Shellfish of the Gulf of Mexico

Tunnell, John W.

doi:10.1007/978-1-4939-3447-8_8

Cited by 10 publications

(11 citation statements)

References 48 publications

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“…Furthermore, subsistence fisheries off northwest CUB are intensive (Claro et al. ; Tunnell ; S. A. Murawski and M. Armenteros, personal observations). Baisre () concluded that 79% of Cuban marine fishery stocks were overfished or collapsed.…”

Section: Discussionmentioning

confidence: 99%

“…Due to the importance of these target species in all GoM subareas, there is concern that the cumulative impacts of an array of stressors may trigger communitywide regime shifts in abundance and species dominance. The three countries bordering the GoM all have differing fishery management regimes, resulting in varying degrees of success in achieving sustainable fisheries (Tunnell ). Harmonizing management goals and strategies among countries for interconnected species and communities now occurs only for those stocks that are managed under regional fishery management organizations (e.g., the International Commission for the Conservation of Atlantic Tunas).…”

Section: Discussionmentioning

confidence: 99%

“…These perturbations include fishing (commercial, recreational, and subsistence), climate change and variability, habitat loss, pollution (both chronic [e.g., nutrient inputs] and acute [e.g., oil spills]), invasive species, disruptive natural phenomena such as hurricanes, and other factors. Fishery and environmental management regimes, which may vary widely among nations sharing contiguous LME waters (Tunnell ), will also influence the abundance and demographics of species both within territorial jurisdictions and across national boundaries, especially for species with high dispersal potential. Effects of intensive perturbations can be manifested in reduced abundance of species and whole assemblages, truncated size distributions, and higher variability in recruitment, all of which undermine ecosystem resilience.…”

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confidence: 99%

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Comparative Abundance, Species Composition, and Demographics of Continental Shelf Fish Assemblages throughout the Gulf of Mexico

et al. 2018

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We analyzed the results of the first comprehensive, systematic, fishery-independent survey of Gulf of Mexico (GoM) continental shelves using data collected from demersal longline sampling off the United States, Mexico, and Cuba. In total, 166 species were sampled from 343 longline sets during 2011-2017, which deployed 153,146 baited hooks, catching 14,938 fish. Abundance, species richness, and Shannon-Wiener diversity indices by station were highest in mid-shelf depths (~100 m), declining by about half in deeper waters. Six spatial assemblages were identified by testing the results of cluster analysis using similarity profile analysis and then plotting the geographic location of identified station clusters. A high degree of depth-related and horizontal zonation was evident for demersal fish species. Multispecies CPUE (number per 1,000 hookhours) was highest off the north-central (NC) and northwestern (NW) GoM and lower on the West Florida Shelf (WFS), Cuba (CUB), Yucatan Peninsula (YP), and southwestern (SW) GoM. Snappers and groupers were most abundant in the WFS and CUB, while elasmobranchs were the dominant taxa in the NC and NW GoM. Pelagic species were relatively rare everywhere (owing to the use of demersal longline gear), but were most dense off CUB. Species richness was highest in the NC and WFS subareas and lowest in the NW and CUB. Slopes of multispecies size spectra, which integrated mortality, recruitment, growth, and species interactions among size-groups, were shallowest in the NW and NC GoM and steepest off the WFS and YP. These results provide a basis for evaluating the relative resiliency potential of species assemblages across the continental shelves of the GoM, and thus for identifying subareas that are most vulnerable to acute and chronic perturbations from cumulative effects of fishing, climate change, pollution (including oil spills), habitat loss, and invasive species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Comparative Abundance, Species Composition, and Demographics of Continental Shelf Fish Assemblages throughout the Gulf of Mexico

et al. 2018

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“…Second, although some studies have suggested that oil contamination may decrease growth in oysters [25,26,56,57], others have found little or no effect of hydrocarbons on growth [58], suggesting that impacts to Gulf Coast oysters from the DWH oil spill may have been limited. In particular, extensive experimental and field studies designed to assess the impact of the oil and gas industry on Gulf Coast oysters, conducted between the late 1940s and early 1960s—known colloquially as Projects 9 and 23—repeatedly found that the effects of light to moderate oil contamination and bleedwater disposal on oyster recruitment, growth and mortality were negligible [59,60]. …”

Section: Discussionmentioning

confidence: 99%

“…(ii) If effects elsewhere in the food web decreased abundances of various predators of oysters and/or oyster larvae, then oyster populations may have largely kept up with the negative effects of oiling. For instance, barnacles can be important predators of oyster larvae and are thought to be vulnerable to hydrocarbon pollution [60], although there is also evidence to the contrary [52,68]. (iii) Populations are often capable of responding to declining abundance with compensatory production, due, for instance, to greater survival of larvae or juveniles, that can largely make up for high mortality, and there is evidence that this may be the case for oysters in Louisiana [38].…”

Section: Discussionmentioning

confidence: 99%

Geohistorical records indicate no impact of the Deepwater Horizon oil spill on oyster body size

Dietl

Durham

2016

R. Soc. open sci.

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Documentation of the near- and long-term effects of the Deepwater Horizon (DWH) oil spill, one of the largest environmental disasters in US history, is still ongoing. We used a novel before-after-control-impact analysis to test the hypothesis that average body size of intertidal populations of the eastern oyster (Crassostrea virginica) inhabiting impacted areas in Louisiana decreased due to increased stress/mortality related to the oil spill. Time-averaged death assemblages of oysters were used to establish a pre-spill baseline of body-size structure for four impacted and four control locations along a 350 km stretch of Louisiana's coastline. Post-spill body sizes were then measured from live oysters at each site in order to evaluate the differences in body size between oiled (i.e. impact) and unoiled (i.e. control) locations before and after the spill. Our results indicate that average body size of oysters remained relatively unchanged after the oil spill. There were also no temporal patterns in temperature, salinity or disease prevalence that could have explained our results. Together, these findings suggest that oysters either recovered rapidly following the immediate impact of the DWH oil spill, or that its impact was not severe enough to influence short-term population dynamics of the oyster beds.

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Microplastic occurrence and effects in commercially harvested North American finfish and shellfish: Current knowledge and future directions

Baechler

Stienbarger

Horn

et al. 2019

Limnol Oceanogr Letters

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As global seafood consumption rises, it is important to understand the mechanisms by which fisheries are affected by microplastic pollution. A growing body of literature describes the occurrence and effects of microplastics in commercial species, primarily from Europe, Asia, and South America; however, there are far fewer studies conducted in North America. In this article, we review the evidence available for the presence and effects of microplastics on commercially valuable fishery species of North America and possible consequences of human consumption. We identify key priorities for future research on this topic including geographic and taxonomic representativeness; physiological, organismal, and population level effects; microplastics as multiple stressors; human health risks; and standardization of field and lab protocols. AbstractCommercial fisheries yield essential foods, sustain cultural practices, and provide widespread employment around the globe. Commercially harvested species face a myriad of anthropogenic threats including degraded habitats, changing climate, overharvest, and pollution. Microplastics are pollutants of increasing concern, which are pervasive in the environment and can harbor or adsorb pollutants from surrounding waters. Aquatic organisms, including commercial species, encounter and ingest microplastics, but there is a paucity of data about those caught and cultured in North America. Additional research is needed to determine prevalence, physiological effects, and population-level implications of microplastics in commercial species from Canada,

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Shellfish of the Gulf of Mexico

Cited by 10 publications

References 48 publications

Comparative Abundance, Species Composition, and Demographics of Continental Shelf Fish Assemblages throughout the Gulf of Mexico

Comparative Abundance, Species Composition, and Demographics of Continental Shelf Fish Assemblages throughout the Gulf of Mexico

Geohistorical records indicate no impact of the Deepwater Horizon oil spill on oyster body size

Microplastic occurrence and effects in commercially harvested North American finfish and shellfish: Current knowledge and future directions

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