Presentation Abstract
Empirical data on recruitment and dispersal patterns of marine species can provide a scientific basis for conserving biodiversity and improving fisheries via marine reserves. We examined patterns of larval dispersal in brown rockfish (Sebastes auriculatus) using genetic markers (microsatellites). Tissue samples from 1,837 fish were collected in 2004 to 2009 from 18 sites in the Puget Sound, Washington. Genetic parentage analysis using maximum-likelihood and exclusion approaches identified seven offspring that assigned to a parent, with one offspring assigned to both parents. All offspring recruited and settled at the main study site, Point Heyer; four offspring originated from parents resident at Point Heyer and three from other locations 8 km to 20 km away. Kinship and population genetic structure analyses provided little evidence to reject the null hypothesis of panmixia, suggesting that recruitment to Point Heyer is largely random and that brown rockfish may be highly connected via dispersal in the south Puget Sound. In contrast to previous rockfish studies, there was no evidence for high variance in reproductive success from comparisons of heterozygosity and relatedness among samples of adults and Point Heyer recruits. These results indicate that random recruitment and high levels of gene flow are the predominant processes shaping patterns of brown rockfish larval dispersal in Puget Sound.
Session Title
Session S-10E: Evaluation, Conservation and Restoration of Species Associated with High-Relief, Rocky Habitat in the Salish Sea
Conference Track
Species and Food Webs
Conference Name
Salish Sea Ecosystem Conference (2014 : Seattle, Wash.)
Document Type
Event
Start Date
2-5-2014 1:30 PM
End Date
2-5-2014 3:00 PM
Location
Room 613-614
Genre/Form
conference proceedings; presentations (communicative events)
Contributing Repository
Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.
Subjects – Topical (LCSH)
Brown rockfish--Dispersal--Washington (State)--Puget Sound
Geographic Coverage
Puget Sound (Wash.); Salish Sea (B.C. and Wash.)
Rights
This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.
Type
Text
Language
English
Format
application/pdf
Included in
High connectivity among brown rockfish (Sebastes auriculatus) populations in Puget Sound: evidence from genetic parental identification, otolith microchemistry and oceanographic models
Room 613-614
Empirical data on recruitment and dispersal patterns of marine species can provide a scientific basis for conserving biodiversity and improving fisheries via marine reserves. We examined patterns of larval dispersal in brown rockfish (Sebastes auriculatus) using genetic markers (microsatellites). Tissue samples from 1,837 fish were collected in 2004 to 2009 from 18 sites in the Puget Sound, Washington. Genetic parentage analysis using maximum-likelihood and exclusion approaches identified seven offspring that assigned to a parent, with one offspring assigned to both parents. All offspring recruited and settled at the main study site, Point Heyer; four offspring originated from parents resident at Point Heyer and three from other locations 8 km to 20 km away. Kinship and population genetic structure analyses provided little evidence to reject the null hypothesis of panmixia, suggesting that recruitment to Point Heyer is largely random and that brown rockfish may be highly connected via dispersal in the south Puget Sound. In contrast to previous rockfish studies, there was no evidence for high variance in reproductive success from comparisons of heterozygosity and relatedness among samples of adults and Point Heyer recruits. These results indicate that random recruitment and high levels of gene flow are the predominant processes shaping patterns of brown rockfish larval dispersal in Puget Sound.
