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Livestock Industry (livestock + industry)

Distribution by Scientific Domains

Life Sciences	50%
Business, Economics, Finance and Accounting	30%

Selected Abstracts

China's booming livestock industry: household income, specialization, and exit

AGRICULTURAL ECONOMICS, Issue 6 2009
Allan N. Rae
China; Livestock industry; Specialization; Exit Abstract China's production of livestock products has generally kept pace with her rapidly increasing demand. Over-supply and market corrections for various livestock products took place over the latter part of the 1990s and large numbers of householders exited this type of production. Using household survey data, we estimate the relationship between a household's specialization in livestock production and household net income in 1995, and use a logit model to explore some predictors of household exit from livestock production over the following decade of market instability. We conclude that specialist livestock households with access to necessary skills, technologies, and markets increase their incomes from further livestock specialization in the base year, whereas those to whom livestock production is relatively unimportant can increase household incomes by diverting their resources away from animal husbandry. It was specialist rather than diversified livestock households that tended to bear the brunt of the adjustment to unfavorable price movements over the decade post-1995. Policy concerns include the exit of larger-scale specialized producers who tended to earn relatively high household incomes in 1995, barriers to the effective formation and operation of horizontal and vertical integration options to help mitigate market instability, the further development of insurance programs and markets for livestock producers, and development assistance to livestock households that for various reasons cannot increase scale and specialization. [source]

Isolation and characterization of microsatellite markers in the new world screw-worm Cochliomyia hominivorax (Diptera: Calliphoridae)

MOLECULAR ECOLOGY RESOURCES, Issue 2 2004
T. T. Torres
Abstract The new world screw-worm, Cochliomyia hominivorax, is one of the most important parasitic insect pests. This species causes myiasis and, consequently, significant losses to livestock industries in neotropical regions. As part of an investigation into the genetic variability and population structure of the new world screw-worm, a set of 10 polymorphic microsatellite markers was isolated from an AC-enriched genomic library. Amplification of the reported loci in 30 screw-worms revealed an average of 6.9 alleles per locus with expected heterozygosities ranging from 0.3831 to 0.8022. Cross-species amplifications suggested that these loci may be useful in other Calliphoridae species. [source]

Anatomy and physiology of the gastro-intestinal tract and growth curves of the ostrich (Struthio camelus)

ANIMAL SCIENCE JOURNAL, Issue 6 2004
Ross G. COOPER
ABSTRACT The ostrich is an important animal in many livestock industries and in the developing world. The digestive system of the ostrich differs considerably from that of non-ruminant animals or poultry. The genetic potential of an ostrich can be described by its characteristic growth curve. This present paper presents an account of the rearing, anatomy of the gastro-intestinal tract, and growth curves of this bird. [source]

Review of identification and traceability legislation for pigs in Australia

AUSTRALIAN VETERINARY JOURNAL, Issue 7 2007
N Schembri
Objective To assess Australia's capability to trace pig movements in the event of an exotic disease outbreak by highlighting the commonalities and inconsistencies between the various state and territory legislations in defining how pig producers are located; their pigs are identified; and whether movement records are required post,farm gate. Procedure A review of the identification and traceability legislation applicable to pigs in Australia was undertaken over a 6 month period. The appropriate legislative Acts and Regulations were downloaded from the Australasian Legal Information Institute internet site (http://www.austlii.edu.au/) and reviewed. Results The Australian pig industry currently uses the branding method (tattooing) to identify pigs for sale or slaughter, with each state responsible for its own pig identification and movement control systems. Areas of concern identified included inconsistencies with the minimum weight or age of pigs that require identification; discrepancies between methods of tattoo registration and shortfalls in documentation for recording pig movements. Conclusion Our findings highlight the flaws in Australia's current state legislative Acts and Regulations for identifying pigs and tracking their movements, which compromise the ability of jurisdictions to meet the endorsed National Performance Standards. Improvements in these areas will enhance security to the pig and other livestock industries in the event of future exotic disease outbreaks. [source]

Political economy, sectoral shocks, and border enforcement

CANADIAN JOURNAL OF ECONOMICS, Issue 3 2001
Gordon H. Hanson
In this paper, we examine the correlation between sectoral shocks and border enforcement in the United States, the U.S. government's main policy instrument for combating illegal immigration. We see whether border enforcement falls following positive shocks to sectors that are intensive in the use of undocumented labour, as would be consistent with political economy models of illegal immigration. We find that border enforcement is negatively correlated with lagged relative price changes in the apparel, fruits and vegetables, and livestock industries and with housing starts in western United States, suggesting that authorities relax border enforcement when demand forundocumented labour is high. Economie politique, chocs sectoriels et vigilance aux frontières. Dans ce mémoire, les auteurs examinent la corrélation entre les chocs sectoriels et la vigilance aux frontières aux Etats-Unis. La vigilance aux frontières est le principal instrument de politique publique utilisé par le gouvernement américain pour combattre l'immigration illégale. On se demande si la vigilance aux frontières se relâche à la suite de chocs positifs dans des secteurs qui utilisent relativement plus de travailleurs illégaux, ainsi que le suggèrent les modèles d'économie politique de l'immigration illégale. Les principaux résultats indiquent que la vigilance aux frontières est co-reliée négativement (avec un délai) avec les changements de prix relatifs dans les secteurs du vêtement, des fruits et légumes, et du bétail, ainsi qu'avec le nombre de mises en chantier dans la construction domiciliaire dans l'ouest des Etats-Unis. Voilà qui suggère que les autorités relâchent la vigilance aux frontières quand la demande de travailleurs illégaux augmente. [source]

The Late Prehistoric,Early Historic Game Sink in the Northwestern United States

CONSERVATION BIOLOGY, Issue 1 2002
R. Lee Lyman
The number of big game killed by the Corps of Discovery in 1805,1806 and recorded by Lewis and Clark suggests that ungulates were abundant in central and eastern Montana and rare in western Montana, central Idaho, and southeastern Washington during the early nineteenth century. Paleoecologists Paul Martin and Chris Szuter conclude that this difference was a function of human predation. They support their conclusion that ungulates would have been abundant in southeastern Washington had humans not hunted them by arguing that the nineteenth-century livestock industry was successful without supplemental feeding. The livestock industry was, however, not consistently successful until artificial feeding was initiated. Archaeological data from eastern Washington indicate that ungulates have been taken by human hunters more frequently than small-mammal prey throughout the last 10,000 years and that ungulates decreased relative to small mammals coincident with changes in climate. Bison ( Bison bison) and elk (Cervus canadensis) were present in eastern Washington throughout the Holocene, but bison were abundant there only during a cooler and moister period; elk have been abundant only in the twentieth century, subsequent to transplants and the extermination of predators. Geographic variation in the abundance of bison across Montana, Idaho, and eastern Washington has been influenced by human predation but has also been influenced by biogeographic history, habitat differences, and climatic change. Resumen: Los datos históricos proveen información valiosa sobre las estructuras de los ecosistemas, sus funciones y procesos. El número de animales de caza grandes que fueron sacrificados por las tropas de descubrimiento en 1805-1806 y registradas por Lewis y Clark sugieren que los ungulados eran abundantes en Montana central y oriental y raros en Montana occidental, Idaho central y el sudeste de Washington durante los inicios del siglo diecinueve. Los paleontólogos Paul Martin y Chris Szuter concluyen que esta diferencia fue causada por la depredación humana. Ellos apoyan su conclusión de que los ungulados podrían haber sido abundantes en el sudeste de Washington si los humanos no los hubieran cazado argumentando que la industria de la ganadería del siglo diecinueve exitosa sin alimento suplementario. Sin embargo, la industria de la ganadería no fue consistentemente exitosa hasta que se inició la alimentación artificial. Los datos arqueológicos de Washington oriental indican que los ungulados fueron eliminados por los cazadores humanos mas frecuentemente que las presas pequeñas de mamíferos a lo largo de los últimos 10,000 años y que la disminución de ungulados, relativa a la de mamíferos pequeños coincidió con cambios en el clima. El bisonte (Bison bison) y el alce (Cervus canadiensis) estuvieron presentes en Washington oriental a lo largo del Holoceno, pero los bisontes fueron abundantes solo durante un periodo mas frío y húmedo; los alces habían sido abundantes solo en el siglo veinte subsecuente a los transplantes y a la exterminación de los depredadores. La variación en la abundancia de alces a lo largo de Montana, Idaho y el oriente de Washington estuvo influenciada por la depredación humana, pero también por la historia biogeográfica, las diferencias en hábitat y el cambio climático. [source]

China's booming livestock industry: household income, specialization, and exit

Enabling technologies to improve area-wide integrated pest management programmes for the control of screwworms

MEDICAL AND VETERINARY ENTOMOLOGY, Issue 2009
A. S. ROBINSON
Abstract The economic devastation caused in the past by the New World screwworm fly Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae) to the livestock industry in the U.S.A., Mexico and the rest of Central America was staggering. The eradication of this major livestock pest from North and Central America using the sterile insect technique (SIT) as part of an area-wide integrated pest management (AW-IPM) programme was a phenomenal technical and managerial accomplishment with enormous economic implications. The area is maintained screwworm-free by the weekly release of 40 million sterile flies in the Darien Gap in Panama, which prevents migration from screwworm-infested areas in Columbia. However, the species is still a major pest in many areas of the Caribbean and South America and there is considerable interest in extending the eradication programme to these countries. Understanding New World screwworm fly populations in the Caribbean and South America, which represent a continuous threat to the screwworm-free areas of Central America and the U.S.A., is a prerequisite to any future eradication campaigns. The Old World screwworm fly Chrysomya bezziana Villeneuve (Diptera: Calliphoridae) has a very wide distribution ranging from Southern Africa to Papua New Guinea and, although its economic importance is assumed to be less than that of its New World counterpart, it is a serious pest in extensive livestock production and a constant threat to pest-free areas such as Australia. In the 1980s repeated introductions and an expansion of Old World screwworm populations were reported in the Middle East; in the 1990s it invaded Iraq and since late 2007 it has been reported in Yemen, where a severe outbreak of myiasis occurred in 2008. Small-scale field trials have shown the potential of integrating the SIT in the control of this pest and various international organizations are considering using the release of sterile insects as part of an AW-IPM approach on a much wider scale. Wohlfahrtia magnifica (Schiner) (Diptera: Sarcophagidae) is a screwworm of temperate regions, which, although of limited agricultural importance, has invaded several new locations in the past few years. This special issue reports on the results of a 6-year project funded by the Joint Food and Agriculture Organization of the United Nations/International Atomic Energy Agency (FAO/IAEA) Programme of Nuclear Techniques in Food and Agriculture entitled ,Enabling Technologies for the Expansion of the SIT for Old and New World Screwworm'. A major goal of the project was to better understand population genetic variation in screwworms as an aid to the identification of isolated populations. The project also addressed issues related to genetic sexing, cuticular hydrocarbons, population dynamics, genetic transformation and chromosome analysis. [source]

Treatment of cow-waste slurry by a microbial fuel cell and the properties of the treated slurry as a liquid manure

ANIMAL SCIENCE JOURNAL, Issue 6 2006
Hiroshi YOKOYAMA
ABSTRACT Resource recycling and the proper treatment of animal waste to reduce its environmental impact are currently important issues for the livestock industry. A microbial fuel cell (MFC), a new type of bioreactor, is expected to play roles in both waste-water purification and energy recovery. However, the generation of electricity from cow waste has not yet been examined. In this study, using an MFC, we examined the possibility of generating electricity from dairy-cow waste slurry, and analyzed the properties of the treated slurry as liquid manure for resource recycling. The MFC treatment of the slurry generated electricity in a dose-dependent manner, and the maximum power output by the MFC from a 1 g of chemical oxygen demand/L slurry was 0.34 mW/m2. After the MFC treatment, 84% of the biological oxygen demand in the slurry was removed and three essential fertilizer elements (nitrogen, phosphorus, and potassium) were retained at 84, 70, and 91% levels, respectively. The amount of ammonia nitrogen in the slurry, as an element of fast-release fertilizer, was increased by 1.9-fold. Although the treated slurry displayed properties that made it preferable as liquid manure, further studies to improve the electrical power output by the MFC are required for practical use. [source]

Ammonia reduction in seawater by Yucca schidigera extract: efficacy analysis and empirical modelling

AQUACULTURE RESEARCH, Issue 8 2010
Roberto A Santacruz-Reyes
Abstract Yucca schidigera is a plant native to southwestern USA and Mexico. Its extract has been used in the livestock industry to control ammonia accumulation in animal holding facilities, and to reduce ammonia concentration in animal excreta. This study investigated the potential and effectiveness of Y. schidigera extract (YUPE) for ammonia reduction in seawater. A dose,response experiment was conducted to determine the effect of different concentrations of YUPE at 0, 18, 36, 72 and 108 mg L,1 on total ammonia nitrogen (TAN) at 1, 3 and 9 mg L,1. At a higher YUPE dosage rate, higher TAN reduction was observed, and TAN reduction was highest during the first 12 h, and decreased thereafter. A stepwise multiple linear regression that included the initial TAN, YUPE concentration and time was developed, which accurately predicted empirical TAN concentrations. Applications of this model for ammonia management strategies were formulated for hypothetical tiger prawn (Penaeus monodon) rearing conditions. YUPE's efficacy for ammonia reduction, natural origin and safety make YUPE a potentially suitable compound for water quality management in mariculture. [source]