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Abundance and Size of Gulf Shrimp in Louisiana's Coastal Estuaries following the Deepwater Horizon Oil Spill

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dc.contributor.author van der Ham, Joris L.
dc.contributor.author de Mutsert, Kim
dc.date.accessioned 2015-09-23T15:25:02Z
dc.date.available 2015-09-23T15:25:02Z
dc.date.issued 2014-10-01
dc.identifier.citation van der Ham JL, de Mutsert K (2014) Abundance and Size of Gulf Shrimp in Louisiana's Coastal Estuaries following the Deepwater Horizon Oil Spill. PLoS ONE 9(10): e108884. doi:10.1371/journal.pone.0108884 en_US
dc.identifier.uri https://hdl.handle.net/1920/9900
dc.description.abstract The Deepwater Horizon oil spill impacted Louisiana's coastal estuaries physically, chemically, and biologically. To better understand the ecological consequences of this oil spill on Louisiana estuaries, we compared the abundance and size of two Gulf shrimp species (Farfantepeneus aztecus and Litopeneus setiferus) in heavily affected and relatively unaffected estuaries, before and after the oil spill. Two datasets were used to conduct this study: data on shrimp abundance and size before the spill were available from Louisiana Department of Wildlife and Fisheries (LDWF). Data on shrimp abundance and size from after the spill were independently collected by the authors and by LDWF. Using a Before-After-Control-Impact with Paired sampling (BACIP) design with monthly samples of two selected basins, we found brown shrimp to become more abundant and the mean size of white shrimp to become smaller. Using a BACIP with data on successive shrimp year-classes of multiple basins, we found both species to become more abundant in basins that were affected by the spill, while mean shrimp size either not change after the spill, or increased in both affected and unaffected basins. We conclude that following the oil spill abundances of both species increased within affected estuaries, whereas mean size may have been unaffected. We propose two factors that may have caused these results: 1) exposure to polycyclic aromatic hydrocarbons (PAHs) may have reduced the growth rate of shrimp, resulting in a delayed movement of shrimp to offshore habitats, and an increase of within-estuary shrimp abundance, and 2) fishing closures established immediately after the spill, may have resulted in decreased fishing effort and an increase in shrimp abundance. This study accentuates the complexities in determining ecological effects of oil spills, and the need of studies on the organismal level to reveal cause-and-effect relationships of such events.
dc.description.sponsorship This work was funded by Louisiana Sea Grant (R/OS-04-PD). Publication of this article was funded in part by the George Mason University Libraries Open Access Publishing Fund. en_US
dc.language.iso en_US en_US
dc.publisher Public Library of Science en_US
dc.rights Attribution 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by/3.0/us/ *
dc.subject shrimp en_US
dc.subject oil spills en_US
dc.subject estuaries en_US
dc.subject fisheries en_US
dc.subject fish physiology en_US
dc.subject shores en_US
dc.subject marshes en_US
dc.subject wildlife en_US
dc.title Abundance and Size of Gulf Shrimp in Louisiana's Coastal Estuaries following the Deepwater Horizon Oil Spill en_US
dc.type Article en_US
dc.identifier.doi http://dx.doi.org/10.1371/journal.pone.0108884


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