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Dispersal and genetic structure of Boccardia polybranchia and Polydora hoplura (Annelida: Spionidae) in South Africa and their implications for aquaculture
Dispersal and observed genetic structure of sessile marine invertebrates such as the alien polydorid polychaete, Polydora hoplura, which is associated with cultured molluscs, may be influenced by biogeographic barriers and human-mediated dispersal. To test this hypothesis, we compared the population...
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Published in: | Aquaculture 2016-12, Vol.465, p.235-244 |
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description | Dispersal and observed genetic structure of sessile marine invertebrates such as the alien polydorid polychaete, Polydora hoplura, which is associated with cultured molluscs, may be influenced by biogeographic barriers and human-mediated dispersal. To test this hypothesis, we compared the population genetic structure of P. hoplura to that of Boccardia polybranchia since both species have similar larval developmental modes (and consequently natural dispersal potential) and distribution ranges in southern Africa. However, since B. polybranchia is not a pest, its population structure should reflect the effects of only biogeographic barriers on natural dispersal. Boccardia polybranchia was collected from five wild sites along the South African coast, and P. hoplura from seven wild sites and four oyster farms; two each were on-shore and off-shore. Analyses of mtDNA Cyt b sequence data indicate two distinct lineages for B. polybranchia, supporting Cape Point as a biogeographic barrier to the dispersal of larvae. In contrast, no distinct geographic lineages were identified for P. hoplura occurring in the wild, and haplotype sharing suggest possible cross infestation between farm and nearby wild sites. At farms the genetic diversity of P. hoplura is lower but also more structured, suggesting separate anthropogenic introductions at each site possibly from genetically distinct source populations. Furthermore, more limited genetic sharing was detected between worms from on-shore and nearby wild sites, whereas the opposite was observed for off-shore farms and associated wild sites. This suggests that populations in on-shore farms are more contained with most of the individuals carrying parasites corresponding to the source of introduction while those on off-shore farms display much more genetic exchange with wild populations. Thus oysters in off-shore facilities are probably more vulnerable to infestation by polydorid pests than are those in on-shore facilities.
Movement of oysters spreads associated pests
•Genetic data suggest the human-mediated dispersal of oyster shell-boring polydorids.•Various dispersal pathways contribute to overall genetic structure of shell-borer.•Distinct biogeographic lineages detected for nonshell-borer, none for shell-borer.•Oysters cultured offshore are highly susceptible to infestation by polydorid larvae. |
doi_str_mv | 10.1016/j.aquaculture.2016.09.001 |
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Movement of oysters spreads associated pests
•Genetic data suggest the human-mediated dispersal of oyster shell-boring polydorids.•Various dispersal pathways contribute to overall genetic structure of shell-borer.•Distinct biogeographic lineages detected for nonshell-borer, none for shell-borer.•Oysters cultured offshore are highly susceptible to infestation by polydorid larvae.</description><identifier>ISSN: 0044-8486</identifier><identifier>EISSN: 1873-5622</identifier><identifier>DOI: 10.1016/j.aquaculture.2016.09.001</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Annelida ; Annelids ; Aquaculture ; Biogeography ; Boccardia polybranchia ; Dispersal ; Genetic diversity ; Human-mediated dispersal ; Invasive ; Marine ; Mitochondrial DNA ; Mollusca ; Pest polydorids ; Phylogeography ; Polybranchia ; Polydora hoplura ; Population genetics ; Spionidae</subject><ispartof>Aquaculture, 2016-12, Vol.465, p.235-244</ispartof><rights>2016 Elsevier B.V.</rights><rights>Copyright Elsevier Sequoia S.A. Dec 1, 2016</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c433t-e5627f0f1a9c3527ce19399c61377dc1087e01d4fc3ebfa9c9d38fa657545c823</citedby><cites>FETCH-LOGICAL-c433t-e5627f0f1a9c3527ce19399c61377dc1087e01d4fc3ebfa9c9d38fa657545c823</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Williams, L.</creatorcontrib><creatorcontrib>Matthee, C.A.</creatorcontrib><creatorcontrib>Simon, C.A.</creatorcontrib><title>Dispersal and genetic structure of Boccardia polybranchia and Polydora hoplura (Annelida: Spionidae) in South Africa and their implications for aquaculture</title><title>Aquaculture</title><description>Dispersal and observed genetic structure of sessile marine invertebrates such as the alien polydorid polychaete, Polydora hoplura, which is associated with cultured molluscs, may be influenced by biogeographic barriers and human-mediated dispersal. To test this hypothesis, we compared the population genetic structure of P. hoplura to that of Boccardia polybranchia since both species have similar larval developmental modes (and consequently natural dispersal potential) and distribution ranges in southern Africa. However, since B. polybranchia is not a pest, its population structure should reflect the effects of only biogeographic barriers on natural dispersal. Boccardia polybranchia was collected from five wild sites along the South African coast, and P. hoplura from seven wild sites and four oyster farms; two each were on-shore and off-shore. Analyses of mtDNA Cyt b sequence data indicate two distinct lineages for B. polybranchia, supporting Cape Point as a biogeographic barrier to the dispersal of larvae. In contrast, no distinct geographic lineages were identified for P. hoplura occurring in the wild, and haplotype sharing suggest possible cross infestation between farm and nearby wild sites. At farms the genetic diversity of P. hoplura is lower but also more structured, suggesting separate anthropogenic introductions at each site possibly from genetically distinct source populations. Furthermore, more limited genetic sharing was detected between worms from on-shore and nearby wild sites, whereas the opposite was observed for off-shore farms and associated wild sites. This suggests that populations in on-shore farms are more contained with most of the individuals carrying parasites corresponding to the source of introduction while those on off-shore farms display much more genetic exchange with wild populations. Thus oysters in off-shore facilities are probably more vulnerable to infestation by polydorid pests than are those in on-shore facilities.
Movement of oysters spreads associated pests
•Genetic data suggest the human-mediated dispersal of oyster shell-boring polydorids.•Various dispersal pathways contribute to overall genetic structure of shell-borer.•Distinct biogeographic lineages detected for nonshell-borer, none for shell-borer.•Oysters cultured offshore are highly susceptible to infestation by polydorid larvae.</description><subject>Annelida</subject><subject>Annelids</subject><subject>Aquaculture</subject><subject>Biogeography</subject><subject>Boccardia polybranchia</subject><subject>Dispersal</subject><subject>Genetic diversity</subject><subject>Human-mediated dispersal</subject><subject>Invasive</subject><subject>Marine</subject><subject>Mitochondrial DNA</subject><subject>Mollusca</subject><subject>Pest polydorids</subject><subject>Phylogeography</subject><subject>Polybranchia</subject><subject>Polydora hoplura</subject><subject>Population genetics</subject><subject>Spionidae</subject><issn>0044-8486</issn><issn>1873-5622</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqNkc1uFDEQhC0EEkvgHYy4hMMM9nh-PNyWJQlIkYiUcLacdpv1atae2B6kPAsvG4-WQ8SJU9ulr1pdKkLec1ZzxvtPh1o_LBqWKS8R66ZINRtrxvgLsuFyEFXXN81LsmGsbSvZyv41eZPSgTHW9x3fkD9fXZoxJj1R7Q39hR6zA5pyXGBdSYOlXwKAjsZpOofp8T5qD_vyWfmbIpgQNd2HeVrKPN96j5Mz-jO9nV3w5YUfqfP0Nix5T7c2OjhZ8x5dpO44T0XJBU3UhkifxXlLXlk9JXz3d56Rn5cXd7tv1fWPq--77XUFrRC5whJxsMxyPYLomgGQj2IcoediGAxwJgdk3LQWBN7bAo1GSKv7bujaDmQjzsj5ae8cw8OCKaujS4DTpD2GJSkuxSBYJ3tZ0A__oIewRF-uW6lGMi64KNR4oiCGlCJaNUd31PFRcabW2tRBPcup1toUG1WprXh3Jy-WxL8dRpXAoQc0LiJkZYL7jy1PNGaptQ</recordid><startdate>20161201</startdate><enddate>20161201</enddate><creator>Williams, L.</creator><creator>Matthee, C.A.</creator><creator>Simon, C.A.</creator><general>Elsevier B.V</general><general>Elsevier Sequoia S.A</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7QR</scope><scope>7ST</scope><scope>7TN</scope><scope>7U7</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H94</scope><scope>H95</scope><scope>H98</scope><scope>H99</scope><scope>L.F</scope><scope>L.G</scope><scope>M7N</scope><scope>P64</scope><scope>SOI</scope><scope>RC3</scope></search><sort><creationdate>20161201</creationdate><title>Dispersal and genetic structure of Boccardia polybranchia and Polydora hoplura (Annelida: Spionidae) in South Africa and their implications for aquaculture</title><author>Williams, L. ; Matthee, C.A. ; Simon, C.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c433t-e5627f0f1a9c3527ce19399c61377dc1087e01d4fc3ebfa9c9d38fa657545c823</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Annelida</topic><topic>Annelids</topic><topic>Aquaculture</topic><topic>Biogeography</topic><topic>Boccardia polybranchia</topic><topic>Dispersal</topic><topic>Genetic diversity</topic><topic>Human-mediated dispersal</topic><topic>Invasive</topic><topic>Marine</topic><topic>Mitochondrial DNA</topic><topic>Mollusca</topic><topic>Pest polydorids</topic><topic>Phylogeography</topic><topic>Polybranchia</topic><topic>Polydora hoplura</topic><topic>Population genetics</topic><topic>Spionidae</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Williams, L.</creatorcontrib><creatorcontrib>Matthee, C.A.</creatorcontrib><creatorcontrib>Simon, C.A.</creatorcontrib><collection>CrossRef</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Chemoreception Abstracts</collection><collection>Environment Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Aquaculture Abstracts</collection><collection>ASFA: Marine Biotechnology Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Marine Biotechnology Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Genetics Abstracts</collection><jtitle>Aquaculture</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Williams, L.</au><au>Matthee, C.A.</au><au>Simon, C.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dispersal and genetic structure of Boccardia polybranchia and Polydora hoplura (Annelida: Spionidae) in South Africa and their implications for aquaculture</atitle><jtitle>Aquaculture</jtitle><date>2016-12-01</date><risdate>2016</risdate><volume>465</volume><spage>235</spage><epage>244</epage><pages>235-244</pages><issn>0044-8486</issn><eissn>1873-5622</eissn><abstract>Dispersal and observed genetic structure of sessile marine invertebrates such as the alien polydorid polychaete, Polydora hoplura, which is associated with cultured molluscs, may be influenced by biogeographic barriers and human-mediated dispersal. To test this hypothesis, we compared the population genetic structure of P. hoplura to that of Boccardia polybranchia since both species have similar larval developmental modes (and consequently natural dispersal potential) and distribution ranges in southern Africa. However, since B. polybranchia is not a pest, its population structure should reflect the effects of only biogeographic barriers on natural dispersal. Boccardia polybranchia was collected from five wild sites along the South African coast, and P. hoplura from seven wild sites and four oyster farms; two each were on-shore and off-shore. Analyses of mtDNA Cyt b sequence data indicate two distinct lineages for B. polybranchia, supporting Cape Point as a biogeographic barrier to the dispersal of larvae. In contrast, no distinct geographic lineages were identified for P. hoplura occurring in the wild, and haplotype sharing suggest possible cross infestation between farm and nearby wild sites. At farms the genetic diversity of P. hoplura is lower but also more structured, suggesting separate anthropogenic introductions at each site possibly from genetically distinct source populations. Furthermore, more limited genetic sharing was detected between worms from on-shore and nearby wild sites, whereas the opposite was observed for off-shore farms and associated wild sites. This suggests that populations in on-shore farms are more contained with most of the individuals carrying parasites corresponding to the source of introduction while those on off-shore farms display much more genetic exchange with wild populations. Thus oysters in off-shore facilities are probably more vulnerable to infestation by polydorid pests than are those in on-shore facilities.
Movement of oysters spreads associated pests
•Genetic data suggest the human-mediated dispersal of oyster shell-boring polydorids.•Various dispersal pathways contribute to overall genetic structure of shell-borer.•Distinct biogeographic lineages detected for nonshell-borer, none for shell-borer.•Oysters cultured offshore are highly susceptible to infestation by polydorid larvae.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.aquaculture.2016.09.001</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Annelida Annelids Aquaculture Biogeography Boccardia polybranchia Dispersal Genetic diversity Human-mediated dispersal Invasive Marine Mitochondrial DNA Mollusca Pest polydorids Phylogeography Polybranchia Polydora hoplura Population genetics Spionidae |
title | Dispersal and genetic structure of Boccardia polybranchia and Polydora hoplura (Annelida: Spionidae) in South Africa and their implications for aquaculture |
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