Density, abundance, survival, and ranging patterns of common bottlenose dolphins (Tursiops truncatus) in Mississippi Sound following the Deepwater Horizon oil spill

Autor: Todd Speakman, Keith D. Mullin, Trent L. McDonald, Eric S. Zolman, Randall S. Wells, Carrie Sinclair, Fawn E. Hornsby, Lori H. Schwacke, Brian C. Balmer, Krystan A. Wilkinson, Shauna M. McBride
Rok vydání: 2017
Předmět:
0106 biological sciences
Topography
Salinity
Marine and Aquatic Sciences
lcsh:Medicine
Biochemistry
Physical Chemistry
01 natural sciences
Population density
Geographical locations
Mississippi
Barrier island
Abundance (ecology)
Petroleum Pollution
lcsh:Science
Sound (geography)
Mammals
Islands
Gulf of Mexico
Multidisciplinary
geography.geographical_feature_category
Ecology
Oil Spills
Community structure
Eukaryota
Lipids
Bottle-Nosed Dolphin
Chemistry
Community Ecology
Deepwater horizon
Vertebrates
Physical Sciences
Engineering and Technology
Research Article
Freshwater Environments
Environmental Engineering
Bottle-nosed dolphin
Dolphins
Marine Biology
010603 evolutionary biology
Animals
Marine Mammals
Community Structure
Population Density
Landforms
geography
010604 marine biology & hydrobiology
Ecology and Environmental Sciences
lcsh:R
Organisms
Biology and Life Sciences
Aquatic Environments
Geomorphology
Bodies of Water
United States
Fishery
Lakes
Chemical Properties
Amniotes
North America
Oil spill
Earth Sciences
Environmental science
lcsh:Q
People and places
Oils
Zdroj: PLoS ONE, Vol 12, Iss 10, p e0186265 (2017)
PLoS ONE
ISSN: 1932-6203
Popis: After the Deepwater Horizon (DWH) oil spill began in April 2010, studies were initiated on northern Gulf of Mexico common bottlenose dolphins (Tursiops truncatus) in Mississippi Sound (MSS) to determine density, abundance, and survival, during and after the oil spill, and to compare these results to previous research in this region. Seasonal boat-based photo-identification surveys (2010-2012) were conducted in a section of MSS to estimate dolphin density and survival, and satellite-linked telemetry (2013) was used to determine ranging patterns. Telemetry suggested two different ranging patterns in MSS: (1) inshore waters with seasonal movements into mid-MSS, and (2) around the barrier islands exclusively. Based upon these data, dolphin density was estimated in two strata (Inshore and Island) using a spatially-explicit robust-design capture-recapture model. Inshore and Island density varied between 0.77-1.61 dolphins km-2 ([Formula: see text] = 1.42, 95% CI: 1.28-1.53) and 3.32-5.74 dolphins km-2 ([Formula: see text] = 4.43, 95% CI: 2.70-5.63), respectively. The estimated annual survival rate for dolphins with distinctive fins was very low in the year following the spill, 0.73 (95% CI: 0.67-0.78), and consistent with the occurrence of a large scale cetacean unusual mortality event that was in part attributed to the DWH oil spill. Fluctuations in density were not as large or seasonally consistent as previously reported. Total abundance for MSS extrapolated from density results ranged from 4,610 in July 2011 to 3,046 in January 2012 ([Formula: see text] = 3,469, 95% CI: 3,113-3,725).
Databáze: OpenAIRE
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