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Selection of candidate fish species for farming in the bay of Guaratuba, Brazil BABT
Bouchereau,Jean-Luc; Chaves,Paulo T.; Albaret,Jean-Jacques.
An inventory of the maximum length (ML) reached by 57 species of fishes living in the mangrove of Guaratuba, Brazil, was undertaken with an aim to evaluate the relationship between the ecosystem and the size of individuals. For each of these species, the maximum length found in the region were compared with those available in existing literature. The majority of populations presented individuals whose length reached at least 40% than the known maximum length for the species, although only 19.3% were longer than 300mm in absolute value. Population of the other species were represented only by individuals either in their initial development phases, or reduced length as compared to the maximum length known elsewhere for the same species. In this mangrove,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Maximum length; Selection; Fish; Aquaculture; Mangrove.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000100003
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Modelling head loss along emitting pipes using dimensional analysis REA
Perboni,Acácio; Frizzone,Jose A.; Camargo,Antonio P. de; Pinto,Marinaldo F..
Local head losses must be considered in estimating properly the maximum length of drip irrigation laterals. The aim of this work was to develop a model based on dimensional analysis for calculating head loss along laterals accounting for in-line drippers. Several measurements were performed with 12 models of emitters to obtain the experimental data required for developing and assessing the model. Based on the Camargo & Sentelhas coefficient, the model presented an excellent result in terms of precision and accuracy on estimating head loss. The deviation between estimated and observed values of head loss increased according to the head loss and the maximum deviation reached 0.17 m. The maximum relative error was 33.75% and only 15% of the data set...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microirrigation; Lateral line; Maximum length.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300442
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