Population genomics reveals high gene flow in grass rockfish (Sebastes rastrelliger).

Variation at the genomic level is important for understanding a species' demographic and phylogenetic history, in addition to identifying candidate regions that may be under selection and important to local adaptation. We used restriction-site associated DNA (RAD) sequencing to sample single nucleotide polymorphisms (SNPs) from the grass rockfish genome (Sebastes rastrelliger) to assess range-wide patterns of population structure and test for signatures of selection (i.e.

Genetic assessment of a summer chum salmon metapopulation in recovery.

Programs to rebuild imperiled wild fish populations often include hatchery-born fish derived from wild populations to supplement natural spawner abundance. These programs require monitoring to determine their demographic, biological, and genetic effects. In 1990s in Washington State, the Summer Chum Salmon Conservation Initiative developed a recovery program for the threatened Hood Canal summer chum salmon Evolutionarily Significant Unit (ESU) (the metapopulation) that used in-river spawners (wild fish) for each respective supplementation broodstock in six tributaries.

Foraging patterns of acorn woodpeckers (Melanerpes formicivorus) on valley oak (Quercus lobata Née) in two California oak savanna-woodlands.

Landscape characteristics and social behavior can affect the foraging patterns of seed-dependent animals. We examine the movement of acorns from valley oak (Quercus lobata) trees to granaries maintained by acorn woodpeckers (Melanerpes formicivorus) in two California oak savanna-woodlands differing in the distribution of Q. lobata within each site.

[Atrioventricular septal defect. Anatomopathologic study and embryological correlation].

Atrioventricular septal defect is a complex congenital heart disease in which cardiac septation is deficient especially at atrioventricular and ventricular levels. The anatomopathologic experience at the National Institute of Cardiology "Ignacio Chávez" is described; an anatomo-embryological correlation was made to gain an insight of the pathogenesis. Seventy hearts were analyzed morphologically with the sequential segmentary system.