The Aquatic Commons is a thematic digital repository covering the natural marine, estuarine /brackish and fresh water environments . It includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects.
Subject = Conservation
Mostrando recursos 1 - 20 de 990
A study of the crab pot as a fishing gear - Davis, Charles C.
The crab pot as a fishing gear was introduced in Maryland waters, following some years of greatly expanded use in Virginia, during the 1939 season, and was widely used during 1940. The 1941 session of the Maryland Legislature, however, illegalized the crab pot. Since that time the device has been given up almost entirely by Maryland fishermen, its attempted use in a commercial way having persisted in diminishing numbers in only one region of the state.
Report of the Workshop on Blue Crab Stock Dynamics in Chesapeake Bay, December 13-15, 1982, Chesapeake Biological Laboratory
This workshop was convened to begin building a foundation of understanding for developing and evaluating proposed measures for the rational management of the blue crab fishery in Chesapeake Bay. Our goal was to generate a summary of knowledge of blue crab stock dynamics. Specifically, we intended to address, and hoped to estimate, the basic parameters of an exploited stock - growth, mortality, natality, migration rates, sex ratios and abundance. In one sense these objectives were simply a means for organizing our discussions. A second objective was to compile at the workshop pertinent data held by the major research institutions on...
SAMUDRA Report No. 65, July 2013
Sticky issues - An update on the recent SSF guidelines, Forced into slavery- New Zealand, Grabbing oceans- MPAs fail to recognize human-rights issues, Getting rights wrong- GPO ignores the voices of SSF people, Smoking kilns- artisan fishers on the map, Depending on mangroves- Vietnam, Statement made at the GDF on work in fishing convention, fishy partnership- proposed GPO, Champion for fishers - Rolf Willmann
Yemaya, No.43, July 2013
South Africa- Shifting livelihoods, Viet Nam-Strengthening livelihoods, Chile - gains and challenges, Uganda- making changes possible, Maritza Mena from Costa Rica, Ground-breaking gender indicators, You tube resources
Breeding populations of seabirds in California, 1989-1991. Volume I - population estimates - Carter, Harry R.; McChesney, Gerard J.; Jaques, Deborah L.; Strong, Craig S.; Parker, Michael W.; Takekawa, Jean E.; Jory, Deborah L.; Whitworth, Darrell L.
In 1989-1991, the U.S. Fish and Wildlife Service surveyed breeding populations of seabirds on the entire California coast. This study was sponsored by the Minerals Management Service in relation to outer continental shelf oil and gas leasing. At 483 nesting sites (excluding terns and skimmers in southern California), we estimated 643,307 breeding birds of 21 seabird species including: 410 Fork-tailed Storm-petrel (Oceanodroma furcata); 12,551 Leach's Storm-petrel (O. leucorhoa); 7,209 Ashy Storm-petrel (O. homochroa); 274 Black Storm-petrel (O. melania); 11,916 Brown Pelican (Pelecanus occidentalis); 10,037 Double-crested Cormorant (Phalacrocorax auritus); 83,394 Brandt's Cormorant (P. penicillatus); 14,345 Pelagic Cormorant (P. pelagicus); 888 Black...
Monitoring report: sand dune reconstruction and restoration, at the Moss Landing Marine Laboratories
The Plan for Sand Dune Reconstruction and Restoration (and Biological Assessment) at Moss Landing Marine Laboratories (ABA Consultants, April 1, 1992) described reconstruction of dune contours and biological restoration with native dune plants to be carried out over the 8 acre site formerly occupied by the marine labs (prior to the Loma Prieta earthquake of October 1989). The plan called for annual reports in letter form which would present data on plant abundance, a short narrative description of changes on the site, progress towards recovery of the plant community, and assessment of progress based on restoration goals and further steps...
Estudio regional sobre las dimensiones sociales en el manejo de areas marinas protegidas: casos en Costa Rica, Nicaragua, Honduras y Panama - Rivera, Vivienne Solís; Borrás, Marvin Fonseca; Gallardo, Daniela Barguil; Ochoa, Mariela; Castañeda, Edgar; Castillo, Geodisio
Explora la percepción de las personas residentes en las comunidades costeras vinculadas a los espacios marinos protegidos en Honduras, Nicaragua, Costa Rica y Panamá. Profundiza, a partir de estudios de caso y el análisis comparativo, los temas de gobernanza, derechos humanos y distribución justa y equitativa de beneficios derivados de la conservación. Los resultados destacan que los esfuerzos de conservación marina no han logrado establecer puentes que permitan satisfacer las necesidades sociales. Las comunidades han sido excluidas de los procesos de toma de decisiones, y los costos de la conservación han recaído en las pueblos costeros. Se plantean recomendaciones orientadas...
Regional study on social dimensions of MPA practice in Central America: cases studies from Costa Rica, Nicaragua, Honduras and Panama
This research focuses on the social dimensions of marine conservation, and makes an assessment of the experiences of coastal and fi shing communities with regard to the governance of MPAs in Central America, based on case studies from Honduras, Nicaragua, Costa Rica and Panama. It examines the national contexts of the above countries in relation to the governance of MPAs. Furthermore, it analyzes the social impacts of MPAs on coastal communities by gathering the experiences and the voices of the communities and institutions involved, and reflects on how to build bridges in the search for forms and models of conservation...
Fishery-dependent livelihoods, conservation and sustainable use of biodiversity: the case of marine and coastal protected areas in India
The lacunae in fishing-community engagement in the management and governance of marine and coastal protected areas (MCPAs) were discussed in the 2009 Chennai Workshop organized by the International Collective in Support of Fishworkers (ICSF). To continue the discussion, a second, two-day workshop to review existing legal and institutional mechanisms for implemention and monitoring of MCPAs, titled ‘Fishery-dependent Livelihoods, Conservation and Sustainable Use of Biodiversity: The Case of Marine and Coastal Protected Areas in India’, was held in New Delhi during 1-2 March 2012.
The objective was to understand the impact of MCPAs on fishing communities, from an environmental-justice and human-rights perspective,...
Getting it right: incorporating social aspects into MPA planning and implementation
This brochure summarizes a series of case studies done in nine countries—Brazil, India, Indonesia, Mexico, Senegal, South Africa, Spain,Tanzania and Thailand—on the role of communities in the planning and implementation of marine protected areas (MPAs).
The studies demonstrate that communities can be powerful allies in efforts for conservation and management of coastal and marine resources. They also underline the need for systematic attention, capacity building, funding and other resources for effective implementation of Programme Element 2 on governance, participation, equity, and benefit sharing of the Programme of Work on Protected Areas (PoWPA) of the Convention on Biological Diversity (CBD).
A historical review of the shad fisheries of North America - Mansueti, Romeo; Kolb, Haven
A review of the relative productivity and value of the shad fisheries of North America as reflected in recorded commercial catches.
A review of reasons for the decline that are biological and socioeconomic.
Factors that have been held responsible are: pollution; destruction or impairment of spawning and nursery areas; overfishing; hydroelectric and canal dams; natural fluctuations in abundance. Natural catastrophes, parasites, and predators are not considered important in causing the decrease in commercial production. Attempts to rehabilitate the fisheries by various means of stocking artificially-reared fry and pond-reared fingerling shad, appear to have failed in every instance. Introduction of shad...
Habitat degradation - its nature, causes and treatment
Since the latter part of the 19th century the Ribble and its tributaries have suffered habitat degradation
to varying degrees. This report examims the causes for its degradation, specific problems and their treatment, progress, plans and procedures, and benefits of restoration including species identified by English Nature as threatened or declining and which are listed in the UK Biodiversity Action Plan.
Compatibilización del crecimiento orgánico, estructura poblacional y mortalidad: aplicación para el árbol tropical Otoba gracilipes - Del Valle Arango, Jorge Ignacio
Resumen: En este artículo se propone un método indirecto para deterninar tanto el coeficiente de mortalidad exponencial (l.) como la mortalidad anual (m) deduciéndolos matemáticamente de un modelo de crecimiento orgánico (von Bertalanffy) y de un modelo de estructura poblacional disctáneo (Licourt y Meyer) empleado en árboles• forestales, el cual relaciona la frecuencia de los individuos -por clase de tamaño. Las ecuaciones obtenidas permiten determinar A o m de manera discreta, instantánea o promedia entre dos edades cualesquiera t1 y t2. Se emplean ambos conceptos de morltaiidad a sendos cálculos de dvida media (t0,5) en función de A y m....
Fishes of the Mekong River: conservation and need for aquaculture - Nandeesha, M.C.
Conservation and the potential and need for aquaculture of three major fish (Catlocarpio siamensis, Probarbus spp. and Pangasius gigas) of the Mekong River are discussed. Different steps being undertaken by the Cambodian government in doing such activities are highlighted.
Down to earth thoughts on conserving aquatic genetic diversity - Pullin, R.S.V.
A discussion is presented on the topic of maintaining genetic diversity in aquatic ecosystems, considering the various threats caused by irreversible damage or loss to the environment. The current situation in aquaculture and future prospects regarding the conservation and protection of endangered species are outlined, describing the case of tilapias in Africa as one particular example of fish conservation.