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Showing 1 to 20 of 30 for “"Rhodophyta"”.
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Molecular systematics of the genus Hypnea (Rhodophyta) in South Africa, with the description of a new genus, Tenebris (Cystocloniaceae, Rhodophyta)
Hypnea, an economically important genus of red algae (containing κ-carrageenan) found globally on tropical and subtropical shores, is shrouded in taxonomic confusion due to morphological plasticity of species and general lack of clear morphological characters. Of 113 species described worldwide …
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Systematics of the Gracilariaceae (Rhodophyta) of southern Africa
… for biodiversity studies. The Gracilariaceae (Rhodophyta) has emerged as one of the families that possess economic potential as a source of agar and as a potential feed for cultured abalone. A lack of knowledge concerning the taxonomic status of many members of this family is a concern. Gross …
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Systematics of the Laurencia complex (Rhodomelaceae, Rhodophyta) in southern Africa
… the red algal Laurencia complex (Rhodomelaceae, Rhodophyta) of South Africa were investigated, being generally poorly understood and taxonomically understudied. Prior to this study, ten currently recognised species in the Laurencia complex were recorded from South Africa: all were ascribed to the …
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Taxonomy and phylogeny of the South African Plocamium species Rhodophyta, Plocamiaceae
A number of taxonomic accounts have been produced for species of the red alga Plocamium in South Africa and the rest of the world; yet, the use of phylogenetic analyses to understand relationships within the genus has only been incorporated in the last decade in Japan and Europe. We used …
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ECOLOGY OF GRACILARIA TIKVAHIAE MCLACHLAN (GIGARTINALES, RHODOPHYTA) IN THE GREAT BAY ESTUARY, NEW HAMPSHIRE
<p>The reproductive phenology, growth and variation of chemical composition of Gracilaria tikvahiae from the Great Bay Estuary, N.H. were evaluated. A major objective was an analysis of the chemical composition, particularly agar content and properties, of plants separated into reproductive …
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Taxonomy and systematics of the Bangiales (Rhodophyta) in South Africa using an integrative approach
The Bangiales is a globally distributed red algal order that is best known for its economic value in the nori industry. The morphological simplicity of the Bangiales offers limited distinguishing characters for taxonomy and the order was therefore broadly classified into two genera based on …
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Population genetic studies of economically important Gracilaria and Gracilariopsis (Rhodophyta) in the south western Cape
Gracilaria (Rhodophyta) encompasses some of the world's most valuable agarophytes and has accordingly been the subject of much research in recent decades. Gracilaria, however, has presented a problem to taxonomists over the years in that extreme phenotypic variability in certain entities, and the …
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The systematics, biology and distribution of the Gelidiaceae (Rhodophyta) of South Africa and related taxa
… of the red algal family Gelidiaceae (Rhodophyta) of South Africa (and related taxa) were investigated, being relatively poorly understood and taxonomically problematic. Prior to this study, 21 species in 6 genera were reported from South Africa Now there are 29 species in 3 genera …
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Development in culture, ecophysiology and nutritional content of three South African Porphyra (Rhodophyta, Bangiales) species
The first aim of this study was therefore to study the reproductive biology and phenology of three common Porphyra species (Porphyra aeodis Griffin, Bolton et Anderson 1999, Porphyra capensis Katzing 1843 and Porphyra saldanhae Stegenga, Bolton et Anderson 1997), which occur on the west coast of …
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Evaluación bioecológica de Meridionella obtusangula (Rhodophyta) del Golfo San Matías y su valoración como fuente de ficocoloides
… obtusangula (Floridiophyceae, Gigartinales, Rhodophyta) una macroalga roja recientemente descubierta en el Golfo San Matías, Argentina. Incluye estudios que integran tanto aspectos básicos de su taxonomía, biología y ecología, como aplicados que resultaron en la obtención y caracterización de …
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A molecular and morphological investigation of the red seaweed genus Porphyra (Bangiales, Rhodophyta) in the northwest Atlantic
<p>To evaluate the possible occurrence of cryptic Porphyra taxa in the Northwest Atlantic, extensive field collections were made during winter and spring periods when relatively few previous collections had been made. Approximately 100 different sites extending from Chance Harbor, New Brunswick, …
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Measuring the growth of the articulated coralline red algae Corrallina officinalis and Arthrocardia corymbosa, (Corallinaceae, Rhodophyta) using a fluorescent brightener
Coralline algae are important components of the coastal marine ecosystem, making it crucial to understand influences on their production and their growth rate in general. A few attempts have been made to quantify coralline growth rate using various methods, however since they have been reported to …
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Συμβολή στην έρευνα των πληθυσμών των βενθικών μακροφύκων (χλωροφύκων, φαιοφύκων και ροδοφύκων) του Θερμαϊκού Κόλπου
… 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 MODERATE. THE RESEARCH ALSO …
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An investigation of genetic variation within northwest Atlantic Porphyra (Bangiales, Rhodophyta) with specific phylogeographic analysis of the common, rocky intertidal species, Porphyra umbilicalis
<p>To investigate the phylogeography of the rocky intertidal red alga, Porphyra umbilicalis Kutzing, a restriction fragment polymorphism assay (RFLP) of the ribulose bisphosphate carboxylase large subunit ( rbcL) was developed to accurately distinguish P. umbilicalis from the other morphologically …
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Experimental cultivation of the red seaweed, Gracilaria gracilis (Rhodophyta) in land-based tank culture systems on abalone farms in the Western Cape, South Africa
… red seaweed, Gracilaria gracilis (Gigartinales, Rhodophyta) in land-based culture systems was investigated in two Western Cape abalone farms i.e. Jacobsbaai Sea Products (JSP) and Irvin & Johnson (I&J) and large size culture tanks (I&J). All the tanks were stocked with at 2 kg m⁻² supplied with …
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The eco-physiology of macroalgae from a temperate marine embayment in southern Australia
… (Phaeophyta), Polysiphonia 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
… 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 items that were …
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