scholarly journals Revisiting the marine migration of US Atlantic salmon using historical Carlin tag data

2012 ◽  
Vol 69 (9) ◽  
pp. 1609-1615 ◽  
Author(s):  
Alicia S. Miller ◽  
Timothy F. Sheehan ◽  
Mark D. Renkawitz ◽  
Alfred L. Meister ◽  
Timothy J. Miller
Keyword(s):  
Atlantic Salmon ◽  
New England ◽  
Additive Model ◽  
Atlantic Multidecadal Oscillation ◽  
The United States ◽  
West Greenland ◽  
The North ◽  
Marine Migration ◽  
Penobscot River ◽  
The North Atlantic Oscillation

Abstract Miller, A. S., Sheehan, T. F., Renkawitz, M. D., Meister, A. L., and Miller, T. J. 2012. Revisiting the marine migration of US Atlantic salmon using historical Carlin tag data. – ICES Journal of Marine Science, 69: 1609–1615. The development of a fishery for Atlantic salmon (Salmo salar) in the sea at West Greenland in the early 1960s prompted the start of a US tagging programme in 1962. Between 1962 and 1996, more than 1.5 million salmon from New England rivers, primarily hatchery-reared smolts, were tagged and released. Overall, the rate of tag recovery was 0.55%, with 23.2% of the tags recovered from Canada, 26.0% from Greenland, and 50.8% from the United States. A generalized additive model was used to analyse marine survival based on returns of tagged salmon to the Penobscot River. The month and year of release, sea age, smolt age, and environmental variables, such as the North Atlantic Oscillation (NAO) and Atlantic Multidecadal Oscillation (AMO) indices and local sea surface temperatures (SSTs), were assessed to explain the variability in the return rate. The AMO and NAO indices, SST, sea age, and time across years all affected survival assessed in terms of returns to the Penobscot River. The results provide information to support the management of Atlantic salmon stocks on a spatial and temporal scale in US rivers and the fishery at West Greenland.

scholarly journals The recruitment of Atlantic salmon in Europe

2009 ◽  
Vol 66 (2) ◽  
pp. 289-304 ◽  
Author(s):  
Kevin D. Friedland ◽  
Julian C. MacLean ◽  
Lars P. Hansen ◽  
Arnaud J. Peyronnet ◽  
Lars Karlsson ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
North Atlantic ◽  
Atlantic Multidecadal Oscillation ◽  
Climate Forcing ◽  
Biological Interactions ◽  
Physical Forcing ◽  
The North ◽  
Decadal Scale ◽  
The North Atlantic Oscillation ◽  
Growth Analyses

Abstract Friedland, K. D., MacLean, J. C., Hansen, L. P., Peyronnet, A. J., Karlsson, L., Reddin, D. G., Ó Maoiléidigh, N., and McCarthy, J. L. 2009. The recruitment of Atlantic salmon in Europe. – ICES Journal of Marine Science, 66: 289–304. The stock complex of Atlantic salmon, Salmo salar, in Europe has experienced a multidecadal decline in recruitment, resulting in the lowest stock abundances observed since 1970. Here, physical forcing, biological interactions, and the resultant growth response of post-smolt salmon are examined with a view to understanding the mechanism controlling recruitment. Sea surface temperature (SST) has increased in the Northeast Atlantic, with the pattern and seasonal change in SST negatively correlated with post-smolt survival during summer and in a region that spatially matches the post-smolt nursery. Constituents of the pelagic foodweb, including potential post-smolt food and plankton that may affect post-smolt forage, have changed on a decadal scale and correlate with salmon survival. Retrospective growth analyses of eight stock/sea age components show that post-smolt growth during summer is positively correlated with salmon survival and recruitment. The Atlantic Multidecadal Oscillation appears to be a more closely aligned climate forcing index than the North Atlantic Oscillation with respect to salmon recruitment. European Atlantic salmon recruitment appears to be governed by factors that affect the growth of post-smolts during their first summer at sea, including SST and forage abundances; growth appears to mediate survival by the functional relationship between post-smolts and their predators.

scholarly journals A 900-year New England temperature reconstruction from <i>in situ</i> seasonally produced branched glycerol dialkyl glycerol tetraethers (brGDGTs)

2018 ◽  
Author(s):  
Daniel R. Miller ◽  
M. Helen Habicht ◽  
Benjamin A. Keisling ◽  
Isla S. Castañeda ◽  
Raymond S. Bradley
Keyword(s):  
New England ◽  
Water Column ◽  
Lacustrine Sediments ◽  
Temperature Reconstruction ◽  
Early Spring ◽  
Pollen Record ◽  
The North ◽  
The North Atlantic Oscillation ◽  
Glycerol Dialkyl Glycerol Tetraethers

Abstract. Paleotemperature reconstructions are essential for distinguishing anthropogenic climate change from natural variability. An emerging method in paleoclimatology is the use of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in lacustrine sediments to reconstruct temperature, but their application is hindered by a limited understanding of their sources, seasonal production, and transport. We report seasonally resolved measurements of brGDGT production within the water column, in catchment soils and in a sediment sequence from a small, deep inland lake in Maine, USA. BrGDGT distributions in the water column are distinct from catchment soils but similar to the distributions in lake sediments, suggesting that (1) brGDGTs are produced within the lake and (2) this in situ production dominates the downcore sedimentary signal. Seasonally, depth-resolved measurements indicate that the dominant production of brGDGTs occurs in late fall/early spring and at intermediate depths (18–30 meters) in the water column. We apply these observations to help interpret a 900-year-long brGDGT-based temperature reconstruction and find that it shows similar trends to a pollen record from the same site and to regional and global syntheses of terrestrial temperatures over the last millennium. However, the record also shows higher-frequency variability than has previously been captured by such an archive in the Northeastern United States, potentially attributed to the North Atlantic Oscillation and volcanic/solar activity. This is the first brGDGT- based multi-centennial paleoreconstruction from this region and contributes to our understanding of the production and fate of brGDGTs in lacustrine systems.

scholarly journals Jesuits in the North American Colonies and the United States

2020 ◽  
Vol 2 (2) ◽  
pp. 1-112
Author(s):  
Catherine O’Donnell
Keyword(s):  
New England ◽  
Catholic Church ◽  
The United States ◽  
Early Years ◽  
American Colonies ◽  
The North ◽  
The Republic ◽  
Colonial New England ◽  
American Society ◽  
British Colonies

Abstract From Eusebio Kino to Daniel Berrigan, and from colonial New England to contemporary Seattle, Jesuits have built and disrupted institutions in ways that have fundamentally shaped the Catholic Church and American society. As Catherine O’Donnell demonstrates, Jesuits in French, Spanish, and British colonies were both evangelists and agents of empire. John Carroll envisioned an American church integrated with Protestant neighbors during the early years of the republic; nineteenth-century Jesuits, many of them immigrants, rejected Carroll’s ethos and created a distinct Catholic infrastructure of schools, colleges, and allegiances. The twentieth century involved Jesuits first in American war efforts and papal critiques of modernity, and then (in accord with the leadership of John Courtney Murray and Pedro Arrupe) in a rethinking of their relationship to modernity, to other faiths, and to earthly injustice. O’Donnell’s narrative concludes with a brief discussion of Jesuits’ declining numbers, as well as their response to their slaveholding past and involvement in clerical sexual abuse.

How the Presidents Ate Their Salmon

2013 ◽  
Vol 13 (4) ◽  
pp. 1-9
Author(s):  
Catherine Schmitt
Keyword(s):  
Atlantic Salmon ◽  
The United States ◽  
Industrial Water ◽  
Cultural Traditions ◽  
Local Populations ◽  
National Memory ◽  
The Social ◽  
Industrial Water Use ◽  
Penobscot River ◽  
Food Fish

Between 1912 and 1992, recreational anglers on the Penobscot River in Maine carried on the annual tradition of giving the first Atlantic salmon caught each spring to the President of the United States. Local anglers maintained cultural traditions of catching and eating salmon, keeping them in the social memory of the region. Each president’s receipt and consumption of the first fish retained a national memory of Atlantic salmon as food, a memory that otherwise may have faded due to the decline of Atlantic salmon populations. At the same time, the annual gift of the Presidential Salmon revealed how local populations of food fish were affected by national policies regarding energy, industrial water use, and pollution. Today, the Presidential Salmon has implications for current restoration efforts on the Penobscot and other rivers across the globe.

scholarly journals Impacts of the North Atlantic Oscillation on Winter Precipitations and Storm Track Variability in Southeast Canada and Northeast US

2020 ◽  
Author(s):  
Julien Chartrand ◽  
Francesco Salvatore Rocco Pausata
Keyword(s):  
United States ◽  
North America ◽  
North Atlantic Oscillation ◽  
North Atlantic ◽  
Storm Track ◽  
The United States ◽  
Eastern North America ◽  
The North ◽  
The North Atlantic ◽  
The North Atlantic Oscillation

Abstract. The North Atlantic Oscillation (NAO) affects atmospheric variability from eastern North America to Europe. Although the link between the NAO and winter precipitations in the eastern North America have been the focus of previous work, only few studies have hitherto provided clear physical explanations on these relationships. In this study we revisit and extend the analysis of the effect of the NAO on winter precipitations over a large domain covering southeast Canada and the northeastern United States. Furthermore, here we use the recent ERA5 reanalysis dataset (1979–2018), which currently has the highest available horizontal resolution for a global reanalysis (0.25°), to track extratropical cyclones to delve into the physical processes behind the relationship between NAO and precipitation, snowfall, snowfall-to-precipitation ratio (S/P), and snow cover depth anomalies in the region. In particular, our results show that positive NAO phases are associated with less snowfall over a wide region covering Nova Scotia, New England and the Mid-Atlantic of the United States relative to negative NAO phases. Henceforth, a significant negative correlation is also seen between S/P and the NAO over this region. This is due to a decrease (increase) in cyclogenesis of coastal storms near the United States east coast during positive (negative) NAO phases, as well as a northward (southward) displacement of the mean storm track over North America.

scholarly journals Modelling annual mass balances of eight Scandinavian glaciers using statistical models

2015 ◽  
Vol 9 (1) ◽  
pp. 383-415 ◽  
Author(s):  
M. Trachsel ◽  
A. Nesje
Keyword(s):  
North Atlantic ◽  
Statistical Models ◽  
Atlantic Multidecadal Oscillation ◽  
Relative Importance ◽  
Mass Balances ◽  
Average Mass ◽  
The North ◽  
Nao Index ◽  
Time Period ◽  
The North Atlantic Oscillation

Abstract. Glacier mass balances are mainly influenced by accumulation-season precipitation and ablation-season temperature. We use a suite of statistical models to determine the influence of accumulation-season precipitation and ablation-season temperature on annual mass balances of eight Scandinavian glaciers, ranging from near coastal, maritime glaciers to inland, continental glaciers. Accumulation-season precipitation is more important for maritime glaciers, whereas ablation-season temperature is more important for annual balances of continental glaciers. However, the importances are not stable in time. For instance, accumulation-season precipitation is more important than ablation-season temperature for all glaciers in the 30 year period 1968–1997. In this time period the Atlantic Multidecadal Oscillation (AMO) index was consistently negative and the North Atlantic Oscillation (NAO) Index was consistently positive between 1987 and 1995, both being favourable for glacier growth. Hence, the relative importance of precipitation and temperature for mass balances is possibly influenced by the AMO and the NAO. Climate sensitivities estimated by statistical models are similar to climate sensitivities based on degree-day models, but are lower than climate sensitivities of energy balance models. Hence, future projections of mass balances found with our models seem rather optimistic. Still, all average mass balances found for the years 2050 and 2100 are negative.

A model for estimating mortality of Atlantic salmon, Salmo salar, between spawning events

2011 ◽  
Vol 68 (9) ◽  
pp. 1635-1650 ◽  
Author(s):  
P. Bradford Hubley ◽  
A. Jamie F. Gibson
Keyword(s):  
Time Series ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Mortality Rates ◽  
Estimation Model ◽  
Mortality Estimation ◽  
Atlantic Salmon Salmo Salar ◽  
The North ◽  
Second Year ◽  
The North Atlantic Oscillation

We developed a Bayesian hierarchical model to estimate annual mortality of repeat-spawning Atlantic salmon, Salmo salar, that distinguishes between mortality rates and the confounding effects of consecutive-year and alternate-year repeat-spawning strategies. The model provides annual estimates of two mortality rates: mortality in the first year (Z1), a time period during which salmon are primarily in freshwater (staging, spawning, and overwintering) followed by a brief period at sea, and mortality in the second year (Z2) when salmon are predominantly at sea. When fit to data for the LaHave River (Nova Scotia, Canada) salmon population, Z1 showed an increasing trend throughout the time series, whereas Z2 also increased but in a single, stepwise manner. Once a time series of mortality rates was separated from the other life-history parameters, we were able to demonstrate how they could be used for examining the influence of environmental conditions by comparing the estimated mortality rate time series with the North Atlantic Oscillation Index (NAOI). This comparison uncovered a statistically significant correlation between the NAOI and the survival in the second year after spawning that would not have been evident had the mortality estimation model not been developed.

Climate-driven biophysical changes in feeding and breeding environments explain the decline of southernmost European Atlantic salmon populations

2019 ◽  
Vol 76 (9) ◽  
pp. 1581-1595 ◽  
Author(s):  
Ana Almodóvar ◽  
Daniel Ayllón ◽  
Graciela G. Nicola ◽  
Bror Jonsson ◽  
Benigno Elvira
Keyword(s):  
Atlantic Salmon ◽  
Regime Shift ◽  
Temporal Trends ◽  
Atlantic Multidecadal Oscillation ◽  
Warming Trend ◽  
Trophic Conditions ◽  
Proximate Cause ◽  
The North ◽  
Spanish Atlantic ◽  
Biophysical Changes

The consistency of the global declining trend of Atlantic salmon (Salmo salar) populations suggests that climate-driven reduced survival and growth at sea are the main driving factors. The southernmost populations have experienced the greatest declines, consistent with harsher conditions in natal fresh waters. We analyzed temporal trends in Spanish Atlantic salmon, important food organisms at sea, and climatic variables in the breeding (fresh water) and feeding (marine) salmon areas from 1950 onwards to elucidate drivers of declining patterns. Salmon abundance dropped abruptly in 1970–1971, plausibly linked to widespread overfishing coincident with incipient changes in the marine food webs and freshwater hydrology. A major regime shift in biophysical conditions throughout the North Atlantic salmon feeding grounds occurred in 1986–1987, driven by the concurrence of an abrupt acceleration in the anthropogenic warming trend and the warm phase of the Atlantic Multidecadal Oscillation. This regime shift may be the proximate cause of the collapse of Spanish salmon observed in 1988–1989, which kept declining in parallel to trends of ever-increasing ocean and freshwater temperatures, decreasing river flows, and poorer marine trophic conditions.

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