Demersal fish populations in the coastal waters of the UK and continental NW Europe from beam trawl survey data collected from 1990 to 1995

1998 ◽  
Vol 39 (1-2) ◽  
pp. 79-102 ◽  
Author(s):  
S.I. Rogers ◽  
A.D. Rijnsdorp ◽  
U. Damm ◽  
W. Vanhee
Keyword(s):  
Survey Data ◽  
Coastal Waters ◽  
Demersal Fish ◽  
Fish Populations ◽  
Trawl Survey ◽  
Beam Trawl ◽  
Beam Trawl Survey ◽  
The Uk ◽  
Nw Europe

Recurrent Group Analysis of Species Assemblages of Demersal Fish in the Gulf of Guinea

1968 ◽  
Vol 25 (7) ◽  
pp. 1405-1421 ◽  
Author(s):  
E. W. Fager ◽  
A. R. Longhurst
Keyword(s):  
Survey Data ◽  
Computer Analysis ◽  
Group Analysis ◽  
Demersal Fish ◽  
Species Assemblages ◽  
Trawl Survey ◽  
Wide Sense ◽  
Subjective Analysis ◽  
Major Species ◽  
Species Groups

Recurrent species groups were formed by computer analysis from the data on occurrence of demersal fish at 480 trawl stations in the tropical eastern Atlantic; these recurrent groups were then marshalled into a small number of major species assemblages, or communities in the wide sense, on the basis of intergroup relationships. These assemblages proved to be remarkably similar in composition and ecology to the communities of demersal fish recognized earlier by a number of authors from their subjective analysis of trawling survey data in this region. The computer analysis provided finer detail on both the structure and distribution of the assemblages and their constituent groups. This confirmation of the reality of the subjectively recognized communities suggests (1) that the recognition of such assemblages by subjective methods has a place in the assessment of multispecies fish resources but (2) that where the method is practicable, the machine processing of recurrent species groups in the analysis of trawl survey data can be a valuable tool in resource evaluation.

Seasonal Fluctuation in Abundance and Species Composition of Fish Collected by a Beam Trawl in Coastal Waters off Samcheonpo

2020 ◽  
Vol 32 (3) ◽  
pp. 160-165
Author(s):  
Tae-Sik Yu ◽  
Seong-Hoon Lee ◽  
Sa-Jo Kim ◽  
Jin-Goo Kwon ◽  
Kyeong Ho Han
Keyword(s):  
Species Composition ◽  
Coastal Waters ◽  
Seasonal Fluctuation ◽  
Beam Trawl

scholarly journals Predicted shifts of groundfish distribution in the Eastern Bering Sea under climate change, with implications for fish populations and fisheries management

2020 ◽  
Author(s):  
Christopher N Rooper ◽  
Ivonne Ortiz ◽  
Albert J Hermann ◽  
Ned Laman ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Bering Sea ◽  
Marine Species ◽  
Species Distribution Modelling ◽  
Fish Populations ◽  
Trawl Survey ◽  
Climate Scenarios ◽  
Important Species ◽  
Eastern Bering Sea ◽  
Northern Latitudes ◽  
Distribution Shifts

Abstract Climate-related distribution shifts for marine species are, in general, amplified in northern latitudes. The objective of this study was to predict future distributions of commercially important species in the eastern Bering Sea under six climate scenarios, by incorporating predictions of future oceanographic conditions. We used species distribution modelling to determine potential distribution changes in four time periods (2013–2017, 2030–2039, 2060–2069, and 2090-2099) relative to 1982–2012 for 16 marine fish and invertebrates. Most species were predicted to have significant shifts in the centre of gravity of the predicted abundance, the area occupied, and the proportion of the predicted abundance found in the standard bottom trawl survey area. On average the shifts were modest, averaging 35.2 km (ranging from 1 to 202 km). There were significant differences in the predicted trend for distribution metrics among climate scenarios, with the most extensive changes in distribution resulting from Representative Concentration Pathway 8.5 climate scenarios. The variability in distributional shifts among years and climate scenarios was high, although the magnitudes were low. This study provides a basis for understanding where fish populations might expand or contract in future years. This will provide managers’ information that can help guide appropriate actions under warming conditions.

scholarly journals Losing the Discursive Battle but Winning the Ideological War: Who Holds Thatcherite Values Now?

2021 ◽  
pp. 003232172098670
Author(s):  
Stephen Farrall ◽  
Emily Gray ◽  
Phil Mike Jones ◽  
Colin Hay
Keyword(s):  
Survey Data ◽  
Prime Minister ◽  
Public Attitudes ◽  
New Right ◽  
The Political ◽  
Political Leaders ◽  
Margaret Thatcher ◽  
The Uk

In what ways, if at all, do past ideologies shape the values of subsequent generations of citizens? Are public attitudes in one period shaped by the discourses and constructions of an earlier generation of political leaders? Using Thatcherism – one variant of the political New Right of the 1980s – as the object of our enquiries, this article explores the extent to which an attitudinal legacy is detectable among the citizens of the UK some 40 years after Margaret Thatcher first became Prime Minister. Our article, drawing on survey data collected in early 2019 (n = 5781), finds that younger generations express and seemingly embrace key tenets of her and her governments’ philosophies. Yet at the same time, they are keen to describe her government’s policies as having ‘gone too far’. Our contribution throws further light on the complex and often covert character of attitudinal legacies. One reading of the data suggests that younger generations do not attribute the broadly Thatcherite values that they hold to Thatcher or Thatcherism since they were socialised politically after such values had become normalised.

scholarly journals Does teaching qualification matter in higher education in the UK? An analysis of National Student Survey data

MethodsX ◽  
2019 ◽  
Vol 6 ◽  
pp. 788-799 ◽  
Author(s):  
Mohammad Nurunnabi ◽  
Abdelhakim Abdelhadi ◽  
Rehab Aburas ◽  
Samaher Fallatah
Keyword(s):  
Higher Education ◽  
Survey Data ◽  
Student Survey ◽  
The Uk

scholarly journals Introduction of standardised packaging and availability of illicit cigarettes: a difference-in-difference analysis of European Union survey data 2015–2018

Thorax ◽  
2020 ◽  
Vol 76 (1) ◽  
pp. 89-91 ◽  
Author(s):  
Anthony A Laverty ◽  
Christopher Millett ◽  
Nicholas S Hopkinson ◽  
Filippos T Filippidis
Keyword(s):  
European Union ◽  
Survey Data ◽  
Tobacco Industry ◽  
Difference In Difference ◽  
Tobacco Products ◽  
Difference Analysis ◽  
Illicit Trade ◽  
European Union Countries ◽  
Before And After ◽  
The Uk

Standardised packaging of tobacco products is intended to reduce the appeal of smoking, but the tobacco industry claims this increases illicit trade. We examined the percentage of people reporting being offered illicit cigarettes before and after full implementation of standardised packaging in the UK, Ireland and France and compared this to other European Union countries. Reported ever illicit cigarette exposure fell from 19.8% to 18.1% between 2015 and 2018 in the three countries fully implementing the policy, and from 19.6% to 17.0% in control countries (p for difference=0.320). Standardised packaging does not appear to increase the availability of illicit cigarettes.

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