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| Registros recuperados: 16 | |
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| Roberts, C.M.; Gell, F.R.. |
| Marine reserves are areas of the sea where fishing is not allowed. They provide refuges where populations of exploited species can recover and habitats modified by fishing can regenerate. In some places, closed areas have been used for fisheries management for centuries, and until recently natural refugia also existed, inaccessible through depth, distance or adverse conditions. Developments in technology have left few areas beyond the reach of fishing. Recently, the idea of marine reserves as fisheries management tools has re-emerged, developing from ecosystem management approaches, and observations of incidental fisheries benefits from reserves established for conservation. Marine reserves are predicted to benefit adjacent fisheries through two... |
| Tipo: Report |
Palavras-chave: Marine reserves. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/546 |
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| Grafton, R. Quentin; Kompas, Tom. |
| The northern cod fishery was once one of the world’s largest capture fisheries. Using data from the fishery, this research calculated the economic value of a marine reserve using a stochastic optimal control model with a jump-diffusion process. The analysis shows that, an optimal-sized marine reserve in this fishery would have prevented the fishery’s collapse and generated a triple payoff. Even if harvesting had been ‘optimal’ the profits from fishing would have been raised. The recovery time would also have decreased for the biomass to return to its former state and smoothed fishers’ harvests and profits. Following a negative shock, the chance of a catastrophic collapse would have been lowered. |
| Tipo: Report |
Palavras-chave: Marine reserves; Stochastic control; Fisheries; Environmental Economics and Policy; C61; Q22. |
| Ano: 2009 |
URL: http://purl.umn.edu/94822 |
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| Rodwell, L.D.; Roberts, C.M.. |
| Overexploitation of coral reefs causes species loss, stock collapses and habitat degradation and remains a major challenge for fisheries scientists and managers alike. To counter these, fully-protected marine reserves, areas closed to fishing and other harmful human activities represent an essential component of coral reef fisheries management. They overcome many of the management complexities of coral reefs, such as lack of data and enforcement, and provide vital opportunities for unhindered growth of fish stocks and protection of coral communities. Their role in conserving biodiversity and protecting habitat is undisputed. |
| Tipo: Report |
Palavras-chave: Coral reefs; Marine reserves. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/556 |
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| Boulanger, Emilie; Loiseau, Nicolas; Valentini, Alice; Arnal, Véronique; Boissery, Pierre; Dejean, Tony; Deter, Julie; Guellati, Nacim; Holon, Florian; Juhel, Jean-baptiste; Lenfant, Philippe; Manel, Stéphanie; Mouillot, David. |
| Although we are currently experiencing worldwide biodiversity loss, local species richness does not always decline under anthropogenic pressure. This conservation paradox may also apply in protected areas but has not yet received conclusive evidence in marine ecosystems. Here, we survey fish assemblages in six Mediterranean no-take reserves and their adjacent fishing grounds using environmental DNA (eDNA) while controlling for environmental conditions. We detect less fish species in marine reserves than in nearby fished areas. The paradoxical gradient in species richness is accompanied by a marked change in fish species composition under different managements. This dissimilarity is mainly driven by species that are often overlooked by classical visual... |
| Tipo: Text |
Palavras-chave: Environmental DNA metabarcoding; Marine reserves; Alpha and beta diversity. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00692/80374/83491.pdf |
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| Cinner, Joshua E.; Maire, Eva; Huchery, Cindy; Macneil, M. Aaron; Graham, Nicholas A. J.; Mora, Camilo; Barnes, Michele L.; Kittinger, John N.; Hicks, Christina C.; D'Agata, Stephanie; Hoey, Andrew S.; Gurney, Georgina G.; Feary, David A.; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham J.; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison; Hardt, Marah J.; Beger, Maria; Friedlander, Alan M.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Gough, Charlotte; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Pardede, Shinta; Mouillot, David. |
| Coral reefs provide ecosystem goods and services for millions of people in the tropics, but reef conditions are declining worldwide. Effective solutions to the crisis facing coral reefs depend in part on understanding the context under which different types of conservation benefits can be maximized. Our global analysis of nearly 1,800 tropical reefs reveals how the intensity of human impacts in the surrounding seascape, measured as a function of human population size and accessibility to reefs ("gravity"), diminishes the effectiveness of marine reserves at sustaining reef fish biomass and the presence of top predators, even where compliance with reserve rules is high. Critically, fish biomass in high-compliance marine reserves located where human impacts... |
| Tipo: Text |
Palavras-chave: Marine reserves; Fisheries; Coral reefs; Social-ecological; Socioeconomic. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00450/56115/68021.pdf |
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| Sanchirico, James N.; Cochran, Kathryn A.; Emerson, Peter M.. |
| This paper is a guide for citizens, scientists, resource managers, and policy makers, who are interested in understanding the economic and social value of marine protected areas (MPAs). We discuss the potential benefits and costs associated with MPAs as a means of illustrating the economic and social tradeoffs inherent in implementation decisions. In general, the effectiveness of a protected area depends on a complex set of interactions between biological, economic, and institutional factors. While MPAs might provide protection for critical habitats and cultural heritage sites and, in some cases, conserve biodiversity, as a tool to enhance fishery management their impact is less certain. The uncertainty stems from the fact that MPAs only treat the symptoms... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Marine protected areas; Marine reserves; Fisheries; Resource /Energy Economics and Policy; Q0; Q2. |
| Ano: 2002 |
URL: http://purl.umn.edu/10795 |
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| Sanchirico, James N.; Wilen, James E.. |
| This paper employs a spatial and intertemporal model of renewable resource exploitation to investigate the effects of marine reserve creation. The model combines the H. S. Gordon/Vernon Smith hypothesis of a rent dissipation process with Ricardian notions that resources are exploited across space in a pattern dependent upon relative profitabilities. The metapopulation model employed here incorporates modern biological ideas that stress patch heterogeneity, linkages, and dispersal processes between patches. The spatial bioeconomic model is then used to simulate the effects of reserve creation under various ecological structures. We find, under certain parameter configurations and ecological linkages, that there is potential for a "double-dividend" where... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Marine reserves; Spatial and intertemporal modeling; Bioeconomics; Resource /Energy Economics and Policy; C62; Q22; R10. |
| Ano: 1998 |
URL: http://purl.umn.edu/10715 |
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| Verhulst, Simon; Zoological Laboratory of the University of Groningen; s.verhulst@biol.rug.nl; Oosterbeek, Kees; ; kees.oosterbeek@wur.nl; Rutten, Anne L; ; anne.rutten@wur.nl; Ens, Bruno J; ALTERRA - Texel; bruno.ens@wur.nl. |
| Fisheries and other human activities pose a global threat to the marine environment. Marine protected areas (MPAs) are an emerging tool to cope with such threats. In the Dutch Wadden Sea, large MPAs (covering 31% of all intertidal flats) have been created to protect shellfish-eating birds and allow recovery of important habitats. Even though shellfish fishing is prohibited in these areas, populations of shellfish-eating birds in the Wadden Sea have declined sharply. The role of shellfish fisheries in these declines is hotly debated, therefore, we investigated the effectiveness of MPAs for protecting oystercatcher (Haematopus ostralegus) populations. Shellfish stocks (cockles, Cerastoderma edule) were substantially higher in the MPAs, but surprisingly this... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Buffy coat; Condition; Haematopus ostralegus; Hematocrit; Ideal free distribution; Marine reserves; Shellfish fishery. |
| Ano: 2004 |
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| Sanchirico, James N.; Wilen, James E.. |
| We utilize a spatial bioeconomic model to investigate the impacts of creating reserves on limited-entry fisheries. We find that reserve creation can produce win-win situations where aggregate biomass and the common license (lease) price increase. These situations arise in biological systems where dispersal processes are prevalent and the fishery prior to reserve creation is operating at effort levels in a neighborhood of open-access levels. We also illustrate that using strictly biological criteria for siting reserves (e.g., setting aside the most biological productive areas) will likely induce the most vociferous objections from the fishing industry. In general, we find that the dispersal rate and the degree the patches are connected play a significant... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Fisheries; Limited-entry; Marine reserves; Resource /Energy Economics and Policy; Q22; R10. |
| Ano: 2000 |
URL: http://purl.umn.edu/10487 |
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| Arrieta, Jesus M.; Arnaud-haond, Sophie; Duarte, Carlos M.. |
| The marine realm represents 70% of the surface of the biosphere and contains a rich variety of organisms, including more than 34 of the 36 living phyla, some of which are only found in the oceans. The number of marine species used by humans is growing at unprecedented rates, including the rapid domestication of marine species for aquaculture and the discovery of natural products and genes of medical and biotechnological interest in marine biota. The rapid growth in the human appropriation of marine genetic resources (MGRs), with over 18,000 natural products and 4,900 patents associated with genes of marine organisms, with the latter growing at 12% per year, demonstrates that the use of MGRs is no longer a vision but a growing source of biotechnological and... |
| Tipo: Text |
Palavras-chave: Marine protected areas; Marine reserves; Natural products; Gene patents; Law of the sea. |
| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00018/12897/9935.pdf |
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| Registros recuperados: 16 | |
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