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| Registros recuperados: 86 | |
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| Lavens, P.; Sorgeloos, P.. |
| It is generally accepted, that a major constraint in the further development of marine fish and crustacean aquaculture, is the variable quality of eggs and larvae used for the hatchery-production of fry. Nonetheless, valid criteria to evaluate optimal egg quality have not been identified yet. Instead, particular indicators, are used, e.g. the fertilization and hatching rate, overall culture success during the first rearing period, etc., but these are not totally objective because hatchery-specific conditions may interfere. The biochemical composition of the egg may be one of the possible determinants of egg quality, which can be evaluated on a more objectie basis. In this respect, studied have been initiated to analyze in freshly-released eggs, the levels... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture techniques; Biochemical composition; Crustacean culture; Eggs; Fatty acids; Fish culture; Hatcheries; Quality control; Vitamin C. |
| Ano: 1991 |
URL: http://www.vliz.be/imisdocs/publications/262328.pdf |
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| Cavalli, R.O.; Menschaert, G.; Lavens, P.; Sorgeloos, P.. |
| The effects of increasing levels of dietary phospholipids (PL) on the reproductive performance, egg and larval quality, and lipid composition of females of the freshwater prawn <i>Macrobrachium rosenbergii</i> were investigated. Three isolipidic diets containing similar amounts of highly unsaturated fatty acids but varying levels of PL (0.8, 2.4 and 4.6%) were fed during 180 days to three groups of eight females originating from Thai ponds. No significant differences were observed for fecundity, egg size and hatchability, starved larvae size, and size, survival and tolerance to stress of 8 day-old larvae. Similarly, no major differences in the lipid composition of the midgut gland, ovaries and muscle tissue of females could be detected. Results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal nutrition; Brood stocks; Complex lipids; Diets; Eggs; Feed composition; Feeding experiments; Females; Prawn culture; Sexual maturity; Sexual reproduction; Macrobrachium rosenbergii; Thailand. |
| Ano: 2000 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3347 |
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| Ahearn, Mary Clare; Korb, Penelope J.; Banker, David E.. |
| This paper examines the industrialization process of U.S. agriculture by examining the trends in the number of farms, the concentration of production during the last decade, and the dynamics of farm survivability, entry, and exit underlying aggregate statistics. We next examine vertical coordination as part of the industrialization process and highlight contracting in the poultry industry. The analysis provides evidence that production is continuing to be concentrated on a smaller number of farms at a relatively rapid rate, in spite of the stability in the number of farms. Although contracting clearly dominates the broiler industry, it is less prevalent in egg and turkey production, where other forms of vertical coordination are likely established. |
| Tipo: Journal Article |
Palavras-chave: Broilers; Contracting; Eggs; Industrialization; Poultry; Structural change; Turkeys; Vertical integration; D23; D40; L11; L14 L22; L23; Q12. |
| Ano: 2005 |
URL: http://purl.umn.edu/43511 |
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| Peterson, Hikaru Hanawa. |
| As increasingly more transactions occur away from open markets, the so-called "thin" market issues arise. This paper analyzes unpublished transaction data from Egg Clearinghouse, Inc. (ECI), a marginal marketplace for eggs that trades 4% of all eggs (80% of eggs available for open trading). Results suggest that marginalized markets can serve as an inventory adjustment mechanism while maintaining the role of price discovery as a check for non-market prices. At ECI, most firms both buy and sell regardless of operational types, participation is balanced across all types of firms in the industry, and sellers in general yield to buyers' preferred terms of trade. |
| Tipo: Journal Article |
Palavras-chave: Eggs; Inventory adjustment; Organized market; Price discovery; Thin market; Agribusiness. |
| Ano: 2005 |
URL: http://purl.umn.edu/30981 |
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| Chang, Jae Bong; Lusk, Jayson L.; Norwood, F. Bailey. |
| This paper analyzes price differentials among conventional, cage-free, organic, and Omega-3 eggs using retail scanner data from two regional markets and the United States as a whole. Results reveal significant premiums attributable to cage-free (a 57% premium on average) and organic (an 85% premium on average). However, significant variation exists among geographic locations; price premiums for organic over conventional eggs in Dallas are almost twice as high as those in San Francisco. Estimates indicate that about 42% of the typically observed premium for cage-free eggs over conventional eggs (and 36% of the premium for organic eggs) can be attributed to egg color rather than differences in hens’ living conditions. Despite the large implicit price... |
| Tipo: Journal Article |
Palavras-chave: Animal welfare; Cage-free; Eggs; Free-range; Hedonic; Organic; Demand and Price Analysis; Livestock Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/97855 |
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| Barej,R; Dobrzański,Z; Popiela-Pleban,E; Bubel,F; Polak-Juszczak,L. |
| ABSTRACT The aim of the study was to evaluate the effectiveness of preventive-detox preparation (P-dP) based on humic and aluminosilicate substances in the diet of laying hens (3% daily dose) previously intoxicated with methylmercury chloride (CH3ClHg, 5 mg Hg/kg feed mixture) for six weeks. Mercury content in the whole eggs of the group intoxicated with CH3ClHg increased compared to the control group: 488-fold after 1 wk, 622-fold after 2 wks, and 853-fold after 6 wks of intoxication. The use of P-dP in the group previously intoxicated with CH3ClHg reduced he mercury content of whole eggs by 18.4%, on average, whereas the average was 29.9% two weeks after the discontinuation of CH3ClHg and P-dP supply. Maximum Hg content in the whole egg was observed in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Humic-aluminosilicate preparation; Mercury. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400531 |
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| Duarte,CRA; Murakami,AE; Boso,KMO; Eyng,C; Ospina-Rojas,IC; Matumoto-Pintro,PT. |
| This study evaluated the performance and the quality and fatty acid profile of eggs from laying hens fed diets containing mixed crude glycerin (MCG; 80% vegetable fat + 20% animal fat). A total of 240 39-week-old Hy-Line W36 laying hens were distributed according to a completely randomized experimental design into six treatments consisting of graded MCG dietary inclusion levels (0, 1.5, 3.0, 4.5, 6.0, and 7.5%), with five replicates of eight birds each. Feed intake linearly decreased (p<0.05) with increasing MCG inclusion levels. The percentages of myristic, palmitic, and α-linolenic acids in the eggs linearly decreased as MCG dietary levels increased (p<0.05), while α-linoleic acid, polyunsaturated fatty acids (PUFA) and ω-6/ω-3 ratio linearly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Excreta moisture; Eggs; Fatty acids; Glycerin; Glycerol; Lipid profile. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000400003 |
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| Vetrivel,SC; Chandrakumarmangalam,S. |
| Poultry farming in India, in spite of several constraints, has progressed considerably during the last decade. The present study has been undertaken to examine various aspects related to the growth and development of poultry production in the country. Poultry production in India was confined to backyards till recently. Local breed of birds were reared for the supply of eggs and meat. The increasing demand for poultry products necessitates augmenting the supply by importing improved breeds of poultry. In 1961, the proportion of hybrid populations in the total population of poultry was about 2 percent. Within a couple of decades, these birds have dominated the market sidelining the indigenous birds. The technological advances have revolutionized the role and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Supply; Production; Technology; Growth; Population. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400001 |
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| Raghiante,F; Rocha,TS; Rossi,DA; Silva,PL. |
| This study aimed at determining the minimum time required for the penetration of Salmonella Heidelberg inside the eggs after contact with contaminated material. Recently-collected brown and white eggs from laying hens between 45-50 weeks of age, reared in a commercial poultry house, were artificially contaminated by contact with wood shavings moistened with liquid inoculum of Salmonella Heidelberg in stationary-growth phase (10³-10(4) CFU g-1). According to type (white or brown), eggs were distributed into three different groups, with four replicates each: negative control group (no artificial contamination), positive control group (analyzed externally immediately after contamination and internally after the maximum storage period of the test group) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Penetration time; Salmonella Heidelberg. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400009 |
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| Fernandez,IB; Cruz,VC; Polycarpo,GV. |
| The objective of this study was to evaluate the internal quality of eggs of Japanese quails fed diets supplemented with chelated selenium and zinc. The experiment was carried out for 120 days, and 144 birds were divided in random blocks into four treatments (control; 0.3 ppm Se; 60 ppm Zn and 0.3 ppm Se + 60 ppm Zn). Ten, 14, 18, and 22 weeks after the beginning of lay, eggs were collected and stored under two different temperatures (environmental temperature or refrigeration) and for 10, 20, and 30 days. Eggs were analyzed for: Haugh units (HU), albumen height (AH), yolk index (YI), and albumen index (AI). Parameters were only statistically influenced by the interaction between dietary treatment and storage time. It was concluded that the addition of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Organic trace minerals; Quails; Storage; Temperature. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000100006 |
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| Santos,FC dos; Brandão,MDM; Silva,CC da; Machado,LS; Soares,MV; Barreto,ML; Nascimento,ER do; Pereira,VLA. |
| A farm with 3,000 free-range hens between 24 and 65 weeks of age was investigated. These hens were separated in small flocks of 400 to 700 birds, presenting 10 to 23% egg production reduction. Twenty serum samples were collected during the period of drop in egg production and three weeks later for the investigation of Mycoplasma synoviae (MS), M. gallisepticum (MG) and Infectious Bronchitis Virus (IBV) antibodies using ELISA. At the time of the second collection, egg production had resumed to normal levels; however, with 10.23% of the eggs showed eggshell abnormalities limited to the apex. Eggshell strength was significantly different between normal and those with eggshell apex abnormalities, but not other egg-quality parameters. ELISA tests showed that MS... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Mycoplasm; Egg defects; Egg abnormality; Economic loss. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200015 |
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| Pizzolante,CC; Saldanha,ESPB; Laganá,C; Kakimoto,SK; Togashi,CK. |
| A 112-day trial was carried out to evaluate the effect of dietary calcium level and limestone particle size on the egg quality of 288 Hy-Line Brown semi-heavy layers, with 83 weeks of age at the beginning of the experiment. A completely randomized experimental design was applied in a 2x3 factorial arrangement, with two dietary calcium levels (3.5 and 4.0%) e three limestone particle size compositions (100% fine limestone (FL), with 0.185mm; 30% coarse limestone (CL), with 2.83mm, + 70% FL, with 0.185mm; and 50% CL, with 2.83mm, + 50% FL, with 0.185mm), with six replicates of eight birds each. Mean geometric diameter and in-vitro solubility of the limestone sources were, respectively, 0.185mm and 18.7% for the fine limestone, and 2.83mm and 10.5% for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Eggshell quality; Layers; Levels; Minerals. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200002 |
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| Registros recuperados: 86 | |
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