Information on drivers of dispersal is critical for wildlife conservation but is rare for long-lived marine mammal species with large geographic ranges. We fit multi-state mark-recapture models to resighting data of 369 known-aged Steller sea lion (Eumetopias jubatus) females marked as pups on their natal rookeries in southeastern Alaska from 1994-2005 and monitored from 2001-15. We estimated probabilities of females being first observed parous at their natal site (natal philopatry), and of not moving breeding...
Apex predators may influence carnivore communities through the suppression of competitively dominant mesopredators, however they also provide carrion subsidies that could influence foraging and competition among sympatric mesopredators when small prey is scarce. We assessed coyote Canis latrans and red fox Vulpes vulpes winter diet overlap and composition from scats collected in two study areas with >3-fold difference in grey wolf Canis lupus density due to a wolf control program. We hypothesized that differences in...
Data from: Evidence for interannual variation in genetic structure of Dungeness crab (Cancer magister) along the California Current SystemTyler M. Jackson, G. Curtis Roegner & Kathleen G. O'Malley
Using a combination of population- and individual-based analytical approaches, we provide a comprehensive examination of genetic connectivity of Dungeness crab (Cancer magister) along ~1,200 km of the California Current System (CCS). We sampled individuals at 33 sites in 2012 to establish a baseline of genetic diversity and hierarchal population genetic structure, and then assessed inter-annual variability in our estimates by sampling again in 2014. Genetic diversity showed little variation among sites or across years. In...
Data from: Spatio-temporal models reveal subtle changes to demersal communities following the Exxon Valdez oil spillAndrew O. Shelton, Mary E. Hunsicker, Eric J. Ward, Blake E. Feist, Rachael Blake, Colette L. Ward, Benjamin C. Williams, Janet T. Duffy-Anderson, Anne B. Hollowed & Alan C. Haynie
Toxic pollutants such as crude oil have direct negative effects for a wide array of marine life. While mortality from acute exposure to oil is obvious, sub-lethal consequences of exposure to petroleum derivatives for growth and reproduction are less evident and sub-lethal effects in fish populations are obscured by natural environmental variation, fishing, and measurement error. We use fisheries independent surveys in the Gulf of Alaska to examine the consequences of the 1989 Exxon Valdez...
Data from: Comparative landscape genetic analysis of three Pacific salmon species from subarctic North AmericaJeffrey B. Olsen, Penelope A. Crane, Blair G. Flannery, Karen Dunmall, William D. Templin & John K. Wenburg
We examined the assumption that landscape heterogeneity similarly influences the spatial distribution of genetic diversity in closely related and geographically overlapping species. Accordingly, we evaluated the influence of watershed affiliation and nine habitat variables from four categories (spatial isolation, habitat size, climate, and ecology) on population divergence in three species of Pacific salmon (Oncorhynchus tshawytscha, O. kisutch, and O. keta) from three contiguous watersheds in subarctic North America. By incorporating spatial data we found that...
Alaska Department of Fish and Game5
National Marine Fisheries Service2
University of Washington1
Oregon State University1
Alaska Fisheries Science Center1
University of Alaska System1
University of Northern British Columbia1
Boise State University1
University of California, Santa Barbara1
United States Fish and Wildlife Service1