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Effects on phytoplankton growth of dissolved substances produced by fish farming ArchiMer
Arzul, Genevieve; Clement, Alejandro; Pinier, Anne.
Fish Farming enriches the water column in dissolved organic and inorganic material. These materials excreed by the fish, elutriate from uneaten food and derive from other polluting substances. Ratios of the organic/inorganic forms of substances (for example N and P) are thus modified. Such perturbations in turn affect phytoplankton development. From in vitro analyses and tests of water taken from a turbot rearing tank, we show the changes in seawater chemical composition produced as well as the way growth was modified in three phytoplankton species: the diatom, Chaetoceros gracile, and the dinoflagellates, Gymnodinium cf. nagasakiense and Alexandrium minutum. Elutriates from the granules used for feed (0.1 to 100 mg.l(-1)) were found to be stimulating,...
Tipo: Text Palavras-chave: Antibiotique; Fécès; Aliment; Aquaculture; Régulation de croissance; Phytoplancton; Urée; Antibiotic; Faeces; Feed; Fish farming; Growth regulation; Phytoplankton; Urea.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00188/29887/28340.pdf
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Sucrose application suppresses infection of the parasitic plant Orobanche ramosa in tomato (Lycopersicon esculentum) Agrociencia
González-Verdejo,Clara I.; Dita,Miguel A.; Nadal,Salvador; Moreno,M. Teresa; Román,Belen.
Orobanche ramosa is an achlorophyllous holoparasitic weed that causes devastating losses in many commercial crops. An experiment was made using sucrose to evaluate its effect on the early growth stages of the parasite. Although O. ramosa germination was not statistically affected by sucrose, the radicle length, the number of attachments sites and the nodules formed decreased significantly.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lycopersicon sculentum; Growth regulation; Parasitism; Sugar.
Ano: 2008 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952008000500003
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