Genomics of the Galápagos Petrel (Pterodroma phaeopygia) to Advance Conservation Genomics in a Critically Endangered Seabird
Isabella Sessi
Department of Biology
Faculty Supervisor: Jaime Chaves
The Galápagos Petrel (Pterodroma phaeopygia) is a critically endangered seabird endemic to the Galápagos Islands. Once abundant, its populations have sharply declined due to invasive predators, habitat degradation, and destruction of nest burrows. Despite breeding colonies on multiple islands, the genetic relationships among these populations remain poorly understood.
To support conservation research, we generated the first high-quality reference genome using ultra-long Oxford Nanopore sequencing from an adult female sampled on San Cristóbal Island. This genome provides a near-complete map of that individual's DNA and serves as a foundation for further genomic analyses of the species.
Using this reference, we are conducting population genomic analyses of 57 individuals from multiple islands to measure genetic diversity and evaluate population differentiation. These analyses help reveal how isolated or connected island populations are. Understanding patterns of genetic diversity and connectivity is critical for identifying vulnerable populations and guiding conservation strategies aimed at preserving this endangered seabird.