=29244444548&partnerID=8YFLogxK |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/7f0f0ae0-ac11-4dd4-a2ff-aa0cbf0e0513 2023-05-15T15:31:51+02:00 Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding Todd, Christopher David Stevenson, R J Reinardy, H Ritchie, Michael Gordon 2005 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/polyandry-in-an-ectoparasitic-copepod-lepeophtheirus-salmonis-kroeyer-despite-complex-precopulatory-and-postcopulatory-mate-guarding(7f0f0ae0-ac11-4dd4-a2ff-aa0cbf0e0513).html http://www.scopus.com/inward/record.url?scp=29244444548&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Todd , C D , Stevenson , R J , Reinardy , H & Ritchie , M G 2005 , ' Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding ' , Marine Ecology Progress Series , vol. 303 , pp. 225-234 . paternity microsatellite spermatophore sea lice aquaculture salmonid integrated pest management FARMED ATLANTIC SALMON SALAR L. EPIDEMIOLOGIC PATTERNS PARASITIC COPEPODS PECTORALIS MULLER CALIGIDAE LOUSE KROYER SCOTLAND article 2005 ftunstandrewcris 2021-12-26T14:13:21Z Lepeophtheirus salmonis (Kroyer) is an economically important pest on cultured salmonids in the North Atlantic, and has been implicated in declines of some wild salmonid populations. Males inseminate newly-moulted adult females following the cementing of a pair of spermatophores to the female's genital complex. Females can produce multiple pairs of eggstrings over a period of months, but this species is reported to be monogamous as a result of blockage of the female's copulatory ducts by the spermatophore tubules. On wild and farmed Atlantic salmon Salmo salar L., respectively, 88 and 78% adult females sea lice bore the typical pair of spermatophores, while 11 and 19 % lacked spermatophores. A very few individuals (1 % wild, 3 % farmed) bore 3 or 4 spermatophores, showing that apparently successful multiple mating is possible. Multiple paternity was confirmed by dual-locus microsatellite typing of offspring for 3 of 7 females carrying 4 spermatophores, but also for 2 of 3 females carrying a single pair of spermatophores. Probably most females on wild fish lose their initial spermatophores and are polygamous during their extended ovigerous lifetime, although effective blockage of the copulatory ducts by the first male almost certainly assures single paternity of the first few pairs of eggstrings. The total level of polyandry or sperm competition faced by males may be relatively low. The ecological implications of multiple paternity are discussed within the context of integrated pest management as a strategy of ameliorating L. salmonis infestations impacting both wild and farmed salmonids. Article in Journal/Newspaper Atlantic salmon North Atlantic Salmo salar Copepods University of St Andrews: Research Portal |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
paternity microsatellite spermatophore sea lice aquaculture salmonid integrated pest management FARMED ATLANTIC SALMON SALAR L. EPIDEMIOLOGIC PATTERNS PARASITIC COPEPODS PECTORALIS MULLER CALIGIDAE LOUSE KROYER SCOTLAND |
spellingShingle |
paternity microsatellite spermatophore sea lice aquaculture salmonid integrated pest management FARMED ATLANTIC SALMON SALAR L. EPIDEMIOLOGIC PATTERNS PARASITIC COPEPODS PECTORALIS MULLER CALIGIDAE LOUSE KROYER SCOTLAND Todd, Christopher David Stevenson, R J Reinardy, H Ritchie, Michael Gordon Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding |
topic_facet |
paternity microsatellite spermatophore sea lice aquaculture salmonid integrated pest management FARMED ATLANTIC SALMON SALAR L. EPIDEMIOLOGIC PATTERNS PARASITIC COPEPODS PECTORALIS MULLER CALIGIDAE LOUSE KROYER SCOTLAND |
description |
Lepeophtheirus salmonis (Kroyer) is an economically important pest on cultured salmonids in the North Atlantic, and has been implicated in declines of some wild salmonid populations. Males inseminate newly-moulted adult females following the cementing of a pair of spermatophores to the female's genital complex. Females can produce multiple pairs of eggstrings over a period of months, but this species is reported to be monogamous as a result of blockage of the female's copulatory ducts by the spermatophore tubules. On wild and farmed Atlantic salmon Salmo salar L., respectively, 88 and 78% adult females sea lice bore the typical pair of spermatophores, while 11 and 19 % lacked spermatophores. A very few individuals (1 % wild, 3 % farmed) bore 3 or 4 spermatophores, showing that apparently successful multiple mating is possible. Multiple paternity was confirmed by dual-locus microsatellite typing of offspring for 3 of 7 females carrying 4 spermatophores, but also for 2 of 3 females carrying a single pair of spermatophores. Probably most females on wild fish lose their initial spermatophores and are polygamous during their extended ovigerous lifetime, although effective blockage of the copulatory ducts by the first male almost certainly assures single paternity of the first few pairs of eggstrings. The total level of polyandry or sperm competition faced by males may be relatively low. The ecological implications of multiple paternity are discussed within the context of integrated pest management as a strategy of ameliorating L. salmonis infestations impacting both wild and farmed salmonids. |
format |
Article in Journal/Newspaper |
author |
Todd, Christopher David Stevenson, R J Reinardy, H Ritchie, Michael Gordon |
author_facet |
Todd, Christopher David Stevenson, R J Reinardy, H Ritchie, Michael Gordon |
author_sort |
Todd, Christopher David |
title |
Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding |
title_short |
Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding |
title_full |
Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding |
title_fullStr |
Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding |
title_full_unstemmed |
Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding |
title_sort |
polyandry in an ectoparasitic copepod ( lepeophtheirus salmonis krøyer) despite complex precopulatory and postcopulatory mate guarding |
publishDate |
2005 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/polyandry-in-an-ectoparasitic-copepod-lepeophtheirus-salmonis-kroeyer-despite-complex-precopulatory-and-postcopulatory-mate-guarding(7f0f0ae0-ac11-4dd4-a2ff-aa0cbf0e0513).html http://www.scopus.com/inward/record.url?scp=29244444548&partnerID=8YFLogxK |
genre |
Atlantic salmon North Atlantic Salmo salar Copepods |
genre_facet |
Atlantic salmon North Atlantic Salmo salar Copepods |
op_source |
Todd , C D , Stevenson , R J , Reinardy , H & Ritchie , M G 2005 , ' Polyandry in an ectoparasitic copepod ( Lepeophtheirus salmonis Krøyer) despite complex precopulatory and postcopulatory mate guarding ' , Marine Ecology Progress Series , vol. 303 , pp. 225-234 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766362361368674304 |