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Showing 1 to 20 of 41 for “"Chlorophyta"”.
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Taxonomic and phylogenetic studies in the Cladophorophyceae (Chlorophyta)
… klasse van meercellige wieren behorende tot de Chlorophyta (groenwieren) en worden voornamelijk gekenmerkt door de coenocytische thallusbouw (thallus samengesteld uit meerkernige cellen). De klasse bevat een dertigtal genera en een driehondertal soorten die verspreid zijn van tropische tot …
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Purification and Properties of Triosephosphate Isomerase from Selected Chlorophyta
It is the purpose of this study to purify and investigate some of the properties of triosephosphate isomerase from two unicellular green algae 1 Ankistrodesmus Braunii and Scenedesmus acuminatus, and one filamentous green alga, Chara sp.
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Feed attractants in aquaculture - the chemical composition of aquacultured Ulva lacinulata (Chlorophyta)
For more than two decades, cultivation of the green seaweed Ulva lacinulata (Ulvales) has proven to be commercially viable and an integral part of the South African abalone aquaculture industry. This seaweed is not sold, but mainly used as feed for the abalone Haliotis midae (Lepetellida) and on …
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Taxonomy of Ulva species (Chlorophyta) in the South Western Cape, South Africa
Six species of Ulva, U. atroviridis Levring, U. capensis Areschoug, U. fasciata Delile, U. lactuca L., U. rigida C.Agardh and U. uncialis Kutzing, have been reported to occur in the south western Cape Province. As a result of herbarium, field and culture studies it was found that five of these …
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Variation in chemical components of aquacultured Ulva (Chlorophyta) in response to environmental variables
A detailed literature review of relevant Ulva biology and chemical composition is included. Marine algae are known to produce a wide range of volatile organic compounds that are primarily used in chemical communications. These compounds are released in seawater and act as either pheromones or …
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Biological and economical feasibility studies of using seaweeds Ulva lactuca (Chlorophyta) in recirculation systems in abalone farming
The aim of this study was to investigate whether a land-based recirculating seaweed-abalone integrated aquaculture system using Ulva lactuca was feasible as well as to test the differences between a commercial gravel bed recirculation system to an existing flow through system. These studies were …
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The molecular systematics of Ulva Linnaeus and Enteromorpha Link (Ulvales, Chlorophyta) from the South Western Cape, South Africa
Both Ulva and Enteromorpha are very common, ubiquitous, and environmentally important genera of green seaweeds. The evolutionary history of Ulva species is poorly understood, stemming from a lack of diagnostic, non-molecular systematic characters. This study addresses the following questions: i) Do …
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On the phylogenetic relationship of South African species of Cladophora (Chlorophyta) based on the 26S (LSU) gene region
In order to delineate the genus Cladophora in South Africa, several sites along the Cape peninsula were sampled and sequences for the partial26S region of the rRNA were obtained and a phylogram was constructed. The aims of this study were to provide a robust phylogenetic tree describing the …
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The cultivation of Ulva lactuca (chlorophyta) in an integrated aquaculture system, for the production of abalone feed and the bioremediation of aquaculture effluent
Significant effort has been put into the development of cost-effective abalone cultivation systems in South Africa, but the limited availability of suitable seaweed for abalone food is an obstacle to future development. The aim of this study was to investigate whether land-based integrated …
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The cultivation of Ulva lactuca (chlorophyta) in an integrated aquaculture system, for the production of abalone feed and the bioremediation of aquaculture effluent
Significant effort has been put into the development of cost-effective abalone cultivation systems in South Africa, but the limited availability of suitable seaweed for abalone food is an obstacle to future development. The aim of this study was to investigate whether land-based integrated …
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Diverzita zelených řas tvořících lišejníkové symbiotické interakce
… se věnuji jednotlivým rodům vývojové větve Chlorophyta ve třídách Ulvophyceae, Trebouxiophyceae a Chlorophyceae. Zabývám se fylogenetickou pozicí rodů, definuji jejich morfologii a zejména analyzuji jejich účast v lišejníkových symbiózách. Srovnávám poznatky založené na tradičních …
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Συμβολή στην έρευνα των πληθυσμών των βενθικών μακροφύκων (χλωροφύκων, φαιοφύκων και ροδοφύκων) του Θερμαϊκού Κόλπου
… BENTHIC PHYTOCOMMUNITIES WERE INVESTIGATED (CHLOROPHYTA, PHAEOPHYTA AND RHODOPHYTA) WHICH GROW TO DEPTHS OF 4 METERS. 121 TAXA WERE IDENTIFIED FROM WHICH24 BELONGED TO CHLOROPHYTA, 29 TO PHAEOPHYTA AND 68 TO RHODOPHYTA . THE RATIO R/P 2,25. THUS THE CHLORIDIC CHARACTER IS RATHER NORTHERN …
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Characterization of Ulva (Ulvaceae, Chlorophyta) species cultured in commercial abalone farms in South Africa, and comparison with closely related wild species, using morpho-anatomical and molecular methods
Seaweeds are among the five marine sub-sectors of species cultured in South Africa, with Ulva species cultured at a commercial scale. In South Africa, the annual production of Ulva is approximately 2000 tonnes (wet weight), with the majority of Ulva being grown in landbased paddle raceway systems …
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The eco-physiology of macroalgae from a temperate marine embayment in southern Australia
… decipiens Montague (Rhodophyta) and Ulva sp. (Chlorophyta) in response to a range of environmental regimes.
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Juvenile Green Turtle (chelonia Mydas) Foraging Ecology:feeding Selectivity And Forage Nutrient Analysis
… Juvenile green turtles selectively foraged on Chlorophyta and Rhodophyta. Results indicate that diet selection was based on nutritional content. Both the composite diet and the main diet item, Hypnea spp, had a higher gross energy value, were higher in protein, and lower in fiber than prey …
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Setting optimal diet ratios of kelp (Ecklonia maxima (Osbeck) Papenfuss) and formulated feed, and tests of a recirculating system using Ulva (Chlorophyta) as a biofilter, in South African abalone (Haliotis midae) cultivation
Land-based abalone aquaculture in South Africa, based on the local species Haliotis midae, started in the early 1990's and has grown rapidly in the last decade. This has led to numerous studies into various aspects of farming H midae. There are two aims of this study, (i) to test the relative …
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Diverzita, ekologie a ekofyziologie sněžných řas
… patří zelené řasy z řádu Chlamydomonadales (Chlorophyta), které jsou známé z polárních a horských oblastí celého světa. Tyto organizmy, které obsadily sněžné prostředí pravděpodobně až sekundárně, dokázaly vyvinout různé ekofyziologické adaptace nezbytné k úspěšnému přežití v extrémních …
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