Program and Agenda

Abstract

UPDATES ON AN ONGOING PACIFIC COAST-WIDE SEA STAR EPIZOOTIC

A sea star wasting disase epizootic was first noted in June 2013 and continues to present (February 2014) and involves 12 species of sea stars (Asteroidea) on the Pacific Coast. This is leading to localized mass mortality events in some species and locations. The dominant species affected are Pycnopodia helianthoides, Evasterias troschelli and Pisaster ochraceus. Mortalities and signs of wasting were first reported in Pisaster ochraceus on the outer coast of Washington State, followed by mass mortality of Pycnopodia helianthoides north of Vancouver BC. By mid September, Pisaster ochraceus were affected in Central California and a mass mortality event involving 12 species of stars occurred in November in Central California. Localized mass mortality events continue in Washington State, British Columbia, Central and southern California waters. Diversity of viruses and bacteria in diseased and healthy sea stars are being investigated in the Hewson lab using metagenomics, community fingerprinting of bacteria and quantification of constituent genotypes. Histology and preliminary bacterial metagenomics allows us to rule out fungi, protozoans, larger parasites and ricketsial bacteria as causative. Infection experiments are underway to test different fractions.

ePoster:

Authors

Harvell, C. D., Cornell UNiversity, USA, cdh5@cornell.edu

Burge, C., Cornell UNiversity, USA, Colleen Burge

Eisenlord, M., Friday Harbor Lab, USA,

Haulena, M., Vancouver Aquarium, USA,

Lahner, L., Seattle Aquarium, USA

Details

Poster presentation

Session #:078
Date: 2/27/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 312