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| Registros recuperados: 46 | |
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| Drakeford, Ben; Pascoe, Sean. |
| Intensive aquaculture, especially the production of carnivorous species, requires artificial feeding. Fishmeal and oil are preferred to vegetable proteins, since marine proteins provide the essential nutrients required by farmed fish. Therefore, given the stagnant production of reduction species and the rapid increase in aquaculture production, fishmeal availability would pose a biological constraint on aquaculture contribution to world fish supplies in the future, unless alternative feed sources can be incorporated in diets. In this paper, the technical substitutability between fish and vegetable based feeds are assessed through the estimation of Morishima elasticities of substitution. These are derived from a meta-analysis production function. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Fishmeal; Meta-analysis; Salmon; Trout; Elasticity; Livestock Production/Industries; Q2. |
| Ano: 2005 |
URL: http://purl.umn.edu/56074 |
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| Özer,Osman Orkan; Top,Berrin Taşkaya. |
| ABSTRACT The objective of this study was to calculate the price, cross, and Morishima Technical Substitution elasticities for the costs of manpower, supply of mulberry leaves, transportation, heating, and material, all of which play pivotal roles for producers in sericulture. A survey was conducted by face-to-face interviews with 207 farmers within the scope of the study. At the analysis phase of the study, the share equity translog cost model was used. The response of the producers to the production input prices were calculated as inelastic. The strictest demand for an input belongs to mulberry leaves (-0.051) and the highest elasticity for transportation costs (-0.314). Sericulture dependents on workforce and mulberry leaves and this activity in Turkey... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elasticity; Sericulture; Silkworm subsidies; Translogcost model. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001200917 |
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| Lak, Mohammadbagher; Minaei, Saeid; Soufizadeh, Saeid; Banakar, Ahmad. |
| Biophysical properties of agricultural materials are important in designing of processing machines. In this study, some physical properties of tomato (Solanum lycopersicum) fruits were determined and their mutual relationships were studied. Dimensions (major diameter, minor diameter, and length), mass, volume, fresh and dry matter weight, as well as rupture point under uniaxial loading were measured. Other properties; including Poisson's ratio, modulus of elasticity, energy for rupture, density, arithmetic mean diameter, geometric mean diameter, diameter of equivalent volume sphere, and sphericity were calculated accordingly. Statistical analysis of the data indicated significant correlations between the rupture force and fresh weight, volume, dry weight,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biosystems Engineering; Food Engineering correlation; Elasticity; Geometry; Mechanical properties; Rupture. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4880 |
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| Registros recuperados: 46 | |
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