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| Cellina, F; De Leo, Ga; Rizzoli, Ae; Viaroli, P; Bartoli, M. |
| During the last 20, years, intensive mollusk farming has been developed in coastal waters, mostly in sheltered bays and lagoons. Often, mollusk stocks are threatened by frequent anoxic events from macroalgal blooms. Here, a decision support tool is described to select the optimal short-term strategy to control algal biomasses. Even though long-term and detailed studies of the lagoon systems are required to provide reliable, biologically based policies, we have here developed a simplified analysis that overlooks most of the ecological complexity, but explicitly includes environmental variability and uncertainty in parameter estimation in the economic assessment of the performances of different management strategies. The aim is to quickly screen management... |
| Tipo: Text |
Palavras-chave: Gestion d'une floraison macroalgale; Analyse bio-économique; Modélisation stochastique; Ulva rigida; Tapes philippinarum; Algal bloom management; Bioeconomic analysis; Stochastic modelling; Ulva rigida; Tapes philippinarum. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00322/43294/43030.pdf |
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| Koeshendrajana, Sonny; Cacho, Oscar J.. |
| The inland fishery in South Sumatra, Indonesia, is an important source of income, employment and protein to small-scale fishers. Some overall indicators, such as virtual disappearance of certain important species and continuous reduction in the size of harvested fish, indicate that the fishery is not being exploited on a sustainable basis. In this study, an evaluation of the status of the existing fish stock is undertaken, and an analytical model for identifying efficient levels of exploitation of the fishery is developed. Primary data are used to describe the current costs of fishing effort. Secondary data, combined with results of analysis of primary data, are then used to derive a supply function for the fishery. Different types of fishing gear are... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Smallholder fisheries; Bioeconomic analysis; Inland fisheries; Indonesia; Sumatra; Resource /Energy Economics and Policy. |
| Ano: 2001 |
URL: http://purl.umn.edu/12932 |
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| Mello,Renius; Resende,Flávio Dutra de; Queiroz,Augusto César de; Faria,Marcelo Henrique de; Oliveira,André Soares de; Siqueira,Gustavo Rezende. |
| The objective in this work was to evaluate the economicity of the finishing phase on feedlot of F1 Red Angus × Nellore (½ RA ½ N) and Blond D'Aquitaine × Nellore (½ BA ½ N) crossbred young bulls slaughtered at 480, 520 and 560 kg of body weight. Thirty-six F1 crossbred young bull with 20 months of initial average age: 18 ½RA½ N and 18 ½N½ BA were allotted to a completely randomized design in a 2 × 3 factorial arrangement (genetic group × slaughter weight), with six replicates. The ½ BA ½ N young bulls slaughtered at 480 kg had the highest carcass gain (kg/day), feed efficiency, gross income (R$/day), gross profit of feed (R$/day), break-even cost of the diet (@/t DM) and cost:benefit ratio. The ½ BA ½ N young bulls also had higher dressing percentage than... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Bioeconomic analysis; Economic feasibility; Profitability; Sensitivity analysis. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000100015 |
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