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A comparative study of techniques for modeling the spatiotemporal distribution of heat and moisture fluxes at different agroecosystems in Brazil. Repositório Alice
TEIXEIRA, A. H. de C.; HERNANDEZ, F. B. T.; LOPES, H. L.; SCHERER-WARREN, M; BASSOI, L. H..
As a result, this chapter is structured as follows: following the introduction, the study region, datasets, and the steps for modeling are described; one of the first comparisons between SAFER and SEBAL is then made available, comparing estimates by these two modeling approaches against corresponding estimates by the traditional FAO methodology; next, results from case studies are furnished, covering application of both SAFER and SEBAL methods with satellite images, in some irrigation crops and natural vegetation at different spatial and temporal scales in the Brazilian semiarid region.
Tipo: Capítulo em livro científico (ALICE) Palavras-chave: Agroecossistema; Floxo de calor; Umidade do solo; Balanço de energia; Recurso natural; Sensoriamento remoto; Energy budget; Remote sensing; Soil moisture.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/972949
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Bilan énergétique chez les mollusques bivalves : terminologie et méthodologie - Compte rendu du groupe de travail réuni au laboratoire national "Ecosystème conchylicole" de l'IFREMER La Tremblade (13 et 14 septembre 1984) ArchiMer
Heral, Maurice; Lucas, Albert; Deslous Paoli, Jean-marc; Goulletquer, Philippe; Masse, Henri; LABEIM (Laboratoire de Biologie et d'Ecologie des Invertébrés Marins).
En septembre 1984, MM. HERAL et DESLOUS-PAOLI organisèrent à La Tremblade, une "réunion méthodologie expérimentale mollusques". Cette rencontre faisait suite à un bref état qui s'était engagé au Congrès de Montpellier sur les "Bases biologiques de l'Aquaculture", où il était apparu que la terminologie et la méthodologie concernant le métabolisme des bivalves devaient être clarifiées. Grâce à une large information auprès des spécialistes français de la physiologie des bivalves, la réunion à La Tremblade a réuni un grand nombre de participants très motivés. Pendant 2 jours des discussions très animées ont permis de bien comprendre les échanges entre les bivalves et leur environnement et d'y jeter un regard neuf, ce qui impliquait une analyse critique du...
Tipo: Text Palavras-chave: Terminologie; Méthodologie; Bilan d'énergie; Physiologie; Bivalve; Terminology; Methodology; Energy budget; Physiology; Bivalve molluscs.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00014/12562/9432.pdf
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Bilan energetique d'une population naturelle de Crepidula fornicata dans le bassin de Marennes-Oleron ArchiMer
Deslous-paoli, Jean-marc; Heral, Maurice; Masse, H.
An energy budget has been evaluated for a natural population of Crepidula fornicata living at low water of spring tides in the oyster farming basin of Marennes-Oleron. This budget of production was estimated according to the position along the chain. The average biomass for an individual representative of the population was equivalent to 1.87 Kjoules, and the annual consumption C was 20.08 Kjoules/year. The energy budget expressed in percent of energy consummates was: C = Pg + Pr + Ps + R + F; 100 = 4.6 + 1.6 + 0.8 + 48 + 45. This budget is compared with literature data on other herbivorous gastropods and with those calculated for Crassostrea gigas in the same locality.
Tipo: Text Palavras-chave: Bivalvia; Crepidula fornicata; Seasonal variations; Population structure; Energy budget; Bassin de Marennes Oléron; Bilan énergétique; Crepidula fornicata.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1181.pdf
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Biochemical substrates expenses and respiration at short-term starvation of marine planktonic animals ArchiMer
Pavlova, Z; Morozova, A; Gaudy, R; Shchepkin, V.
One of the most important indices at estimation of productivity characteristics of hydrobionts is oxygen consumed in the process of respiration. Usually respiration (standard metabolism) is measured in small-volume respirometres (30-50 ml) where animals' activity is considerably restricted. It may underestimate respiration in comparison to natural one. Therefore respirometres of larger volume were used. Simultaneously under same conditions we tried to estimate energy requirements by expense of main biochemical components of organic matter (lipids, protein, glycogen). Results were used to calculate energy budget and to compare energy expenditures, measured according to consumed oxygen and tissue substrates expense.
Tipo: Text Palavras-chave: Euchirella curticauda; Pleuromamma abdominalis; Scolecithrix danae; Ostracoda; Copepoda; Starvation; Oxygen consumption; Biochemical composition; Zooplankton; Energy budget; Respiration; Biological production.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1520.pdf
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Bioenergética del besugo Pagrus pagrus. OceanDocs
Aristizabal, E.O..
The utilization of the energy of food by red porgy (Pagrus pagrus Linnaeus, 1758) from the Argentine Sea (SW Atlantic) was studied. From the energetic point of view, it is proposed that the strategy of patitioning, utilization and storage of the energy of food, is an indicator of the organism response to the environmental conditions. The main objective was to know the proportion of the energy of food derived to the different components of the bioenergetics budget. In order to estimate the monthly energy investment in reproductive growth, chemical analysis of gonads from fishes caught by the fishery fleet and from laboratory studies were performed. Two indexes were used to calculate the energy investment in female ovaries: the proportion of net daily energy...
Tipo: Theses and Dissertations Palavras-chave: Fish culture; Bioenergetics; Eggs; Fish larvae; Food consumption; Energy budget; Metabolism; Oxygen consumption; Fish culture; Eggs; Food consumption; Metabolism; Fish larvae; Oxygen consumption; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_4769; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5478.
Ano: 2003 URL: http://hdl.handle.net/1834/1466
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Croissance, production et demande d'énergie d'une population de soles (Solea vulgaris) introduite dans une lagune aménagée (bassin d'Arcachon) ArchiMer
Lasserre, G.; Lasserre, P..
Population of 4000 soles received from an induced spawing (COB-BREST), with a mean weight o£ 54 mg were introduced into a man modified lagoon (1000 m2 ) at Certes (4 soles/m2 ). The experiment was continued until December 1977 and permitted an analysis of the demographic evolution of the population : structure number, biomass, growth, production. Simultaneously an estimate of the trophic support necessary for the population derived by correlating oxydative demands with rate of oxygen consumption, was determined experimentally with specimens obtained during the samplings for growth and production (19 VII, 14 IX, 24 XI, 20 XII 1977). 1°) The demographic evolution of the population shows a rapid growth and a strong spread in size. For the short duration of...
Tipo: Text Palavras-chave: Lagunes côtières exploitées; Bassin d'Arcachon; Sole Solea vulgaris; Aquaculture intensive; Production; Budget énergétique; Energie potentielle trophique.; Exploited coastal lagoons; Arcachon Basin; Sole; Solea vulgaris; Intensive aquaculture; Production; Energy budget; Trophic energy potential..
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41687/40896.pdf
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Development of shellfish production models ArchiMer
Bacher, Cedric.
Mathematical models for biological processes are presented as a set of tools for research, which ilave been created for specifie tasks impact studies, energy budget, test of hypothesis. Before using it, the mecanisms involved must be analysed, depending upon wether a whole ecosystem or one animal is studied (biological scale), physical conditions are taken into account (physical scale), with a predetermined scale for time. The no general method for analysis can be, as conditions of studies are so different, but sorne typical cases can show the approach of the modelizer and the recent developments of its tools.
Tipo: Text Palavras-chave: Shellfish; Test of hypothesis; Energy budget; Impact studies; Mathematical models; Conchyliculture; Validation hypothèse; Bilan énergétique; Etude d'impact; Modélisation.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-6220.PDF
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Ecophysiologie de l'huître creuse Crassostrea gigas (Thunberg) : analyse bioénergétique de la gamétogenèse sous trois conditions trophiques distinctes ArchiMer
Bourles, Yves.
The Pacific oyster (Crassostrea gigas) is a major cultivated shellfish resource in France, which represented a tumover of 220 millions € in 2000. Mass mortalities among this commercially important bivalve species are known in France since about 40 years, but have become a recun'ing obstacle for growers of oysters and a threaten for commercial production along the French Atlantic coast in the last 20 years. Since 2000, IFREMER is canying out a multidisciplinary program, MOREST, ta understand the problem of summer mortality, and possibly ta solve il. As part of the MOREST program, the present study focuses on the relationship between gametogenesis, metabo lism and mortality of 7-month, i.e. juvenil e, C. gigas. In April 2004, a total of 2250 oysters were...
Tipo: Text Palavras-chave: Crassostrea gigas; Naissain; Mortalité estivale; Gamétogenèse; Bilan énergétique; Crassostrea gigas; Spot; Summer mortalities; Gametogenesis; Energy budget.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/00448/55961/57444.pdf
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Feed intake, molt frequency, tissue growth, feed efficiency and energy budget during a molt cycle of mud crab juveniles, Scylla serrata (Forskål, 1775), fed on different practical diets with graded levels of soy protein concentrate as main source of protein ArchiMer
Nguyen, Ngoc Thi Bich; Chim, Liet; Lemaire, Pierrette; Wantiez, Laurent.
There has been growing interest in the development of mud crab aquaculture in New Caledonia. However, for this to become established at a commercial level, a cost-effective formulated feed based on internationally-available ingredients needs to be developed. We have evaluated the optimal dietary protein content for juvenile crabs, Scylla serrata (Forskål, 1775), using a series of diets with a protein content ranging from 27 to 49% and soy protein concentrate (SPC) as the main protein source. For this purpose, 54 individually housed crabs were allocated to five dietary treatments (n = 10 or 11). The crabs were fed ad libitum, for 81 days with the allocated diets. The apparent digestibilities of dry mater, crude protein and energy were high (96.2-97.3%),...
Tipo: Text Palavras-chave: Scylla serrata; Tissue growth; Feed efficiency; Protein requirement; Soy protein concentrate; Energy budget.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00211/32196/30630.pdf
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Impact of Brown Ring Disease on the energy budget of the Manila clam Ruditapes philippinarum ArchiMer
Flye Sainte Marie, Jonathan; Pouvreau, Stephane; Paillard, Christine; Jean, Fred.
Brown Ring Disease (BRD) is a bacterial disease caused by the pathogen, Vibrio tapetis. The disease induces formation of a brown deposit on inner shell of the Manila clam, Ruditapes philippinarum. Development of this disease is correlated with a decrease in the condition index of infected clams. Experiments were conduced in order to assess the effect of the development of BRD on two parameters affecting the energy balance of the clams: the clearance and the respiration rates. Experiments were performed in a physiological measurement system that allowed simultaneous measures of clearance and respiration rates. During both acclimation and measurements clams were fed with cultured T-iso and temperature was close to seasonal field temperature (10 degrees C....
Tipo: Text Palavras-chave: Ruditapes philippinarum; Respiration rate; Filtration; Energy budget; Clearance rate; Brown Ring Disease.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3013.pdf
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Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model ArchiMer
Moat, B. I.; Sinha, B.; Josey, S. A.; Robson, J.; Ortega, P.; Sévellec, Florian; Holliday, N. P.; Mccarthy, G. D.; New, A. L.; Hirschi, J. J.-m..
An ocean mixed layer heat budget methodology is used to investigate the physical processes determining subpolar North Atlantic (SPNA) sea surface temperature (SST) and ocean heat content (OHC) variability on decadal-multidecadal timescales using the state-of-the-art climate model HadGEM3-GC2. New elements include development of an equation for evolution of anomalous SST for interannual and longer timescales in a form analogous to that for OHC, parameterization of the diffusive heat flux at the base of the mixed layer and analysis of a composite AMOC event. Contributions to OHC and SST variability from two sources are evaluated i) net ocean-atmosphere heat flux and ii) all other processes, including advection, diffusion and entrainment for SST. Anomalies in...
Tipo: Text Palavras-chave: Atmosphere-ocean interaction; Climate variability; Energy budget; Balance; Fluxes; Heat budgets; Fluxes; Surface temperature.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00502/61395/65060.pdf
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International study on <i>Artemia</i> : 17. Energy consumption in cysts and early larval stages of various geographical strains of <i>Artemia</i> OMA
Vanhaecke, P.; Lavens, P.; Sorgeloos, P..
Variations in dry weight, caloric content and ash content during cyst hatching and early larval development have been studied for various geographical strains of <i>Artemia</i> . In general, decapsulated cysts contain 30 to 40% more energy than freshly hatched nauplii; for Chaplin Lake and Buenos Aires <i>Artemia</i> this difference amounts to 57%. Ash contents increase as decapsulated cysts hatch into instar I and molt into instar II-III nauplii. Over a 24h larval developmental period individual dry weights and energy content of the nauplii decrease with 16-34% and 22-37% respectively.A small but significant correlation exists between the survival rate of starved nauplii and either the energy content of instar I and instar II-III...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cysts; Energy budget; Larval stages; Artemia.
Ano: 1983 URL: http://www.vliz.be/imisdocs/publications/261926.pdf
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Les apports organiques et leur transformation en milieu abyssal à l'interface eau-sédiment dans l'Océan Atlantique tropical ArchiMer
Khripounoff, Alexis; Rowe, Gilbert T.
Five particle traps were deployed at depths of 4 400 to 4 900 rn at two stations on the Demerara abyssal plain and one station on the Cape Verde abyssal plain (tropical Atlantic). At the same time, an intensive sampling of superficial sediments was carried out using a 0,25 m2 box corer. The total particle flux varied from 372 to 87,7 mg dry weightfm2/day. The average concentration of organic carbon was 40 mg/g of material collected. ln the surface sediment this was only 4 mg/g. A direct relationship existed between the intensity of the flux of organic matter and the richness of the organic matter of the deposited sediment. According to our calculations, more than 90% of the organic matter arriving at the bottom is consumed by the abyssal benthos and only...
Tipo: Text Palavras-chave: Milieu abyssal; Flux particulaire; Bilan d'énergie; Biochimie des particules et des sédiments; Atlantique tropical; Deep-sea; Particles flux; Tropical atlantic; Energy budget; Biochemitry of particles and sediments.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/00112/22318/19991.pdf
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Modeling Japanese oyster physiological processes under natural tidal variation in suspended particulate matter ArchiMer
Barille, Laurent; Prou, Jean.
Feeding and growth of the Japanese oyster Crassostrea gigas is simulated by a deterministic model. However, physiological processes, estimated by statistical relationships, have not been tested under extreme environmental conditions such as high level of suspended particulate matter. Ecophysiological experiments were therefore conducted in situ in the Bay of Marennes-Oléron during a spring and neap tide cycle in May 1991, to get a better representation of 2 important components of the energy budget of the Japanese oyster: clearance rate and selection efficiency. The relationships previously established by Raillard et al. (1993) are re-evaluated by integrating the action of high seston load, typical of tidal effect within estuaries, on the physiological...
Tipo: Text Palavras-chave: Tidal cycles; Oysters culture; Growth; Feeding; Energy budget; Ecophysiology.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/acte-3827.PDF
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Modelling the effect of food depletion on scallop growth in Sungo Bay (China) ArchiMer
Bacher, Cedric; Grant, Jon; Hawkins, Anthony; Fang, Jianguang; Zhu, Mingyuan; Besnard, Melanie.
Sungo Bay (China) has a mean depth of 10 m, a total area of 140 km(2) and is occupied by several types of aquaculture, whilst opening to the ocean. The production of scallops (Chlamys farreri) cultured on long lines is estimated to exceed 50 000 tonnes (total weight) per year. Selection of sites for scallop growth and determination of suitable rearing densities have become important issues. In this study, we focused on the local scale (e.g. 1000 m) where rearing density, food concentration and hydrodynamics interact. We have developed a depletion model coupling a detailed model of C. farreri feeding and growth and a one-dimensional horizontal transport equation. The model was applied to assess the effect of some environmental parameters (e.g. food...
Tipo: Text Palavras-chave: Chlamys farreri; Transport equation; Rearing density; Energy budget.
Ano: 2003 URL: https://archimer.ifremer.fr/doc/2003/publication-570.pdf
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New way to estimate efficient use of energy in copepods during migrations ArchiMer
Petipa, T; Ostrovskaya, N.
It is shown that the energy expenditures on the mechanical movements of copepods depend on the knowledge of character of velocity movements range at active phase. The method of direct estimates of energy expenditures for copepod vertical migration permits to determine more real coefficients of chemical energy utilization on the mechanical work.
Tipo: Text Palavras-chave: Copepoda; Analytical techniques; Vertical migrations; Locomotion; Energy budget.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1523.pdf
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Nutrition chez des copepodes en milieu lagunaire mediterraneen en fonction de la concentration en particules et de la temperature ArchiMer
Gaudy, R; Pagano, M.
The zooplankton of an eutrophic brackish lagoon (Etang de Berre), near Marseille (France) was studied during an annual cycle. It was characterized by large populations of a pelagic copepod (Acartia tonsa ). Grazing on natural particles by this species was investigated. Adults were able to use an extended range of particle sizes, but showed selectivity for particles concentration was observed (14 mu m). Temperature and particles concentration appear to modify the selectivity behavior. Juvenile stages could also catch particles of various size but did not show the same selectivity for the peak particles as adults. Daily food ration was high comparatively to open-sea copepods. Taking into account several results obtained on food ration, egg production and...
Tipo: Text Palavras-chave: Copepoda; Lagoons; Energy budget; Seasonal variations; Particle concentration; Zooplankton; Food availability; Temperature effects; Nutrition.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1526.pdf
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Simulation of tides, residual flow and energy budget in the Gulf of California ArchiMer
Carbajal, N; Backhaus, Jo.
With the application of a two-dimensional nonlinear hydrodynamical-numerical semi-implicit model, the principal tides M(2), S(2), K(2), N(2), K(1), P(1) and O(1) were studied. Energy budgets of the semi-diurnal M(2) and S(2) were calculated separately. The linear sum of these budgets was compared with the tidal energy budget obtained when these two tidal constituents interact. Since a quadratic form for the bottom friction was used, remarkable differences were found. The results show that in the area of the Colorado River delta, the dissipation of tidal energy is very strong. Intense tidal currents were observed in the same region and over the Salsipuedes Sill. Energy budgets calculated for forcing waves of different periods, but of the same amplitude,...
Tipo: Text Palavras-chave: Modèle numérique; Marée; Courant résiduel; Bilan énergétique; Seiche; Numerical modelling; Tide; Residual flow; Energy budget; Seiche.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43666/43204.pdf
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Studies of the life-history and energetics of marine and brackish-water nematodes: 2. Production, respiration and food uptake by <i>Monhystera disjuncta</i> OMA
Herman, P.M.J.; Vranken, G..
An energy budget was constructed for the marine nematode <i>Monhystera disjuncta</i>. Respiration was measured with a modified Cartesian diver technique, in which the nematodes were kept in agar inside the diver 'head'. The relationship between respiration and body weight was: R=1.53 W<sup>0.75</sup>. Body growth was exponential during the juvenile phase, with a growth rate equal to 0.61 d<sup>-1</sup>. After maturation the growth rate fell to 0,17 d<sup>-1</sup>. Food uptake was measured in experiments with radiolabeled bacteria. In one series of experiments the accumulation of radiolabel in the nematodes was followed. In a second series the decrease in labeling was followed when pre-labeled nematodes fed on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioenergetics; Brackishwater environment; Energy budget; Energy flow; Feeding; Life history; Meiobenthos; Respiration; Monhystera disjuncta; Nematoda [Nematodes].
Ano: 1988 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3146
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Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae) RChHN
FUENTES,LEOPOLDO; VILA,IRMA; CONTRERAS,MANUEL.
We evaluated the influence of water temperature (Tw) on the energy acquisition and use in the chilean silverside Basilichthys australis (Eigenmann 1927), an endemic species inhabiting freshwater ecosystems in Chile. We tested the effect of Tw (11.5, 14.0, 18.0, 22.0 and 26.0 °C) on food intake, digestibility, food transit time and metabolic rate. As expected, this study demonstrated that many physiological variables under study were significantly affected by Tw, as well as the net energy balance of this species. Nevertheless, the net energy balance was not strictly related to the range of Tws evaluated. At Tws lower than 14 °C the energy budget was depressed, because food intake was lower than at Tws between 14 and 26 °C, where food intake was higher and...
Tipo: Journal article Palavras-chave: Water temperature; Metabolic rate; Food consumption; Digestion; Energy budget; Basilichthys australis.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200014
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