|
|
|
| Registros recuperados: 122 | |
|
|
| Flaten, Ola; Lien, Gudbrand D.; Tveteras, Ragnar. |
| Agriculture and aquaculture have common features associated with their biological nature affecting risk exposure of the businesses. The aim of this paper is to compare risk exposure in salmon farming and agricultural enterprises in Norway by using an implicit error component model to examine the risk structure of yields, prices and economic returns at the farm level. Results indicate a higher farm-level year-to-year variability in yields, prices and economic returns in salmon farming than in agricultural enterprises. The variability in livestock enterprises was generally lower than for crop enterprises. Return on assets was highest in salmon farming with an average annual return of 9.2%. All of the agricultural farm types exhibited a negative average... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Risk analysis; Variability; Norway; Risk and Uncertainty. |
| Ano: 2008 |
URL: http://purl.umn.edu/44052 |
| |
|
|
| Hutchings, Timothy R.; Nordblom, Thomas L.. |
| This study analyses the financial risk faced by representative mixed-enterprise farm businesses in four regions of south-eastern Australia. It uses discrete stochastic programming to optimise the ten-year cash flow margins produced by these farms, operating three alternative farming systems. Monte Carlo simulation analysis is used to produce a risk profile for each scenario, derived from multiple runs of this optimised model, randomised for commodity prices and decadal growing season rainfall since 1920. This analysis shows that the performance of the enterprise mixes at each site is characterised more by the level of variability of outcomes than by the mean values of financial outputs. It demonstrates that relying on mean values for climate and prices... |
| Tipo: Article |
Palavras-chave: Farm management; Financial risk; Climate risk; Price risk; Variability; Farm Management. |
| Ano: 2011 |
URL: http://purl.umn.edu/120908 |
| |
|
|
| Risebrobakken, B; Jansen, E; Andersson, C; Mjelde, E; Hevroy, K. |
| High-resolution records from IMAGES core MD95-2011 in the eastern Norwegian Sea provide evidence for relatively large- and small-scale high-latitude climate variability throughout the Holocene. During the early and mid-Holocene a situation possibly driven by consistent stronger westerlies increased the eastward influence of Arctic intermediate and near-surface waters. For the late Holocene a relaxation of the atmospheric forcing resulted in increased influence of Atlantic water. The main changes in Holocene climate show no obvious connection to changing solar irradiance, and spectral analysis reveals no consistent signature for any periodic behavior of Holocene climate at millennial or centennial timescales. There are, however, indications of consistent... |
| Tipo: Text |
Palavras-chave: Holocene; Climate; Nordic Seas; NAO; High resolution; Variability. |
| Ano: 2003 |
URL: https://archimer.ifremer.fr/doc/00224/33500/32119.pdf |
| |
|
|
| Kienast, M.; Lehmann, M. F.; Timmermann, A.; Galbraith, E.; Bolliet, T.; Holboum, A.; Normandeau, C.; Laj, C.. |
| Sedimentary delta(15)N records from the oligotrophic western equatorial Pacific (WEP) off Mindanao show that late Holocene sedimentary delta(15)N is substantially lower than that of the early Holocene, following a gradual >3 parts per thousand decrease that occurred between 7 and 3 kyrs ago. Analyses of modem day nitrate isotope profiles from the same region indicate the sensitivity of the WEP N pools towards (1) the advection of (15)N-enriched nitrate from the Eastern Equatorial Pacific (EEP) by the North Equatorial Current (NEC) and the Mindanao Current in subsurface waters and, (2) at shallow depths, the input of new and (15)N-depleted nitrate through N, fixation. We suggest that the Holocene decrease in sedimentary delta(15)N reflects a diminished... |
| Tipo: Text |
Palavras-chave: Tropical Pacific; El Nino; Surface temperature; Fresh water; Nitrate; Mindanao; Ocean; Variability; Holocene; Seawater. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00207/31843/30257.pdf |
| |
|
|
| Willemse, F.; Helversen, O. von; Odé, B.. |
| This paper presents a summary of the current knowledge on the systematics of the Greek taxa of Chorthippus, morphologically characterised by angled lateral pronotal keels (usually grouped as Glyptobothrus). Prior to this paper, based on traditional morphology, ten taxa of Chorthippus with angled lateral pronotal keels were recognized from Greece. Based on morphology as well as (and more importantly so) bioacoustics thirteen Greek taxa are now recognised. With addition of a few additional related taxa that occur only outside Greece, all are treated in this paper: Chorthippus apricarius apricarius (Linnaeus, 1758), C. vagans vagans (Eversmann, 1848) (not in Greece), C. v. cypriotus (Uvarov, 1936) stat. nov. [Cyprus], C. v. africanus Nadig, 1981 [N. Africa],... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Chorthippus; Glyptobothrus; Greece; Acrididae; Orthoptera; Morphology; Bioacoustics; Taxonomy; Variability; Transitional or hybrid populations; Phylogeny; Evolution; Palaeobiogeography; Key; Distribution; Ecology; 42.75. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/314191 |
| |
|
|
| Schilthuizen, M.. |
| The Choleva agilis-group is revised. The three species are redescribed and their zoogeography is discussed. The phylogeny of the three species is hypothesized. Choleva jailensis Jeannel, 1923 and C. agilis clermonti van der Wiel, 1931 are new synonyms of C. agilis (Illiger, 1798). C. lederiana var. brevicollis Krogerus, 1926, is a new synonym of C. lederiana Reitter, 1901. The cavernicolous taxon gracilenta Szymczakowski, 1957, formerly regarded as a subspecies of C. lederiana, is transferred to C. septentrionis Jeannel, 1923. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cholevidae; Choleva; Key; Phylogeny; Zoogeography; Variability; Europe; 42.75. |
| Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/318021 |
| |
|
|
| Schilthuizen, M.; Welter-Schultes, F.W.; Wiese, V.. |
| On the basis of both detailed distributional field studies and morphological analyses, a revision of the polytypic species Albinaria hippolyti from Central and Eastern Crete is presented. True subspecies are distinguished from mere geographic varieties by the presence of narrow hybrid zones. Using this criterion, four adjoining subspecies are recognised: A. h. hippolyti (Boettger, 1878), A. h. aphrodite (Boettger, 1883), A. h. holtzi (Sturany, 1904) and A. h. harmonia subspec. nov. Additionally, two geographically isolated and conchologically distinctive forms are also treated as subspecies: A. h. arthuriana (Boettger, 1878) and A. h. asterousea subspec. nov. The geographical distribution and variability of each subspecies is described in detail. A. h.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Gastropoda; Pulmonata; Clausiliidae; Albinaria hippolyti; Taxonomy; Hybrid zones; Variability; Zoogeography; 42.73. |
| Ano: 1993 |
URL: http://www.repository.naturalis.nl/record/318774 |
| |
|
|
| Maciel,Gabriel M; Finzi,Rafael R; Carvalho,Fábio J; Marquez,Guilherme R; Clemente,Andressa A. |
| ABSTRACT The genotypes evaluation in a germplasm bank is essential to determine their commercial or usefulness, as potential parents, in a breeding program. We aimed to detect the genetic diversity of 42 tomato genotypes of cherry type, belonging to the germplasm bank of the Federal University of Uberlândia and, also evaluate their behavior. The experiment was conducted in a greenhouse in randomized block design with 42 treatments and two replications. Ten quantitative traits of agronomic importance were evaluated. The genetic divergence was obtained by multivariate analysis, using the Mahalanobis distance with different clustering methods (UPGMA and Tocher). The hybrids performance was compared by Scott-Knott (p= 0.05) and Dunnett’s test (p= 0.05). UPGMA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum lycopersicum; Variability; Grape tomato. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000200167 |
| |
|
| |
|
|
| Cañadas-López,Álvaro Gustavo; Rade-Loor,Diana Yasbhet; Quijije-Pinargote,Raúl Ovidio; Sotomayor,Ignacio Antonio; Ormaza-Molina,Alexandra Maricela. |
| Abstract Tomato (Solanum lycopersicum L.) processing industry requires varieties with increased production and quality, and also with resistance to pest, in order for producers to cultivate these. The aim of this study was to carry out an evaluation of 112 tomato cultivars for production and quality characteristics from the following providers: Orsetti Seed, Heiz Seed, Ohio University, United Genetic and Harrys Moran. The experiment was conducted at the Experimental Research Station Portoviejo of INIAP. Statistical analyses used were principal components analysis for a group of112 cultivars based on production parameter: yield (t.ha-1), average fruit weight (g), number of fruits per plant, defective fruits per plant; in addition to quality parameters as:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Variability; Production; Quality; Paste; Food processing; Breeding program. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200347 |
| |
|
| |
|
|
| Ganachaud, Alexandre; Gourdeau, Lionel; Kessler, William. |
| The South Equatorial Current (SEC), the westward branch of the South Pacific subtropical gyre, extends from the equator to 30 degrees S at depth. Linear ocean dynamics predict that the SEC forms boundary currents on the eastern coasts of the South Pacific islands it encounters. Those currents would then detach at the northern and southern tips of the islands, and cross the Coral Sea in the form of jets. The Fiji Islands, the Vanuatu archipelago, and New Caledonia are the major topographic obstacles on the SEC pathway to the Australian coast. Large-scale numerical studies, as well as climatologies, suggest the formation of three jets in their lee: the north Vanuatu jet (NVJ), the north Caledonian jet (NCJ), and the south Caledonian jet (SCJ), implying a... |
| Tipo: Text |
Palavras-chave: Tropical Pacific ocean; Depth integrated flow; Zonal jets; Coral sea; Circulation; Waters; Variability; Generation; Island; Heat. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00207/31809/30221.pdf |
| |
|
|
| Vale, Welington Gonzaga do; UENF; Garcia, Ricardo Ferreira; UENF; Thiebaut, Jose Tarcísio Lima; UENF; Gravina, Geraldo de Amaral; UENF. |
| O objetivo deste trabalho foi caracterizar, estatisticamente, as variáveis patinagem dos rodados, espaço percorrido por parcela, área da parcela trabalhada, capacidade de campo teórica e efetiva de uma semeadora em sistema de semeadura direta (SD) e convencional (SC), com base na verificação do ajuste de uma série de dados a uma distribuição estatística, visando indicar a melhor forma de representação e valores a serem adotados para que estas variáveis sejam utilizadas em operações de práticas agrícolas. O experimento na SC foi realizado com velocidade de 1,5 m s-1, com 190 repetições, durante a semeadura de milho em solo classificado como Cambissolo; o experimento na SD, com 1,8 m s-1 e 58 repetições, durante a semeadura de sorgo em solo classificado... |
|
Palavras-chave: 5.03.00.00-8 Engenharia Agrícola mecanização agrícola; Variabilidade; Número de amostras Mecanização agrícola agricultural mechanization; Variability; Number of samples. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/951 |
| |
|
|
| González Jiménez, Vianey. |
| Se llevó a cabo una caracterización morfológica de 12 variedades de caña de azúcar del estado de Tabasco mediante descriptores morfológicos, se identificó la filogenia por medio de secuenciamiento de la región ITS de DNA ribosómico y trnL-F cloroplástico, y se hizo una caracterización molecular usando la técnica AFLP. La descripción fenotípica se llevó a cabo considerando las características de entrenudo, hoja y yema. En la amplificación del DNA ribosómico se utilizaron los iniciadores ITS4 e ITS5. Para la amplificación del cloroplasto se utilizaron los iniciadores universales trnL-F. El procedimiento para la realización de los AFLPs se realizó siguiendo las recomendaciones descritas en el Kit AFLP®Analysis System I y AFLP® Starter Primer Kit. Entre las 12... |
| Tipo: Tesis |
Palavras-chave: Caña de azúcar; AFLPs; DNA; Variabilidad; Maestría; Producción Agroaliemtaria en el Trópico; Sugarcane; Variability. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1558 |
| |
|
| |
|
| |
|
|
| Silva,Ana Veruska Cruz da; Amorim,Julie Anne Espíndola; Vitória,Marina Ferreira da; Ledo,Ana da Silva; Rabbani,Allivia Rouse Carregosa. |
| ABSTRACT The state of Sergipe is the largest mangaba producer, which is a fruit native to Brazil, and has cultural, social and economic importance in its area of occurrence. It is an endangered species due to human actions, and despite its economic potential, there are still no commercial plantations. The study was carried out in order to characterize trees, fruits and the genetic diversity of natural populations of mangaba in Sergipe, Brazil. Fruits from Abaís Beach/Estância (AB) presented, on average, twice the vitamin C content (414.81 mg of vit. C/100g), when compared with the others. The use of ISSR primers was efficient in estimating the genetic similarity of populations. The primers clustered the populations of mangaba according to their origin,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hancornia speciosa Gomes; Postharvest; Molecular markers; Variability. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000300255 |
| |
|
| |
|
| |
| Registros recuperados: 122 | |
|
|
|
