Large Shifts in Commercial Landings of Estuarine and Bay Bivalve Mollusks in Northeastern United States after 1980 with Assessment of Causes

MacKenzie, Clyde L.; Tarnowski, Mitchell

doi:10.7755/mfr.80.1.1

Cited by 14 publications

(11 citation statements)

References 102 publications

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“…Commercially important shellfish have been in decline in the northeastern United States and some of this decline has been correlated to decadal shifts in climate (specifically the North Atlantic Oscillation) [15]. This work shows that physical parameters influenced by climate patterns (e.g., sea level, current, winds) can have a large impact on larval connectivity Understanding the larval stage provides insight into shellfish population connectivity that can help strategically identify areas for restoration.…”

Section: Discussionmentioning

confidence: 86%

“…Commercially important shellfish have declined sharply in U.S. estuaries and bays from Maine to North Carolina and some of these declines have been linked to shifts in the North Atlantic Oscillation [15]. The lack of continuous survey records of abundance and distribution of shellfish in Barnegat Bay Little Egg Harbor (BBLEH) makes inference about possible population trends over time difficult [16].…”

Section: Introductionmentioning

confidence: 99%

“…Hard clam surveys performed by the New Jersey Department of Environmental Protection (NJDEP) Bureau of Shellfisheries have shown that wild adult hard clam populations have been in decline [17]. Although data is limited the decline between the early 1980s and 2000s have been reported as 36% decline for oysters and 83% for clams in Barnegat Bay [15]. Recently, community groups interested in conservation and enhancement of the estuary (e.g., the Barnegat Bay Partnership) have identified shellfish stock enhancement as a key strategic priority because shellfish are key ecosystem components.…”

Section: Introductionmentioning

confidence: 99%

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Estimating Connectivity of Hard Clam (Mercenaria mercenaria) and Eastern Oyster (Crassostrea virginica) Larvae in Barnegat Bay

Goodwin

Munroe

Defne

et al. 2019

JMSE

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Many marine organisms have a well-known adult sessile stage. Unfortunately, our lack of knowledge regarding their larval transient stage hinders our understanding of their basic ecology and connectivity. Larvae can have swimming behavior that influences their transport within the marine environment. Understanding the larval stage provides insight into population connectivity that can help strategically identify areas for restoration. Current techniques for understanding the larval stage include modeling that combines particle attributes (e.g., larval behavior) with physical processes of water movement to contribute to our understanding of connectivity trends. This study builds on those methods by using a previously developed retention clock matrix (RCM) to illustrate time dependent connectivity of two species of shellfish between areas and over a range of larval durations. The RCM was previously used on physical parameters but we expand the concept by applying it to biology. A new metric, difference RCM (DRCM), is introduced to quantify changes in connectivity under different scenarios. Broad spatial trends were similar for all behavior types with a general south to north progression of particles. The DRCMs illustrate differences between neutral particles and those with behavior in northern regions where stratification was higher, indicating that larval behavior influenced transport. Based on these findings, particle behavior led to small differences (north to south movement) in transport patterns in areas with higher salinity gradients (the northern part of the system) compared to neutral particles. Overall, the dominant direction for particle movement was from south to north, which at times was enhanced by winds from the south. Clam and oyster restoration in the southern portion of Barnegat Bay could serve as a larval supply for populations in the north. These model results show that coupled hydrodynamic and particle tracking models have implications for fisheries management and restoration activities.

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Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Estimating Connectivity of Hard Clam (Mercenaria mercenaria) and Eastern Oyster (Crassostrea virginica) Larvae in Barnegat Bay

Goodwin

Munroe

Defne

et al. 2019

JMSE

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“…The effects of positive NAO phases and warmer-than-average sea surface temperatures on fish productivity off the coast of New England have been well documented for lobsters, shellfish, and groundfish, especially during the period of spawning through recruitment, when stocks are most vulnerable to physical environmental conditions (2, 6, 7, 25). This body of literature empirically measures how these environmental shocks can lower biomass, landings, or catch for these valuable fisheries.…”

mentioning

confidence: 99%

“…Here I exploit the fact that NAO’s effect on different fish stocks varies due to ecological differences. In New England, there is evidence that catch of the commercially valuable species is negatively correlated with sea-surface temperatures (SSTs) or NAO (2, 6, 7, 25). In the South Atlantic region, there is a mixture of warm-water and cold-water species.…”

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confidence: 99%

Climate variability reduces employment in New England fisheries

Oremus

2019

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

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Climate change is already affecting fish productivity and distributions worldwide, yet its impact on fishing labor has not been examined. Here I directly link large-scale climate variability with fishery employment by studying the effects of sea-surface pressure changes in the North Atlantic region, whose waters are among the world’s fastest warming. I find that climate shocks reduce not only regional catch and revenue in the New England fishing sector, but also ultimately county-level wages and employment among commercial harvesters. Each SD increase from the climatic mean decreases county-level fishing employment by 13%, on average. The South Atlantic region serves as a control due to its different ecological response to climate. Overall, I estimate that climate variability from 1996 to 2017 is responsible for a 16% (95% CI: 10% to 22%) decline in county-level fishing employment in New England, beyond the changes in employment attributable to management or other factors. This quantitative evidence linking climate variability and fishing labor has important implications for management in New England, which employs 20% of US commercial harvesters. Because the results are mediated by the local biology and institutions, they cannot be directly extrapolated to other regions. But they show that climate can impact fishing outcomes in ways unaccounted by management and offer a template for study of this relationship in fisheries around the world.

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The archaeology of 19^th century oyster consumption in Melbourne

Marshall

2024

Archaeology in Oceania

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This paper presents comparative research on marine shell from four 19th century historical archaeological sites in Melbourne. The shell derives predominantly from Mud Oyster (Ostrea angasi) and Sydney Rock Oyster (Saccostrea glomerata) commercially harvested from natural reefs along the south‐east Australian coastline. The research collects quantitative data that informs on the 19th century oyster industry and investigates inter‐site shell variability and its implications for processing, consumption and discard. Dredging of subtidal reefs provides an explanation for the numerical dominance of oyster, the presence of subfossil cultch (Anadara) and the wide range of minor shellfish. Mud oyster and Sydney rock oyster comparisons in valve size, sided counts and preservation record significant differences within and between sites due to the origins, depositional conditions and the processing of the shell. These data form the basis of two models. The first predicts the archaeological representation of reef dredging and ranks shellfish according to categories, from live oysters to dead shell sampled from the reef substrate. Based on oyster shell anatomy and the separate uses of the right (lid) and left (dish) valves, the second model considers how oyster processing and consumption is characterised archaeologically in differential valve counts and pairing rates.

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Large Shifts in Commercial Landings of Estuarine and Bay Bivalve Mollusks in Northeastern United States after 1980 with Assessment of Causes

Cited by 14 publications

References 102 publications

Estimating Connectivity of Hard Clam (Mercenaria mercenaria) and Eastern Oyster (Crassostrea virginica) Larvae in Barnegat Bay

Estimating Connectivity of Hard Clam (Mercenaria mercenaria) and Eastern Oyster (Crassostrea virginica) Larvae in Barnegat Bay

Climate variability reduces employment in New England fisheries

The archaeology of 19^th century oyster consumption in Melbourne

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Large Shifts in Commercial Landings of Estuarine and Bay Bivalve Mollusks in Northeastern United States after 1980 with Assessment of Causes

Cited by 14 publications

References 102 publications

Estimating Connectivity of Hard Clam (Mercenaria mercenaria) and Eastern Oyster (Crassostrea virginica) Larvae in Barnegat Bay

Estimating Connectivity of Hard Clam (Mercenaria mercenaria) and Eastern Oyster (Crassostrea virginica) Larvae in Barnegat Bay

Climate variability reduces employment in New England fisheries

The archaeology of 19th century oyster consumption in Melbourne

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Product

Resources

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The archaeology of 19^th century oyster consumption in Melbourne