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Modelling The Population Dynamics Of Antarctic Krill
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Book Synopsis Modelling the Population Dynamics of Antarctic Krill by : Siri Rackebrandt
Download or read book Modelling the Population Dynamics of Antarctic Krill written by Siri Rackebrandt and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Antarctic krill is a shrimp-like crustacean that plays a crucial role in the Southern Ocean food web. Its life cycle is finely tuned to the strong seasonal changes in its environment. One aim of this thesis was to elucidate the role of a biological clock for the timing of the reproduction. For this purpose, a mathematical model was developed which describes the dynamics of juvenile and adult krill, two different food sources and one nutrient as well as their dependence on the environment. The second aim of this thesis was to analyze the impact of climate change on krill. Either krill has to adapt to changes in sea ice conditions or it might be forced to move to higher latitudes. The model results suggest that krill densities increase in both cases due to higher phytoplankton growth. Although the magnitude of increase in krill density has probably been overestimated, the model results suggest that the effect of climate change on krill might not be as negative as previously suggested. engl.
Book Synopsis A length class model of the population dynamics of the Antarctic krill Euphausia superba Dana by : H. ASTHEIMER
Download or read book A length class model of the population dynamics of the Antarctic krill Euphausia superba Dana written by H. ASTHEIMER and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biology and Ecology of Antarctic Krill by : Volker Siegel
Download or read book Biology and Ecology of Antarctic Krill written by Volker Siegel and published by Springer. This book was released on 2016-08-03 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a unique insight into the current knowledge of krill population dynamics including distribution, biomass, production, recruitment, growth and mortality rates. Detailed analysis is provided on food and feeding, reproduction and krill behaviour. The volume provides an overview on the aspects of natural challenges to the species, which involve predation, parasites and the commercial exploitation of the resource and its management. A chapter on genetics shows the results of population subdivision and summarizes recent work on sequencing transcriptomes for studying gene function as part of the physiology of live krill. The focus of Chapter 4 is on physiological functions such as biochemical composition, metabolic activity and growth change with ontogeny and season; and will demonstrate which environmental factors are the main drivers for variability. Further discussed in this chapter are the bottle necks which occur in the annual life cycle of krill, and the mechanisms krill have adapted to cope with severe environmental condition.
Book Synopsis Modelling Southern Ocean krill population dynamics by : E.J. MURPHY
Download or read book Modelling Southern Ocean krill population dynamics written by E.J. MURPHY and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Population Dynamics of Whale, Seal, and Krill in the Antarctic by : Laura May Wohlgezogen
Download or read book Population Dynamics of Whale, Seal, and Krill in the Antarctic written by Laura May Wohlgezogen and published by . This book was released on 2008 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling the growth dynamics of Antarctic krill Euphausia superba by : E.E. HOFMANN
Download or read book Modeling the growth dynamics of Antarctic krill Euphausia superba written by E.E. HOFMANN and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Douglas George Chapman Publisher :International Co-Operative Publishing House ISBN 13 : Total Pages :332 pages Book Rating :4.:/5 (319 download)
Book Synopsis Quantitative Population Dynamics by : Douglas George Chapman
Download or read book Quantitative Population Dynamics written by Douglas George Chapman and published by International Co-Operative Publishing House. This book was released on 1981 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic adaptation and models of population dynamics. The habitat equation: a useful concept in population modeling. Exploitative competition in transient habitat patches. Population adaptation to a 'Noisy'environment: stochastic analogs of some deterministic models. Correlation and spectral analyses of the dynamics of a controlled rotifer population. Dinamic equilibria of helminthic infections?. A population model with two delays. Stability of model systems describing prey-predator communities. Surplus yield models od fisheries management. An approach to analyzing age data. An age structure model of yellow perch in western Lake Erie. The use of leslie-type age-structure models for the Pacific halibut population.
Book Synopsis Biology and Ecology of the Antarctic Krill (Euphausia Superba Dana) by : D. G. M. Miller
Download or read book Biology and Ecology of the Antarctic Krill (Euphausia Superba Dana) written by D. G. M. Miller and published by . This book was released on 1989 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resolving Variability in Size Structure in an Individual-based Model for the North Pacific Krill, Euphausia Pacifica by : Roxanne Robertson
Download or read book Resolving Variability in Size Structure in an Individual-based Model for the North Pacific Krill, Euphausia Pacifica written by Roxanne Robertson and published by . This book was released on 2021 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Individual-based models (IBMs) have emerged as a powerful tool for ecological research and are particularly well suited to studies of plankton ecology. In this thesis, I develop an IBM for the North Pacific krill, Euphausia pacifica, with the goal of replicating observed variability in size-structure in the northern California Current Ecosystem. Krill, and E. pacifica in particular, are central to the structure and function of the California Current Ecosystem. Their response to environmental forcing translates climate variability to higher trophic levels and underpins broader ecosystem responses. Recent observations indicate environmental and climate-related shifts in E. pacifica size distributions, which have important implications for understanding krill production dynamics and ecosystem interactions. I advance existing IBMs for E. pacifica by enabling temperature-dependent maturation and incorporating other observed relationships that were not captured in published models. I used a pattern-oriented modeling approach to develop a model capable of resolving realistic size and growth dynamics. Patterns in model output were compared to population size distributions from field-based observations off northern California. Modifications to the model were incorporated based on discrepancies between model output and field observations. The resulting IBM represents a clear advancement toward obtaining accurate predictions of E. pacifica growth and size dynamics. The model captures seasonal and interannual patterns in growth and size across most life history stages. In addition to size dynamics, model-generated development, growth, and reproductive rates are generally consistent with field observations. Improved predictions of E. pacifica dynamics have implications across a broad range of issues, including estimates of forage biomass and research focused on life history strategies and population dynamics. The enhanced IBM I have developed strengthens the foundation for such models to serve as tools for broader examination of dynamics within the California Current Ecosystem.
Book Synopsis Modelling the Krill-predator Dynamics of the Antarctic Ecosystem by : Mitsuyo Mori
Download or read book Modelling the Krill-predator Dynamics of the Antarctic Ecosystem written by Mitsuyo Mori and published by . This book was released on 2005 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Food Webs written by John C. Moore and published by Cambridge University Press. This book was released on 2018 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new approaches to studying food webs, using practical and policy examples to demonstrate the theory behind ecosystem management decisions.
Book Synopsis Modeling Studies of Antarctic Krill (Euphausia Superba) Survival During Transport Across the Scotia Sea and Environs by : Bettina Andrea Fach
Download or read book Modeling Studies of Antarctic Krill (Euphausia Superba) Survival During Transport Across the Scotia Sea and Environs written by Bettina Andrea Fach and published by . This book was released on 2003 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Report of Activities by : Southwest Fisheries Center (U.S.)
Download or read book Report of Activities written by Southwest Fisheries Center (U.S.) and published by . This book was released on 1995 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Krill written by Inigo Everson and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Krill, or euphausiids, a group of immense importance in marine ecosystems, comprises over 80 species, most of which are planktonic. Krill are widespread with species to be found in all the oceans of the world. Their numerical density in some regions increases their importance to marine ecosystems and has led to commercially successful krill harvesting. This comprehensive volume, thoroughly edited by Inigo Everson, well known for his work in this area, comprises chapters written by internationally acknowledged experts. The contents include coverage of: sampling and distribution, population, aggregation, reproduction and the role of krill in the ecosystem. Further specific chapters include krill harvesting, products and details of management in Japanese, Canadian and Southern Ocean waters. Drawing on the experience in each, the ecosystem approach to management is discussed in detail and how it might be applied more widely for example in forage fisheries. This most important volume draws together, for the first time, a vast amount of vital information for all those involved in work on these important marine organisms. Krill will be of great use to fisheries scientists, marine biologists and ecologists, oceanographers, zoologists and invertebrate biologists and all those involved in the commercial harvesting, exploitation and management of krill, world wide. Libraries in all aquatic and marine research stations and universities where marine and fisheries sciences are studied and taught should have multiple copies of this landmark publication on their shelves. Contributions from internationally-recognised experts in the field. Well-edited to provide an accessible and user-friendly book. Krill are a key part of ocean ecosystems. Part of exciting new Blackwell Science Series.
Book Synopsis The Curious Life of Krill by : Stephen Nicol
Download or read book The Curious Life of Krill written by Stephen Nicol and published by Island Press. This book was released on 2018-05-08 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Makes you feel as if you're part of an engaging dinnertime conversation." --Science News Krill. It's a familiar word that conjures oceans, whales, and swimming crustaceans. Scientists say they are one of most abundant animals on the planet. But few can accurately describe krill or explain their ecological importance. Eminent krill scientist Stephen Nicol wants us to know more about these enigmatic creatures and how we can protect them as Antarctic ice melts. This engaging account takes us to the Southern Ocean to learn firsthand the difficulties and rewards of studying krill in their habitat. From his early education about the sex lives of krill in the Bay of Fundy to a krill tattoo gone awry, Nicol uses humor and personal stories to bring the biology and beauty of krill alive.
Book Synopsis Antarctic Ocean and Resources Variability by : Dietrich Sahrhage
Download or read book Antarctic Ocean and Resources Variability written by Dietrich Sahrhage and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the intensification of research activities in the Southern Ocean in recent years, both at national levels and through international cooperation in such projects as BIOMASS with its FIBEX and SIBEX phases, the need was felt increasingly for closer collaboration between biologists, meteorologists, and oceanographers in the study of the interaction between the atmospheric forces, the water masses, and the living resources. Better knowledge in this regard is not only of scientific interest but also of practical importance, especially for the management of the resources and the protection of the Antarctic marine ecosystem. As a follow-up on a recommendation by the IOC Program Group for the Southern Oceans made in March 1983, the Intergovernmental Oceanographic Commission organized a meeting of experts on oceanography related to the dynamics of the Antarctic ecosystems. During this meeting, held in Kiel, Federal Republic of Ger many, in May 1984, biologists and oceanographers involved in BIOMASS activities met with the oceanographers of SCOR Working Group 74 to discuss ways and means for additional physical and chemical observations in the oceanographic research within BIOMASS. It was the time when large fluctuations in the distribution of krill with subsequent detrimental effects on predator species dependent on krill had just been observed, and the question arose whether this was possibly the result of changes in the Antarctic water circulation.
Book Synopsis Frontiers in Mathematical Biology by : Simon A. Levin
Download or read book Frontiers in Mathematical Biology written by Simon A. Levin and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: From a mathematical point of view, physiologically structured population models are an underdeveloped branch of the theory of infinite dimensional dynamical systems. We have called attention to four aspects: (i) A choice has to be made about the kind of equations one extracts from the predominantly verbal arguments about the basic assumptions, and subsequently uses as a starting point for a rigorous mathematical analysis. Though differential equations are easy to formulate (different mechanisms don't interact in infinites imal time intervals and so end up as separate terms in the equations) they may be hard to interpret rigorously as infinitesimal generators. Integral equations constitute an attractive alternative. (ii) The ability of physiologically structured population models to increase our un derstanding of the relation between mechanisms at the i-level and phenomena at the p-level will depend strongly on the development of dynamical systems lab facilities which are applicable to this class of models. (iii) Physiologically structured population models are ideally suited for the for mulation of evolutionary questions. Apart from the special case of age (see Charlesworth 1980, Yodzis 1989, Caswell 1989, and the references given there) hardly any theory exists at the moment. This will, hopefully, change rapidly in the coming years. Again the development of appropriate software may turn out to be crucial.
