Consulta: subjectFacets:"Food chains"
Registros recuperados: 11
Data/hora: 16/06/2024 15:45:11

Les chaines alimentaires naturelles et l'aquaculture
Provedor de dados: 5
Autores: Barnabe, G.
Aquaculture sets up manipulation of natural food chains. This paper describes some utilizations of photosynthetic bacteria, phytoplankton and zooplankton taken out sewage ponds, wetlands or neritic waters.
Tipo: Text
Palavras-chave: Bacteria; Photosynthesis; Aquaculture; Ecosystems; Zooplankton; Phytoplankton; Food chains.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1254.pdf

Aquatic food webs in mangrove and seagrass habitats of Centla Wetland, a Biosphere Reserve in Southeastern Mexico
Provedor de dados: 83
Autores: Mendoza-Carranza,Manuel; Hoeinghaus,David J; Garcia,Alexandre M; Romero-Rodriguez,Ángel.
Mangrove and seagrass habitats are important components of tropical coastal zones worldwide, and are conspicuous habitats of Centla Wetland Biosphere Reserve (CWBR) in Tabasco, Mexico. In this study, we examine food webs in mangrove- and seagrass-dominated habitats of CWBR using stable isotope ratios of carbon and nitrogen. Our objective was to identify the importance of carbon derived from mangroves and seagrasses to secondary production of aquatic consumers in this poorly studied conservation area. Carbon and nitrogen isotope ratios of basal sources and aquatic consumers indicated that the species-rich food webs of both habitats are dependent on riparian production sources. The abundant Red mangrove Rhizophora mangle appears to be a primary source of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon flow; Food chains; Neotropical; Rizophora mangle; Submerged aquatic vegetation; Vallisneria americana.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000100020

Distribución, áreas de concentración y estructura de la población del bacalao austral (Salilota australis, Gunther 1887)del Atlántico Sudoccidental
Provedor de dados: 20
Autores: Perez Comas, J.A.
The "bacalao austral" is a typical fish from the cold water of the Southwest Atlantic and the Southeastern Pacific oceans, whose fishery has not yet developed. In this work, the structure of the concentration areas of summer and winter distribution and other biological items were analyzed, basing on data provening from R/V"Walther Herwig" and R/V"Shinkai Maru", which operated in these waters during 1978/79/. The trophic vertical migrations are common in this species.
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Size distribution; Sexual maturity; Feeding; Food chains; Length-weight relationships; Population density; Ecological distribution; Vertical migrations; Cod fisheries; Geographical distribution; Feeding; Food chains; Sexual maturity; Population density; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_3014; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1980
URL: http://hdl.handle.net/1834/2060

Aspectos biológico-pesqueros del abadejo (Genypterus blacodes)
Provedor de dados: 20
Autores: Renzi, M.A.
The kingklip is one of the species that has been traditionally exploited in the Argentine Sea. Although captures were not very important, they have been increased in the last years. In this paper, the structure of the concentration areas of summer, spring and winter distribution and other biological aspects were analyzed, on the basis of the data collected during cruises carried out by R/V"Walther Herwig" and R/V"Shinkai Maru" in Argentine waters during 1978/79. The trophic spectrum of the kingklip comprises mainly food species of the Classes Pisces and Crustacea as well as other complementary groups like Mollusca, Brachiopoda and haliacea.
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Population structure; Size distribution; Feeding; Length-weight relationships; Food chains; Trophic relationships; Geographical distribution; Population structure; Feeding; Food chains; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_3014.
Ano: 1986
URL: http://hdl.handle.net/1834/2027

The life cycle of &lt;i&gt;Anguillicola crassus&lt;/i&gt;
Provedor de dados: 27
Autores: De Charleroy, D.; Grisez, L.; Thomas, K.; Belpaire, C.; Ollevier, F.P.
For some years now the parasitic swim bladder nematode &lt;i&gt;Anguillicola crassus&lt;/i&gt; of the European eel &lt;i&gt;Anguilla anguilla&lt;/i&gt; L., has been reported from several European countries. The entire life history of this parasite has recently been elucidated in our laboratory. Young larvae leave the swim bladder of the host via the pneumatic duct and reach the water through the digestive tract. They are ingested by small copepods (Cyclopoida), which act as intermediate hosts. Larvae remain in the hemocoel until the copepods are eaten by the final host, the European eel. Larvae penetrate through the intestinal wall and reach the swim bladder where they develop into adults. When infected copepods are eaten by other small fish, such as carp...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological vectors; Disease transmission; Fish diseases; Food chains; Freshwater fish; Hosts; Life cycle; Parasites; Parasitic diseases; Predation; Predators; Swim bladder; Anguillicola crassus.
Ano: 1990
URL: http://www.vliz.be/imisdocs/publications/3074.pdf

Live-food mediated drug delivery as a tool for disease treatment in larviculture: the enrichment of therapeutics in rotifers and &lt;i&gt;Artemia&lt;/i&gt; nauplii
Provedor de dados: 27
Autores: Verpraet, R.; Chair, M.; Léger, P.; Nelis, H.; Sorgeloos, P.; De Leenheer, A.P.
The live food enrichment technique using emulsions for nutritional deficiencies in rotifers and &lt;i&gt;Artemia&lt;/i&gt; was further investigated as a tool for transferring therapeutics through the food chain. &lt;i&gt;Artemia&lt;/i&gt; nauplii and the rotifer &lt;i&gt;Brachionus plicatilis&lt;/i&gt; were enriched with a self-emulsifying concentrate in which the therapeutic mixture trimetoprim: sulfamethoxazole was incorporated. An analytical method and protocol for the quantification of trimethoprim and sulfamethoxazole in a heterogeneous biological matrix, such as &lt;i&gt;Artemia&lt;/i&gt; , was developed using High Performance Liquid Chromatography. When applying a 24h enrichment period, the accumulation of both drugs in &lt;i&gt;Artemia&lt;/i&gt;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture systems; Disease control; Drugs; Food chains; Therapy; Artemia.
Ano: 1992
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2894

Het Schelde-estuarium als filter: een bioreactor van stofstromen
Provedor de dados: 27
Autores: Van Damme, S.; Meire, P.
The Scheldt estuary is exposed to large loads of carbon and nutrients. This leads to a eutrophication problem characterized by reduced oxygen concentrations and a huge efflux of CO&lt;sub&gt;2&lt;/sub&gt;. In the coastal waters a degradation of the foodchain is noted caused by excessive nutrient supply. The capacity of the estuary to polish the water is important but can not cope with the vast scale of the immissions. Restoration and development of tidal wetlands can contribute in several ways to restore the water quality. Increase of water treatment is expected to have positive ecological results. Nevertheless, restoration of the oxygen conditions might counteract some purifying processes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Degradation; Estuaries; Eutrophication; Food chains; Nutrients (mineral); Water quality.
Ano: 2001
URL: http://www.vliz.be/imisdocs/publications/280697.pdf

Transparency in Food: A Challenge for Research and Sector Initiatives
Provedor de dados: 31
Autores: Schiefer,   Gerhard.
Transparency in the Food Sector and especially towards consumers is an issue which receives increasingly attention in public and research. There is widespread agreement that the present state of transparency is not sufficient and needs engagement by research and the sector to move forward. A Strategic Research Agenda on Transparency (SRA) identifies opportunities and challenges for research to contribute to improvements in transparency supporting consumers’ trust in food and the society’s interest in food that is safe and considers the evolving environmental and social concerns
Tipo: Article
Palavras-chave: Transparency; Food chains; Research; Agribusiness; Food Consumption/Nutrition/Food Safety; Food Security and Poverty.
Ano: 2011
URL: http://purl.umn.edu/121851

An Empirical Analysis of the Determinants of Success of Food and Agribusiness E-Commerce Firms
Provedor de dados: 31
Autores: Montealegre,   Fernando; Thompson,   Sarahelen R.; Eales,   James S.
E-commerce's value creation in agricultural and food markets will only occur to the extent that e-commerce firms exist throughout the supply chain. The problem is that e-commerce firms throughout the agricultural and food supply chain have faced a serious challenge in staying in business. Many have been forced to exit the market, and only a few have survived to develop into functional web-based businesses. The objective of this research study is to identify characteristics that are associated with successful e-commerce firms throughout the agricultural and food supply chain. Relevant e-commerce and agricultural e-commerce literature suggests several characteristics that influence the success for agricultural and food e-commerce firms. A limited-dependent...
Tipo: Journal Article
Palavras-chave: E-commerce; Food chains; Survival probability; Logistical regression; Agribusiness.
Ano: 2007
URL: http://purl.umn.edu/8168

Impacts of Geographical Indications - Review of Methods and Empirical Evidences
Provedor de dados: 31
Autores: Barjolle,   Dominique; Paus,   Marguerite; Perret,   Anna O.
This paper focuses on methods for assessing the territorial impact (economic, social and environmental) of geographical indication systems. First, in a review of methods, methodological difficulties and choices are discussed and major studies are briefly presented. We highlight that it is necessary to identify a clear reference point and a relevant set of indicators and that this question has led to an active and rich research corpus. In a second part, we present some of the results of a recent European research program, SINER-GI. We analyze the impacts of 14 case studies in a common methodology. The results show significant differences of the priorities of the stakeholders between established geographical indications and geographical indications in...
Tipo: Conference Paper or Presentation
Palavras-chave: Geographical Indications; Territorial impact; Food chains; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Research Methods/ Statistical Methods; O34; Q13; R58.
Ano: 2009
URL: http://purl.umn.edu/51737

Short food supply chain: characteristics of a family farm
Provedor de dados: 65
Autores: Aguiar,Luane da Conceição; DelGrossi,Mauro Eduardo; Thomé¹,Karim Marini.
ABSTRACT: Short Food Supply Chains (SFSCs) provide a dependable substitute for conventional supply chains, as their food reflects the characteristics of “local”, “natural”, “healthy” and “reliable”. For the family farmer, the short chains constitute anexcellent way of diversifying their produce, gaining higher added value and thus warranting steadier revenues. This paper thus aims to discern the distinguishing features that the short chains offer, in general, to the family farm. To accomplish this, a literature review was performed to study the works done and approaches conducted on the short chains in the academy, in terms of family farm, and identify their specifications. Positive characteristics related to family farmers were recognizable in comparison...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Short chains; Short circuits; Food chains; Family farm.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000500800