Multiple paternity is prevalent in Pacific ocean perch (Sebastes alutus) off the Oregon coast, and is correlated with female size and age |
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Authors: | Donald M Van Doornik Steven J Parker Steven R Millard Ewann A Berntson Paul Moran |
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Institution: | (1) National Marine Fisheries Service, Northwest Fisheries Science Center, Manchester Research Station, P.O. Box 130, Manchester, WA 98353, USA;(2) Oregon Department of Fish and Wildlife, Hatfield Marine Science Center, 2040 SE Marine Science Drive, Newport, OR 97365, USA;(3) Willamette University, 900 State Street, Salem, OR 97301, USA;(4) National Marine Fisheries Service, Northwest Fisheries Science Center, 2725 Montlake Boulevard East, Seattle, WA 98112, USA |
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Abstract: | The need to rebuild Pacific ocean perch, Sebastes alutus, populations on the west coast of the United States has precipitated a need to better understand the life history characteristics
of this rockfish species. One such characteristic is mating behavior, which has the potential to influence the amount of genetic
diversity in a population. We documented and examined the frequency of multiple mating in Pacific ocean perch collected off
the Oregon coast using five microsatellite loci. We found that 47 of 66 (71.2%) females examined had broods sired by multiple
males. The mean number of sires per brood was 1.92 (SD = 0.76) and ranged from 1–4. Polyandrous females were significantly
larger and had an older average age than monogamous females. Our results suggest that polyandrous behavior among female Pacific
ocean perch off the coast of Oregon is prevalent, is related to female size and age, and should be preserved by maintaining
a natural age structure in this population. |
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Keywords: | Polyandry Maternal age Rockfish Paternity analysis Mating system Microsatellite |
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