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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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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: http://archimer.ifremer.fr/doc/00243/35439/33968.pdf
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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 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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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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Sunscreen, antioxidant, and bactericide capacities of phlorotannins from the brown macroalga Halidrys siliquosa ArchiMer
Le Lann, Klervi; Surget, Gwladys; Couteau, Celine; Coiffard, Laurence; Cerantola, Stephane; Gaillard, Fanny; Larnicol, Maud; Zubia, Mayalen; Guerard, Fabienne; Poupart, Nathalie; Stiger-pouvreau, Valerie.
The present study focused on a brown macroalga (Halidrys siliquosa), with a particular emphasis on polyphenols and their associated biological activities. Two fractions were obtained by liquid/liquid purification from a crude hydroethanolic extract: (i) an ethyl acetate fraction and (ii) an aqueous fraction. Total phenolic contents and antioxidant activities of extract and both fractions were assessed by in vitro tests (Folin-Ciocalteu test, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, reducing power assay, superoxide anion scavenging assay, and beta-carotene-linoleic acid system). For the most active fraction, i.e., the ethyl acetate fraction, the oxygen radical absorbance capacity (ORAC) value, antibacterial activities, and sunscreen...
Tipo: Text Palavras-chave: Antioxidant; Bactericidal; Phenolic compounds; Phaeophyceae; Seaweed; ORAC value; Sunscreen potential.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00366/47682/47970.pdf
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Technique de culture pour les cotes bretonnes de l'algue alimentaire Undaria pinnatifida. Tableau de marché - étude économique ArchiMer
Perez, René; Kaas, Raymond; Barbaroux, Olivier; Arbault, Suzanne; Le Bayon, Nicolas; Moigne, J.
Introduction Starting in 1986, the ANVAR contributed well appreciated financial support in order to set up an original seeding technique characterized by artificial seeding production in a laboratory. This advantageous new way of seeding, i.e. independency from nature, yield increase and true competitiveness compared to traditional methods, nevertheless requires strict adherence to a procedure progressively elaborated during numerous trials in laboratory as well as at sea. The program ended in July 1989 after testing the cultivation protocol on a 2 hectare exploitation scale, in order to better detect what could be improved to greatly increase productivity, facilitate the work of the harvester and to better adapt the operating mode to environmental...
Tipo: Text Palavras-chave: Economic survey; Brittany; Farming technique; Seaweed; Undaria pinnatifida; Etude économique; Bretagne; Technique de culture; Algue; Undaria pinnatifida.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/rapport-1659.pdf
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Ultrasound-assisted extraction of R-phycoerythrin from Grateloupia turuturu with and without enzyme addition ArchiMer
Le Guillard, Cecile; Dumay, Justine; Donnay-moreno, Claire; Bruzac, Sandrine; Ragon, Jean-yves; Fleurence, Joel; Berge, Jean-pascal.
The aim of this study was to compare two processes for the extraction of R-phycoerythrin (R-PE) from the red seaweed Grateloupia turuturu: ultrasound-assisted extraction (UAE) and ultrasound-assisted enzymatic hydrolysis (UAEH). Process efficiencies were both evaluated by the yield of R-PE extraction and by the level of liquefaction. Experiments were conducted at 40 and 22 °C, for 6 h, using an enzymatic cocktail and an original ultrasonic flow-through reactor. R-PE appeared very sensitive to temperature, thus 22 °C is strongly recommended for its extraction by UAEH or UAE. However, the higher processing temperature (40 °C) clearly increased the extraction of water-soluble compounds (up to 91% of liquefaction). These two new processes are thus promising...
Tipo: Text Palavras-chave: Seaweed; Grateloupia turuturu; R-phycoerythrin; Ultrasound-assisted extraction; Ultrasound-assisted enzymatic hydrolysis; Liquefaction.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00292/40332/39993.pdf
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Valorisation des algues et autres végétaux aquatiques ArchiMer
Delepine, René; Gaillard, René; Morand, Philippe.
This volume about "Valorisation des algues et autres végétaux aquatiques" is being published when studies are developping on natural environment protection and economical management for water and aquatic resources. It should help in setting up development strategies for exploitation of seaweeds as well as freshwater plants. This work is helpful to many readers and more particularly to : researchers, industrials, responsibles of research units or technical associations, teachers of various academic levels, all classes of dec is ion-makers, students. It will give them food for thought and bring many references about people already committed in these fields.
Tipo: Text Palavras-chave: Economy; Exploitation; Fresh water plants; Seaweed; Economie; Exploitation; Végétaux d'eau douce; Algue.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/1988/rapport-1666.pdf
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Weed Management, Folic Acid and Seaweed Extract Effects on Faba Bean Plants and Associated Weeds under Sandy Soil Conditions CIGR Journal
Dawood, Mona Gergis.
Two field experiments were conducted during the winter seasons of 2014/2015 and 2015/2016 at the agricultural experimental station of the National Research Centre, Nubaria, Egypt. Field evaluation of the efficiency of weed-control treatments (unweeded, oxadiargyl, metribuzin and two hand hoeing) and  bio-stimulants levels (folic acid at the rate of 10, 20 and 30 mg/L, and seaweed extract 100, 200 and 300 mg/L) and their interactive effects on faba bean growth, yield, yield attributes and chemical composition of seeds. Two hand hoeing achieved the highest weed depression expressed in the lowest dry matter of broadleaved, narrow-leaved and total weeds. Also, two hand hoeing was the most superior treatment in increasing plant height, shoot dry weight, leaf...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicides; Seed yield; Folic acid; Seaweed; Vicia faba; Nutritive value.
Ano: 2018 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4376
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