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Registros recuperados: 3
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Assessment of types and abundance of live food for fish farming in Makoba Earthen ponds, Zanzibar, Tanzania OceanDocs
Kyewalyanga, M.S..
Surveys of naturally-occurring live food for fish in Makoba earthen ponds, Zanzibar were conducted from November 2001 to August 2002. This involved identification of dominant plankton in the water column as well as the composition of algal mats. The effect of nutrients on the composition and abundance of the organisms was also assessed. Protozoa were found to be the dominant zooplankton in the water column, followed by rotifers. The most abundant phytoplankton genera were Prorocentrum (13.4%), followed by Coscinodiscus (10.4%) and Diplopsalopsis (7.5%), while the benthic algal mats were dominated by cyanobacteria, mostly Spirulina (22%) and Oscillatoria (18.4%). To complement the surveys, a time-series experiment was conducted for 21 consecutive days to...
Tipo: Journal Contribution Palavras-chave: Prorocentrum; Coscinodiscus; Diplopsalopsis; Spirulina; Oscillatoria; Pyramimonas; Biddulphia; Microcystis Fish ponds Fishery management Phytoplankton Protozoan diseases Fish farms Fertilization (biological) Fish ponds Fishery management Phytoplankton http://aims.fao.org/aos/agrovoc/c_2929 http://aims.fao.org/aos/agrovoc/c_24026 http://aims.fao.org/aos/agrovoc/c_13344.
Ano: 2004 URL: http://hdl.handle.net/1834/1082
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Satellite and in situ observations of a late winter phytoplankton bloom, in the northern Bay of Biscay ArchiMer
Gohin, Francis; Lampert, Luis; Guillaud, Jean-francois; Herbland, Alain; Nezan, Elisabeth.
A phytoplankton bloom was observed in late winter 2000, on the continental shelf offshore of southern Brittany, in northwestern Bay of Biscay. This bloom appeared initially along the 120-m isobath, in stratified and clear waters, at the interface between the oceanic water and the plumes of southern Brittany rivers (mainly the Loire and Vilaine). The development of the bloom was triggered by favourable meteorological conditions, characterised by solar irradiance reaching the maximum level expected for that period of the year. Outside of the bloom area, the phytoplankton photosynthesis was irradiance limited: inshore, because of the stronger attenuation of the light; offshore, because of the weak stratification. The hydrological conditions at the onset of...
Tipo: Text Palavras-chave: Bay of Biscay; Coscinodiscus; Algal bloom; Phytoplankton; Ocean colour; Satellite sensing.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-463.pdf
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Scanning electron microscope studies on some species of the centric diatom genera <i>Thalassiosira</i> and <i>Coscinodiscus</i> OMA
Somers, D..
By means of a scanning electron microscope, the submicroscopic structure of four <i>Thalassiosira</i> species and two <i>Coscinodiscus</i> species is studied. Five of these taxa are more or less similar in the arrangement of the areoles; the sixth one is aberrant. Besides the description of each species and the description of the submicroscopic structure of the auxospore of <i>Thalassiosira nordenskiöldii</i>, a classification is given of the six taxa studied.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diatoms; Electron microscopy; Microscopy; Coscinodiscus; Thalassiosira.
Ano: 1972 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3457
Registros recuperados: 3
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