Predator control

Xem 1-12 trên 12 kết quả Predator control
  • A preliminary study was carried out in mid 1999 on the status and potential impact of the introduction of exotic fish species in the Mekong Basin. Introductions have been made for four main purposes: aquaculture, stocking into lakes and reservoirs, pest control (mosquito) and the aquarium fish trade. Introductions of exotic species and movements of large quantities of fish for stocking are accompanied by risks to the environment, the possibility of native fish species declining through competition, predation or genetic interference, and the possible spread of disease....

    pdf60p nguyenngocsonctu 01-12-2010 79 18   Download

  • Strengthening functioning systems to improve health outcomes will, in some cases, require new ways of thinking about health investments and greater dialogue with partner countries about constraints and opportunities.

    pdf8p le_minh_nha 20-12-2012 32 15   Download

  • By playing a role in the near-annihilation of a species, Theodore Roosevelt, the president of the United States at the turn of the twentieth century, unwittingly laid the groundwork for the most dramatic triumph yet in the use of artificial insemination (AI) to rescue a species from extinction. In the early 1900s, waves of immigrants from Europe settled in the American Midwest. As humans transformed the land, they declared war on a perceived pest: the prairie dog.

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  • In 2002, an estimated 250,000 healthcare-associated pneumonias developed in U.S. hospitals and 36,000 of these were associated with deaths.1 Patients with mechanically-assisted ventilation have a high risk of developing healthcare-associated pneumonia. For the year 2011, NHSN facilities reported more than 3,525 VAPs and the incidence for various types of hospital units ranged from 0.0-4.9 per 1,000 ventilator days.2 Prevention and control of healthcare-associated pneumonia is discussed in the CDC/HICPAC document, Guidelines for Prevention of Healthcare-Associated Pneumonia, 20033.

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  • To represent the specific behaviors of this reflection, a schematic model was sought that simultaneously covered health promotion and the Health Policy for the Elderly, with a view to adopting actions for greater awareness, resulting in attitudes of empowerment and suggestions for gerontogeriatric nursing actions. Nola Pender’s Health Promotion Model(10) was used. Through a chart, it manages to represent the behaviors that can lead to health promotion. Nola Pender’s Model was developed in the United States in the 1980s, but was little explored in Brazil.

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  • This book began its evolution in 1999 when the British Antarctic Survey, where I worked at the time, began a new research programme on the management of marine ecosystems. This programme concentrated upon the krill-based ecosystem at SouthGeorgia which has been the subject of almost continuous study since the Discovery Expeditions in the 1920s. Latterly, international efforts to understand the dynamics of this ecosystem and the wider Southern Ocean have been coordinated by the Commission for the Conservation of AntarcticMarine Living Resources (CCAMLR)....

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article The Permanence and Extinction of a Discrete Predator-Prey System with Time Delay and Feedback Controls

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Dynamics of a Predator-Prey System Concerning Biological and Chemical Controls

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  • Encouraging active play and walking as a routine in the daily lives of young children may be important in preventing obesity. Children who sleep fewer hours a day are more at risk of obesity and active children tend to sleep longer (Taheri 2006 cited in Milano 2007). However, research into effective interventions for obesity is complex and although individually each factor may make only a small contribution to weight gain, the potential synergies may underestimate the overall impact of playing.

    pdf44p nhamnhiqa 01-03-2013 12 1   Download

  • A major aim of this workshop was to couple the theoretical information of lecture material to the practical aspects of formulating, making and storing farm made feeds. Unfortunately the equipment ordered for the workshop did not arrive due to factors beyond the control of the organisers. Hand operated equipment was used in its place with most of the feed making equipment and feed ingredients transported from the NDAL centre at Goroka to HAQDEC.

    pdf373p loginnhanh 22-04-2013 10 1   Download

  • Because of its accessibility, the intertidal zone has offered excellent opportunities to study the adaptations of individual organisms and populations to their environment, and the factors controlling community composition. Early work on seashores concentrated on the problems of life in an environment characterized by steep gradients in physical conditions, but in more recent years, the focus of research on the fascinating shore ecosystems has been on understanding the processes controlling their productivity and dynamic functioning.

    pdf549p 951628473 07-05-2012 57 17   Download

  • This category of pests is widespread and affects every stage of poultry production to a greater or lesser extent. The house fly (Musca domestica) and other fly species with similar biology and habits can generally be managed with minimal use of pesticides where appropriate cultural and biological control practices are most effective (broiler breeders and layers). Manure management to reduce moisture reduces fly-breeding potential and enhances the effectiveness of naturally occurring fly parasites and predators.

    pdf18p loginnhanh 22-04-2013 17 1   Download


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