scholarly journals A meta-analysis of the status of ICES fish stocks during the past half century

2007 ◽  
Vol 64 (4) ◽  
pp. 707-713 ◽  
Author(s):  
Henrik Sparholt ◽  
Mette Bertelsen ◽  
Hans Lassen
Keyword(s):  
Time Series ◽  
Meta Analysis ◽  
Fishing Mortality ◽  
Fish Stocks ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
The Status ◽  
1960S And 1970S ◽  
Past Half

Abstract Sparholt, H., Bertelsen, M., and Lassen, H. 2007. A meta-analysis of the status of ICES fish stocks during the past half century. – ICES Journal of Marine Science, 64: 707–713. Based on a meta-analysis of time-series of stock size, recruitment, and fishing mortality, the general status of fish stocks within the ICES Area (i.e. the Northeast Atlantic) is evaluated. The analysis is based on data for 34 (7 pelagic, 27 demersal) commercial stocks. The stocks were selected based on the quality of the data and the length of the time-series. The analysis indicates that most pelagic stocks recovered to sustainable levels with high productivity after several had collapsed in the 1960s and 1970s. In contrast, most demersal stocks have continued to decline over the past half century and are now recruitment-overfished. By reducing fishing mortality on demersal stocks on average by half and building up the stocks by a factor of about two, management could be brought in line with international agreements. If recruitment-overfishing is avoided for all demersal stocks and discarding is minimized, their yield might be almost doubled over the current yield. Among the major management initiatives during the past half century, only the closure of the pelagic fisheries in the mid-1970s can be clearly identified in the time-series as having had a direct effect on stock status.

scholarly journals IS IT POSSIBLE TO SAVE THE AZOV BELUGA?

Fisheries ◽  
2020 ◽  
Vol 2020 (3) ◽  
pp. 71-75
Author(s):  
Sergey Podushka
Keyword(s):  
Huso Huso ◽  
Brood Stock ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
The Status ◽  
Past Half

The Azov beluga Huso huso maeoticus has the status of a subspecies. This is one of the most threatened and problematic species of the Russian ichthyofauna. Despite the measures taken to protect this subspecies, the situation has only worsened over the past half-century. Some authors already consider the Azov Beluga to be extinct. Brood stock of the beluga raised at the Don Sturgeon Plant, where the first females began to mature in 2018, lets us hope for the possibility of saving the Azov subspecies. Presumably the herd consists of both Azov and Caspian belugas, as well as hybrids between them. The issue of their identification is being discussed. A plan to preserve a clean line of the Azov Beluga is proposed.

Reframing the Sciences of the Long Eighteenth Century

2020 ◽  
Vol 50 (1-2) ◽  
pp. 58-66
Author(s):  
Giuliano Pancaldi
Keyword(s):  
Eighteenth Century ◽  
History Of Science ◽  
Science Policy ◽  
Special Issue ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
History Of ◽  
Long Eighteenth Century ◽  
Past Half

Here I survey a sample of the essays and reviews on the sciences of the long eighteenth century published in this journal since it was founded in 1969. The connecting thread is some historiographic reflections on the role that disciplines—in both the sciences we study and the fields we practice—have played in the development of the history of science over the past half century. I argue that, as far as disciplines are concerned, we now find ourselves a bit closer to a situation described in our studies of the long eighteenth century than we were fifty years ago. This should both favor our understanding of that period and, hopefully, make the historical studies that explore it more relevant to present-day developments and science policy. This essay is part of a special issue entitled “Looking Backward, Looking Forward: HSNS at 50,” edited by Erika Lorraine Milam.

The Twentysomething Soul

2019 ◽  
Author(s):  
Tim Clydesdale ◽  
Kathleen Garces-Foley
Keyword(s):  
Young Adults ◽  
Religious Commitment ◽  
Religion And Spirituality ◽  
Lost Generation ◽  
Full Spectrum ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Past Half ◽  
The Way

Few realize how much Americans’ journey through their twenties has changed during the past half-century or understand how incorrect popular assumptions about young adults’ religious, spiritual, and secular lives are. Today’s twentysomethings have been labelled the “lost generation”—for their presumed inability to identify and lead fulfilling lives, “kidults”—for their alleged refusal to “grow up” and accept adult responsibilities, and the “least religious generation”—for their purported disinterest in religion and spirituality. These characterizations are not only unflattering, they are deeply flawed. The Twentysomething Soul tells an optimistic story about American twentysomethings. Drawing on hundreds of interviews and a survey of thousands across America, it introduces readers to the full spectrum of American young adults, many of whom live purposefully, responsibly, and reflectively. Some prioritize faith and spirituality. Others reject their childhood religion to explore alternatives and practice a personal spirituality. Still others sideline religion and spirituality until their lives get settled or reject organized religion completely. There is change occurring in the religious and spiritual lives of young adults, but little of it is among the 1 in 4 American twentysomethings who have consistently prioritized religious commitment during the past half-century. The change is rather among the now 3 in 10 young adults who, though intentionally unaffiliated with religion, affirm a variety of religious, spiritual, and secular beliefs. The Twentysomething Soul will change the way readers view contemporary young adults, giving an accurate—and refreshing—understanding of their religious, spiritual, and secular lives.

Oxford Studies in Philosophy of Religion Volume 9

2019 ◽  
Keyword(s):  
Philosophy Of Science ◽  
Philosophy Of Language ◽  
Philosophy Of Religion ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Inclusive Approach ◽  
Past Half

This is the ninth volume of Oxford Studies in Philosophy of Religion. As with earlier volumes, these essays follow the tradition of providing a non-sectarian and non-partisan snapshot of the subdiscipline of philosophy of religion. This subdiscipline has become an increasingly important one within philosophy over the last century, and especially over the past half century, having emerged as an identifiable subfield with this timeframe along with other emerging subfields such as the philosophy of science and the philosophy of language. This volume continues the initial intention behind the series of attracting the best work from the premier philosophers of religion, as well as including work by top philosophers outside this area when their work and interests intersect with issues in the philosophy of religion. This inclusive approach to the series provides an opportunity to mitigate some of the costs of greater specialization in our discipline, while at the same time inviting wider interest in the work being done in the philosophy of religion.

Some new maxims of chancery: ‘Explicated for the more facile introduction of such as are studiously addicted to that noble profession’†

2021 ◽  
Author(s):  
Sham Qayyum
Keyword(s):  
Stage I ◽  
Half Century ◽  
The Past ◽  
Teaching Aid ◽  
Past Half Century ◽  
Past Half

Abstract Over the past half century, the trust has undergone momentous change. A generation of Chancery practitioners reduced it from being a doctrine to a loophole. What, perhaps, many did not realise was that the changes would mostly be for the worse. Before explaining which aspects of the modern express trust trouble my conscience, I divide its history into Three Ages of the Trust. We now live in the Age of the Loophole Trust (1969–). To help us understand this latest stage, I utilise equity’s most venerable teaching aid – the maxim. My remarks are structured around three new (surreptitious) maxims.

scholarly journals Budgeting nitrogen flows and the food nitrogen footprint of Egypt during the past half century: Challenges and opportunities

2019 ◽  
Vol 130 ◽  
pp. 104895 ◽  
Author(s):  
Ahmed S. Elrys ◽  
Sajjad Raza ◽  
Ahmed I. Abdo ◽  
Zhanjun Liu ◽  
Zhujun Chen ◽  
...  
Keyword(s):  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Challenges And Opportunities ◽  
Past Half ◽  
Nitrogen Flows

scholarly journals Undergraduate Econometrics Instruction: Through Our Classes, Darkly

2017 ◽  
Vol 31 (2) ◽  
pp. 125-144 ◽  
Author(s):  
Joshua D. Angrist ◽  
Jörn-Steffen Pischke
Keyword(s):  
Paradigm Shift ◽  
Causal Effects ◽  
Economic Research ◽  
Back Seat ◽  
The Past ◽  
Past Half Century ◽  
1960S And 1970S ◽  
The 1960S ◽  
Past Half ◽  
Classical Regression

The past half-century has seen economic research become increasingly empirical, while the nature of empirical economic research has also changed. In the 1960s and 1970s, an empirical economist's typical mission was to “explain” economic variables like wages or GDP growth. Applied econometrics has since evolved to prioritize the estimation of specific causal effects and empirical policy analysis over general models of outcome determination. Yet econometric instruction remains mostly abstract, focusing on the search for “true models” and technical concerns associated with classical regression assumptions. Questions of research design and causality still take a back seat in the classroom, in spite of having risen to the top of the modern empirical agenda. This essay traces the divergent development of econometric teaching and empirical practice, arguing for a pedagogical paradigm shift.

Vowel system universals and typology: prologue to theory

1984 ◽  
Vol 1 ◽  
pp. 75-111 ◽  
Author(s):  
Roger Lass
Keyword(s):  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Work Done ◽  
Past Half

Considering all the work done on vowel system typology and universals in the past half-century (Trubetzkoy 1929, 1939; Hockett Sedlak 1969; Crothers 1978), my title may seem rather arrogant. There are after all theories of vocalic organisation about, or at least models and taxonomies; there are even attempts to explain why certain implicational universals seem to hold (from Jakobson's [laws of solidarity] (1968) to the more sophisticated treatments in Liljencrants & Lindblom 1972; Kim 1973; etc.).

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