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Registros recuperados: 27
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A dichotomous species of Codium (Bryopsidales, Chlorophyta) is colonizing northern Chile RChHN
GONZÁLEZ,ALEJANDRA; SANTELICES,BERNABÉ.
In late 2001 and early 2002, a dichotomous species of Codium appeared colonizing the low intertidal and shallow subtidal bottoms of Caldera Bay, northern Chile (27° 03’ S, 70° 51’ W). Due to the ecological and economic impact the species is having in Caldera Bay and its potential spread along the Chilean coastline, we studied the taxonomic identity of the species and examined its relationships with other dichotomous species of Codium reported for temperate Pacific South America. Morphological analyses suggest that the seaweeds from Caldera Bay belong to Codium fragile (Suringar) Hariot. Not only is there strong agreement in internal and external morphological characters, but among all the species reported for Peru and Chile, this is the only one exhibiting...
Tipo: Journal article Palavras-chave: Introduced species; Seaweed; Northern Chile.
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000200008
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Aménagement des pêcheries côtières de Nord-Bretagne, algues-crustacés ArchiMer
Arzel, Pierre.
Today, the seaweed industry's main products are the alginates and carraghenanes. The industrial network faces many problems. However, it remains prosperous since it ranks fifth in the world for alginate production and third for caraghenanes'. This stability which seems safe on a middle term standpoint must not conceal the crisis which previously hit Fucus' exploitation. Rightly so, being harvested until approximately 1950 for soil amendment purposes, coastal kelp (i.e. Fucus), was replaced by chemical fertilizers. Brittany's production which was reaching 180 000 cubic metre in the twenties, close to 200 000 tons of fresh kelp, would have become non existent if it had not been converted into seaweed meal for livestock feed. The market demand was then...
Tipo: Text Palavras-chave: Coastal fisheries development; North Brittany; Crustacean; Seaweed; Aménagement des pêcheries cotières; Nord Bretagne; Crustacé; Algue.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/rapport-1591.pdf
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Anti-inflammatory activity of the apolar extract from the seaweed Galaxaura marginata (Rhodophyta, Nemaliales) J. Venom. Anim. Toxins incl. Trop. Dis.
Rozas,E.; Freitas,J. C..
The red seaweed Galaxaura marginata (Ellis & Solander) Lamouroux, well known by the antibacterial activity of its polar extract and the cytotoxic activity of its oxygenated desmosterol, showed anti-inflammatory action in its apolar fraction. Topical anti-inflammatory activity was observed in samples collected at São Sebastião channel, northern littoral of São Paulo State, Brazil. The apolar extract and its fractions obtained through Thin-Layer Chromatography (TLC) reduced the topical inflammation produced by croton oil in mouse ear. Such data indicated that the apolar extract from the marine red alga G. marginata displayed anti-inflammatory activity (since 1mg/ear extract reduced 95±0.5% inflammation), which could be the result of the synergic...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Seaweed; Galaxaura marginata; Inflammation; Croton oil; Edema; Anti-inflammatory agents.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992007000200011
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Better off alone? Compared performance of monoclonal and polyclonal stands of a cultivated red alga growth ArchiMer
Usandizaga, Sara; Buschmann, Alejandro H.; Camus, Carolina; Kappes, José Luis; Arnaud-haond, Sophie; Mauger, Stéphane; Valero, Myriam; Guillemin, Marie Laure.
The objective of this study was to test, using a field experiment, the effect of genotypic diversity on productivity of farmed populations (Ancud and Chaica, Chile) of the domesticated red alga Agarophyton chilense (formerly known as Gracilaria chilensis), a species considered as economically important in Chile. Monoclonal and polyclonal (4 and 8 genotypes) subplots were outplanted into the mid intertidal in Metri Bay (Puerto Montt, Chile) during summer, a season in which A. chilense face higher temperatures (>18°C) and low nitrogen availability (<4.00 μmol). Ancud farm genotypes show higher growth rates in the monoclonal rather than the two polyclonal subplots. A similar tendency, yet not significant, was discernible in Chaica. In addition, whatever...
Tipo: Text Palavras-chave: Domestication; General‐purpose genotypes; Genotypic diversity; Productivity; Seaweed.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00605/71727/70197.pdf
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Capacity and scale inefficiency: Application of data envelopment analysis in the case of the french seaweed fleet ArchiMer
Guyader, Olivier; Daures, Fabienne.
Data Envelopment Analysis (DEA) models are applied to the main French seaweed fleet to examine capacity output, capacity utilization, and scale inefficiency. Coastal seaweed vessels target only one output - kelp - with the same gear but with different input level combinations. The fishery is seasonal and subject mainly to input regulations, especially a one trip per day regulation implemented in 1987. The consequence was a decline in total observed output and a fall in capacity output and efficient output. Only the largest vessels and a few small vessels harvesting without this regulatory constraint operate at the optimal scale. The question of a change in regulation, especially a shift to an individual quota system, is raised.
Tipo: Text Palavras-chave: Data Envelopment Analysis; Capacity; Capacity utilization; Scale in- efficiency; Production frontier; Seaweed; Fleet.
Ano: 2005 URL: https://archimer.ifremer.fr/doc/00243/35439/33968.pdf
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Chemotaxis and chemical defenses in seaweed susceptibility to herbivory BJB
PEREIRA,R. C.; DONATO,R.; TEIXEIRA,V. L.; CAVALCANTI,D. N..
Recent studies have show that small marine herbivores with limited mobility (mesograzers) often feed on macroalgae chemically defended against fishes or sea-urchins. In order to verify the involved mechanisms of chemotaxis or chemical defense into this process in Brazilian littoral, two species of brown alga Dictyota menstrualis and Dictyota mertensii were studied against the limited mobility herbivores, the amphipod Parhyale hawaiensis and the crab Pachygrapsus transversus. These two species were studied in order to verify the action of their crude extracts in the defense and chemotaxis processes related to limited mobility of these herbivores. Feeding preference assays revealed that P. hawaiensis do not eaten these Dictyota species. P. transversus do not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Seaweed; Chemical defense; Chemotaxis; Feeding.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300005
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Composite Guidelines for the Environmental Assessment of Coastal Aquaculture Development. Vol. 2 : Appendices OceanDocs
Shivappa, R.B.; Chowdhury, M.A.K.; Phillips, M.; Hambrey, J..
The farming of seaweed (Euchema spp.) began in the late 80’s, stimulated by government promotion and the active involvement of international corporations in promoting small-scale production. The industry grew rapidly in the early 90’s reaching 4,000 tonnes in 1995, but has since declined, related partly to marketing difficulties. There has been significant interest in shrimp farming for several years. Tanzania has good international trade routes, suitable climate, and a long coastline well suited to brackish-water pond production. To date the main interest has been in medium to large-scale projects with significant foreign interests. Environmental assessments have been carried out in respect of at least two proposed shrimp farm developments. The procedures...
Tipo: Report Palavras-chave: Seaweed; Coastal aquaculture; Environmental assessment.
Ano: 1999 URL: http://hdl.handle.net/1834/367
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Compte rendu des essais de pêche du Laminaria hyperborea ArchiMer
Arzel, Pierre; Mingant, Christian; Noel, Philippe; Gourronc, Eugene.
Introduction During the month of April 1994, the "Ressources Halieutiques de l'Ifremer" laboratory (Ifremer Halieutic Resources) in Brest tested tools to be used for the harvesting of Laminaria hyperborea as requested by Système Bio-Industries. The first results of this trial campaign are as follows: The tools are effective as far as interspecific as well as intraspecific selectivity. Rightly so, Laminaria hyperborea accounts for nearly 100% of the harvest. We also noticed that only large size plants are harvested, commercial harvest is satisfactory in terms of yield. However insufficiencies still remain. Comb efficiency is low, since the actual harvest only represents 10 to 12% of the stipes collected when the machine goes through. This low efficiency...
Tipo: Text Palavras-chave: Oceanographical campagne; Seaweed; Laminaria hyperborea; Fishing; Campagne océanographique; Algue; Laminaria hyperborea; Pêche.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/1996/rapport-1651.pdf
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Effect of biostimulant application and long-term storage on the nutritional value of carrot Horticultura Brasileira
Wszelaczyńska,Elżbieta; Szczepanek,Małgorzata; Pobereżny,Jarosław; Kazula,Maciej J.
ABSTRACT The nutritional value of carrot is determined by the content of total sugars and monosaccharides, carotenoids and vitamins, including vitamin C, in its roots. In 2009-2011, field experiments were carried out concerning the effect of biostimulating preparations applied during the carrot vegetation period on selected nutrients of its roots (total sugars, monosaccharides, carotenoids and vitamin C). Two biostimulants were foliarly applied in doses of 2 or 3 L ha-1 on various dates. Kelpak SL and Asahi SL: one, two or three applications; where, second and third applied at 2-week interval, additionally Kelpak SL: one application at 4-leaf phase, followed by additional application after 4 weeks. The field study was conducted in a randomized block design...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Daucus carota; Ecklonia maxima; Seaweed; Carotenoids; Vitamin C.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000400451
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Effect of sulfated polysaccharides from the Rodophyta Kappaphycus alvarezii in post larva of Nile tilapia (Oreochromis niloticus) submitted to a stress situation - doi: 10.4025/actascianimsci.v34i3.13213 Animal Sciences
Saboya, Jefferson Pablo de Sousa; Universidade Federal do Ceara; Araujo, Glacio Souza; Universidade Federal do Ceara; Silva, José William Alves da; Universidade Federal do Ceara; Sousa Junior, José de; Universidade Federal do Ceara; Maciel, Rafael Lustosa; Universidade Federal do Ceara; Farias, Wladimir Ronald Lobo; Universidade Federal do Ceara.
The study evaluated the effect of oral administration of sulfated polysaccharides (SP) extracted from the marine macroalga Kappaphycus alvarezii on survival and weight gain of Nile tilapia post larvae during sex reversal in a stress situation. SP were extracted from the seaweed by enzymatic digestion and incorporated into the diet before the addition of the hormone 17-α-methyltestosterone, and administered at the doses of 0.05, 0.1 and 0.2 mg g-1 of body weight and a control (without SP), for 28 days. In the last week of sex reversal a stress situation was established by removing the aeration and water renewal. Survival and weight gains data were subjected to a variance analysis (ANOVA) and Tukey's test for averages differentiation at significance levels...
Tipo: Analise laboratorial Palavras-chave: Seaweed; Immunostimulant; Sex reversal 5.06.00.00-1 alga marinha; Imunoestimulante; Reversão sexual.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/13213
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Galactans: an overview of their most important sourcing and applications as natural polysaccharides BABT
Delattre,Cedric; Fenoradosoa,Taratra Andrée; Michaud,Philippe.
Since last decades, lot of biological and rheological properties of polysaccharides and oligosaccharides were described. Among them, galactans and more especially sulfated galactans from seaweeds have shown interesting and specific properties not only as texturing agents but also as biological active compounds on several organisms. This class of polysaccharides includes classical sulfated galactans extracted from seaweeds and classified as agar and carrageenans. However, some galactans are more complex and their specific structural features have been characterized after their extraction from terrestrial plants, seaweeds but also animals and microoragnisms. This review catalogues the origins, structural characteristics and potentialities of these...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polysaccharide; Seaweed; Oligosaccharides; Galactan.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000600002
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L'algue japonaise Sargassum muticum (Yendo) fensholt. Caractéristiques et répartition ArchiMer
Loraine, Isabelle.
Sargassum muticum is a Japanese alga from the pheophycee class which has been introduced in Europe about fifteen years ago. It has greatly developed on account of its intrinsic characteristics (adaptation, growth speed, reproduction mode, etc...) and the favorable conditions it has encountered. The nuisance it generates can be very high but no efficient fighting solution has been found yet. Only mechanical means can be considered on a one off basis in areas where eradication is indispensable. Any development is faced with the problem of pick up costs. However the most interesting development for Sargassum muticum would be to utilize it as flocculent for suspended organic substances. Location updates for Sargassum muticum in France in 1989 did not show any...
Tipo: Text Palavras-chave: Teledetection; Seaweed; Sargassum muticum; Télédétection; Algue; Sargassum muticum.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/rapport-1656.pdf
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Les algues et invertebres marins des peches françaises. ArchiMer
Quero, Jean-claude.
This report is a prerequisite publication of a popular book, synthesizing and summarizing the main data on identification, names, biology and fishing aspects fo more than a hundred species of seaweeds and marine invertebrate.
Tipo: Text Palavras-chave: France; Marine invertebrate; Seaweed; France; Invertébré marin; Algue.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/rapport-1534.pdf
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Les algues et invertébrés marins des pêches françaises. 2e partie ArchiMer
Quero, Jean-claude.
This report is a prerequisite publication of a popular book, synthesizing and summarizing the main data on identification, names, biology and fishing aspects fo more than a hundred species of seaweeds and marine invertebrate.
Tipo: Text Palavras-chave: France; Marine invertebrate; Seaweed; France; Invertébré marin; Algue.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/rapport-1535.pdf
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Les algues et invertebres marins des peches françaises. 3e partie ArchiMer
Quero, Jean-claude.
This report is a prerequisite publication of a popular book, synthesizing and summarizing the main data on identification, names, biology and fishing aspects fo more than a hundred species of seaweeds and marine invertebrate
Tipo: Text Palavras-chave: France; Marine invertebrate; Seaweed; France; Invertébré marin; Algue.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/rapport-1536.pdf
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Marine Plants of Tanzania. A field guide to the seaweeds and seagrasses of Tanzania. OceanDocs
Oliveira, E.C.; Österlund, K.; Mtolera, M.S.P..
This is a book about the macroscopic marine plants of Tanzania, namely the seaweeds or benthic macroscopic algae and the seagrasses, that are marine flowering plants. Having flourished in the 19th century and the beginning of the 20th century, taxonomic studies then became less popular and the emphasis of biological investigations turned to other aspects of biology. However, after realising how important the conservation of biodiversity is, we are now experiencing a new interest in a more naturalistic approach to biology. But today this “romantic” approach is often fuelled by extensive bioprospection, the search of new drugs and gene conservation for use in transgenic organisms of commercial value. This in itself could justify the production of a new book...
Tipo: Book Palavras-chave: Marine plants; Seaweed; Seagrass.
Ano: 2003 URL: http://hdl.handle.net/1834/795
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Morphological variations of Gracilaria chilensis Bird, McLachlan et Oliveira, 1986 (Rhodophyta, Gracilariales) in the southeast Pacific Gayana
Edding,Mario; León,Cristina; Tala,Fadia.
The present work is a population morphometric study of Gracilaria from different environments along a latitudinal gradient of the Chilean coast that cover 1,500 km. Gracilaria species have been extensively exploited with an average extraction of 75,000 t per year. In Chile this seaweed is usually found in sandy bottom bays between Antofagasta (23º29'S - 70º25'W) and Chiloé (42º03'0''S - 73º11'0''W). Observations were made in 51 plants. Macroscopic observations were done in fresh plants, microscopic characters were determined in transversal sections with 20% Karo syrup and stained with aniline blue. Numerical analyses were performed by one-way ANOVA and Principal Component Analysis. The latter analysis was performed for those characters with significant...
Tipo: Journal article Palavras-chave: Gracilaria chilensis; Seaweed; Morphology; Chile.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000200009
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Nouvelles perspectives dans l'exploitation des laminaires ArchiMer
Braud, Jean-paul; Debroise, Reginald; Perez, René.
Tipo: Text Palavras-chave: Alginate; Demineralization; Exploitation; Seaweed; Laminaria.
Ano: 1977 URL: http://archimer.ifremer.fr/doc/1977/publication-1967.pdf
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Nymphicidal and Ovipositional Efficacy of Seaweed Sargassum tenerrimum (J. Agardh) against Dysdercus cingulatus (Fab.) (Pyrrhocoridae) Chilean J. Agric. Res.
Sahayaraj,Kitherian; Jeeva,Y. Mary.
We investigated the role of a brown seaweed alga, Sargassum tenerrimum (J. Agardh), against Dysdercus cingulatus (Fab.), which is an economically important cotton pest in many parts of Asia. Sargassum tenerrimum has been used as a source of fertilizers and drugs, but there is no information available in the literature about its use in ecofriendly pest management. The impact of benzene (BN), chloroform (CH), and a mixture of benzene and chloroform (BNCH) extracts, as well as two chromatographic fractions of BNCH (FR1 and FR2) were investigated for their insecticidal and ovipositional properties against D. cingulatus. The BE extract showed the best insecticidal activity (LC50 = 0.009%), higher than BNCH (LC50 = 0.021%) and CH extracts (LC50 = 0.2481%), and...
Tipo: Journal article Palavras-chave: Cotton pest; Nymphicidal; Ovipositional; Seaweed; Pest management.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100024
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Resources and Possibilities for Seaweed Exploitation in Madagascar OceanDocs
Razanakoto, I.; Mollion, J.; Ratsimba, A..
Gelidium madagascariense has been exploited for over 10 years in the Fort Dauphin area, SE Madagascar. The quality and quantity of the stocks were recently evaluated. Since 1992Eucheuma denticulatum and E. striatum cultivation is under experimentation in the Tuleararea, SW Madagascar. The results obtained show that this exploitation is economically viable.Large scale cultivation has not yet begun, as harvesting the wild stocks has become more and more popular among till' local population. To make Cultivation more attractive than wild stockharvesting, experimental strain selection of E. striatum' was initiated in 1992. After one year of selection on a small scale basis, two E striatum strains with an improved average daily growth rate (3.09 and 2.72%) could...
Tipo: Book Section Palavras-chave: Seaweed.
Ano: 1996 URL: http://hdl.handle.net/1834/493
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