The origin, evolution, and diversification of rockfishes of the genus Sebastes (Cuvier)

Hyde, John R.; Vetter, Russell D.

doi:10.1016/j.ympev.2006.12.026

Cited by 181 publications

(288 citation statements)

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“…Rockfishes recruit from the plankton to shallow [18]. Individuals may also recruit to new depth habitats created by sea level fluctuations [16]. This spatial separation may result in individuals reproducing, and populations establishing, in separate habitats.…”

Section: Discussionmentioning

confidence: 99%

“…This considerable diversity in the absence of geographical barriers has sparked interest in the factors promoting speciation in Sebastes [16,18 -20]. A recent comprehensive molecular phylogenetic appraisal of the genus [16] figure S1). While rockfishes have a pelagic larval phase and are capable of long-distance dispersal, local recruitment of larvae and site fidelity of adults can permit genetic structure within species (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Speciation along a depth gradient in a marine adaptive radiation

2010

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Oceans are home to much of the world's biodiversity, but we know little about the processes driving speciation in marine ecosystems with few geographical barriers to gene flow. Ecological speciation resulting from divergent natural selection between ecological niches can occur in the face of gene flow. Sister species in the young and ecologically diverse rockfish genus Sebastes coexist in the northeast Pacific, implying that speciation may not require geographical isolation. Here, I use a novel phylogenetic comparative analysis to show that rockfish speciation is instead associated with divergence in habitat depth and depth-associated morphology, consistent with models of parapatric speciation. Using the same analysis, I find no support for alternative hypotheses that speciation involves divergence in diet or life history, or that speciation involves geographic isolation by latitude. These findings support the hypothesis that rockfishes undergo ecological speciation on an environmental gradient.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Speciation along a depth gradient in a marine adaptive radiation

2010

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“…With the publication of mitochondrial and nuclear sequences from 105 of the 110 then-described Sebastes species (Taylor et al, 2004;Hyde et al, 2007), it became possible to identify larval juveniles at any size. Sequence-based identification methods have been previously used to identify morphologically unidentifiable rockfish larvae and to relate distributions of these larvae to oceanographic features and natal habitat (Taylor et al, 2004;Hitchman et al, 2012;Thompson et al, 2016;Thompson et al, 2017), to describe the early development of larval rockfishes , and to describe the early life history among lesser-known species (Yu et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Because some closely related groups of rockfishes are still undergoing lineage sorting (Hyde and Vetter, 2007) or may experience mtDNA introgression (Pearse et al, 2007), it was not possible to confidently identify some individuals to species. In our sampling, the WEVZ complex represented a substantial proportion of the larval catch, and is a still-unresolved diversity of species.…”

Section: Discussionmentioning

confidence: 99%

“…On average, 26% of the individual rockfish from each haul were sampled for genetic material to obtain a representative sample of catch. Total genomic DNA was extracted by using a glass-fiber plate extraction protocol (Ivanova et al, 2006). Polymerase chain reaction (PCR) was used to amplify a 782-base-pair (bp) fragment of the mitochondrial DNA (mtDNA) cytochrome b gene by using previously published GluRF and CB3RF primers (Rocha-Olivares et al, 1999).…”

Section: Dna Extraction and Data Collectionmentioning

confidence: 99%

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Seasonal distribution of late larval and juvenile rockfish (Sebastes spp.) and associated environmental conditions off Oregon and Washington: new insights based on genetics

Johansson¹,

Litz²,

Brodeur³

et al. 2018

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Abstract-Surveys of juvenile and larval stages can be useful for management of commercially important marine fishes but require definitive species identification. From May through October 2005October -2008 trawls collected 78,407 late-larval and juvenile rockfish (Sebastes spp.) in shelf and slope waters off Oregon and Washington. Because of their small size and lack of pigmentation, we could identify only 4.1% (3266 individuals) of sampled rockfishes to species morphologically, representing a total of 17 species. An additional subsample (2534 individuals), representing 24 species and a 4-species complex, was identified by sequencing the mitochondrial cytochrome b gene and matching sequences to a reference data set. Incomplete overlap between identified species meant that a total of 29 species were identified overall. Community analyses showed that rockfish collected during the early upwelling season (May-June) were distinct from samples collected in the late upwelling season (July-October). Most rockfish were collected from outer-shelf or upper-slope stations, but distributions varied by month and year. Combining genetic and morphological identifications vastly improved our ability to assess seasonal distributions and abundances of planktonic rockfishes and is a step toward performing species-level surveys for this speciose and commercially important genus. Definitive identification based on visual and molecular methods as used here provides key information to enhance understanding of early-stage rockfish ecology.

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Fishes of the World

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The origin, evolution, and diversification of rockfishes of the genus Sebastes (Cuvier)

Cited by 181 publications

References 77 publications

Speciation along a depth gradient in a marine adaptive radiation

Speciation along a depth gradient in a marine adaptive radiation

Seasonal distribution of late larval and juvenile rockfish (Sebastes spp.) and associated environmental conditions off Oregon and Washington: new insights based on genetics

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