Consulta: subjectFacets:"Environmental effects"
Registros recuperados: 58
Data/hora: 13/06/2024 05:58:54

Genetic parameters for five traits in Africanized honeybees using Bayesian inference
Provedor de dados: 74
Autores: Padilha,Alessandro Haiduck; Sattler,Aroni; Cobuci,Jaime Araújo; McManus,Concepta Margaret.
Heritability and genetic correlations for honey (HP) and propolis production (PP), hygienic behavior (HB), syrupcollection rate (SCR) and percentage of mites on adult bees (PMAB) of a population of Africanized honeybees were estimated. Data from 110 queen bees over three generations were evaluated. Single and multi-trait models were analyzed by Bayesian Inference using MTGSAM. The localization of the hive was significant for SCR and HB and highly significant for PP. Season-year was highly significant only for SCR. The number of frames with bees was significant for HP and PP, including SCR. The heritability estimates were 0.16 for HP, 0.23 for SCR, 0.52 for HB, 0.66 for PP, and 0.13 for PMAB. The genetic correlations were positive among productive traits...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heritability; Genetic correlations; Environmental effects; Apis mellifera.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000200011

Influence des apports fluviatiles en Baie de Seine
Provedor de dados: 5
Autores: Avoine, J; Crevel, L.
Hydrological study of Seine Bay displays two areas differentiated by salinity distribution. One has marine characteristics and the other is under fluvial influence. In this paper the authors give the main results of exchanges between the environments, obtained by the study of water dilution, solid particles dispersion, and their contribution to sedimentation.
Tipo: Text
Palavras-chave: Estuarine front; River plumes; Trace metals; Salinity; Residual flow; Seasonal variations; Environmental effects; Sediment dynamics; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1275.pdf

Le Maigre, Argyrosomus regius (Asso, 1801) (Pisces, Perciformes, Sciaenidae) du Golfe de Gascogne et des eaux plus septentrionales
Provedor de dados: 5
Autores: Quero, Jean-claude; Vayne, Jean-jacques.
The meagre (Argyrosmus regius ) of Bay of Biscay is found along the coast and in the Gironde Estuary from spring to autumn, and in deeper waters during the cold season. It is never abundant at the north of the Pertuis charentais. The young individuals and adults do not have the same distribution. Spawning takes place between mid May and late July in the Gironde Estuary. The young fish feed on small crustaceans and the adults on pelagic fishes. Growth is rapid. The meagre emits loud grunts and the fishermen of the Gironde use these noises to locate the fish and to position their nets.
Tipo: Text
Palavras-chave: Pisces; Environmental effects; Fishery statistics; Fishery biology; Distribution records.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/publication-1766.pdf

Developpement des veligeres de Crassostrea gigas dans le bassin d'Arcachon. Etudes sur les mortalites larvaires.
Provedor de dados: 5
Autores: His, Edouard; Robert, Rene.
Experiments in the hatchery rearing of C. gigas larvae showed that: the antifouling paints represent a real danger for spatting areas; the larvae of Arcachon breeding stocks grown in the seawater taken from the Bay develop normally in the laboratory; and, the growth of the larvae, collected from the Bay of Arcachon and reared in hatchery at 18 degree C, confirms that the last summer temperature regimes could not explain the abnormalities. It also confirms the good quality of the seawater of the bay for C. gigas reproduction.
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Environmental effects; Veligers; Oyster culture.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1835.pdf

Context dependency of trait repeatability and its relevance for management and conservation of fish populations
Provedor de dados: 5
Autores: Killen, S. S.; Adriaenssens, B.; Marras, S.; Claireaux, Guy; Cooke, S. J.
Repeatability of behavioural and physiological traits is increasingly a focus for animal researchers, for which fish have become important models. Almost all of this work has been done in the context of evolutionary ecology, with few explicit attempts to apply repeatability and context dependency of trait variation toward understanding conservation-related issues. Here, we review work examining the degree to which repeatability of traits (such as boldness, swimming performance, metabolic rate and stress responsiveness) is context dependent. We review methods for quantifying repeatability (distinguishing between within-context and across-context repeatability) and confounding factors that may be especially problematic when attempting to measure...
Tipo: Text
Palavras-chave: Environmental effects; Intraclass correlation; Personality; Phenotypic plasticity; Reaction norm; Temperature.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00337/44823/44372.pdf

Modelling potential spawning habitat of sardine (Sardina pilchardus) and anchovy (Engraulis encrasicolus) in the Bay of Biscay
Provedor de dados: 5
Autores: Planque, Benjamin; Bellier, Edwige; Lazure, Pascal.
Large amplitude variations in recruitment of small pelagic fish result from interactions between a fluctuating environment and population dynamics processes such as spawning. The spatial extent and location of spawning, which is critical to the fate of eggs and larvae, can vary strongly from year to year, as a result of changing population structure and environmental conditions. Spawning habitat can be divided into 'potential spawning habitat', defined as habitat where the hydrographic conditions are suitable for spawning, 'realized spawning habitat', defined as habitat where spawning actually occurs, and 'successful spawning habitat', defined as habitat from where successful recruitment has resulted. Using biological data collected during the period...
Tipo: Text
Palavras-chave: Sardine; Potential spawning habitat; Generalized additive models; Environmental effects; Bay of Biscay; Anchovy.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2180.pdf

Caractérisation de marqueurs génétiques fonctionnels de la nutrition et/ou de l'adaptation (les amylases) chez l'huître creuse Crassostrea gigas : intérêts pour la sélection
Provedor de dados: 5
Autores: Prudence, Marie.
Two amylase genes, A and B, from the oyster Crassostrea gigas were characterized. Using PCR-RFLP, 6 and 4 alleles, respectively, were described for the amylase genes A and B. The roles of A and B amylase genes were investigated experimentally. They are expressed during larval and adult stages, and A transcripts are more abundant than B. The A transcript increases significantly with temperature, in high trophic conditions. However, A and B transcript levels do not change when food quantity increases although amylase activity augments. The level of B is correlated with dietary starch quantities, whereas the amount of A appears to remain constant ; simultaneously amylase activity decreases and the KM increases. These results suggest that expression of B is...
Tipo: Text
Palavras-chave: Enzymatic analyse; Genetic polymorphism; Genes; Nutrition; Growth; Environmental effects; Oysters; Amylases; Amylases; Analyse enzymatique; Polymorphisme génétique; Gènes; Nutrition; Croissance; Effets de l'environnement; Huîtres; Amylases; Amylases.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-1700.pdf

Variations des activites digestives en fonction des facteurs du milieu chez les crustaces
Provedor de dados: 5
Autores: Galgani, Francois; Benyamin, Y; Vanworhmoudt, A; Cecaldi, J.
Proteolytic enzymes of hepatopancreas of six species of peneids (Penaeus kerathurus, P. japonicus, P. monodon, P. stylirostris, P. merguiensis and P. vannamei ) have been studied. Some of their physiological variations have been characterised. Increase in acclimation temperature of crustaceans enhances increase of specific activities of proteases. Variations of salinity does not modify specific activities, nor quantities of trypsin, nor electrophoretic patterns of these different proteases.
Tipo: Text
Palavras-chave: Penaeus kerathurus; Penaeidae; Malacostraca; Diets; Growth; Larval development; Life cycle; Acclimation; Environmental effects; Digestive glands; Enzymatic activity; Salinity effects; Temperature effects; Enzymes; Endocrinology; Digestion; Développement larvaire; Croissance; Cycle d'intermue; Carboxypeptidase A and B; Leucine aminopeptidase; Chymotrypsin; Trypsine; Enzymes digestives; Homarus ganmarus; Palaemon serratus; P. vannamei; P. merguiensis; P. stylirostris; P. monodon; P. japonicus; Penaeus keratkurus.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1195.pdf

Adaptive features of a bacteriolytic enzyme from the style of the mussel Choromytilus meridionalis in response to environmental fluctuations.
Provedor de dados: 5
Autores: Seiderer, L; Robb, F.
The extracellular digestive apparatus of bivalve molluscs consists of a crystalline style containing diverse degradative enzymes which are released during rotation and dissolution of the style. This paper reviews the occurrence of a temperature-regulated bacteriolytic enzyme in the black mussel Choromytilus meridionalis , which is an inhabitant of coastal reefs on the south and south west coast of South Africa. This agent is unable to lyse Micrococcus luteus or Escherichia coli , both of which are susceptible to lysis by a true lysozyme. It appears to have a restricted spectrum of activity which includes both free-living and kelp-associated gram-negative bacteria. In addition, the level of activity varies dramatically according to the environmental water...
Tipo: Text
Palavras-chave: Choromytilus meridionalis; Bivalvia; Digestive system; Bacteria; Upwelling; Environmental effects; Adaptations; Bacteriocides; Marine molluscs; Enzymatic activity.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-991.pdf

Fatigue resistance of natural rubber in seawater with comparison to air
Provedor de dados: 5
Autores: Ulu, K. Narynbek; Huneau, B.; Le Gac, Pierre-yves; Verron, E.
Fatigue properties of filled natural rubber in seawater environment are investigated by uniaxial fatigue and crack propagation experiments, and the damage is analyzed by scanning electron microscopy. The behavior under relaxing and non-relaxing loading conditions is studied and the results are compared to those obtained in air environment. For relaxing loading conditions, fatigue behavior is the same in both environments. Under non-relaxing conditions at large strain levels, for which the influence of strain-induced crystallization is important, fatigue life is longer in seawater. Such behavior could be explained by increased internal temperatures of specimens tested in air due to lower heat conductivity of air as compared to seawater. Such conclusion is...
Tipo: Text
Palavras-chave: Natural rubber; Fatigue; Environmental effects; Seawater; Strain-induced crystallization.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00324/43523/43055.pdf

Etude des pecheries, reflexions sur l'environment et la gestion multispecifique.
Provedor de dados: 5
Autores: Le Guen, Jean-claude; Chevalier, Robert.
All considerations about halieutic stocks inevitably had to attain the recognition of relations which are established between the resource and its natural environment. These phenomenons are exposed in the first part. About consequences of human interventions, both of these aspects must be taken into account: the introduction of new species and fishing. Second part deals with the use of models in stock management.
Tipo: Text
Palavras-chave: Mollusca; Crustacea; Pisces; Fishery economics; Fishery management; Fishery biology; Stock assessment; Ecosystems; Environmental effects.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1859.pdf

Effects of environmental conditions on the sessile existence of an estuarine sediment bacterium.
Provedor de dados: 5
Autores: Geesey, G; Salas, S; Mittelman, M.
A submerged glass coverslip technique was developed to determine dissolved organic nutrient uptake by adherent cells of a sediment isolate of Enterobacter cloacae . Cells which colonized the coverslips in swirling culture flasks during anaerobic growth remained firmly attached during manipulations employed to determine uptake of radiolabeled glucose by the adherent population. The attached cells were capable of a more rapid rate of glucose uptake than free cells. Lineweaver-Burk plots demonstrated different glucose uptake kinetics for the 2 cell populations. The data suggest that physiological changes occur in cells soon after they become attached to surfaces. These changes appear to enhance the metabolic activity of the adherent population.
Tipo: Text
Palavras-chave: Enterobacter cloacae; Adhesion; Glucose; Environmental effects; Bacteria; Sediments; Estuaries; Sessile species; Culture media; Metabolism; Dissolved oxygen; Microbiological analysis.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-967.pdf

Chitin/toxicant interactions and microbial degradation within estuarine ecosystems.
Provedor de dados: 5
Autores: Portier, R; Meyers, S.
The environmental effect and fate of several agricultural and industrial source toxicants were evaluated in controlled laboratory microcosm systems in the presence of the aminopolysaccharide polymer, chitin. Toxicants examined included methyl parathion, phenol, pentachlorophenol, 2,4 dichlorophenol, 1,2 dichloroethane and Kepone. Microcosm operating parameters, including pH/Eh, salinity, temperature, flow rate and sediment/water interface conditions, were based on comparable in situ measurements. Fate analysis predictions were based on mineralization of the parent toxicant compound as measured by chromatographic analysis or super(14)CO sub(2) expiration. Chitin, amended to continuous flow microcosms, promoted either cometabolic or cooxidative...
Tipo: Text
Palavras-chave: Controlled conditions; Chemical pollutants; Industrial wastes; Pesticides; Metabolism; Food webs; Biodegradation; Ecosystems; Microorganisms; Environmental effects; Brackishwater pollution; Estuaries; Toxicants; Chitin.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1011.pdf

Evaluation de l'effet de l'environnement et de l'alimentation sur l'apparition d'anomalies de développement chez l'alevin de bar (Dicentrarchus labrax)
Provedor de dados: 5
Autores: Menu, Bruno; Robin, Jh; Gouillou-coustans, Marie-francoise.
Larvae from a natural spawn of sea bass were distributed into 3 larval rearing lines in 2 distant sites, after simulated or true transportation. The specific rearing methods in the specific rearing environment of each laboratory were used :starvation under darkness for 160 degrees days and first feeding on Artemia (PP) in the Mediterranean laboratory of Palavas;first feeding on rotifers at 75 degrees days in the laboratory of Brest (Brittany) in 250 liters (BB) tanks or 35 liters tanks (Bb) of a separate rearing line. In the 250 liters tanks in Brest, 2 additional treatments before first feeding on Artemia were tested :starvation up to 160 degrees days under darkness with no bubbling (BP);starvation up to 160 degrees days under continuous illumination with...
Tipo: Text
Palavras-chave: Pisciculture; Élevage larvaire; Malformations; Effets de l'environnement; Alimentation; Fish culture; Larval rearing; Abnormalities; Environmental effects; Diet.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00272/38284/36472.pdf

Premieres donnees sur la dynamique du peuplement macrobenthique des sables fins envases a Abra alba de la Baie de Seine orientale
Provedor de dados: 5
Autores: Gentil, F; Irlinger, J; Elkaim, B; Proniewski, F.
The dynamics of macrobenthos populations living in muddy fine sands near Seine estuary have been studied, to obtain quantitative data for the knowledge of these populations and the impact of macrotidal environment disturbances.
Tipo: Text
Palavras-chave: Seasonal variations; Population density; Population number; Ecosystem disturbance; Environmental effects; Population dynamics; Zoobenthos.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1309.pdf

Nano partículas de hierro añadidas al oeste de las Islas Galápagos
Provedor de dados: 20
Autores: Pazmiño, N.
La preocupación de efectuar estos estudios que alteran el medio natural, y que se dan en las aguas adyacentes a nuestra jurisdicción, pueden poner en riesgo la reserva marina de las Galápagos, por las condiciones oceanográficas en el área a 300 millas al Oeste de estas islas. Específicamente, el área influenciada por la Corriente Cromwell que fluye sub-superficialmente de Oeste a Este a través de la termoclina a lo largo de la línea ecuatorial puede afectar al ecosistema insular.
Tipo: Journal Contribution
Palavras-chave: Iron; Chemical fertilizers; Environmental effects; Iron; Http://aims.fao.org/aos/agrovoc/c_3950.
Ano: 2007
URL: http://hdl.handle.net/1834/2365

Estudios ecológicos en el Golfo San Jorge y adyacencias (Atlántico sudoccidental). Distribución, abundancia y variación estacional del fitoplancton en relación a factores físico-químicos y la dinámica hidrológica.
Provedor de dados: 20
Autores: Akselman, R.
This study was based on four seasonal cruises during 1984 and 1985.  It revealed a thermo-haline frontal system formed by the advection of the Coastal Water mass flowing in two branches, one running towards the coast and the other mid-shelf directed. The thermocline developed between late spring and autumn results in a low inorganic nutrient concentration in the upper layer. Nonetheless in winter, a vertical homogeneity and high nutrient concentration were observed.  Phytoplankton development presented a typical temperate-seas annual cycle. In winter, reduced populations were dominated by diatoms. The highest biomass concentration in the cycle coincided with the spring blooming, to which Thalassio sira anguste-lineata,Alexandrium tamarense, Heterocapsa...
Tipo: Theses and Dissertations
Palavras-chave: Phytoplankton; Abundance; Trophic relationships; Cysts; Seasonal variations; Seasonal thermocline; Plankton surveys; Environmental effects; Phytoplankton; Cysts; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_34811.
Ano: 1996
URL: http://hdl.handle.net/1834/1464

The effect of the Mbita Causeway on water currents in the region of Rusinga Channel, Winam Gulf, Lake Victoria: a 3D modelling study with ELCOM
Provedor de dados: 20
Autores: Romero, J.R.; Khisa, P.
The Mbita Causeway in Kenya was constructed in the early 1980’s to link Rusinga Island to the mainland to facilitate the transport of people, goods, and services to the island. One of the effects of the Causeway was to permanently block a secondary connection between Rusinga Channel and the offshore waters of Lake Victoria. This secondary channel may have served as a substantial pathway of exchange between Winam Gulf and Lake Victoria prior to the Causeway. There has been considerable scientific and political debate as to whether decreased flushing within the two bays on either side of the Causeway has occurred and led to poorer lake water quality since the construction of the barrier. In Apr.-May 2005 an intensive field investigation was undertaken to...
Tipo: Proceedings Paper
Palavras-chave: Hydrodynamics; Water quality; Channel flow; Development projects; Simulation; Modelling; Flushing; Environmental effects; Water currents; Inland water environment; Hydrodynamics; Http://aims.fao.org/aos/agrovoc/c_3723.
Ano: 2006
URL: http://hdl.handle.net/1834/1473

Análisis de la distribución y dinámica poblacional de lenguados de la Provincia de Buenos Aires (Pisces, Bothidae)
Provedor de dados: 20
Autores: Fabré, N.N.
Los lenguados constituyen un importante recurso pesquero en el Mar Argentino. Más que en los volúmenes desembarcados (9 .731 t en 1991), esta importancia se centra en su elevado valor de comercialización debido a la alta calidad de su carne. Atendiendo a los desembarques totales realizados en el Mercado de Concentración Pesquera de Mar del Plata, los lenguados ocupan el octavo lugar. Estos desembarques están compuestos principalmente por especies de porte mediano a grande pertenecientes al género Paralichthys, y por ejemplares de tamaño mediano o pequeño de las especies Xystreuris rasile, y en menor proporción, Paralichthys isosceles. Este recurso es explotado, en el sector bonaerense, por las flotas de rada o ría y costera, mientras que la flota de altura...
Tipo: Theses and Dissertations
Palavras-chave: Geographical distribution; Population dynamics; Population structure; Growth; Reproduction; Mortality; Environmental effects; Ecosystems; Marine fish.
Ano: 1992
URL: http://hdl.handle.net/1834/5158

Influencia ambiental en la distribución espacial de las clases de edad de pez palo (Percophis brasiliensis) en el Sistema Costero del Atlántico Sudoccidental (34°-41° S)
Provedor de dados: 20
Autores: Barretto, A.C.
The age-class distribution of the Brazilian flathead Percophis brasiliensis in relation to environmental variables in spring and winter, and the growth of both sexes, were studied in the SW Atlantic Coastal System (SACS)(34°S-31° S). Growth was studied from 1449 individuals (n=853, spring (1998 + 2000), n=596, winter (2004)) to which size (TL), sex, and age were determined. Age was determined considering that an opaque plus a hyaline band (present in the transverse section of the sagitta otolith) represented 1 year of life. The age-class distribution in spring and winter was established through hierarchical clustering and non-metric multi-dimensional scaling (nMDS analysis). This analysis grouped sampling stations (n=109, spring 1998; n=160, winter 2004)...
Tipo: Theses and Dissertations
Palavras-chave: Age groups; Age composition; Environmental factors; Geographical distribution; Population structure; Growth; Environmental effects; Coastal waters; Age composition; Environmental factors; Geographical distribution; Population structure; Growth; Age groups; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_28628; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 2007
URL: http://hdl.handle.net/1834/3017

Patrones de distribución de las anomalías de temperatura superficial en el Mar Argentino. Su relación con la distribución de especies de interés comercial
Provedor de dados: 20
Autores: Sanahuja, G.
The present research studies the spatial-temporal distribution patterns of the sea surface temperature anomalies (SSTA) and its relation with some of the most relevant commercial species in the Argentine Sea (SW Atlantic). The analysis is based on a monthly and weekly temporal series of the ATSM data and the sea surface temperature (SST) covering the period of December 1981 through November 2004, using the Reynolds/NCEP database as data source. The spatial scope of the study covers an area from the 33° S to 59° N, and includes the area within the coastal line and the 50 W, including the whole continental shelf, the shelf break zone, and the adjacent oceanic region. In order to assess the consistency of Reynolds/NCEP data for the purposes of this research a...
Tipo: Theses and Dissertations
Palavras-chave: Surface temperature; Temperature anomalies; Temporal variations; Commercial species; Biomass; Environmental effects; Biomass; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2007
URL: http://hdl.handle.net/1834/2562

Tensores naturales y antrópicos al norte de Villa Clara, Cuba; efectos en la producción de ostión (crassostrea rhizophorae, Guilding, 1828)
Provedor de dados: 20
Autores: Betanzos Vega, A.; Arencibia Carballo, G.
Production of mangrove oyster (Crassostrea rhizophorae Guilding, 1828), north of Villa Clara, Cuba Province, tends to decline since 1980, accentuating from 2003 on. Despite regulations to protect the resource, minimum legal size and catch closures, the year 2008 presents the landing smaller volumes of the past 50 years. An analysis of the variability of catches in relation to natural and human factors, allows for precipitating causes of low productivity of this fishery resource; between the most representatives are expanding storage capacity of river water, salinity increment, the increase in frequency and intensity of hurricanes and the mismanagement of the extraction of oyster.
Tipo: Preprint
Palavras-chave: Environmental effects; Fisheries; Fisheries; Http://aims.fao.org/aos/agrovoc/c_2934.
Ano: 2010
URL: http://hdl.handle.net/1834/3531

Evolution de l’activité de pêche en 2009 au PNBA : effets environnementaux, rôles écologiques et socio-économiques
Provedor de dados: 20
Autores: Barham, Cheikh Baye; Yerba, Lemhaba; Sakho, Cheikh Ibrahima; Ahmed Deida, Hadrami.
Tipo: Proceedings Paper
Palavras-chave: Fishing methods; Stock assessment; Environmental effects; Ecology; Socioeconomic aspects.
Ano: 2011
URL: http://hdl.handle.net/1834/4665

Establishment, spread and impact of Neochetina spp. weevils (Coleoptera: Curculionidae) on Water Hyacinth in Lake Victoria, Kenya
Provedor de dados: 20
Autores: Njoka, S.W.; Ochiel, G.S.; Mailu, A.M.; Gitonga, W.
The Kenya Agricultural Research Institute imported 12,300 curculionid weevils (Neochetina spp.) from diverse sources, for biological control of water hyacinth in Lake Victoria, as part of the World Bank-funded Lake Victoria Environmental Management Project in East Africa. In addition to the rearing and quarantine facility at Muguga, a second rearing facility was established in 1996 at Kibos, near Lake Victoria. The Kibos rearing facility and two community rearing facilities at the lakeshores, have produced approximately 100,000 adult weevils and 42,000 weevil eggs over a three-year period. Since January 1997, some 73,500 Neochetina weevils have been released at 29 sites and an additional 10,000 redistributed at several sites. Visual observations and...
Tipo: Proceedings Paper
Palavras-chave: Environmental conditions; Environmental effects; Environmental protection; Inland waters; Biological control; Environmental conditions; Environmental protection; Inland waters; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_15898; Http://aims.fao.org/aos/agrovoc/c_3876; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2001
URL: http://hdl.handle.net/1834/1283

Impact saisonnier de l'environnement sur la structure génétique de trois populations de ruditapes decussatus dans l'ecosystème lagunaire de Bizerte (Tunisie)
Provedor de dados: 20
Autores: Fassatoui, CH.; Mdelgi-Lasram, E.; Moraga, D.; Romdhane, M.S.
في محاولة لتقييم تأثيرالاضطرابات التي يمكن ان تغير التركيبه الجينيه للمحار ببحيره بنزرت، اجريت تحاليل جينيه على عينات من ثلاثة مجموعات. و قد بينت النتائج تواجد علاقة متبادله بين فقدان التنوع ومستويات métallothionéines في خياشيم المحار التي  يمكن ان تكون مرتبطة مع وجود تدرج الانسياب المحمل بالمعادن الثقيلة بين مناطق منزل جميل،فروة والشعرة.
Tipo: Journal Contribution
Palavras-chave: Ruditapes decussatus; Clam culture; Environmental effects; Environmental impact; Heavy metals; Metallothioneins; Population genetics; Toxicity; Environmental impact; Heavy metals; Population genetics; Toxicity; Biomarkers of exposure (organisms); Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_34326; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_36994.
Ano: 2007
URL: http://hdl.handle.net/1834/4258

Cadre de processus:
Provedor de dados: 20
Ce Cadre du Processus (PF) pour le Programme Régional des Pêches pour    L'Afrique de l'Ouest (PRAO) ÉTABLI directives des Nations Unies pour l'Élaboration des FAP nationaux à travers un processus participatif par Lequel Les membres des communautés de pêche locales seront, selon Le Prao, Dans la impliqués    et la mise en oeuvre de la ongestion Conception de la pêcherie locale, tout en    maintenant La durabilité des moyens de subsistance locaux Et ainsi le suivi local    de l'effort de pêche. La délimitation des Territoires pour les Droits d'utilisation des Pêches (DUT) dans les pays participants au PRAO et la mise en oeuvre des restrictions sur    L'utilisation des Ressources Marines constitutifs des impacts sociaux importants Aux termes du OP 4.01, de...
Tipo: Other
Palavras-chave: Fishery disputes; Coastal fisheries; Environmental effects; Financing; Fishery development; Fishery management; Resource management; Fishing effort; Fishermen; Maritime legislation; Financing; Fishery management; Fishermen; Coastal fisheries; Resource management; Fishing effort; Http://aims.fao.org/aos/agrovoc/c_29785; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_2936; Http://aims.fao.org/aos/agrovoc/c_1696; Http://aims.fao.org/aos/agrovoc/c_6524; Http://aims.fao.org/aos/agrovoc/c_24027.
Ano: 2009
URL: http://hdl.handle.net/1834/3675

Integrating Anthropogenic and Climatic Factors in the Assessment of the  Caribbean Spiny Lobster (Panulirus argus) in Cuba: Implications for  Fishery Management
Provedor de dados: 20
Autores: Puga, R.; Piñeiro, R.; Alzugaray, R.; Cobas, L. S.; de León, M. E.; Morales, O.
The Caribbean spiny lobster Panulirus argus, the most valuable Cuban fishery resource, is managed with a set of input  and biological controls. The aim of this study was to integrate  two indices that relates water and nutrients supply and tropical  cyclones activity in the stock assessment, through simultaneous estimation of the parameters of a spawning stock–recruitment  function in a statistical catch-at-age analysis. The population dynamics model allowed estimating key Reference Points for  management at fixed levels of  fishing mortality rate and environmental conditions. The results indicated that the reduction of  recruitment and catches in the Cuban spiny lobster fishery could be a result of synergistic cumulative effects because of the...
Tipo: Journal Contribution
Palavras-chave: Lobster fisheries; Stock assessment; Fishery management; Analysis; Environmental effects.
Ano: 2013
URL: http://hdl.handle.net/1834/5224

El Niño y sus implicaciones sobre el medio ambiente
Provedor de dados: 20
Autores: Espinoza, J.
En este contexto, se reconoce que la prevención es prioritaria por los grandes beneficios sociales y económicos que resultan de una buena y oportuna aplicación de dichas medidas, las cuales como instrumento sustancial deben contar con la información adecuada para los organismos responsables en la toma de decisiones.
Tipo: Journal Contribution
Palavras-chave: El nino phenomena; Environmental effects.
Ano: 1996
URL: http://hdl.handle.net/1834/2224

A drift study of vertical distribution and mortality of Engraulis anchoita eggs and larvae.
Provedor de dados: 20
Autores: Sánchez, R.P.; de Ciechomski, J.D.; Lasta, C.A.; Guerrero, R.A.
Lagrangian changes in distribution and survival within an anchovy egg and larvae patch were studied by means of multiple opening/closing sampling following a free drifting buoy. The buoy was equipped with a radar reflector and flashing light, and it was connected to a current cross drogue floating at 15 m depth, which corresponded to the main egg and larvae concentration within the patch. The drifter was launched on the Buenos Aires continental shelf, off Necochea during the spring spawning peak of 1983. Three discrete depths (within, below and above the thermocline)were repeatedly sampled close to the drogue with a Motoda sampler. Egg and larval abundances in the vicinity of the drogue were monitored at 3/4 hour intervals for a period of three days. Each...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Fish eggs; Vertical migrations; Feeding; Environmental effects; Ichthyoplankton surveys; Vertical distribution; Survival; Abundance; Drifting data buoys; Fishery surveys; Feeding; Fish larvae; Survival; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 1999
URL: http://hdl.handle.net/1834/1871

Union des Comores - United Nations Framework Convention on Climate Change: Initial National Communication on Climate Change.
Provedor de dados: 20
The studies made in the context of this Initial National Communication on Climate Change are based on the findings of the Intergovernmental Panel on Climate Change (IPCC) 1 study on impacts and adaptation of Indian Ocean small island states. Changes in climate to be anticipated in Comoros by year 2050 are estimated to be a raise in mean annual air temperature to an average of 28°C, a change that represents a 1°C increase compared to the current situation. A sea level increase of 4 mm/year for a total increase of 20 cm by 2050 is also expected. Expected impacts are the intrusion of salted water in the coastal aquifers; an increase in the occurrence of malaria and of collective food poisoning resulting from consumption of marine animals 2; a decrease in crop...
Tipo: Working Paper
Palavras-chave: Environmental effects; Climate change; Http://aims.fao.org/aos/agrovoc/c_35367.
Ano: 2002
URL: http://hdl.handle.net/1834/643

Morphotypes, structure trophique et état de maturité de la nématofaune de la lagune de Bizerte
Provedor de dados: 20
Autores: Mahmoudi, E.; Beyrem, H.; Boufahja, F.; Essid, N.; Hedfi, A.; Aissa, P.
Dix stations côtières ont été prospectées dans la lagune de Bizerte en hiver 2001 pour étudier l’impact des conditions environnementales sur les plans morphométrique, trophique et de maturité des nématodes méiobenthiques. Nos résultats montrent que la croissance en largeur des nématodes libres a été proportionnelle aux charges sédimentaires en fraction fine et en métaux et ce parallèlement à l’individualisation de quatre morphotypes nématologiques. D’autre part, la structure trophique de la nématofaune est liée à la turbidité et aux concentrations des eaux en nitrites. En effet, la proportion en détritivores sélectifs, principalement bactériophages, au sein des communautés nématologiques, est positivement corrélée à la concentration des eaux en nitrites et...
Tipo: Journal Contribution
Palavras-chave: Environmental effects; Feed composition; Indicator species; Pollution monitoring; Sedimentation; Sexual maturity; Turbidity; Nematoda; Environmental impact; Http://aims.fao.org/aos/agrovoc/c_5112; Http://aims.fao.org/aos/agrovoc/c_24420.
Ano: 2006
URL: http://hdl.handle.net/1834/4156

The effect of water Hyacinth, Eichhornia Crassipes, infestation on phytoplankton productivity in Lake Naivasha and the status of control
Provedor de dados: 20
Autores: Mironga, John Momanyi.
The paper presents data collected in an assessment of effects of water hyacinth infestation on phytoplankton productivity in Lake Naivasha, Kenya. A summary of the status of control and strategies for the future is given. The ecological effects of water hyacinth, Eichhornia Crassipes, on Lake Naivasha have received little attention compared to the large body of work available on the weed’s socioeconomic impact on the country’s water ways and methods for its removal. This study was conducted to determine if water hyacinth infestation in Lake Naivasha affects phytoplankton productivity. Several sampling stations were set up in the lake at sites where the floating mats of the weed were present and sites where the weed was absent. Phytoplankton chlorophyll-a...
Tipo: Proceedings Paper
Palavras-chave: Aquatic plants; Freshwater weeds; Infestation; Primary production; Ecological crisis; Environmental effects; Check lists; Species diversity; Phytoplankton; Socioeconomic aspects; Biodiversity; Community composition; Primary production; Aquatic plants; Species diversity; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_559; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2006
URL: http://hdl.handle.net/1834/1497

Estructura poblacional del gatuzo (Mustelus shmitti) en la costa bonaerense y uruguaya asociada a condiciones oceanográficas.
Provedor de dados: 20
Autores: Massa, A.M.
The gatuzo, Mustelus schmitti, lives in the Southamerican Atlantic coastal waters from up to 23°S (Brazil)down to 47°S (Argentine), and is the greatest species of the Bonaerense and North Patagonian shores. This species is the most exploited elasmobranch of this region, within the last six years catch has exceeded 10,000 t per year and it is vulnerable to overexploitation due to reproductive aspects, with a low rate of changes, as well as distribution patterns. In order to relate size distribution and nursery areas, and environmental temperature and salinity variability, were obtained within six INIDEP 'Coastal Project' research cruises from 34° to 42°S from boundaries to 50 mts isobaths, during the spring seasons between 1994 to 1997. Cluster analysis...
Tipo: Theses and Dissertations
Palavras-chave: Size distribution; Age composition; Sex ratio; Growth curves; Environmental effects; Brackishwater environment; Age composition; Sex ratio; Brackishwater environment; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_1050.
Ano: 1998
URL: http://hdl.handle.net/1834/3584

Importance des saisons de transition hydrologique et impact des anomalies climatiques sur l'activité d’une flottille pélagique en ZEE mauritanienne 1985 – 1987
Provedor de dados: 20
Autores: Chavance, P.; Loktionov, Y.; Mahfoudh, M.
Tipo: Journal Contribution
Palavras-chave: Catch/effort; Condition factor; Environmental effects; Environmental impact; Fishery resources; Fishing fleet; Pelagic fisheries; Seasonal distribution; Seasonal variations; Temperature effects; Temporal variations; Upwelling; Environmental impact; Fishery resources; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 1989
URL: http://hdl.handle.net/1834/1144

Nigeria’s First National Communication. Under the United Nations Framework Conventin on Climate Change.
Provedor de dados: 20
Nigeria with a total area of 923,800 sq km occupies about 14% of land area in West Africa. The country lies between 4oN and 14oN, and between 3oE and 15oE. It is bordered respectively in the north, east, and west by Niger, the Cameroon, and Benin Republic, while the Gulf of Guinea, an arm of the Atlantic Ocean, forms the southern border. Most of Nigeria is covered with Pre- Cambrian rocks, but there are also metamorphic and sedimentary rocks of Eocene times as well as volcanic rocks. In general, three types of geologic structures exist in Nigeria, namely, areas of uplift, basins of sedimentation, and isolated volcanic areas. The areas of uplift are made up of the oldest rocks in Nigeria - the basement complex rocks. The basins of sedimentation are the...
Tipo: Report
Palavras-chave: Environmental effects; Climate change; Http://aims.fao.org/aos/agrovoc/c_35367.
Ano: 2003
URL: http://hdl.handle.net/1834/794

Degradation of the riparian wetlands in the Lake Victoria basin - Yala swamp case study
Provedor de dados: 20
Autores: Thenya, Thuita; Wassmann, Reiner; Verchot, Louis; Mungai, David.
Land degradation is as a result of broad range of scales and factors, which include biophysical, climatic, demographic and socio-economic. The aim of this paper was to provide an analysis of wetland utilisation, ecosystem degradation and their effect on the Lake Victoria (Kenya) ecosystem. This involved analysis of socioeconomic and remote sensed data. The main sources of wetland degradation in the Lake Victoria basin were identified as (1) farming activities, (2) grazing and macrophyte harvesting and (3) coupled with catchment degradation-deforestation. These factors were closely related to the demographic dynamics and unsustainable land utilisation practices. Socio-economic data provided valuable insight on the pattern of wetland utilisation and possible...
Tipo: Proceedings Paper
Palavras-chave: Riparian environments; Degradation; Wetlands; Inland waters; Catchment area; Remote sensing; Environmental effects; Socioeconomic aspects; Resource development; Sediment transport; Silting; Water pollution; Wetlands; Deforestation; Natural resources; Utilization; Land use; Pollutants.
Ano: 2006
URL: http://hdl.handle.net/1834/5313

Efectos de temperatura y salinidad sobre el crecimiento de juveniles de besugo Pagrus pagrus (Linné,1758)(Actinopterygii; Perciformes) en sistemas de recirculación cerrada
Provedor de dados: 20
Autores: Suárez, J.
The growth and survival of juvenile red porgy, Pagrus pagrus, reared in captivity (mean body weigth 81.0 not equal to 37.24g), exposed to two different temperatures (18 degree and 22 degree C)and three salinities (21, 27 and 33 psu)during a 30 day period, were studied. Final survival rate was 100. in all treatments. The highest growth rate was reached at 18 degree C/33 psu with a value of 1.07 /day. There was an inverse trend in the growth rate between the two temperatures. Food consumption increased with the increase of salinity and temperature. The highest food consumption rate was 1.17. (18 degree C/33 psu). The relationships between protein efficiency ration (PER)and salinity were positive at 18 degree C and negative at 22 degree C. The highest values...
Tipo: Theses and Dissertations
Palavras-chave: Environmental effects; Fish culture; Food consumption; Growth; Juveniles; Recirculating systems; Survival; Marine aquaculture; Fish culture; Food consumption; Growth; Juveniles; Survival; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 2004
URL: http://hdl.handle.net/1834/2601

Mundo Azul
Provedor de dados: 20
Autores: Diez de Oñate, G.; Diez de Oñate, G.
Formación del universo, la vida en el mar, las mareas y otros temas escritos de forma didáctica y con abundantes ilustraciones.
Tipo: Other
Palavras-chave: 1108; Education; Environment management; Environmental assessment; Environmental impact; Aquatic environment; Environmental conditions; Environmental effects; Education; Environmental impact; Environmental assessment; Aquatic environment; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_2488; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_37751; Http://aims.fao.org/aos/agrovoc/c_554; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2001
URL: http://hdl.handle.net/1834/3994

Effects of land use changes on bird composition along River Njoro: A watershed of Lake Nakuru
Provedor de dados: 20
Autores: Shivoga, W.A.; Ngugi, F.M.; Muchiri, M.S.; Miller, S.N.
The rift valley lakes and their associated watersheds are home for millions of resident and migratory waterfowl. However, they have been recently challenged by land use changes. Lake Nakuru (Kenya) supports diverse biological resources of global, regional and national importance. It is saline and River Njoro is its main source of freshwater. Deforestation, cultivation and urbanization in vital watershed areas have altered the hydrological regime of River Njoro. There is need to preserve and restore aquatic, riparian and terrestrial biological diversity in the watershed to be able to restore and maintain ecological health of Lake Nakuru. The impact of these recent land use changes on birds in the River Njoro Watershed is of concern to conservationists. This...
Tipo: Proceedings Paper
Palavras-chave: Land use; Aquatic birds; Urbanization; Resource conservation; Resource management; Migratory species; Environment management; Protected resources; Watersheds; Lake basins; Inland waters; Environmental effects; Species diversity; Riparian environments; Aquatic birds; Urbanization; Resource conservation; Resource management; Http://aims.fao.org/aos/agrovoc/c_8898; Http://aims.fao.org/aos/agrovoc/c_8088; Http://aims.fao.org/aos/agrovoc/c_6523; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2006
URL: http://hdl.handle.net/1834/1499

Environmental water needs and impacts of irrigated agriculture in river basins:  A framework for a new research program
Provedor de dados: 31
Autores: Smakhtin,   Vladimir U.
Tipo: Working or Discussion Paper
Palavras-chave: Water resource management; Water conservation; Irrigated farming; River basins; Environmental effects; Ecosystems; Water requirements; Water allocation; Catchment areas; Lagoons; Wetlands; Environmental Economics and Policy; Farm Management; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/92695

Integrated management of water, forest and land resources in Nepal: Opportunities for improved livelihood
Provedor de dados: 31
Autores: Pant,   Dhruba; Thapa,   Sabita; Singh,   Ashok; Bhattarai,   Madhusudan; Molden,   David J.
Tipo: Working or Discussion Paper
Palavras-chave: Irrigation management; Forest management; Public policy; Land use; Land tenure; Farm size; Environmental effects; Gender; Women; Equity; Institutions; Conflict; Environmental Economics and Policy; Farm Management; Institutional and Behavioral Economics; Land Economics/Use; Public Economics.
Ano: 2005
URL: http://purl.umn.edu/92405

Strategic Analyses of the National River Linking Project (NRLP) of India, Series 2; Proceedings of the Workshop on Analyses of Hydrological, Social and Ecological Issues of the NRLP
Provedor de dados: 31
Tipo: Conference Paper or Presentation
Palavras-chave: River basin development; Development projects; Irrigation programs; Hydrology; Erosion; Water transfer; Cost benefit analysis; Groundwater irrigation; Dams; Environmental effects; Water storage; Crop management; Livestock; Gender; Rainfed farming; Supplemental irrigation; Water harvesting; Artificial recharge; Water market; Simulation models; Water allocation; Case studies; Livestock Production/Industries; Production Economics; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/118387

Environmental Benefits from Reduced Pesticide Use and Returns to Research: An Application to the U.S. Cotton Industry
Provedor de dados: 31
Autores: Sande,   Doris N.; Mullen,   Jeffrey D.; Matekole,   Augustus N.
Cotton production is one of the main pesticide use industries in the U.S. This intensive use has resulted in the disruption of naturally occurring biological control factors that regulate other insect pest populations and “the pesticide treadmill”. The result is resistance to insecticides, high control costs and unacceptable levels of chemical insecticides in the environment. Concerns about the environmental and human health effects from pesticide use thus need to be modeled in evaluation studies.
Tipo: Conference Paper or Presentation
Palavras-chave: Cotton; Pesticide use; Environmental effects; Supply function; Crop Production/Industries; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/56549

Impact of irrigation on poverty and environment in Ethiopia. Draft Proceeding of the Symposium and Exhibition held at Ghion Hotel, Addis Ababa, Ethiopia 27th -29th November, 2007
Provedor de dados: 31
Autores: Awulachew,   Seleshi Bekele; Loulseged,   Makonnen; Yilma,   Aster Denekew.
Tipo: Presentation
Palavras-chave: Poverty; Crop management; Irrigated farming; Rainfed farming; Irrigation systems; Food security; Water harvesting; Institutions; Environmental effects; Public health; Malaria; GIS; Remote sensing; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; Institutional and Behavioral Economics; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/118410

Cities versus agriculture: Revisiting intersectoral water transfers, potential gains and conflicts
Provedor de dados: 31
Autores: Molle,   Francois; Berkoff,   Jeremy.
Tipo: Report
Palavras-chave: Water scarcity; Water demand; Water transfer; Water use; Water supply; Water allocation; Environmental effects; Water market; Community/Rural/Urban Development; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Land Economics/Use; Production Economics; Productivity Analysis; Risk and Uncertainty.
Ano: 2006
URL: http://purl.umn.edu/91817

Integrated development and management of water resources for productive and equitable use in the Indrawati River Basin, Nepal
Provedor de dados: 31
Autores: Bhattarai,   Madhusudan; Pant,   Dhruba; Mishra,   V.S.; Devkota,   Hari; Pun,   Shuku; Kayastha,   R.N.; Molden,   David J.
Tipo: Working or Discussion Paper
Palavras-chave: River basin development; Water transfer; Water rights; Water supply; Water demand; Water balance; Environmental effects; Social aspects; Development projects; Non-governmental organizations; Villages; Water users associations; Conflict; Farmers; Environmental Economics and Policy; Farm Management; Institutional and Behavioral Economics; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/92699

Rethinking agriculture in the Greater Mekong Subregion: how to sustainably meet food needs, enhance ecosystem services and cope with climate change
Provedor de dados: 31
Autores: Johnston,   Robyn M.; Hoanh,   Chu Thai; Lacombe,   Guillaume; Noble,   Andrew D.; Smakhtin,   Vladimir U.; Suhardiman,   Diana; Kam,   Suan Pheng; Choo,   Poh Sze.
Tipo: Report
Palavras-chave: Agricultural production; Rice; Fisheries; Livestock; Farming systems; Coastal area; Flood plains; Climate change; Environmental effects; Food production; Ecosystems; Water management; South East Asia; Greater Mekong Subregion; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Financial Economics; Food Consumption/Nutrition/Food Safety; Land Economics/Use; Production Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2010
URL: http://purl.umn.edu/91465

Research, development and capacity building for the sustainability of dam development with special reference to the Bui Dam Project
Provedor de dados: 31
Autores: Raschid-Sally,   Liqa; Twum-Korangteng,   Richard; Akoto-Danso,   Edmund Kyei.
Issue paper prepared for the Ghana Dams Forum February 2008
Tipo: Report
Palavras-chave: Dams; Reservoirs; Development projects; Water power; Electrical energy; Electricity supplies; Environmental effects; Social impact; Institutions; Ghana; Bui Dam Project; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Production Economics; Productivity Analysis.
Ano: 2008
URL: http://purl.umn.edu/91815

Assessing irrigation performance with comparative indicators:  The case of the Alto Rio Lerma Irrigation District, Mexico
Provedor de dados: 31
Autores: Kloezen,   Wim H.; Garces-Restrepo,   Carlos.
Describes and evaluates the application of IWMI's minimum set of performance indicators to the Alto Rio Lerma Irrigation District, and compares this with the application of a small set of process performance indicators.
Tipo: Report
Palavras-chave: Irrigation management; Irrigation scheduling; Water allocation; Water distribution; Case studies; Institutional constraints; Operation; Monitoring; Indicators; Performance indexes; Water rights; Economic aspects; Data collection; Environmental effects; Performance evaluation; Water use efficiency; Crop Production/Industries; Institutional and Behavioral Economics; Production Economics.
Ano: 1998
URL: http://purl.umn.edu/44580

Modelling regional maize market and transport distances for biogas production in Germany
Provedor de dados: 31
Autores: Delzeit,   Ruth; Britz,   Wolfgang; Holm-Muller,   Karin.
Our location model aims to simulate location decisions for biogas plants based on profit maximisation to generate regional demand functions for maize and corresponding plant size structure and transport distances. By linking it with an agricultural sector model we derived regional maize markets. Comparing results for the REA with a scenario applying uniform per unit subsidy and producing the same energy, we see higher subsidy costs with the REA but lower transportation distances.
Tipo: Conference Paper or Presentation
Palavras-chave: Biogas; Environmental effects; Transport costs; Choice of location; Agricultural Finance; Environmental Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/53258

Water management in the Yellow River Basin: Background, current critical issues and future research needs
Provedor de dados: 31
Autores: Giordano,   Mark; Zhu,   Zhongping; Cai,   Ximing; Hong,   Shangchi; Xue,   Yunpeng; Zhang,   Xuecheng.
Tipo: Report
Palavras-chave: River basin development; Water management; Water use; History; Water stress; Water scarcity; Flood water; Soil conservation; Policy; Water quality; Environmental effects; Water conservation; Irrigation water; Pollution control; Environmental Economics and Policy; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2004
URL: http://purl.umn.edu/92826

Health impacts of small reservoirs in Burkina Faso.
Provedor de dados: 31
Autores: Boelee,   Eline; Cecchi,   Philippe; Kone,   Andre.
In Burkina Faso, at least 1,700 small reservoirs have been constructed, most of them during the last 30 years. Numerous and scattered, these beneficial multipurpose systems combine productive with domestic water uses. However, their environmental and health impacts remain insufficiently documented. This report combines data from different sources into syntheses and national maps, with a focus on water-related diseases. The mitigation of negative impacts requires an integrated approach to specifically identify the enhancing and limiting factors that influence environmental impacts and the transmission of diseases around reservoirs. Public awareness campaigns need to accompany the promotion of preventive and curative measures and the development of...
Tipo: Working or Discussion Paper
Palavras-chave: Reservoirs; Health hazards; River basins; Water resources development; Environmental effects; Waterborne diseases; Malaria; Schistosomiasis; Control methods; Water policy; Environmental Economics and Policy; Health Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/91869

The Resource and Agricultural Policy System (RAPS): Upgrade and Documentation
Provedor de dados: 31
Autores: Wu,   JunJie.
The Resource and Agricultural Policy System (RAPS) is upgraded and documented in this technical report. RAPS was developed to estimate the environmental impacts of farming practices and policy in 128,591 National Resources Inventory (NRI) sites in the Central United States (the Corn Belt, Lake States, and Northern Plains). This modeling system integrates the effects of soils, climate, crops, and management practices on several environmental indicators including nitrate runoff and leaching, pesticide runoff and leaching, water and wind erosion, and soil organic carbon. RAPS can be used to provide timely information on the nation's environmental health as it is impacted by agriculture and by changes in agricultural and resource policies.
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural policy; Carbon sequestration; Conservation practices; Environmental effects; Integrated modeling systems; Nitrate water pollution; Soil erosion; Agricultural and Food Policy.
Ano: 2000
URL: http://purl.umn.edu/18654

Hydrological and environmental issues of interbasin water transfers in India: a case of the Krishna River Basin
Provedor de dados: 31
Autores: Smakhtin,   Vladimir U.; Gamage,   Nilantha; Bharati,   Luna.
Tipo: Report
Palavras-chave: River basins; Water transfer; Environmental effects; Dams; Reservoirs; Water resources development; Irrigation requirements; Case studies; India; Krishna River; Godavari River; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/53065

Minimizing the negative environmental and health impacts of agricultural water resources development in Sub-Saharan Africa
Provedor de dados: 31
Autores: McCartney,   Matthew P.; Boelee,   Eline; Cofie,   Olufunke O.; Mutero,   Clifford M.
This paper provides a synopsis of environmental and health impacts arising from agricultural water development in sub-Saharan Africa and recommends ways to increase the sustainability of investments in irrigation by giving greater prominence to health and environmental concerns. In many places in the region, irrigation is a key means of enhancing agricultural productivity that can reduce poverty and improve livelihoods. However, failure to adequately foresee, plan and manage the negative environmental and health impacts arising from irrigation undermines the sustainability of many schemes and can worsen poverty. To improve sustainability, environmental and health issues must be at the core of future irrigation development with much greater emphasis on the...
Tipo: Working or Discussion Paper
Palavras-chave: Water resources development; Irrigation management; Investment; Environmental effects; Public health; Risk management; Environmental Economics and Policy; Health Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/91873

Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
Provedor de dados: 96
Autores: Toral,Fábio Luiz Buranelo; Torres Júnior,Roberto Augusto de Almeida; Lopes,Paulo Sávio; Silva,Luiz Otávio Campos da; Reis Filho,João Cruz.
The objective of this study was to evaluate alternatives for modeling the age of dam at calving (AOD) effect on the weaning weight of Charolais-Zebu crossbred calves. Data from 56,965 calves were analyzed, using statistical models considering the fixed effects of the contemporary groups, sire and dam genetic groups, and AOD. The AOD effect was fitted to models using annual age classes, and ordinary quadratic to quintic-ordered polynomials (OP) or segmented polynomials (SP) with two, three, four, six and twelve evenly spaced intervals. In the case of segmented polynomials, general linear and quadratic effects and only one quadratic additional term from each knot were considered. The AOD effects were nested within sex of calf in all cases. According to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Environmental effects; Genetic evaluation; Least square.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700011

Effects of environmental factors on multiple ovulation of zebu donors
Provedor de dados: 45
Autores: Peixoto,M.G.C.D.; Bergmann,J.A.G.; Fonseca,C.G.; Penna,V.M.; Pereira,C.S.
Data on 1,294 superovulations of Brahman, Gyr, Guzerat and Nellore females were used to evaluate the effects of: breed; herd; year of birth; inbreeding coefficient and age at superovulation of the donor; month, season and year of superovulation; hormone source and dose; and the number of previous treatments on the superovulation results. Four data sets were considered to study the influence of donors’ elimination effect after each consecutive superovulation. Each one contained only records of the first, or of the two firsts, or three firsts or all superovulations. The average number of palpated corpora lutea per superovulation varied from 8.6 to 12.6. The total number of recovered structures and viable embryos ranged from 4.1 to 7.3 and from 7.3 to 13.8,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Zebu; Superovulation; Environmental effects; MOET nucleus.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000400019

Intra- and inter-annual changes in the condition factors of three Curimatidae detritivores from Amazonian floodplain lakes
Provedor de dados: 49
Autores: Correia,Gisele Batista; Siqueira-Souza,Flávia Kelly; Freitas,Carlos Edwar de Carvalho.
The flood pulse is a key factor that drives the biota of large rivers with adjacent floodplains, but the direction and intensity of its effects are not uniform for all trophic guilds of fish. In this study, we tested the existence of intra- and inter-annual changes in the relative condition factors (kn) of three Curimatidae: Potamorhina altamazonica, Potamorhina latior, and Psectrogaster rutiloides. We used weight and length data from fish that were caught in eight floodplain lakes of the Rio Solimões. These data were from experimental fisheries during each season of the hydrological cycle: flooding, flood, drying, and dry from 2004, 2005, and 2006. In general, there are similar patterns of intra-annual changes for these three species, with the highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weight-length relationship; Curimatidae; Environmental effects; Relative condition factor; Floodplain lakes.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000400101