Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 18
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Available Benthic Energy Coefficient (ABEC): a generic tool to estimate the food profitability in coastal fish nurseries ArchiMer
Tableau, Adrien; Le Bris, H.; Brind'Amour, Anik.
The benthic production of prey seems to be one of the main drivers among many environmental factors that influence the quality of fish nurseries and potentially limit their carrying capacity. However, the contribution of food availability in the growth and survival of juveniles is still controversial. The Available Benthic Energy Coefficient (ABEC) aims to assess the trophic profitability of benthic invertebrate prey; this concept reflects the combination of energy richness and availability of prey. A value of the coefficient was associated with each prey species. This value was calculated from the product of 4 components: (1) mass energy, (2) productivity, (3) regeneration, and (4) accessibility. Thus, this coefficient is expressed as a quantity of energy...
Tipo: Text Palavras-chave: Predator-prey relationship; Secondary production; Prey availability; Demersal fish; Nursery habitat; Carrying capacity; Bioenergetics.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00260/37079/35588.pdf
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
Citotoxicity of Fipronil on Hepatocytes Isolated from Rat and Effects of Its Biotransformation BABT
Guelfi,Marieli; Maioli,Marcos Antonio; Tavares,Marco Aurélio; Mingatto,Fábio Erminio.
ABSTRACT The aim of this study was to characterize the mechanism of toxicity of fipronil on hepatocytes isolated from the rat and the effect of its biotransformation on the toxicological potential. The toxicity of fipronil was assessed by monitoring the oxygen consumption and mitochondrial membrane potential, intracellular ATP concentration, Ca2+ homeostasis and cell viability. The cell viability was evaluated by trypan blue exclusion in hepatocytes that were isolated from the normal rats and by the release of the enzymes alanine transaminase and aspartate transaminase in hepatocytes that were isolated from the normal rats or proadifen-pretreated rats. Fipronil reduced mitochondrial respiration in the cells that were energized with glutamate plus malate in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fipronil; Hepatotoxicity; Bioenergetics; Biotransformation; Calcium homeostasis.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000600843
Imagem não selecionada

Imprime registro no formato completo
Connectivity patterns of anchovy larvae in the Bay of Biscay from a coupled transport-bioenergetic model forced by size-structured zooplankton ArchiMer
Huret, Martin; Vandromme, Pieter; Petitgas, Pierre; Pecquerie, Laure.
Connectivity during early life stages of pelagic fish, defined here by survival probability between spawning and early juvenile habitats, depends on a combination of sufficient food availability and low predator encounter along drift trajectories. For anchovy in the Bay of Biscay, larval transport experiments throughout the spawning season suggest accumulation of early juveniles in the offshore area of the southern Bay, as well as retention over the mid-shelf at mid-latitude. However, late summer-early autumn surveys suggest presence of juveniles only in the former region. From this observation, we set up a bioenergetic individual based model to test for the effect of food availability on survival patterns. The model couples a Lagrangian transport module...
Tipo: Text Palavras-chave: Connectivity; Larval IBM; Bioenergetics; Zooplankton; Bay of Biscay; European anchovy.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00105/21655/19237.pdf
Imagem não selecionada

Imprime registro no formato completo
Ecología trófica de la anchoíta (Engraulidae, Engraulis anchoita)del Mar Argentino. Parte III. Requerimiento trófico individual en relación con el crecimiento, ciclo sexual y las migraciones estacionales OceanDocs
Angelescu, V.A.; Anganuzzi, A..
The paper was developed in order to arrange the data gathered on this subject and to generate new hypotheses in connection with the trophic strategy of the northern stock of anchovy in the area between latitudes 35°-42°S. Such estimates were finally compared with the values of the gravimetric determinations of stomach contents- as converted to caloric values - of individuals grouped by total-length amd age classes, ecological areas, and seasons of the year. The set of results as obtained conforms the initial basis for developing Part IV of the Trophic Ecology of the Argentine anchovy as related to food consumption estimates, by stock biomass and annual classes, with back-calculations to age class 0, and for applying "regional patterns" that result from the...
Tipo: Journal Contribution Palavras-chave: Growth curves; Bioenergetics; Migrations; Length-weight relationships; Condition factor.
Ano: 1986 URL: http://hdl.handle.net/1834/2022
Imagem não selecionada

Imprime registro no formato completo
Ecophysiological responses to the effect of annual management on an endemic viviparous fish in central plateau of México Neotropical Ichthyology
Garcia-Trejo,Fernando; Hurtado-Gonzalez,Silvia Laura; Soto-Zarazúa,Genaro; Alatorre-Jacome,Oscar; Rico-García,Enrique; Gutiérrez-Yurrita,Pedro Joaquín.
Studies on the biological aspects of fish typically focus on species that currently have commercial value, causing species that lack such market value to be ignored. This is the case of several freshwater fish, specifically of several members of the Goodeidae family. In the State of Querétaro there are several species of this family characterized for being viviparous and having distinctive sexual dimorphism that may have commercial potential. The subject of this study is Girardinichthys multiradiatus, a viviparous fish endemic to the upper-half of the Lerma River basin. The lack of knowledge regarding its biology and ecology has prevented the development of guidelines to manage its habitat and to preserve its population. The objective was to determine the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioenergetics; Conservation; Deterioration; Population dynamic; Trophic spectrum.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100117
Imagem não selecionada

Imprime registro no formato completo
Energetic efficiency of protein and body fat retention in crossbred Bos indicus and Bos Taurus × Bos indicus raised under tropical conditions R. Bras. Zootec.
Henrique,Douglas Sampaio; Queiroz,César de; Vieira,Ricardo Augusto Mendonça; Botelho,Mosar Faria.
The efficiency of fat and protein retention by Bos indicus and its cross-breds was estimated from data obtained in the literature to verify possible differences between these animals and Bos taurus. After estimating the efficiencies, a correction factor was used to discount the metabolizable energy fraction that was spent in the maintenance and support metabolism processes. The efficiencies were then estimated again, assuming that all the remaining energy would correspond to the metabolizable energy available for body mass retention. The correction value used was considered satisfactory to discount energetic losses for maintenance and support. The efficiency values of partial body fat and protein retention in Bos indicus and its cross-bred were very...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef-cattle; Bioenergetics; Mathematical models.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000800024
Imagem não selecionada

Imprime registro no formato completo
Energy density of anchovy Engraulis encrasicolus in the Bay of Biscay ArchiMer
Dubreuil, Julien; Petitgas, Pierre.
The energy density (E-D) of anchovy Engraulis encrasicolus in the Bay of Biscay was determined by direct calorimetry and its evolution with size, age and season was investigated. The water content and energy density varied seasonally following opposite trends. The E-D g(-1) of wet mass (M-W) was highest at the end of the feeding season (autumn: c. 8 kJ g(-1) M-W) and lowest in late winter (c. 6 kJ g(-1) M-W). In winter, the fish lost mass, which was partially replaced by water, and the energy density decreased. These variations in water content and organic matter content may have implications on the buoyancy of the fish. The water content was the major driver of the energy density variations for a M-W basis. A significant linear relationship was...
Tipo: Text Palavras-chave: Seasonal cycle; Reserves; Bioenergetics.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6143.pdf
Imagem não selecionada

Imprime registro no formato completo
Estimation of the total efficiency of metabolizable energy utilization for maintenance and growth by cattle in tropical conditions R. Bras. Zootec.
Henrique,Douglas Sampaio; Vieira,Ricardo Augusto Mendonça; Malafaia,Pedro Antônio Muniz; Mancini,Maurício Cordeiro; Gonçalves,André Luigi.
Data of 320 animals were obtained from eight comparative slaughter studies performed under tropical conditions and used to estimate the total efficiency of utilization of the metabolizable energy intake (MEI), which varied from 77 to 419 kcal kg-0.75d-1. The provided data also contained direct measures of the recovered energy (RE), which allowed calculating the heat production (HE) by difference. The RE was regressed on MEI and deviations from linearity were evaluated by using the F-test. The respective estimates of the fasting heat production and the intercept and the slope that composes the relationship between RE and MEI were 73 kcal kg-0.75d-1, 42 kcal kg-0.75d-1 and 0.37. Hence, the total efficiency was estimated by dividing the net energy for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioenergetics; Growth; Net energy; Ruminants.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982005000300034
Imagem não selecionada

Imprime registro no formato completo
Fenntarthatósági kihívások és a biomassza-alapú energiatermelés AgEcon
Dinya, Laszlo.
Az emberiséget érintő globális kihívások között az energiaellátás növekvő fon¬tossága sokak figyelmét ráirányítja az agrárgazdaság ilyen irányú lehetséges szerepére. Magyarország kiváló mezőgazdasági adottságaiból kiindulva többen már biomassza nagyhatalomként is aposztrofálták hazánkat. A biomassza-alapú energiatermelés (azaz a bioenergetika) lehetőségeinek és korlátainak vitájában azonban gyakran elkövetik azt a hibát, hogy a kérdést a fenntarthatóságtól függetlenül tárgyalják. Ennek következtében országos, ágazati vagy projektszinten is találkozha¬tunk félrevezető kalkulációkkal, amelyek téves üzleti vagy akár gazdaságpolitikai döntések forrásává álhatnak. Tanulmányunkban azt javasoljuk, hogy a bioenergetikai ágazat stratégiai fejlesztésénél a...
Tipo: Journal Article Palavras-chave: Fenntartható energiagazdálkodás; Bioenergetika; Bioenergetikai potenciál; Társadalmi és környezeti hatások; Sustainable energy management; Bioenergetics; Bioenergy potential; Social and environmental effects; Agricultural and Food Policy; Environmental Economics and Policy; Land Economics/Use.
Ano: 2009 URL: http://purl.umn.edu/92488
Imagem não selecionada

Imprime registro no formato completo
Integrating the effects of salinity on the physiology of the eastern oyster, Crassostrea virginica, in the northern Gulf of Mexico through a Dynamic Energy Budget model ArchiMer
Lavaud, Romain; La Peyre, Megan K.; Casas, Sandra M.; Bacher, Cedric; La Peyre, Jerome F..
We present a Dynamic Energy Budget (DEB) model for the eastern oyster, Crassostrea virginica, which enables the inclusion of salinity as a third environmental variable, on top of the standard foodr and temperature variables. Salinity changes have various effects on the physiology of oysters, potentially altering filtration and respiration rates, and ultimately impacting growth, reproduction and mortality. We tested different hypotheses as to how to include these effects in a DEB model for C. virginica. Specifically, we tested two potential mechanisms to explain changes in oyster shell growth (cm), tissue dry weight (g) and gonad dry weight (g) when salinity moves away from the ideal range: 1) a negative effect on filtration rate and 2) an additional...
Tipo: Text Palavras-chave: DEB theory; Bioenergetics; Filtration; Maintenance; Growth; Estuary; Louisiana.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00400/51137/53773.pdf
Imagem não selecionada

Imprime registro no formato completo
Mechanisms involved in reproductive damage caused by gossypol in rats and protective effects of vitamin E Biol. Res.
Santana,Andréia T; Guelfi,Marieli; Medeiros,Hyllana C D; Tavares,Marco A; Bizerra,Paulo F V; Mingatto,Fábio E.
BACKGROUND: Gossypol is a chemical present in the seeds of cotton plants (Gossypium sp.) that reduces fertility in farm animals. Vitamin E is an antioxidant and may help to protect cells and tissues against the deleterious effects of free radicals. The aim of this study was to evaluate the mechanisms of reproductive toxicity of gossypol in rats and the protective effects of vitamin E. Forty Wistar rats were used, divided into four experimental groups (n = 10): DMSO/ saline + corn oil; DMSO/saline + vitamin E; gossypol + corn oil; and gossypol + vitamin E. RESULTS: Fertility was significantly reduced in male rats treated with gossypol in that a significant decrease in epididy-mal sperm count was observed (P < 0.05) and the number of offspring was...
Tipo: Journal article Palavras-chave: Gossypol; Fertility; Oxidative stress; Bioenergetics; Antioxidant system; Vitamin E.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100043
Imagem não selecionada

Imprime registro no formato completo
Relationship between feed efficiency indexes and performance, body measurements, digestibility, energy partitioning, and nitrogen partitioning in pre-weaning dairy heifers. Repositório Alice
LAGE, C. F. DE A.; COELHO, S. G.; DINIZ NETO, H. DO C.; MALACCO, V. M. R.; RODRIGUES, J. P. P.; SACRAMENTO, J. P.; MACHADO, F. S.; PEREIRA, L. G. R.; TOMICH, T. R.; CAMPOS, M. M..
Abstract The objectives of this study were: 1) to classify animals into groups of high and low feed efficiency using two feed efficiency indexes (Residual feed intake (RFI) and residual feed intake and body weight gain (RIG)), and 2) to evaluate if pre-weaning heifer calves divergent for feed efficiency indexes exhibit differences in performance, body measurements, digestibility, energy partitioning, and nitrogen partitioning. A total of 32 Gyr heifer calves were enrolled in a 63-d trial and classified into two feed efficiency (FE) groups based on RFI and RIG (mean ± 0.5 SD). The groups were classified as high efficiency (HE) RFI (HE RFI, n = 9; HE RIG, n = 10), and low efficiency (LE) RFI (LE RFI, n = 10; LE RIG, n = 11). The remaining animals were...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Feed efficiency; Hip; Bioenergetics; Milk; Methane; Diet; Nutrients.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118613
Imagem não selecionada

Imprime registro no formato completo
Seasonal development of bacterial communities in a coastal marine sediment as related to the input of organic material. ArchiMer
Meyerreil, L; Graf, G.
The seasonal development of benthic communities was followed in a coastal marine sediment of the Kiel Bight (Baltic Sea; FRG). Total benthic biomass, (ATP), bacterial biomass, overall benthic activity (heat production), and enzymatic decomposition rates of carbohydrate (d-amylase activity) followed a seasonal cycle strongly related to certain events in the sediment. Among these, the input of the phytoplankton blooms in autumn and spring, the accumulation of organic material during winter, and changes in the physical characteristics of the sediment turned out to be most important for the development of benthic biomass and activity. Processes within the benthic community occurred in very short time scales (within days).
Tipo: Text Palavras-chave: Bacteria; Organic matter; Sediments; Bioenergetics; Enzymatic activity; Biomass.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-944.pdf
Imagem não selecionada

Imprime registro no formato completo
Studies of the life-history and energetics of marine and brackish-water nematodes: 1. Demography of <i>Monhystera disjuncta</i> at different temperature and feeding conditions OMA
Vranken, G.; Herman, P.M.J.; Heip, C.H.R..
Aspects of the demography of <i>Monhystera disjuncta</i> were investigated at different feeding conditions (monoxenic cultures with different bacterial strains, and different densities in the feeding suspension with one strain). Embryonic development time, minimum generation time, egg deposition rate and adult longevity depend on temperature, quality and quantity of food offered. Body mass at maturity is an allometric function of food density. It is shown that a previously inferred selectivity in food uptake is an artifact of culture conditions. pH buffering and addition of sterols permit culture of the species on a wide variety of bacterial strains. <i>M. disjuncta</i> is less well adapted to take advantage of high food density...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioenergetics; Brackishwater environment; Cultured organisms; Feeding; Life history; Marine environment; Meiobenthos; Temperature effects; Water temperature; Monhystera disjuncta.
Ano: 1988 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3159
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
Study of the effect of Aliette on the activity of spinach (Spinacea oleracea L.) chloroplasts Braz. J. Plant Physiol.
Almeida,Pedro; Coutinho,João P.; Rocha,João; Gomes-Laranjo,José.
Intensification of production in modern agriculture is frequently obtained thanks to the increase of pesticide applications and chemical fertilizers. However, the use of these products sometimes causes a reduction of crop productivity. We aimed to evaluate the impact of the fungicide Aliette on in vitro activity of chloroplasts of spinach (Spinacea oleracea L.). Transmembrane potential formation, PSII oxygen evolution and PSII photochemistry were analyzed. Our results showed that the recommended concentration (2.5 g L-1) of Aliette did not impair the photosynthetic apparatus. However, at higher concentrations (> 7.5 g L-1), reductions in thylakoid membrane potential and oxygen evolution were recorded, but with no evidence of photoinhibition.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioenergetics; Ecotoxicology; Pesticides; Photosynthesis; Xenobiotics.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000100009
Imagem não selecionada

Imprime registro no formato completo
Une approche bioénergétique pour la comparaison des traits d'histoire de vie de l'anchois et de la sardine du golfe de Gascogne ArchiMer
Gatti, Paul.
Anchovy and sardine belong to the guild of small pelagic fish and are of peculiar importance at the scales of ecosystems and fisheries. Both species are worldwide spread and commonly occur in the same ecosystems. They display large interannual variability in biomass with markedly different trends or even asynchronous. A growing literature suggests that those dynamics are due to respective sensibility to environmental conditions driven by different biological traits. A priori both species are very similar but show slightly distinct feeding behaviours and reproductive strategies. Understanding divergences in both species biology and life history strategies is thus crucial to understand and predict past and future dynamics of these stocks. The aim of this PHD...
Tipo: Text Palavras-chave: Bioénergétique; Modélisation individu centrée; Cycle de vie; Traits d'histoire de vie; Petits poissons pélagiques; Bioenergetics; Individual based model; Life cycle; Life history traits; Small pelagic fishes.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00498/60917/64277.pdf
Registros recuperados: 18
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional