Overlap between Atlantic bluefin tuna spawning grounds and observed Deepwater Horizon surface oil in the northern Gulf of Mexico

Muhling, Barbara A.; Roffer, Mitchell A.; Lamkin, John T.; Ingram, G. Walter; Upton, Melissa A.; Gawlikowski, G.; Muller‐Karger, Frank E.; Habtes, Sennai; Richards, William J.

doi:10.1016/j.marpolbul.2012.01.034

Cited by 53 publications

(37 citation statements)

References 20 publications

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“…Spawned eggs generally hatch in about one day, but larvae may persist in the water column for a month or more, depending on the species, increasing their probability of interacting with oil. Despite concerns about larval impacts on depleted western bluefin tuna stock spawning in the GoM, only an estimated 12%-14% of larval production (Muhling et al, 2012;Chancellor, 2015) occurred in the spill zone. Similarly, only about 5% of red snapper larval production was potentially exposed, although a larger proportion of the eastern GoM substock may have been affected.…”

Section: Summary and Discussionmentioning

confidence: 99%

How Did the Deepwater Horizon Oil Spill Affect Coastal and Continental Shelf Ecosystems of the Gulf of Mexico?

Murawski¹,

Fleeger²,

Patterson³

et al. 2016

Oceanog

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Section: Summary and Discussionmentioning

confidence: 99%

How Did the Deepwater Horizon Oil Spill Affect Coastal and Continental Shelf Ecosystems of the Gulf of Mexico?

Murawski¹,

Fleeger²,

Patterson³

et al. 2016

Oceanog

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“…Lowering the age at maturity will increase estimates of spawning stock biomass and will likely lead to higher estimates of sustainable fishing mortality rates (14,29,30). Second, analyses of the vulnerability of Atlantic bluefin tuna to climate change (31), the Deepwater Horizon oil spill (32), as well as the location of fishery closures to protect spawning fish, assume that the Gulf of Mexico and Mediterranean Sea are the only spawning grounds. These quantitative analyses and decisions need to be revisited.…”

Section: )mentioning

confidence: 99%

Discovery of a spawning ground reveals diverse migration strategies in Atlantic bluefin tuna (Thunnus thynnus)

Richardson

Marancik

Guyon

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

120

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Atlantic bluefin tuna are a symbol of both the conflict between preservationist and utilitarian views of top ocean predators, and the struggle to reach international consensus on the management of migratory species. Currently, Atlantic bluefin tuna are managed as an early-maturing eastern stock, which spawns in the Mediterranean Sea, and a late-maturing western stock, which spawns in the Gulf of Mexico. However, electronic tagging studies show that many bluefin tuna, assumed to be of a mature size, do not visit either spawning ground during the spawning season. Whether these fish are spawning in an alternate location, skip-spawning, or not spawning until an older age affects how vulnerable this species is to anthropogenic stressors including exploitation. We use larval collections to demonstrate a bluefin tuna spawning ground in the Slope Sea, between the Gulf Stream and northeast United States continental shelf. We contend that western Atlantic bluefin tuna have a differential spawning migration, with larger individuals spawning in the Gulf of Mexico, and smaller individuals spawning in the Slope Sea. The current life history model, which assumes only Gulf of Mexico spawning, overestimates age at maturity for the western stock. Furthermore, individual tuna occupy both the Slope Sea and Mediterranean Sea in separate years, contrary to the prevailing view that individuals exhibit complete spawning-site fidelity. Overall, this complexity of spawning migrations questions whether there is complete independence in the dynamics of eastern and western Atlantic bluefin tuna and leads to lower estimates of the vulnerability of this species to exploitation and other anthropogenic stressors.ichthyoplankton | Scombridae | large pelagic fish | pop-up satellite archival tag | population structure L ong-distance migrations pose a unique challenge to fisheries management, as conservation actions taken on a regional scale can be undermined if less stringent measures are implemented across other parts of the migratory pathway. Few species exemplify this problem better than Atlantic bluefin tuna (Thunnus thynnus). This species is harvested by the fisheries of over 20 nations, from the tropics to subarctic and coastal to international waters. Contentious international disputes have persisted for decades over how many bluefin tuna to harvest and how to allocate catch among nations. By the start of the 21st century, intense fishing pressure had driven this species to historically low population levels, a decline that has since reversed as fishing mortality has decreased under stricter management (1). However, despite this recent positive trend, many challenges remain in developing an ecologically sustainable fishery for bluefin tuna that also provides economic and social benefits to the fishing communities throughout its range. Among the most prominent of these challenges is the need for stock assessment models and management regulations that better account for the complex movements of this species.The movements of Atlantic bluefin t...

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“…The Deepwater Horizon (DWH) incident in 2010, the largest marine oil spill in U.S. history, resulted in exposure of many spawning pelagic fish species of economical and ecological importance, such as mahi-mahi ( Coryphaena hippurus ), bluefin ( Thunnus thynnus ) and yellowfin tuna ( Thunnus albacares )456. The DHW oil is a complex chemical mixture, with polycyclic aromatic hydrocarbons (PAHs) and their alkylated homologues being the main toxic components to fish embryos78.…”

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confidence: 99%

Novel transcriptome assembly and comparative toxicity pathway analysis in mahi-mahi (Coryphaena hippurus) embryos and larvae exposed to Deepwater Horizon oil

Mager

Grosell

et al. 2017

Sci Rep

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The impacts of Deepwater Horizon (DWH) oil on morphology and function during embryonic development have been documented for a number of fish species, including the economically and ecologically important pelagic species, mahi-mahi (Coryphaena hippurus). However, further investigations on molecular events and pathways responsible for developmental toxicity have been largely restricted due to the limited molecular data available for this species. We sought to establish the de novo transcriptomic database from the embryos and larvae of mahi-mahi exposed to water accommodated fractions (HEWAFs) of two DWH oil types (weathered and source oil), in an effort to advance our understanding of the molecular aspects involved during specific toxicity responses. By high throughput sequencing (HTS), we obtained the first de novo transcriptome of mahi-mahi, with 60,842 assembled transcripts and 30,518 BLAST hits. Among them, 2,345 genes were significantly regulated in 96hpf larvae after exposure to weathered oil. With comparative analysis to a reference-transcriptome-guided approach on gene ontology and tox-pathways, we confirmed the novel approach effective for exploring tox-pathways in non-model species, and also identified a list of co-expressed genes as potential biomarkers which will provide information for the construction of an Adverse Outcome Pathway which could be useful in Ecological Risk Assessments.

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Overlap between Atlantic bluefin tuna spawning grounds and observed Deepwater Horizon surface oil in the northern Gulf of Mexico

Cited by 53 publications

References 20 publications

How Did the Deepwater Horizon Oil Spill Affect Coastal and Continental Shelf Ecosystems of the Gulf of Mexico?

How Did the Deepwater Horizon Oil Spill Affect Coastal and Continental Shelf Ecosystems of the Gulf of Mexico?

Discovery of a spawning ground reveals diverse migration strategies in Atlantic bluefin tuna (Thunnus thynnus)

Novel transcriptome assembly and comparative toxicity pathway analysis in mahi-mahi (Coryphaena hippurus) embryos and larvae exposed to Deepwater Horizon oil

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