Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus)
Abstract Little is known about intraspecific variation within the deacon rockfish (Sebastes diaconus), a recently described species found in the northeast Pacific Ocean. We investigated population structure among fish sampled from two nearshore reefs (Siletz Reef and Seal Rock) and one offshore site...
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doaj-0cce013899434b12bb316a5cf441ec552021-03-02T07:17:28ZengWileyEcology and Evolution2045-77582019-12-01923131531317310.1002/ece3.5763Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus)Felix Vaux0Leif K. Rasmuson1Lisa A. Kautzi2Polly S. Rankin3Matthew T. O. Blume4Kelly A. Lawrence5Sandra Bohn6Kathleen G. O'Malley7State Fisheries Genomics Lab Coastal Oregon Marine Experiment Station Department of Fisheries and Wildlife Hatfield Marine Science Center Oregon State University Newport OR USAMarine Resources Program Oregon Department of Fish and Wildlife Newport OR USAMarine Resources Program Oregon Department of Fish and Wildlife Newport OR USAMarine Resources Program Oregon Department of Fish and Wildlife Newport OR USAMarine Resources Program Oregon Department of Fish and Wildlife Newport OR USAMarine Resources Program Oregon Department of Fish and Wildlife Newport OR USAState Fisheries Genomics Lab Coastal Oregon Marine Experiment Station Department of Fisheries and Wildlife Hatfield Marine Science Center Oregon State University Newport OR USAState Fisheries Genomics Lab Coastal Oregon Marine Experiment Station Department of Fisheries and Wildlife Hatfield Marine Science Center Oregon State University Newport OR USAAbstract Little is known about intraspecific variation within the deacon rockfish (Sebastes diaconus), a recently described species found in the northeast Pacific Ocean. We investigated population structure among fish sampled from two nearshore reefs (Siletz Reef and Seal Rock) and one offshore site (Stonewall Bank) within a <50‐km2 area off the Oregon coast. Fish from the three sample sites exhibited small but statistically significant differences based on genetic variation at >15,000 neutral loci, whether analyzed independently or classified into nearshore and offshore groups. Male and females were readily distinguished using genetic data and 92 outlier loci were associated with sex, potentially indicating differential selection between males and females. Morphometric results indicated that there was significant secondary sexual dimorphism in otolith shape, but further sampling is required to disentangle potential confounding influence of age. This study is the first step toward understanding intraspecific variation within the deacon rockfish and the potential management implications. Since differentiation among the three sample sites was small, we consider the results to be suggestive of a single stock. However, future studies should evaluate how the stock is affected by differences in sex, age, and gene flow between the nearshore and offshore environments.https://doi.org/10.1002/ece3.5763genotyping by sequencinggeometric morphometricpopulation geneticsexual conflictsexual dimorphismstock assessment |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Felix Vaux Leif K. Rasmuson Lisa A. Kautzi Polly S. Rankin Matthew T. O. Blume Kelly A. Lawrence Sandra Bohn Kathleen G. O'Malley |
spellingShingle |
Felix Vaux Leif K. Rasmuson Lisa A. Kautzi Polly S. Rankin Matthew T. O. Blume Kelly A. Lawrence Sandra Bohn Kathleen G. O'Malley Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus) Ecology and Evolution genotyping by sequencing geometric morphometric population genetic sexual conflict sexual dimorphism stock assessment |
author_facet |
Felix Vaux Leif K. Rasmuson Lisa A. Kautzi Polly S. Rankin Matthew T. O. Blume Kelly A. Lawrence Sandra Bohn Kathleen G. O'Malley |
author_sort |
Felix Vaux |
title |
Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus) |
title_short |
Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus) |
title_full |
Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus) |
title_fullStr |
Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus) |
title_full_unstemmed |
Sex matters: Otolith shape and genomic variation in deacon rockfish (Sebastes diaconus) |
title_sort |
sex matters: otolith shape and genomic variation in deacon rockfish (sebastes diaconus) |
publisher |
Wiley |
series |
Ecology and Evolution |
issn |
2045-7758 |
publishDate |
2019-12-01 |
description |
Abstract Little is known about intraspecific variation within the deacon rockfish (Sebastes diaconus), a recently described species found in the northeast Pacific Ocean. We investigated population structure among fish sampled from two nearshore reefs (Siletz Reef and Seal Rock) and one offshore site (Stonewall Bank) within a <50‐km2 area off the Oregon coast. Fish from the three sample sites exhibited small but statistically significant differences based on genetic variation at >15,000 neutral loci, whether analyzed independently or classified into nearshore and offshore groups. Male and females were readily distinguished using genetic data and 92 outlier loci were associated with sex, potentially indicating differential selection between males and females. Morphometric results indicated that there was significant secondary sexual dimorphism in otolith shape, but further sampling is required to disentangle potential confounding influence of age. This study is the first step toward understanding intraspecific variation within the deacon rockfish and the potential management implications. Since differentiation among the three sample sites was small, we consider the results to be suggestive of a single stock. However, future studies should evaluate how the stock is affected by differences in sex, age, and gene flow between the nearshore and offshore environments. |
topic |
genotyping by sequencing geometric morphometric population genetic sexual conflict sexual dimorphism stock assessment |
url |
https://doi.org/10.1002/ece3.5763 |
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