scholarly journals Sediment Selection: Range Expanding Fiddler Crabs are Better Burrowers Than Their Historic Range Counterparts

2020 ◽  
Author(s):  
Richard J Wong ◽  
Michael S. Roy ◽  
Jarrett E. K. Byrnes
Keyword(s):  
New England ◽  
Fiddler Crab ◽  
Gulf Of Maine ◽  
Rapid Evolution ◽  
Cape Cod ◽  
Physical Habitat ◽  
Species Ranges ◽  
Sediment Compaction ◽  
Burrowing Activity ◽  
Historical Range

ABSTRACTSpecies ranges are shifting in response to climate change. In New England saltmarshes, the mud fiddler crab, Minuca pugnax, is expanding north of Cape Cod, MA into the Gulf of Maine (GoM) due to warming waters. The burrowing lifestyle of M. pugnax means sediment compaction in saltmarshes may influence the ability for crabs to dig, with more compact soils being resilient to burrowing. Previous studies indicate that saltmarshes along the GoM have higher soil strength (i.e., compaction) relative to marshes south of Cape Cod. Together, physical characteristics and temperature of this habitat may be influencing the burrowing performance of M. pugnax, and therefore the continuation of their northward range expansion into the GoM. To determine if compaction affects burrowing activity of M. pugnax in historical and range expanded populations, we conducted a controlled laboratory experiment. We manipulated soil compaction in standardized lab assays and measured crab burrowing performance with individuals collected from Nantucket (i.e., historical range) and the Plum Island Estuary (PIE, i.e., expanded range). We determined compaction negatively affected burrowing ability in crabs from both sites; however, crabs from PIE burrowed in higher soil compactions than Nantucket crabs. In addition, PIE crabs were more likely to burrow overall. We conclude that site level differences in compaction are likely altering burrowing behavior in the crab’s expanded range territory by way of phenotypic plasticity or rapid evolution. Our study demonstrates that non-temperature physical habitat traits can be as important as temperature in influencing climate driven range expansions.

scholarly journals Ring-shaped morphological features and interpreted small seamounts between southern Quebec (Canada) and the New England seamounts (USA) and their possible association with the New England hotspot track

2018 ◽  
pp. 223-265
Author(s):  
Ronald T. Marple ◽  
James D. Hurd, Jr. ◽  
Robert J. Altamura
Keyword(s):  
New England ◽  
Continental Slope ◽  
Gulf Of Maine ◽  
Morphological Features ◽  
Cape Cod ◽  
Digital Elevation ◽  
Igneous Province ◽  
Seamount Chain ◽  
Elevation Model ◽  
Digital Elevation Model Data

 Enhancements of recently available high-resolution multibeam echosounder data from the western Gulf of Maine and Atlantic continental margin and light detection and ranging (LiDAR) and digital elevation model data from southeastern Quebec (Canada) and the northeastern United States have revealed numerous ring-shaped morphological features and interpreted small seamounts between the Monteregian Hills igneous province and the New England seamounts. The morphological features onshore are mainly ring-shaped depressions, several of which surround mapped igneous intrusions in the Monteregian Hills igneous province and White Mountain magma series. Most of the rings offshore are also depressions, although a few rings are curved ridges above the seafloor. The largest ring in the western Gulf of Maine is the 30-km-diameter Tillies ring that lies 20 km east of Cape Ann, MA. Several small (<3 km in diameter) round, flat-topped submerged hills that we interpret to be volcanic necks are also present beneath the western Gulf of Maine. The rings between Cape Cod and the continental slope are more subtle because of thicker sediments and poorer spatial resolution of the sonar data in this area. The southernmost ring-shaped features are located on the continental slope and upper continental rise and coincide with the northwestern end of the New England seamount chain. The concentration of these features between the Monteregian Hills igneous province and the New England seamounts suggests that they are igneous features that may be associated with the New England hotspot track. 

Humpback Whales (Megaptera novaeangliae) Fatally Poisoned by Dinoflagellate Toxin

1989 ◽  
Vol 46 (11) ◽  
pp. 1895-1898 ◽  
Author(s):  
Joseph R. Geraci ◽  
Donald M. Anderson ◽  
Ralph J. Timperi ◽  
David J. St. Aubin ◽  
Gregory A. Early ◽  
...  
Keyword(s):  
New England ◽  
Marine Mammals ◽  
Gulf Of Maine ◽  
Paralytic Shellfish Poisoning ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Cape Cod ◽  
Shellfish Poisoning ◽  
Atlantic Mackerel ◽  
Cape Cod Bay

During a 5–wk period beginning in late November, 1987, 14 humpback whales, Megaptera novaeangliae, died in Cape Cod Bay after eating Atlantic mackerel, Scomber scombrus, containing saxitoxin (STX), a dinoflagellate neurotoxin responsible for paralytic shellfish poisoning in humans. We propose a line of evidence to explain how whales, by virtue of their diving adaptations, may be particularly vulnerable to this systemic neurotoxin. Absence of STX in New England waters and shellfish during the episode suggests that the mackerel, representing the northern stock which spawns in the Gulf of St. Lawrence, accumulated the toxin there and delivered it to the Gulf of Maine and Cape Cod Bay in the fall of 1987. These findings challenge common perceptions of the manner in which planktonic toxins move through the food chain, and offer new insights into natural mortality and standings of marine mammals. It seems appropriate to search for STX and other phytotoxins when investigating marine mammal mortalities.

The density of the Atlantic marsh fiddler crab (Minuca pugnax, Smith, 1870) (Decapoda: Brachyura: Ocypodidae) in its expanded range in the Gulf of Maine, USA

2020 ◽  
Vol 40 (5) ◽  
pp. 544-548 ◽  
Author(s):  
Kayla S Martínez-Soto ◽  
David S Johnson
Keyword(s):  
Fiddler Crab ◽  
Gulf Of Maine ◽  
Ecosystem Engineer ◽  
Fold Increase ◽  
Camera Traps ◽  
Crab Population ◽  
Crab Density ◽  
The Relationship ◽  
Historical Range ◽  
Count Surveys

Abstract The Atlantic marsh fiddler crab, Minuca pugnax (Smith, 1870), is a climate migrant that recently expanded its range northward into the Gulf of Maine. We tracked the M. pugnax population within the Great Marsh, in northeastern Massachusetts, USA, since it was first detected in 2014 using burrow counts. Because burrow counts can overestimate fiddler-crab density, we used camera traps to determine the relationship between burrow densities and fiddler-crab densities in 2019. The burrow count surveys show a six-fold increase in the density of M. pugnax in the Great Marsh from 2014 to 2019. Results indicates that the fiddler-crab population in the expanded range is established and growing. Based on burrow counts, however, the density of M. pugnax in the expanded range (6 burrows m–2) remains much lower than those found in the historical range (up to 300 burrows m–2). Based on the camera traps, we determined that burrow counts overestimated fiddler-crab densities by 47% in 2019. There was, on average, one crab detected for every two burrows observed. This result suggests that estimates of densities of M. pugnax based on burrow counts should be reduced by half. Minuca pugnax is an ecosystem engineer that can influence saltmarsh functioning and the magnitude of that influence is related to its density. Our results imply that the populations of M. pugnax in the expanded range are currently having minor impacts on marshes relative to larger populations in the historical range, but their impact will increase as the populations grow.

A climate migrant escapes its parasites

2020 ◽  
Vol 641 ◽  
pp. 111-121 ◽  
Author(s):  
DS Johnson ◽  
JD Shields ◽  
D Doucette ◽  
R Heard
Keyword(s):  
Salt Marshes ◽  
Fiddler Crab ◽  
Gulf Of Maine ◽  
Infection Prevalence ◽  
Parasite Richness ◽  
The Us ◽  
Gill Lamellae ◽  
Enemy Escape ◽  
First Time ◽  
Historical Range

When a species colonizes a new range, it can escape enemies found in its original range. Examples of enemy escape abound for invasive species, but are rare for climate migrants, which are populations of a species that colonize a new range due to climate-driven range shifts or expansions. The fiddler crab Minuca (=Uca) pugnax is found in the intertidal salt marshes of the US east coast. It recently expanded its range north into the Gulf of Maine as a result of ocean warming. We tested the hypothesis that M. pugnax had escaped its parasite enemies. Parasite richness and trematode intensity were lower in populations in the expanded range than in populations in the historical range, but infection prevalence did not differ. Although M. pugnax escaped most of its historical parasites when it migrated northward, it was infected with black-gill lamellae (indicative of Synophrya hypertrophica), which was found in the historical range, and with the trematode Odhneria cf. odhneri, which was not found in the historical range. To our knowledge, this is the first time that O. cf. odhneri has been reported in fiddler crabs. These results demonstrate that although M. pugnax escaped some of its historical parasites when it expanded its range, it appears to have gained a new parasite (O. cf. odhneri) in the expanded range. Overall, our results demonstrate that climate migrants can escape their enemies despite colonizing habitats adjacent to their enemy-filled historical range.

Advancing an Ecosystem Approach in the Gulf of Maine

2012 ◽  
Keyword(s):  
New England ◽  
Gulf Of Maine ◽  
Environmental Gradients ◽  
Polarized Light ◽  
Ecosystem Approach ◽  
Water Bloom ◽  
Sun Compass ◽  
Fine Sediments ◽  
Wide Range ◽  
Crangon Septemspinosa

<i>Abstract</i> .—Because of partial recirculation and steep bottom slopes, the Gulf of Maine (GoM) contains steep environmental gradients in both space and time. I focus, in particular, on optical properties associated with both resources and risks. The GoM estuary-shelf systems differ from those whose fine sediments are trapped behind barrier bars; in the GoM, nepheloid layers prevail over a wide range of depths, and onshore-offshore turbidity gradients at a given water depth are also steep. Turbidity reduces predation risk. Three crustacean species that are major fish forages respond to the strong environmental gradients in resources and risks by migrating seasonally both horizontally and vertically. Northern shrimp (also known as pink shrimp) <i>Pandalus borealis</i> , sevenspine bay shrimp <i>Crangon septemspinosa</i> , and the most common mysid shrimp in the GoM, <i>Neomysis americana</i> , share both stalked eyes that appear capable of detecting polarized light and statocysts. This pair of features likely confers sun-compass navigational ability, facilitating use of multiple habitats. All three species converge on a shallow-water bloom at depths <100 m of the western GoM shelf in December–March, well before the basin-wide, climatological spring bloom in April. In addition to reaching abundant food resources, I propose that they are also using optical protection, quantified as the integral of the beam attenuation coefficient from the surface to the depth that they occupy during daylight. Spring immigration into, and fall emigration from, estuaries appear to be common in GoM sevenspine bay shrimp and <i>N. americana</i> , out of phase with their populations south of New England and with turbidity differences a likely cause. Migration studies that include measurements of turbidity are needed, however, to test the strength of the effect of optical protection on habitat use by all three species. Simultaneous sampling of estuaries and the adjacent shelf, together with trace-element tracer studies, would be very useful to resolve timing and extent of mass migrations, which likely are sensitive to turbidity change resulting from climate change. These migrations present special challenges to ecosystem-based management by using so many different habitats.

Joining the club: a Tongan ‘akau in New England

Curatopia ◽  
2019 ◽  
pp. 176-190
Author(s):  
Ivan Gaskell
Keyword(s):  
Nineteenth Century ◽  
New England ◽  
Cape Cod ◽  
Historical Society

This chapter examines the place of Oceanic clubs in New England collections. During the nineteenth century, they occupied an equivocal position in the New England mental repertory as indices of savage sophistication, and as souvenirs of colonial childhood or travel. Focusing on a Tongan ‘akau tau in the collection of the Chatham Historical Society on Cape Cod, Massachusetts, this chapter traces what can be known of its history as a highly regarded prestige gift item among New Englanders from the middle of the nineteenth century until its entry into the museum. As a thing that an early owner could alienate legitimately, its presence in Chatham is not unethical, yet it nonetheless imposes stewardship responsibilities—consultation with the originating community—that such a small institution is poorly placed to meet. This requires understanding and patience rather than disapprobation.

scholarly journals Lady Crabs, Ovalipes ocellatus, in the Gulf of Maine

2006 ◽  
Vol 120 (1) ◽  
pp. 106
Author(s):  
J. C. A. Burchsted ◽  
Fred Burchsted
Keyword(s):  
Gulf Of Maine ◽  
Cape Cod ◽  
Massachusetts Bay ◽  
North Shore ◽  
The North ◽  
Cape Cod Bay ◽  
Continuous Range ◽  
Local Habitat

The Lady Crab (Ovalipes ocellatus), mainly found south of Cape Cod and in the southern Gulf of St. Lawrence, is reported from an ocean beach on the north shore of Massachusetts Bay (42°28'60"N, 70°46'20"W) in the Gulf of Maine. All previously known Gulf of Maine populations north of Cape Cod Bay are estuarine and thought to be relicts of a continuous range during the Hypsithermal. The population reported here is likely a recent local habitat expansion.

scholarly journals Chronic social disruption following a systemic fishery failure

2019 ◽  
Vol 116 (46) ◽  
pp. 22912-22914 ◽  
Author(s):  
Steven B. Scyphers ◽  
J. Steven Picou ◽  
Jonathan H. Grabowski
Keyword(s):  
Psychological Distress ◽  
New England ◽  
Gulf Of Maine ◽  
Classification Tree ◽  
Well Being ◽  
The United States ◽  
Social Disruption ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Groundfish Fishery

In the United States, the iconic groundfish fishery for Gulf of Maine cod has endured several dramatic reductions in annual catch limits and been federally declared an economic disaster. Using a repeated cross-sectional survey of fishing captains to assess potential social impacts of the fishery failure, we found that psychological distress and social disruption were pervasive throughout New England fishing communities. For instance, our results indicate that 62% of captains self-reported severe or moderate psychological distress 1 y after the crisis began, and these patterns have persisted for 5 y. Using classification tree analyses, we found that low levels of trust in fisheries management was the most powerful predictor of both initial and chronic psychological distress. Distress was most severe among individuals without income diversity and those with dependents in the household. Compared to other aspects of fisheries, measuring and managing for noneconomic social outcomes and human well-being has lagged behind, even though it is a necessary component of mitigating the adverse impacts of fisheries disruptions.

Sign in / Sign up

Export Citation Format

Share Document