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Registros recuperados: 47
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Variacao estacional da dieta de bovinos em vegetacao arbustiva no Sudeste do Arizona. Repositório Alice
SOARES, J. G. G.; SMITH, E. L..
O conhecimento dos diversos componentes da dieta de animais atraves das diferentes estacoes do ano e essencial para se estabelecer o manejo adequado das pastagens nativas. Em Safford, no sudeste do Arizoan,USA, um estudo foi conduzido por um periodo de um ano, comecando em junho de 1979, com o objetivo de se determinar a composicao botanica e a variacao da dieta de bovinos em tres diferentes areas de vegetacao arbustiva. A identificacao dos componentes da dieta foi feita pelo metodo de analise microhistologica de fezes. Nas tres areas denominadas "Whitehouse", "Creosote" e "Van Gausig", foram coletadas amostras das especies vegetais para o preparo do material de referencia, e, mensalmente, amostras de fezes em tres locais de cada area. Na area...
Tipo: Parte de livro Palavras-chave: Vegetacao arbustiva; Estados Unidos; Sudeste; Scrub; Bovino; Dieta; Variação Sazonal; Arizona; United States; Cattle; Diet; Seasonal variation; Vegetation.
Ano: 1981 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/133396
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Dairy Product Manufacturing Costs at Cooperative Plants AgEcon
Ling, K. Charles.
Cost data are summarized for 14 plants manufacturing cheese, butter, and powder and average costs are presented for each product. Average cost curves are estimated for each plant. The scale of plant for least-cost operations is identified for plants of each product type. Plant capacity utilization and seasonal volume variation and their impacts on manufacturing cost are delineated.
Tipo: Report Palavras-chave: Cooperatives; Dairy; Average cost curve; Productivity; Capacity utilization; Seasonal variation; Economies of scale; Agribusiness.
Ano: 1983 URL: http://purl.umn.edu/51567
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Effect of the density of the culture and the depth on the seasonal variation of the biochemical composition of Crassostrea virginica in patuxent river (Chesapeake Bay) ArchiMer
Prou, Jean; Heral, Maurice; Goulletquer, Philippe; Forget, Maïté; Bougrier, Serge; Razet, Daniel.
The project of cultivation of oyster has been designed to evaluate the growth rate, the mortality, the reproductive effort, production and biochemical composition of the oyster function of the density and the depth. This plan was intended: - to build model of growth rate, - to demonstrate the action of the different parameters on growth rate (temperature, food effect...), - to evaluate the density effect to see if the available food could be a limiting factor, - to estimate the effect of the depth joined to the impact of the high turbidity near the bot tom, - to detect the mortality related to the prevalence of diseases. The project began in July 1989 by dredging 20 000 small oysters at the mouth of the Patuxent River near Cove Point. Three experimental...
Tipo: Text Palavras-chave: Physiology; Seasonal variation; Biochemical composition; Density; Crassostrea virginica; Cheseapeake Bay.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00200/31104/29503.pdf
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Insetos capturados com armadilha Malaise na Ilha do Mel, Baía de Paranaguá, Paraná, Brasil: I. composição de ordens Zoologia
Dutra,Renato R.C.; Marinoni,Renato C..
Two Malaise traps (TOWNES 1972 model) were installed on an island (the "Ilha do Mel") in the Bay of Paranaguá, from September, 1988 to August, 1989. at two sites denominated "Fortaleza" and "Praia Grande", for collection of insects. Apart from collection of insects (Fortaleza: 62.924 individuals; Praia Grande: 38.868 individuais), graphical analysis were limited to those Orders wich occurred concomitantly at the two collection points in ali months: Collembola. Hemiptera. Homoptera. Coleoptera. Lepidoptera. Diptera and Hymenoptera. It was concluded that the Malaise trap is selective for Diptera. Hymenoptera and Lepidoptera. and proved to be efficient in measuring abundance, in obtaining information regarding the seasonal variation of insects, and in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insect survey; Paraná; Seasonal variation.
Ano: 1994 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751994000200006
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Fujimaki et al. "Breeding biology of the Stonechat in southeastern Hokkaido, Japan"に関する一考察III : 可変育雛期間のモデル OAK
楠田, 尚史; KUSUDA, Hisafumi.
Palavras-chave: ノビタキ; 繁殖生態; 育雛日数; 季節変動; Forward iteration; Stonechat; Breeding biology; Fledging period; Seasonal variation.
Ano: 1997 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1320
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Dieta de um grupo de mico-leão-preto, Leontopithecus chrysopygus (Mikan) (Mammalia, Callitrichidae), na Estação Ecológica dos Caetetus, São Paulo Zoologia
Passos,Fernando de Camargo.
In this study carried out in the Caetetus Ecological Station, Sao Paulo, southeastern Brazil, a wild group of black lion tamarins was accompanied during 1989 to 1991, to analyse the dietary habits of the species. The scan sampling method was used to gather data. A total of 961 behaviors were recorded, of which feeding occupied 23.3% of the time involved in the behaviors. The major dietary components observed in the black lion tamarins were fruits, tree exudates and animal preys (67.9%, 22.8% and 8.9% respectively). Fruits varied monthly from 47.4 to 97.1 %, being consumed more during the rainy season, while tree exudates varied from 0 to 54.7%, and were consumed mainly during the dry season. The animal prey accounted for 0 to 15.8% of the diet. The most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Callitrichidae; Diet; Feeding behavior; Seasonal variation; Black lion tamarin.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000500019
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Seasonal variation of nutrients and energy in tambaqui's (Colossoma Macropomum Cuvier, 1818) natural food BJB
SILVA,J. A. M. da; PEREIRA-FILHO,M.; OLIVEIRA-PEREIRA,M. I. de.
The aim of this study was to evaluate the importance of fruits and seeds as food items in the natural diet of the tambaqui (Colossoma macropomum). During one year, tambaqui's stomach contents were collected, and their nutritional and energetic values were determined. During the flooding period, and while the river water was rising, which coincided with a high availability of fruits and seeds, the protein content of food was low (11%-15% of dry matter basis), whereas in the dry season, when tambaqui fed mainly zooplankton, there was a high protein content (45%-57% of dry matter basis). Lipid, carbohydrate, crude fiber, ash and gross energy contents of the diet varied depending on the river water level and the food items ingested.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tambaqui; Colossoma macropomum; Stomach content; Seasonal variation; Nutritional; Value.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400009
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Three-year study to assess human enteric viruses in shellfish ArchiMer
Le Guyader, Soizick; Haugarreau, Larissa; Miossec, Laurence; Dubois, Eric; Pommepuy, Monique.
The main pathogenic enteric viruses able to persist in the environment, such as hepatitis A virus (HAV), Norwalk-like virus (NLV), enterovirus (EV), rotavirus (RV), and astrovirus (AV), were detected by reverse transcription-PCR and hybridization in shellfish during a 3-year study. Oyster samples (n = 108), occasionally containing bacteria, were less frequently contaminated, showing positivity for AV (17%), NLV (23%), EV (19%), and RV (27%), whereas mussel samples, collected in areas routinely impacted by human sewage, were more highly contaminated: AV (50%), HAV (13%), NLV (35%), EV (45%), and RV (52%). Sequences obtained from HAV and NLV amplicons shelved a great variety of strains, especially for NLV (strains close to Mexico, Snow Mountain Agent, or...
Tipo: Text Palavras-chave: Molecular technique; Seasonal variation; Human pathology; Viral contamination; Shellfish; Enteric virus.
Ano: 2000 URL: https://archimer.ifremer.fr/doc/00507/61879/65953.pdf
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Three-year study to assess human enteric viruses in shellfish ArchiMer
Le Guyader, Soizick; Haugarreau, Larissa; Miossec, Laurence; Dubois, Eric; Pommepuy, Monique.
The main pathogenic enteric viruses able to persist in the environment, such as hepatitis A virus (HAV), Norwalk-like virus (NLV), enterovirus (EV), rotavirus (RV), and astrovirus (AV), were detected by reverse transcription-PCR and hybridization in shellfish during a 3-year study. Oyster samples (n = 108), occasionally containing bacteria, were less frequently contaminated, showing positivity for AV (17%), NLV (23%), EV (19%), and RV (27%), whereas mussel samples, collected in areas routinely impacted by human sewage, were more highly contaminated: AV (50%), HAV (13%), NLV (35%), EV (45%), and RV (52%). Sequences obtained from HAV and NLV amplicons shelved a great variety of strains, especially for NLV (strains close to Mexico, Snow Mountain Agent, or...
Tipo: Text Palavras-chave: Molecular technique; Seasonal variation; Human pathology; Viral contamination; Shellfish; Enteric virus.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-1363.pdf
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Structure and Dynamics of Fish Assemblages in a Tidal Creek Environment BABT
Vendel,Ana Lúcia; Spach,Henry Louis; Lopes,Sabine Granado; Santos,César.
Studies were carried out on structure and dynamics of fish assemblages in the Baguaçu tidal creek, Paranaguá Bay, Brazil. A total of 30,104 fish were captured, comprising 21 families and 47 species. Both in weight and in number, the species Anchoa parva prevailed. Monthly captures in number and weight were largest in the autumn and part of the winter. No seasonal tendency was observed in the indexes of community structure. The dendrogram produced by the classification of the samples separated the 12 months of collection into three groups, reflecting differences in the qualitative and quantitative occurrences of the most important taxa. Some ecological likeness, not only seasonal patterns of abundance, seemed evident in the seasonality of the groupings of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tidal creek; Fish assemblages; Seasonal variation; Brazil.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300015
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Fish assemblages in a tidal flat BABT
Vendel,Ana Lúcia; Lopes,Sabine Granado; Santos,César; Spach,Henry Louis.
Studies were carried out on fish assemblages in a tidal flat. Samples were obtained monthly at low tide of the half moon in the tidal flat of Paranaguá Bay, Brazil, with two seine nets, one with a 1 mm mesh, 30 m in length and 3 m in height and another with a 10 mm mesh, 65 m in length and 2 m in height. A total of 8,890 fish were captured, comprising 24 families and 53 species. The most abundant species were Harengula clupeola and Atherinella brasiliensis, which represented 63.4% of the total, capture. A seasonal tendency was observed in the abundance of fishes, with less fishes being captured during winter and part of spring. The number of species showed a seasonal pattern, with the gradual decrease through winter and a marked increase in summer. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tidal flat; Fish assemblages; Seasonal variation; Brazil.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200015
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Characterization of summer mortalities of C. gigas oyster in France in relation to environmental parameters ArchiMer
Soletchnik, Patrick; Ropert, Michel; Bedier, Edouard; Costil, K. S.; Dubois, Brice; Degremont, Lionel; Bouget, Jean-francois; Martin, Jean-louis; Enriquez-diaz, M.; Faury, Nicole; Le Moine, Olivier; Renault, Tristan; Gagnaire, Beatrice; Huvet, Arnaud; Moal, Jeanne; Samain, Jean-francois.
Field characterization of summer mortality was performed in France in the frame of the Morest project. Natural and hatchery spat were compared between three oyster production areas in France. Regardless of the natural or hatchery origin, oysters died during the reproduction period after temperature reaches 19 degree C. Thus, in southern areas, temperature accelerated gametogenesis of small spat (10mm) as well as adults, and mortality appeared for the two age classes. In contrast, sexual maturation proceeded more slowly in northern where spat mortality was lower compared to 18 months old oysters. However, critical gametogenesis and temperature were not sufficient to induce mortalities, as observed in examples with stable environment. Alternatively sediment...
Tipo: Text Palavras-chave: Seasonal variation; Oyster culture; Mortality causes; Hatcheries; Gametogenesis; Environmental factors; Crassostrea gigas; Oysters.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/acte-3348.pdf
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Padrões temporais na assembléia de peixes na gamboa do Sucuriú, Baía de Paranaguá, Brasil Zoologia
Spach,Henry Louis; Santos,Cesar; Godefroid,Rodrigo Santiago.
The ichthyofauna of a tidal creek in Rasa da Cotinga Island, Paranaguá Bay, Paraná was studied through monthly collections in the quadrature high and low tides, with seine net of 30 m x 1.5 m and 10 mm mesh and "fyke" net of 30 m x 1.5 m with 10 mm mesh in the wings and 8 mm mesh in the bag. Together with the nekton sampling, temperature, salinity and water transparency values were also obtained as well as current speed. A total of 9068 fish belonging to 54 species and 23 families were collected. The ichthyofauna was dominated by Harengula clupeola (Cuvier, 1829), Atherinella brasiliensis (Quoy & Gaimard, 1825), Sphoeroides greeley (Gilbert, 1900) and Sphoeroides testudineus (Linnaeus, 1758), that contributed to 66.1% of the capture in number and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish fauna; Seasonal variation; Mangrove.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000400005
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Seasonal variation in fish larvae at the entrance of Guanabara Bay, Brazil BABT
Castro,Marcia S. de; Bonecker,Ana Cristina Teixeira; Valentin,Jean L..
Studies were carried out to find out qualitative and quantitative temporal variations in fish larvae to relate seasonal, diurnal and tidal cycles to the density of larvae. Sampling was performed at one station, during two three-day periods in September 1995 and March 1996. Samples were collected during ebb and flood tides,in oblique hauls using a bongo net of 500 µm mesh size. A total of 42 taxa were identified. The families Engraulidae (Cetengraulis edentulus, Anchoa lyolepis) and Clupeidae (Harengula jaguana) had high mean densities and dominated both periods. Higher larval mean densities occurred in March, a period of relatively high temperatures and low salinities. The diurnal pattern of larval abundance consisted of high densities at night and low...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish larvae; Seasonal variation; Tidal cycle; Diurnal variation; Coastal bay; Guanabara Bay.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100016
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DINÂMICA sazonal do carbono em campo úmido do cerrado. Infoteca-e
bitstream/CPAC-2009/25920/1/p2005_01.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Campo úmido; CO2.; Carbono; Cerrado; Metano; Química do Solo; Variação Sazonal.; Carbon; Seasonal variation; Soil chemistry..
Ano: 2005 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568726
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Host Preference and Seasonal Variation of Tick (Amblyomma cohaerens Donitz, 1909) on Naturally Infested Cattle in Jimma Zone, Southwestern Ethiopia JARTS
Gashaw, Abebaw.
The seasonal dynamics of tick Amblyomma cohaerens on naturally infested cattle in Jimma Zone was studied from September 1998 to September 2000 using fifty cattles in five Localities. Monthly tick counts were made for two consecutive years. Although, Amblyomma cohaerens infestation occurred throughout the year, it was greater at the beginning and end of the rainy season. High humidity and temperature were the factors that influence the seasonal variation.Th e study on the host preference of different blood groups showed that host selection and specificity correlate with the abundance and distribution of the tick. These have been reflected by the presence of more tick in highbred cattle than the indigenous Zebu.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal Science and Zoology Amblyomma cohaerens; Breed preference; Cattle tick; Ethiopia; Seasonal variation.
Ano: 2005 URL: http://www.jarts.info/index.php/jarts/article/view/81
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Diet of the ichthyofauna associated with marginal vegetation of a mangrove forest in southeastern Brazil Iheringia, Sér. Zool.
Corrêa,Michéle de O. D. A.; Uieda,Virgínia S..
The objective of this study was to analyze the diet of fish species that use the mangrove vegetation for shelter and feeding in a river southeastern Brazil. The fieldwork, including collecting and underwater observations, was carried out in the dry (July and August 2004) and in the rainy season (February and March 2005) in order to assess the existence of seasonal variation in the diets. Seven kinds of food items were consumed, two of plant origin and five of animal origin. Crustaceans predominated in the diet of most species, either in the form of unidentified fragments or discriminated in eight groups. The predominance of species using mainly a single food source (crustaceans, principally Ostracoda and Tanaidacea) and the existence of seasonal variation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding habit; Seasonal variation; Ontogenetic variation; Niche breadth.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400020
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Variação sazonal de alguns parâmetros físicos e químicos em três rios pertencentes a uma bacia de drenagem na região centro-sul do Estado do Paraná, Sul do Brasil - DOI: 10.4025/actascibiolsci.v30i4.5873 Biological Sciences
Krupek, Rogério Antônio; UNESP/Assis; Branco, Ciro Cesar Zanini; UNESP/Assis; Peres, Cleto Kaveski; UNESP/Assis.
Três rios de pequeno porte pertencentes à bacia do rio das Pedras, localizada na região centro-sul do Estado do Paraná, foram estudados com o objetivo de se analisar o padrão de variação sazonal de alguns parâmetros físicos e químicos da água. Os trabalhos de campo foram realizados no período de abril de 2004 a março de 2005 por meio de amostragens mensais. Os seguintes parâmetros limnológicos foram avaliados: temperatura da água, condutividade específica, oxigênio dissolvido, pH, turbidez, velocidade da correnteza e profundidade. As águas da bacia do rio das Pedras mostraram características muito peculiares, apresentando um padrão sazonal típico para algumas das variáveis limnológicas estudadas. A Análise de Variância (Anova) mostrou diferenças...
Palavras-chave: Bacia de drenagem; Riacho; Variação sazonal; Variáveis físicas e químicas drainage basin; Stream; Seasonal variation; Physical and chemical variables..
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5873
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Morphology and ecology of the planktonic diatom Palmerina hardmaniana (Greville) Hasle in southern Brazil Biota Neotropica
Garcia,Marinês; Odebrecht,Clarisse.
The diatom Palmerina hardmaniana (Greville) Hasle presents a wide geographical distribution in neritic tropical and subtropical regions. In the present work we analyzed plankton samples collected monthly between 1995 and 2007 at the surf zone of Cassino Beach, RS (32° 12' S and 52° 10' W), and in winter 2005 and summer 2007 at the continental shelf and slope in southern Brazil, Santa Marta Grande Cape, SC and Albardão-Chuí, RS regions (28° 23'-33° 07' S and 48° 41'-52° 26' W). We present the detailed morphological description of P. hardmaniana, and the first study including electron scanning microscope observations for material from the southwestern Atlantic Ocean. The morphometric data confirm the identity of the species in all its ultra-structural...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phytoplankton; Seasonal variation; Biogeography; Ultra-structure.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000200009
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Seasonal abundance of the Neotropic Cormorant (Phalacrocorax brasilianus) at Lagoa dos Patos estuary, Southern Brazil Hornero
Barquete,Viviane; Vooren,Carolus Maria; Bugoni,Leandro.
Censuses of the Neotropic Cormorant (Phalacrocorax brasilianus) were carried out at a power tower near the mouth of Lagoa dos Patos estuary, southern Brazil, from November 2001 to October 2002. At this major roosting site, a total of 309 counts over 47 days of census were performed to estimate monthly variation in the abundance of the Neotropic Cormorant. The highest abundance occurred in January (1390 birds), and the lowest in May (117 birds). The tower was a roosting site for cormorants at night, which arrived around 15:30 h onward, with numbers increasing near dusk. Birds preferentially used the lower levels of the tower (including the concrete base and levels 1 and 2) throughout the year and this preference could be partially due to strong winds in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abundance; Neotropic Cormorant; Phalacrocorax brasilianus; Roosting site; Seasonal variation.
Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072008000100003
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