The graceful sigmoid: Johan Hjort's contribution to the theory of rational fishing

Published on Oct 1, 2014in Ices Journal of Marine Science3.367
· DOI :10.1093/icesjms/fsu152
Sidney J. Holt6
Estimated H-index: 6
  • References (17)
  • Citations (4)
#2Christina Lockyer (North Atlantic Marine Mammal Commission)H-Index: 17
Last. Hidehiro Kato (Tokyo University of Marine Science and Technology)H-Index: 12
view all 5 authors...
Since the mid-twentieth century, biologists have used counts of baleen whale ear plug growth layer groups (GLGs) to estimate age in studies of commercially hunted whale populations. The deposition rate of GLGs was uncertain until Roe (1968) established that fin whale ear plugs form an annual GLG composed of one lightand one dark-colored lamina. Subsequently, annual rates of GLG deposition were found for minke whales (Balaenoptera acutorostrata), Bryde’s whales (B. brydei), gray whales (Eschricht...
28 CitationsSource
#1Terrance J. QuinnH-Index: 5
#2Richard B. DerisoH-Index: 14
1. Population Growth, Mortality, and the Fishing Process 2. Stock Productivity and Surplus Production 3. Stock and Recruitment 4. Growth and Fecundity 5. Delay-Difference Models 6. Age-Structured Models: Per Recruit and Year-class Models 7. Age Structured Models: Renewal Theory 8. Catch-Age and Age-Structured Assessment Models 9. Size Structured Models and Assessment Methods 10. Migration and Movement 11. Optimal Harvesting
1,523 Citations
#1Tim D. SmithH-Index: 1
Frontispiece Acknowledgements Units used in the text Part I. Introduction: 1. Fluctuations, the very essence of ecosystems Part II. Developing Methods, 1855-1940: 2. Research approaches, 1855-90 3. Measuring the effect of fishing, 1890-1900 4. The International Council for the Exploration of the Sea, 1900-20 5. Predicting fluctuations, 1920-30 6. A priori methods, 1930-40 Part III. Three Partial Theories, 1940-55: 7. Middling in size 8. How many parents are enough? 9. Steady state yield 10. Inte...
186 Citations
#2Sidney J. HoltH-Index: 3
Series foreword A.J. Pitcher. Foreword D. Pauly. Part One: Fundamentals of the theory of fishing, illustrated by analysis of a trawl factoy. Introduction:- theoretical methods in the study of fishery dynamics. The basis of a theoretical model of an exploited fish population and definition of the primary factors. Mathematical representation of the four primary factors. Recruitment. Natural mortality. Fishing mortality. Growth. A simple model giving the annual yield in weight from a fishery in a s...
3,626 Citations
#1Milner B. Schaefer (Inter-American Tropical Tuna Commission)H-Index: 7
Summary The foregoing examples illustrate how the theory developed here may be employed to make estimates concerning the condition of a commercial marine fishery. The examples employed, although having perhaps as complete information as any available for this purpose, leave something to be desired. In particular, in both of these examples, very little or no data are available concerning intensity of fishing and abundance for the early period of development of the fishery, well before the maximum...
1,025 CitationsSource
#1Jerome J. PellaH-Index: 1
369 Citations
2,397 CitationsSource
#2RomeH-Index: 1
3 Citations
HE adjectives anadromous and catadromous are in common use by ichthyologists and biologists in general for fishes which migrate from salt to fresh water or from fresh to salt water to breed. However, this widely understood usage of these terms has been far from universal. Alexander Meek (1916), in the most important general work in English on fish migration, vastly broadened the scope of these terms by applying anadromous to any upward or shoreward migration, even in the sea, and catadromous to ...
209 CitationsSource
#1H. R. HulmeH-Index: 1
#2R. J. H. BevertonH-Index: 1
Last. S. J. HoltH-Index: 1
view all 3 authors...
G. L. KESTEVEN has stressed1 the need for a dynamic approach to the study of fish populations. It has been possible recently to develop a mathematical treatment having certain features in common with that of Baronov2, which bears this necessity in mind, and which we feel will be of value in further consideration of fisheries problems, and in particular has immediate application in the assessment of remedies for overfishing.
9 CitationsSource
Cited By4
#1Jeremy D. Prince (Murdoch University)H-Index: 20
#2Adrian R. Hordyk (UBC: University of British Columbia)H-Index: 9
The cost, complexity and the lack of technical capacity in many countries have made the scientific assessment and sustainable management of data‐poor fisheries a persistent problem. New and innovative approaches are needed to stop the ongoing decline of data‐poor fisheries and loss of coastal biodiversity they are driving. In recent decades, marine protected areas have become the most preferred form of management for study and have been widely implemented as broadly applicable powerful managemen...
2 CitationsSource
Sustained yield is the amount or number of a resource that can be harvested without sending the resource into a decline. Sustainable development is development that meets the current needs of human society without compromising the ability of future generations to meet their needs. Sustained yield and sustainable development both encompass concepts of sustainability. This paper (1) describes the concepts of sustained yield and sustainable development, and (2) explores the linkages, or lack of lin...
#1Olav Sigurd Kjesbu (University of Oslo)H-Index: 8
#2C. Tara Marshall (Aberd.: University of Aberdeen)H-Index: 21
Last. Michael Sinclair (BIO: Bedford Institute of Oceanography)H-Index: 8
view all 6 authors...
1 CitationsSource
Theyear 2014marks the 100th anniversary of JohanHjort’s seminal treatise, Fluctuations in the great fisheries of northern Europe, viewed in the light of biological research. This special issue of the ICES Journal ofMarine Science commemorates this anniversary. The thirty-two articles that appear herein demonstrate the deep influence that Johan Hjort’s work has had, and continues to have, on fisheries and marine science.
9 CitationsSource