Vertebrate Species

California Gnatcatcher Genetic Study - FundSource 1 and 2

We examined individual relatedness patterns and population genetic structure among gnatcatcher aggregations throughout coastal southern California from Ventura to San Diego Counties. To accomplish this goal, we developed a set of highly polymorphic microsatellite loci and sampled 268 individuals throughout the range. With genetic analyses we addressed the following questions:1) How many genetically distinguishable populations exist across the U.S. species range?2) Is genetic relatedness among individuals explained by the amount and distribution of suitable habitat?3) What is the range of dispersal distances between presumptive siblings and parents/offspring?4) What are the patterns of genetic diversity within aggregations across the U.S. range and what is the effective population size?5) How do these results impact future management and monitoring efforts aimed at species recovery?
Project Groups

SDMMP7 California Gnatcatcher Genetic Study

Project Focus
Project type: Genetic study
Target vegetation: coastal sage scrub
Investigator: Barbara Kus; Amy Vandergast
Main implementing entity: U.S. Geological Survey
Point of contact: Amy Vandergast
SDMMP lead: Kris Preston
Study lead: Amy Vandergast
Project Protocol
Strategic Elements
Budget year: pre FY15-1
Project Location
County: Los Angeles, Orange, Riverside, San Bernardino, San Diego, Ventura
General: Central-central, Central-west, North-central, North-west, South-central, South-west
MU: 1, 10, 2, 3, 4, 5, 6, 7, 8, 9
Reports Available: Yes
Final Report Date: 2014-12-31