Author
Carl G. Jones
Other affiliations: Mauritian Wildlife Foundation, University of Salford
Bio: Carl G. Jones is an academic researcher from Durrell Wildlife Conservation Trust. The author has contributed to research in topics: Population & Endangered species. The author has an hindex of 34, co-authored 106 publications receiving 3401 citations. Previous affiliations of Carl G. Jones include Mauritian Wildlife Foundation & University of Salford.
Papers published on a yearly basis
Papers
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Imperial College London1, Claude Bernard University Lyon 12, Stanford University3, University of Helsinki4, University of Kansas5, University of Glasgow6, Centre national de la recherche scientifique7, University of Oxford8, University of Cambridge9, Auburn University10, Université de Sherbrooke11, Uppsala University12, Norwegian University of Science and Technology13, University of Reading14, University of Florida15, University of Edinburgh16, University of Lausanne17, University of Aberdeen18
TL;DR: Without using life tables, senescence rates in annual individual fitness is examined using 20 individual-based data sets of terrestrial vertebrates with contrasting life histories and body size to assess the robustness of the prevalent life-table approach.
Abstract: Comparative analyses of survival senescence by using life tables have identified generalizations including the observation that mammals senesce faster than similar-sized birds. These generalizations have been challenged because of limitations of life-table approaches and the growing appreciation that senescence is more than an increasing probability of death. Without using life tables, we examine senescence rates in annual individual fitness using 20 individual-based data sets of terrestrial vertebrates with contrasting life histories and body size. We find that senescence is widespread in the wild and equally likely to occur in survival and reproduction. Additionally, mammals senesce faster than birds because they have a faster life history for a given body size. By allowing us to disentangle the effects of two major fitness components our methods allow an assessment of the robustness of the prevalent life-table approach. Focusing on one aspect of life history - survival or recruitment - can provide reliable information on overall senescence.
322 citations
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TL;DR: This paper evaluated the loss of genetic variation that resulted from this bottleneck by typing 12 microsatellite DNA loci in museum skins up to 170 years old and from modern kestrels.
Abstract: The population of Mauritius kestrels is thought to have recovered from a single wild breeding pair in 19741, when its prospects were considered to be hopeless, to over 200 pairs today2 Here we evaluate the loss of genetic variation that resulted from this bottleneck by typing 12 microsatellite DNA loci in museum skins up to 170 years old and from modern kestrels We find that ancestral variation was remarkably high and comparable to continental kestrel species This shows that the unexpected resilience of the population could not have been due either to benefits contributed by an undetected remnant population or to reduction of the inbreeding genetic load by a history of small population size3
196 citations
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Norwegian University of Science and Technology1, University of Cape Town2, University of Kansas3, University of California, Los Angeles4, Auburn University5, Université de Sherbrooke6, Claude Bernard University Lyon 17, Mauritian Wildlife Foundation8, Durrell Wildlife Conservation Trust9, University of Reading10
TL;DR: Based on long-term studies of growing populations of birds and mammals, population dynamics is analyzed by using fluctuations in the total reproductive value of the population to account for random fluctuations in age distribution.
Abstract: A major question in ecology is how age-specific variation in demographic parameters influences population dynamics. Based on long-term studies of growing populations of birds and mammals, we analyze population dynamics by using fluctuations in the total reproductive value of the population. This enables us to account for random fluctuations in age distribution. The influence of demographic and environmental stochasticity on the population dynamics of a species decreased with generation time. Variation in age-specific contributions to total reproductive value and to stochastic components of population dynamics was correlated with the position of the species along the slow-fast continuum of life-history variation. Younger age classes relative to the generation time accounted for larger contributions to the total reproductive value and to demographic stochasticity in "slow" than in "fast" species, in which many age classes contributed more equally. In contrast, fluctuations in population growth rate attributable to stochastic environmental variation involved a larger proportion of all age classes independent of life history. Thus, changes in population growth rates can be surprisingly well explained by basic species-specific life-history characteristics.
166 citations
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Texas A&M University1, University of Colorado Boulder2, University of Canterbury3, British Antarctic Survey4, Cooperative Research Centre5, CSIRO Marine and Atmospheric Research6, University of New South Wales7, Ohio State University8, Australian Antarctic Division9, Scientific Committee on Antarctic Research10, Victoria University of Wellington11, Lamont–Doherty Earth Observatory12, Polar Research Institute of China13, University of Hamburg14, University of Waikato15, Federal University of Rio de Janeiro16, University of Pretoria17, University of Massachusetts Amherst18, Stanford University19, National Academy of Sciences20, University of California, Berkeley21, Hokkaido University22, Antarctica New Zealand23, Alfred Wegener Institute for Polar and Marine Research24, Royal Belgian Institute of Natural Sciences25, University of Alberta26, University of Tasmania27, Hubert Curien Multi-disciplinary Institute28, Instituto Antártico Chileno29, Arctic and Antarctic Research Institute30, Autonomous University of Madrid31, University of Buenos Aires32, University of Cambridge33
TL;DR: A co-ordinated portfolio of cross-disciplinary science, based on new models of international collaboration, will be essential as no scientist, programme or nation can realize these aspirations alone.
Abstract: Antarctic and Southern Ocean science is vital to understanding natural variability, the processes that govern global change and the role of humans in the Earth and climate system. The potential for new knowledge to be gained from future Antarctic science is substantial. Therefore, the international Antarctic community came together to 'scan the horizon' to identify the highest priority scientific questions that researchers should aspire to answer in the next two decades and beyond. Wide consultation was a fundamental principle for the development of a collective, international view of the most important future directions in Antarctic science. From the many possibilities, the horizon scan identified 80 key scientific questions through structured debate, discussion, revision and voting. Questions were clustered into seven topics:i)Antarcticatmosphereandglobal connections,ii)Southern Oceanand sea iceina warmingworld, iii) ice sheet and sea level, iv) the dynamic Earth, v) life on the precipice, vi) near-Earth space and beyond, and vii) human presence in Antarctica. Answering the questions identified by the horizon scan will require innovative experimental designs, novel applications of technology, invention of next-generation field and laboratory approaches, and expanded observing systems and networks. Unbiased, non-contaminating procedures will be required to retrieve the requisite air, biota, sediment, rock, ice and water samples. Sustained year-round accesstoAntarcticaand the Southern Ocean willbe essential to increase winter-time measurements. Improved models are needed that represent Antarctica and the Southern Ocean in the Earth System, and provide predictions at spatial and temporal resolutions useful for decision making. A co-ordinatedportfolio ofcross-disciplinaryscience, based on new models ofinternational collaboration, will be essential as no scientist, programme or nation can realize these aspirations alone.
156 citations
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TL;DR: In this paper, the authors examined size variation in the maximum diameter of the upper canine tooth (the prey-killing organ) and skull length of the small Indian mongoose (Herpestes javanicus).
Abstract: In western parts of its native range, the small Indian mongoose (Herpestes javanicus) is sympatric with one or both of two slightly larger congeners. In the eastern part of its range, these species are absent. The small Indian mongoose was introduced, about a century ago, to the West Indies, the Hawaiian islands, Mauritius, the Fijian islands, and Okinawa. All introductions except possibly that to Mauritius were from the region of Calcutta and Bangladesh, where it is sympatric with both congeners. No other mongoose is present on any of these islands. In each instance, the introduced population derived from a small propagule. We examined size variation in the maximum diameter of the upper canine tooth (the prey-killing organ) and skull length. In the eastern (allopatric) part of its native range, males of the small Indian mongoose are much larger in both traits than in the western (sympatric) regions, approaching the size of the smaller of its absent two congeners, Herpestes edwardsii. Females from the allopatric part of the range are also larger than those of the source region. The species is more sexually dimorphic in the region of allopatry. On all islands to which it has been introduced, in 100-200 generations the small Indian mongoose has increased in male size and in sexual dimorphism; changes in female size have been slight and inconsistent. In general, sizes of island individuals are approx- imately intermediate in size between those in the region of origin (where they are sympatric and small) and those in the region of allopatry. Sexual dimorphism is greatest for canine diameter. Thus, H. javanicus shows variation consistent with ecological release from com- petition with its congeners. There is no evidence on whether this variation is genetic, nor on what dietary items might be partitioned between species and between sexes. However, morphological variation is consistently smaller for both traits and both sexes on the islands of introduction than in any part of the native range, consistent with idea of a genetic bottleneck imposed by the small propagule size. Neither of the two congeneric mongooses shows morphological variation consistent with ecological release from competition with H. javanicus in the southern part of their ranges, where the latter species is absent.
149 citations
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TL;DR: Deming's theory of management based on the 14 Points for Management is described in Out of the Crisis, originally published in 1982 as mentioned in this paper, where he explains the principles of management transformation and how to apply them.
Abstract: According to W. Edwards Deming, American companies require nothing less than a transformation of management style and of governmental relations with industry. In Out of the Crisis, originally published in 1982, Deming offers a theory of management based on his famous 14 Points for Management. Management's failure to plan for the future, he claims, brings about loss of market, which brings about loss of jobs. Management must be judged not only by the quarterly dividend, but by innovative plans to stay in business, protect investment, ensure future dividends, and provide more jobs through improved product and service. In simple, direct language, he explains the principles of management transformation and how to apply them.
9,241 citations
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2,730 citations
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TL;DR: There is now sufficient evidence to regard the controversies regarding the contribution of genetic factors to extinction risk as resolved, and if genetic factors are ignored, extinction risk will be underestimated and inappropriate recovery strategies may be used.
1,981 citations
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TL;DR: It is concluded that management limiting gene flow among introduced populations may reduce adaptive potential but is unlikely to prevent expansion or the evolution of novel invasive behaviour.
Abstract: Invasive species are predicted to suffer from reductions in genetic diversity during founding events, reducing adaptive potential. Integrating evidence from two literature reviews and two case studies, we address the following questions: How much genetic diversity is lost in invasions? Do multiple introductions ameliorate this loss? Is there evidence for loss of diversity in quantitative traits? Do invaders that have experienced strong bottlenecks show adaptive evolution? How do multiple introductions influence adaptation on a landscape scale? We reviewed studies of 80 species of animals, plants, and fungi that quantified nuclear molecular diversity within introduced and source populations. Overall, there were significant losses of both allelic richness and heterozygosity in introduced populations, and large gains in diversity were rare. Evidence for multiple introductions was associated with increased diversity, and allelic variation appeared to increase over long timescales (~100 years), suggesting a role for gene flow in augmenting diversity over the long-term. We then reviewed the literature on quantitative trait diversity and found that broad-sense variation rarely declines in introductions, but direct comparisons of additive variance were lacking. Our studies of Hypericum canariense invasions illustrate how populations with diminished diversity may still evolve rapidly. Given the prevalence of genetic bottlenecks in successful invading populations and the potential for adaptive evolution in quantitative traits, we suggest that the disadvantages associated with founding events may have been overstated. However, our work on the successful invader Verbascum thapsus illustrates how multiple introductions may take time to commingle, instead persisting as a 'mosaic of maladaptation' where traits are not distributed in a pattern consistent with adaptation. We conclude that management limiting gene flow among introduced populations may reduce adaptive potential but is unlikely to prevent expansion or the evolution of novel invasive behaviour.
1,588 citations
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TL;DR: It is shown that, although biodiversity can never be fully captured by a single number, study of particular facets has led to rapid, exciting and sometimes alarming discoveries.
Abstract: The term 'biodiversity' is a simple contraction of 'biological diversity', and at first sight the concept is simple too: biodiversity is the sum total of all biotic variation from the level of genes to ecosystems. The challenge comes in measuring such a broad concept in ways that are useful. We show that, although biodiversity can never be fully captured by a single number, study of particular facets has led to rapid, exciting and sometimes alarming discoveries. Phylogenetic and temporal analyses are shedding light on the ecological and evolutionary processes that have shaped current biodiversity. There is no doubt that humans are now destroying this diversity at an alarming rate. A vital question now being tackled is how badly this loss affects ecosystem functioning. Although current research efforts are impressive, they are tiny in comparison to the amount of unknown diversity and the urgency and importance of the task.
1,220 citations