Presentation Abstract

Session: P-004-Integrated Understanding of the Impacts of the DWH Oil Spill on Fisheries: Exposure Vectors, Biological-Physiological Effects and Abundance of Fisheries Populations
Monday, Jan 27, 2014, 6:00 PM - 8:00 PM
Presentation: 162 - Did the Growth Rates of Gulf of Mexico Red Snapper, Lutjanus campechanus, Change Following the 2010 Deepwater Horizon Blowout?
Location: Main Ballroom (Convention Center), Poster Board: 4-145
Pres. Time: Monday, Jan 27, 2014, 6:00 PM - 8:00 PM
Keywords: fish; growth rate; red snapper
Author(s): E. Herdter, S. Murawski;
University of South Florida, St. Petersburg, FL.
Abstract: Red snapper, Lutjanus campechanus, is a long-lived, reef finfish and an important commercial and recreational species in the Gulf of Mexico (GOM). Mature individuals between ages 2 and 8 inhabit much of the shallow-water oil infrastructure in the northern Gulf of Mexico. Because of their close proximity to oil infrastructure, they are particularly vulnerable to oil contamination, and much of their range in the northern GOM overlaps the surface oil distribution from the 2010 Deepwater Horizon blowout. Previous research on acute oil contamination in juvenile fish has shown significant decreases in weight, growth and condition indices- all factors tied to population productivity. The goal of this study is to understand annual growth rate variation before and after 2010 in GOM red snapper through increment analysis of sagittal otoliths collected between 2011-2013 via scientific demersal long-line sampling. The measured annual growth increments, and ancillary environmental data including GOM wind direction and speed and sea surface temperature data obtained from the NOAA World Ocean Atlas, will be treated with an ANOVA to determine the significance of variation in annual growth rates by age, and year and relationships to these exogenous environmental parameters. Preliminary results indicate a decline in growth rate at age during 2010-2011 and the following years.