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| Hoch, T; Menesguen, Alain. |
| A general framework for an ecological model of the English Channel was described in the first of this pair of papers. In this study, it was used to investigate the sensitivity of the model to various factors: model structure, parameter values, boundary conditions and forcing variables. These sensitivity analyses show how important quota formulation for phytoplankton growth is, particularly for growth of dinoflagellates. They also stress the major influence of variables and parameters related to nitrogen. The role played by rivers and particularly the river Seine was investigated. Their influence on global English Channel phytoplanktonic production seems to be relatively low, even though nutrient inputs determine the intensity of blooms in the Bay of Seine.... |
| Tipo: Text |
Palavras-chave: English Channel; Sensitivity analyses; Ecological model. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00337/44791/44478.pdf |
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| Takahashi,Leonardo Susumu; Gonçalves,Flavio Daolio; Abreu,Janessa Sampaio de; Martins,Maria Inez Espagnoli Geraldo; Ferreira,Antonio Carlos Manduca. |
| Brazilian fish farms presented an accelerated development during the early 90's, mainly because of the increase in fee-fishing operations. To meet the demand of this market, fish production and supply became excessive and, as a consequence, the number of fee-fishing operations, farmers and the final selling price, decreased. This study analyzes the technical aspects, production cost, profitability and economic viability of the production of piauçu (L. macrocephalus) in ponds, based on information from a rural property. Feeding and fingerling costs amount to approximately 47.1% of the total production cost, representing together with the final selling price the most important factor affecting profitability. The payback period was 8.3 years, the liquid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Costs; Profitability; Economic analysis; Sensitivity analyses; Fish farming. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200017 |
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