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| Registros recuperados: 30 | |
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| 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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| 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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| 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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| 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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| 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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| 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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| Araújo, Rita; Vázquez Calderón, Fatima; Sánchez López, Javier; Azevedo, Isabel Costa; Bruhn, Annette; Fluch, Silvia; Garcia Tasende, Manuel; Ghaderiardakani, Fatemeh; Ilmjärv, Tanel; Laurans, Martial; Mac Monagail, Micheal; Mangini, Silvio; Peteiro, César; Rebours, Céline; Stefansson, Tryggvi; Ullmann, Jörg. |
| The EU Bioeconomy Strategy aims to support the sustainable growth and development of the EU bio-based sectors while creating jobs, innovation and services. Despite the recognized potential of the algae biomass value chain, significant knowledge gaps still exist regarding the dimension, capability, organization and structure of the algae production in Europe. This study presents and analyses the results of a comprehensive mapping and detailed characterization of the algae production at the European scale, encompassing macroalgae, microalgae, and the cyanobacteria Spirulina. This work mapped 447 algae and Spirulina production units spread between 23 countries, which represents an important addition to the reported number of algae producing countries. More... |
| Tipo: Text |
Palavras-chave: Blue growth; Seaweed; Bioeconomy; Biomass; Production; Algae. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00677/78923/81291.pdf |
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| 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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| 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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| 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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| 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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| 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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| Registros recuperados: 30 | |
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