- I work as a professor, researcher and analyst to map global fisheries, and their interactions with marine ecosystems.... moreI work as a professor, researcher and analyst to map global fisheries, and their interactions with marine ecosystems. With over 40 years of experience with international fisheries - both hands-on and computer modelling, I collaborate in global studies of marine biodiversity, economics of fishing, and impacts on birds and mammals; and desire to develop better ways to assess the health of exploited marine systems, the impacts of climate change, and the social consequences of mismanagement. see my pages http://ecomarres.com/?page_id=92edit
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... Jackson e colegas mostraram que o declínio massivo das populações de mamíferos marinhos, tartarugas, pássaros e grandes peixes, ocorreram em todas as linhas costeiras onde as pessoas vivem desde muito antes do período examinados por... more
... Jackson e colegas mostraram que o declínio massivo das populações de mamíferos marinhos, tartarugas, pássaros e grandes peixes, ocorreram em todas as linhas costeiras onde as pessoas vivem desde muito antes do período examinados por nós. ...
Formal analyses of long-term global marine fisheries prospects have yet to be performed because fisheries research focuses on local, species-specific management issues. Extrapolation of present trends implies expansion of bottom fisheriesinto deeper waters, serious impact on biodiversity, and dec...more
RASHT, IRAN—In a cavernous hall packed with navalgray steel tanks, a precious commodity is being enriched and multiplied. No, this is not a hitherto undeclared uranium facility in Iran's nuclear program: It'sa breeding facility... more
RASHT, IRAN—In a cavernous hall packed with navalgray steel tanks, a precious commodity is being enriched and multiplied. No, this is not a hitherto undeclared uranium facility in Iran's nuclear program: It'sa breeding facility for Caspian sturgeons. Each tank is filled with fish of various ages, from fingerlings, a few centimeters long with crocodilian snouts, to meter-long juveniles. Here at the International Sturgeon Research Institute (ISRI) in the northern town of Rasht, scientists are refining techniques for rearing fingerlings that ...
La pêche industrielle épuise les mers. A l'échelle de la planète, les prises diminuent parce que les populations ne se renouvellent plus. Face à cette évolution préoccupante, une idée gagne du terrain: constituer de véritables... more
La pêche industrielle épuise les mers. A l'échelle de la planète, les prises diminuent parce que les populations ne se renouvellent plus. Face à cette évolution préoccupante, une idée gagne du terrain: constituer de véritables réserves marines dans des zones de plusieurs dizaines de milliers de kiomètres carrés.
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Información del artículo Mares esquilmados.
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Georges Bank--the patch of relatively shallow ocean just off the coast of Nova Scotia, Canada--used to teem with fish. Writings from the 17th century record that boats were often surrounded by huge schools of cod, salmon, striped bass and... more
Georges Bank--the patch of relatively shallow ocean just off the coast of Nova Scotia, Canada--used to teem with fish. Writings from the 17th century record that boats were often surrounded by huge schools of cod, salmon, striped bass and sturgeon. Today it is a very different story. Trawlers trailing dredges the size of football fields have literally scraped the bottom clean, harvesting an entire ecosystem--including supporting substrates such as sponges--along with the catch of the day. Farther up the water column, longlines and drift nets are snagging the last sharks, ...
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Research Interests: Zoology, Marine Ecology, Ecology, Marine Mammals, Ecological Niche Modeling, and 12 moreEcological Modelling, Sea surface temperature, Global Information Systems, Habitat Suitability, Environmental Conditions, Minke whale, Marine Environment, Tiger Habitat Suitability model, Expert knowledge, Humpback whale, Marine Mammal, and Large Scale
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The growing human population must be fed, but historic land-based systems struggle to meet expanding demand. Marine production supports some of the world's poorest people but increasingly provides for the needs of the affluent, either... more
The growing human population must be fed, but historic land-based systems struggle to meet expanding demand. Marine production supports some of the world's poorest people but increasingly provides for the needs of the affluent, either directly by fishing or via fodder-based feeds for marine and terrestrial farming. Here we show the expanding footprint of humans to utilize global ocean productivity to feed themselves. Our results illustrate how incrementally each year, marine foods are sourced farther from where they are consumed and moreover, require an increasing proportion of the ocean's primary productivity that underpins all marine life. Though mariculture supports increased consumption of seafood, it continues to require feeds based on fully exploited wild stocks. Here we examine the ocean's ability to meet our future demands to 2100 and find that even with mariculture supplementing near-static wild catches our growing needs are unlikely to be met without significan...
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Research Interests: Science, Marine Conservation, Population Dynamics, International Cooperation, Marine biodiversity, and 22 moreBiodiversity, Multidisciplinary, Sustainable forest management, Humans, Anthozoa, Animals, Invasive Alien Species, Vertebrates, Extinction Risk, Plants, Nitrogen, Trees, Convention on Biological Diversity, Climate change impact, Ecosystem, Population Trend, Time Factors, Protected Area, BIODIVERSITY LOSS, Internationality, Conservation of Natural Resources, and Community Composition
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Research Interests: Zoology, Environmental Science, Environmental policy, Fisheries, Biomass, and 19 moreInvertebrates, Ecology, Policy Development, Marine biodiversity, Biodiversity, Multidisciplinary, Nature, Animals, Stock assessment, Plankton, Fishes, Human Activities, Trophic Level, Human impact, Ecosystem, Aquatic organisms, Food Chain, Marine ecosystem, and Fishing Impact
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Research Interests: Zoology, Marine Ecology, Ecology, Marine Mammals, Ecological Niche Modeling, and 12 moreEcological Modelling, Sea surface temperature, Global Information Systems, Habitat Suitability, Environmental Conditions, Minke whale, Marine Environment, Tiger Habitat Suitability model, Expert knowledge, Humpback whale, Marine Mammal, and Large Scale
Executive Summary The Chinese demand for shark fins to be served in shark fin soup has grown rapidly since the 1980s. This growth has generated an increase in the number of fisheries targeting sharks, and consequently the number of sharks... more
Executive Summary The Chinese demand for shark fins to be served in shark fin soup has grown rapidly since the 1980s. This growth has generated an increase in the number of fisheries targeting sharks, and consequently the number of sharks caught worldwide each year. As a result of increased fishing pressure, many species are currently threatened or at risk of becoming threatened with extinction in the near future.
Abstract Two new lepocreadiid digeneans, Tetracerasta blepta, gen. sp. nov., and Stegodexamene callista, sp. nov., are described from the intestine of the long-finned freshwater eel, Anguilla reinhardtii, in the Brisbane River,... more
Abstract Two new lepocreadiid digeneans, Tetracerasta blepta, gen. sp. nov., and Stegodexamene callista, sp. nov., are described from the intestine of the long-finned freshwater eel, Anguilla reinhardtii, in the Brisbane River, Queensland, and from the Australian bass, Macquaria novemaculeata, in the Richmond River in New South Wales. Their life cycles have been elucidated and completed in the laboratory, by means of uninfected hosts. Both lepocreadiid species use the prosobranch gastropod, Posticobia ...
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Kaschner, K., Ready, JS, Agbayani, E., Kesner-Reyes, K., Rius-Barile, J., Eastwood, PD, South, AB, Kullander, SO, Rees, T., Watson, R., Pauly, D. and Froese, Rainer (2011) Using 'Aquamaps' for representing species distribution... more
Kaschner, K., Ready, JS, Agbayani, E., Kesner-Reyes, K., Rius-Barile, J., Eastwood, PD, South, AB, Kullander, SO, Rees, T., Watson, R., Pauly, D. and Froese, Rainer (2011) Using 'Aquamaps' for representing species distribution in Regional Seas The State of Biodiversity and Fisheries in Regional Seas. Fisheries Centre Research Reports, 19 . Fisheries Centre, University of British Columbia, Vancouver, BD, Canady, pp. 17-21.
Research Interests: Marine Ecology, Fisheries, Marine Conservation, Population Dynamics, Marine biodiversity, and 15 moreBiodiversity, Marine and Fisheries Policy, Trophic Ecology, Food webs, Biological Sciences, Overfishing, Food web, Animals, Trophic Level, Population Density, Conservation of Natural Resources, Indexation, Species Specificity, Food Chain, and Biological Model
We estimate biomass trends for demersal and large pelagic fishes,(ie, excluding small pelagic and mesopelagic fishes) based on 17 Ecopath models from Mauritania, Cape Verde, Senegal, the Gambia, Guinea, and Guinea-Bissau, Sierra Leone and... more
We estimate biomass trends for demersal and large pelagic fishes,(ie, excluding small pelagic and mesopelagic fishes) based on 17 Ecopath models from Mauritania, Cape Verde, Senegal, the Gambia, Guinea, and Guinea-Bissau, Sierra Leone and the open waters of the central east Atlantic, made to represent various time periods during the second half of the 20th Century. We use a published method developed for estimating fish biomass in the North Atlantic, and modify it to account for the specificity of West African fisheries ...
Research Interests: Management and High Seas
The impact that fishing operations may have on marine mammals and other components of marine ecosystems is a major concern today. Fisheries, in addition to causing by-catch mortalities, affect marine mammals through direct and indirect... more
The impact that fishing operations may have on marine mammals and other components of marine ecosystems is a major concern today. Fisheries, in addition to causing by-catch mortalities, affect marine mammals through direct and indirect competition for the same food sources. Our goal was to assess the potential trophic impact of fisheries on mammal populations in the North Atlantic by quantifying the overlap in resource exploitation in space and time using high-resolution modeling and mapping.