Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean.
Capelin (Mallotus villosus) is a commercially exploited, key forage-fish species found in the boreal waters of the North Pacific and North Atlantic Oceans. We examined the population structure of capelin throughout their range in the Canadian northwest Atlantic Ocean using genetic-based methods. Cap...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2015-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4378951?pdf=render |
| _version_ | 1818982557254942720 |
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| author | Ellen L Kenchington Brian S Nakashima Christopher T Taggart Lorraine C Hamilton |
| author_facet | Ellen L Kenchington Brian S Nakashima Christopher T Taggart Lorraine C Hamilton |
| author_sort | Ellen L Kenchington |
| collection | DOAJ |
| description | Capelin (Mallotus villosus) is a commercially exploited, key forage-fish species found in the boreal waters of the North Pacific and North Atlantic Oceans. We examined the population structure of capelin throughout their range in the Canadian northwest Atlantic Ocean using genetic-based methods. Capelin collected at ten beach and five demersal spawning locations over the period 2002 through 2008 (N = 3,433 fish) were genotyped using six polymorphic microsatellite loci. Temporally distinct samples were identified at three beach spawning locations: Chance Cove, Little Lawn and Straitsview, Newfoundland. Four capelin stocks are assumed for fisheries management in the northwest Atlantic Ocean based on meristics, morphometrics, tag returns, and seasonal distribution patterns. Our results suggested groupings that were somewhat different than the assumed structure, and indicate at least seven genetically defined populations arising from two ancestral populations. The spatial mosaic of capelin from each of the two basal cluster groups explains much of the observed geographic variability amongst neighbouring samples. The genetic-defined populations were resolved at Jost's Dest ≥ 0.01 and were composed of fish collected 1) in the Gulf of St. Lawrence, 2) along the south and east coasts of Newfoundland, 3) along coastal northern Newfoundland and southern Labrador, 4) along coastal northern Labrador, 5) near the Saguenay River, and at two nearshore demersal spawning sites, 6) one at Grebes Nest off Bellevue Beach on the east coast of Newfoundland, and 7) one off the coast of Labrador at Domino Run. Moreover, the offshore demersal spawners on the Scotian Shelf and Southeast Shoal appeared to be related to the inshore demersal spawners at Grebes Nest and in Domino Run and to beach spawners from the Gulf of St. Lawrence. |
| first_indexed | 2024-12-20T17:49:06Z |
| format | Article |
| id | doaj.art-2bd7420c910045a4bcedc7d91096b384 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-20T17:49:06Z |
| publishDate | 2015-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-2bd7420c910045a4bcedc7d91096b3842022-12-21T19:30:53ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01103e012231510.1371/journal.pone.0122315Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean.Ellen L KenchingtonBrian S NakashimaChristopher T TaggartLorraine C HamiltonCapelin (Mallotus villosus) is a commercially exploited, key forage-fish species found in the boreal waters of the North Pacific and North Atlantic Oceans. We examined the population structure of capelin throughout their range in the Canadian northwest Atlantic Ocean using genetic-based methods. Capelin collected at ten beach and five demersal spawning locations over the period 2002 through 2008 (N = 3,433 fish) were genotyped using six polymorphic microsatellite loci. Temporally distinct samples were identified at three beach spawning locations: Chance Cove, Little Lawn and Straitsview, Newfoundland. Four capelin stocks are assumed for fisheries management in the northwest Atlantic Ocean based on meristics, morphometrics, tag returns, and seasonal distribution patterns. Our results suggested groupings that were somewhat different than the assumed structure, and indicate at least seven genetically defined populations arising from two ancestral populations. The spatial mosaic of capelin from each of the two basal cluster groups explains much of the observed geographic variability amongst neighbouring samples. The genetic-defined populations were resolved at Jost's Dest ≥ 0.01 and were composed of fish collected 1) in the Gulf of St. Lawrence, 2) along the south and east coasts of Newfoundland, 3) along coastal northern Newfoundland and southern Labrador, 4) along coastal northern Labrador, 5) near the Saguenay River, and at two nearshore demersal spawning sites, 6) one at Grebes Nest off Bellevue Beach on the east coast of Newfoundland, and 7) one off the coast of Labrador at Domino Run. Moreover, the offshore demersal spawners on the Scotian Shelf and Southeast Shoal appeared to be related to the inshore demersal spawners at Grebes Nest and in Domino Run and to beach spawners from the Gulf of St. Lawrence.http://europepmc.org/articles/PMC4378951?pdf=render |
| spellingShingle | Ellen L Kenchington Brian S Nakashima Christopher T Taggart Lorraine C Hamilton Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean. PLoS ONE |
| title | Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean. |
| title_full | Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean. |
| title_fullStr | Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean. |
| title_full_unstemmed | Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean. |
| title_short | Genetic structure of capelin (Mallotus villosus) in the northwest Atlantic Ocean. |
| title_sort | genetic structure of capelin mallotus villosus in the northwest atlantic ocean |
| url | http://europepmc.org/articles/PMC4378951?pdf=render |
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